NEWS revision 1.35
1 News for the tz database 2 3 Release 2022a - 2022-03-15 23:02:01 -0700 4 5 Briefly: 6 Palestine will spring forward on 2022-03-27, not -03-26. 7 zdump -v now outputs better failure indications. 8 Bug fixes for code that reads corrupted TZif data. 9 10 Changes to future timestamps 11 12 Palestine will spring forward on 2022-03-27, not 2022-03-26. 13 (Thanks to Heba Hamad.) Predict future transitions for first 14 Sunday >= March 25. Additionally, predict fallbacks to be the first 15 Friday on or after October 23, not October's last Friday, to be more 16 consistent with recent practice. The first differing fallback 17 prediction is on 2025-10-24, not 2025-10-31. 18 19 Changes to past timestamps 20 21 From 1992 through spring 1996, Ukraine's DST transitions were at 22 02:00 standard time, not at 01:00 UTC. (Thanks to Alois Treindl.) 23 24 Chile's Santiago Mean Time and its LMT precursor have been adjusted 25 eastward by 1 second to align with past and present law. 26 27 Changes to commentary 28 29 Add several references for Chile's 1946/1947 transitions, some of 30 which only affected portions of the country. 31 32 Changes to code 33 34 Fix bug when mktime gets confused by truncated TZif files with 35 unspecified local time. (Problem reported by Almaz Mingaleev.) 36 37 Fix bug when 32-bit time_t code reads malformed 64-bit TZif data. 38 (Problem reported by Christos Zoulas.) 39 40 When reading a version 2 or later TZif file, the TZif reader now 41 validates the version 1 header and data block only enough to skip 42 over them, as recommended by RFC 8536 section 4. Also, the TZif 43 reader no longer mistakenly attempts to parse a version 1 TZIf 44 file header as a TZ string. 45 46 zdump -v now outputs "(localtime failed)" and "(gmtime failed)" 47 when local time and UT cannot be determined for a timestamp. 48 49 Changes to build procedure 50 51 Distribution tarballs now use standard POSIX.1-1988 ustar format 52 instead of GNU format. Although the formats are almost identical 53 for these tarballs, ustar headers' magic fields contain "ustar" 54 instead of "ustar ", and their version fields contain "00" instead 55 of " ". The two formats are planned to diverge more significantly 56 for tzdb releases after 2242-03-16 12:56:31 UTC, when the ustar 57 format becomes obsolete and the tarballs switch to pax format, an 58 extension of ustar. For details about these formats, please see 59 "pax - portable archive interchange", IEEE Std 1003.1-2017, 60 <https://pubs.opengroup.org/onlinepubs/9699919799/utilities/pax.html#tag_20_92_13>. 61 62 63 Release 2021e - 2021-10-21 18:41:00 -0700 64 65 Changes to future timestamps 66 67 Palestine will fall back 10-29 (not 10-30) at 01:00. 68 (Thanks to P Chan and Heba Hemad.) 69 70 71 Release 2021d - 2021-10-15 13:48:18 -0700 72 73 Briefly: 74 Fiji suspends DST for the 2021/2022 season. 75 'zic -r' marks unspecified timestamps with "-00". 76 77 Changes to future timestamps 78 79 Fiji will suspend observance of DST for the 2021/2022 season. 80 Assume for now that it will return next year. (Thanks to Jashneel 81 Kumar and P Chan.) 82 83 Changes to code 84 85 'zic -r' now uses "-00" time zone abbreviations for intervals 86 with UT offsets that are unspecified due to -r truncation. 87 This implements a change in draft Internet RFC 8536bis. 88 89 90 Release 2021c - 2021-10-01 14:21:49 -0700 91 92 Briefly: 93 Revert most 2021b changes to 'backward'. 94 Fix 'zic -b fat' bug in pre-1970 32-bit data. 95 Fix two Link line typos. 96 Distribute SECURITY file. 97 98 This release is intended as a bugfix release, to fix compatibility 99 problems and typos reported since 2021b was released. 100 101 Changes to Link directives 102 103 Revert almost all of 2021b's changes to the 'backward' file, 104 by moving Link directives back to where they were in 2021a. 105 Although 'zic' doesn't care which source file contains a Link 106 directive, some downstream uses ran into trouble with the move. 107 (Problem reported by Stephen Colebourne for Joda-Time.) 108 109 Fix typo that linked Atlantic/Jan_Mayen to the wrong location 110 (problem reported by Chris Walton). 111 112 Fix 'backzone' typo that linked America/Virgin to the wrong 113 location (problem reported by Michael Deckers). 114 115 Changes to code 116 117 Fix a bug in 'zic -b fat' that caused old timestamps to be 118 mishandled in 32-bit-only readers (problem reported by Daniel 119 Fischer). 120 121 Changes to documentation 122 123 Distribute the SECURITY file (problem reported by Andreas Radke). 124 125 126 Release 2021b - 2021-09-24 16:23:00 -0700 127 128 Briefly: 129 Jordan now starts DST on February's last Thursday. 130 Samoa no longer observes DST. 131 Merge more location-based Zones whose timestamps agree since 1970. 132 Move some backward-compatibility links to 'backward'. 133 Rename Pacific/Enderbury to Pacific/Kanton. 134 Correct many pre-1993 transitions in Malawi, Portugal, etc. 135 zic now creates each output file or link atomically. 136 zic -L no longer omits the POSIX TZ string in its output. 137 zic fixes for truncation and leap second table expiration. 138 zic now follows POSIX for TZ strings using all-year DST. 139 Fix some localtime crashes and bugs in obscure cases. 140 zdump -v now outputs more-useful boundary cases. 141 tzfile.5 better matches a draft successor to RFC 8536. 142 A new file SECURITY. 143 144 This release is prompted by recent announcements by Jordan and Samoa. 145 It incorporates many other changes that had accumulated since 2021a. 146 However, it omits most proposed changes that merged all Zones 147 agreeing since 1970, as concerns were raised about doing too many of 148 these changes at once. It does keeps some of these changes in the 149 interest of making tzdb more equitable one step at a time; see 150 "Merge more location-based Zones" below. 151 152 Changes to future timestamps 153 154 Jordan now starts DST on February's last Thursday. 155 (Thanks to Steffen Thorsen.) 156 157 Samoa no longer observes DST. (Thanks to Geoffrey D. Bennett.) 158 159 Changes to zone name 160 161 Rename Pacific/Enderbury to Pacific/Kanton. When we added 162 Enderbury in 1993, we did not know that it is uninhabited and that 163 Kanton (population two dozen) is the only inhabited location in 164 that timezone. The old name is now a backward-compatility link. 165 166 Changes to past timestamps 167 168 Correct many pre-1993 transitions, fixing entries originally 169 derived from Shanks, Whitman, and Mundell. The fixes include: 170 - Barbados: standard time was introduced in 1911, not 1932; and 171 DST was observed in 1942-1944 172 - Cook Islands: In 1899 they switched from east to west of GMT, 173 celebrating Christmas for two days. They (and Niue) switched 174 to standard time in 1952, not 1901. 175 - Guyana: corrected LMT for Georgetown; the introduction of 176 standard time in 1911, not 1915; and corrections to 1975 and 177 1992 transitions 178 - Kanton: uninhabited before 1937-08-31 179 - Niue: only observed -11:20 from 1952 through 1964, then went to 180 -11 instead of -11:30 181 - Portugal: DST was observed in 1950 182 - Tonga: corrected LMT; the introduction of standard time in 1945, 183 not 1901; and corrections to the transition from +12:20 to +13 184 in 1961, not 1941 185 Additional fixes to entries in the 'backzone' file include: 186 - Enderbury: inhabited only 1860/1885 and 1938-03-06/1942-02-09 187 - The Gambia: 1933 and 1942 transitions 188 - Malawi: several 1911 through 1925 transitions 189 - Sierra Leone: several 1913 through 1941 transitions, and DST 190 was NOT observed in 1957 through 1962 191 (Thanks to P Chan, Michael Deckers, Alexander Krivenyshev and 192 Alois Treindl.) 193 194 Merge more location-based Zones whose timestamps agree since 1970, 195 as pre-1970 timestamps are out of scope. This is part of a 196 process that has been ongoing since 2013. This does not affect 197 post-1970 timestamps, and timezone historians who build with 'make 198 PACKRATDATA=backzone' should see no changes to pre-1970 timestamps. 199 When merging, keep the most-populous location's data, and move 200 data for other locations to 'backzone' with a backward 201 link in 'backward'. For example, move America/Creston data to 202 'backzone' with a link in 'backward' from America/Phoenix because 203 the two timezones' timestamps agree since 1970; this change 204 affects some pre-1968 timestamps in America/Creston because 205 Creston and Phoenix disagreed before 1968. The affected Zones 206 are Africa/Accra, America/Atikokan, America/Blanc-Sablon, 207 America/Creston, America/Curacao, America/Nassau, 208 America/Port_of_Spain, Antarctica/DumontDUrville, and 209 Antarctica/Syowa. 210 211 Changes to maintenance procedure 212 213 The new file SECURITY covers how to report security-related bugs. 214 215 Several backward-compatibility links have been moved to the 216 'backward' file. These links, which range from Africa/Addis_Ababa 217 to Pacific/Saipan, are only for compatibility with now-obsolete 218 guidelines suggesting an entry for every ISO 3166 code. 219 The intercontinental convenience links Asia/Istanbul and 220 Europe/Nicosia have also been moved to 'backward'. 221 222 Changes to code 223 224 zic now creates each output file or link atomically, 225 possibly by creating a temporary file and then renaming it. 226 This avoids races where a TZ setting would temporarily stop 227 working while zic was installing a replacement file or link. 228 229 zic -L no longer omits the POSIX TZ string in its output. 230 Starting with 2020a, zic -L truncated its output according to the 231 "Expires" directive or "#expires" comment in the leapseconds file. 232 The resulting TZif files omitted daylight saving transitions after 233 the leap second table expired, which led to far less-accurate 234 predictions of times after the expiry. Although future timestamps 235 cannot be converted accurately in the presence of leap seconds, it 236 is more accurate to convert near-future timestamps with a few 237 seconds error than with an hour error, so zic -L no longer 238 truncates output in this way. 239 240 Instead, when zic -L is given the "Expires" directive, it now 241 outputs the expiration by appending a no-change entry to the leap 242 second table. Although this should work well with most TZif 243 readers, it does not conform to Internet RFC 8536 and some pickier 244 clients (including tzdb 2017c through 2021a) reject it, so 245 "Expires" directives are currently disabled by default. To enable 246 them, set the EXPIRES_LINE Makefile variable. If a TZif file uses 247 this new feature it is marked with a new TZif version number 4, 248 a format intended to be documented in a successor to RFC 8536. 249 250 zic -L LEAPFILE -r @LO no longer generates an invalid TZif file 251 that omits leap second information for the range LO..B when LO 252 falls between two leap seconds A and B. Instead, it generates a 253 TZif version 4 file that represents the previously-missing 254 information. 255 256 The TZif reader now allows the leap second table to begin with a 257 correction other than -1 or +1, and to contain adjacent 258 transitions with equal corrections. This supports TZif version 4. 259 260 The TZif reader now lets leap seconds occur less than 28 days 261 apart. This supports possible future TZif extensions. 262 263 Fix bug that caused 'localtime' etc. to crash when TZ was 264 set to a all-year DST string like "EST5EDT4,0/0,J365/25" that does 265 not conform to POSIX but does conform to Internet RFC 8536. 266 267 Fix another bug that caused 'localtime' etc. to crash when TZ was 268 set to a POSIX-conforming but unusual TZ string like 269 "EST5EDT4,0/0,J365/0", where almost all the year is DST. 270 271 Fix yet another bug that caused 'localtime' etc. to mishandle slim 272 TZif files containing leap seconds after the last explicit 273 transition in the table, or when handling far-future timestamps 274 in slim TZif files lacking leap seconds. 275 276 Fix localtime misbehavior involving positive leap seconds. 277 This change affects only behavior for "right" system time, 278 which contains leap seconds, and only if the UT offset is 279 not a multiple of 60 seconds when a positive leap second occurs. 280 (No such timezone exists in tzdb, luckily.) Without the fix, 281 the timestamp was ambiguous during a positive leap second. 282 With the fix, any seconds occurring after a positive leap second 283 and within the same localtime minute are counted through 60, not 284 through 59; their UT offset (tm_gmtoff) is the same as before. 285 Here is how the fix affects timestamps in a timezone with UT 286 offset +01:23:45 (5025 seconds) and with a positive leap second at 287 1972-06-30 23:59:60 UTC (78796800): 288 289 time_t without the fix with the fix 290 78796800 1972-07-01 01:23:45 1972-07-01 01:23:45 (leap second) 291 78796801 1972-07-01 01:23:45 1972-07-01 01:23:46 292 ... 293 78796815 1972-07-01 01:23:59 1972-07-01 01:23:60 294 78796816 1972-07-01 01:24:00 1972-07-01 01:24:00 295 296 Fix an unlikely bug that caused 'localtime' etc. to misbehave if 297 civil time changes a few seconds before time_t wraps around, when 298 leap seconds are enabled. 299 300 Fix bug in zic -r; in some cases, the dummy time type after the 301 last time transition disagreed with the TZ string, contrary to 302 Internet RFC 8563 section 3.3. 303 304 Fix a bug with 'zic -r @X' when X is a negative leap second that 305 has a nonnegative correction. Without the fix, the output file 306 was truncated so that X appeared to be a positive leap second. 307 Fix a similar, even-less-likely bug when truncating at a positive 308 leap second that has a nonpositive correction. 309 310 zic -r now reports an error if given rolling leap seconds, as this 311 usage has never generally worked and is evidently unused. 312 313 zic now generates a POSIX-conforming TZ string for TZif files 314 where all-year DST is predicted for the indefinite future. 315 For example, for all-year Eastern Daylight Time, zic now generates 316 "XXX3EDT4,0/0,J365/23" where it previously generated 317 "EST5EDT,0/0,J365/25" or "". (Thanks to Michael Deckers for 318 noting the possibility of POSIX conformance.) 319 320 zic.c no longer requires sys/wait.h (thanks to spazmodius for 321 noting it wasn't needed). 322 323 When reading slim TZif files, zdump no longer mishandles leap 324 seconds on the rare platforms where time_t counts leap seconds, 325 fixing a bug introduced in 2014g. 326 327 zdump -v now outputs timestamps at boundaries of what localtime 328 and gmtime can represent, instead of the less-useful timestamps 329 one day after the minimum and one day before the maximum. 330 (Thanks to Arthur David Olson for prototype code, and to Manuela 331 Friedrich for debugging help.) 332 333 zdump's -c and -t options are now consistently inclusive for the 334 lower time bound and exclusive for the upper. Formerly they were 335 inconsistent. (Confusion noted by Martin Burnicki.) 336 337 Changes to build procedure 338 339 You can now compile with -DHAVE_MALLOC_ERRNO=0 to port to 340 non-POSIX hosts where malloc doesn't set errno. 341 (Problem reported by Jan Engelhardt.) 342 343 Changes to documentation 344 345 tzfile.5 better matches a draft successor to RFC 8536 346 <https://datatracker.ietf.org/doc/draft-murchison-rfc8536bis/01/>. 347 348 349 Release 2021a - 2021-01-24 10:54:57 -0800 350 351 Changes to future timestamps 352 353 South Sudan changes from +03 to +02 on 2021-02-01 at 00:00. 354 (Thanks to Steffen Thorsen.) 355 356 357 Release 2020f - 2020-12-29 00:17:46 -0800 358 359 Change to build procedure 360 361 'make rearguard_tarballs' no longer generates a bad rearguard.zi, 362 fixing a 2020e bug. (Problem reported by Deborah Goldsmith.) 363 364 365 Release 2020e - 2020-12-22 15:14:34 -0800 366 367 Briefly: 368 Volgograd switches to Moscow time on 2020-12-27 at 02:00. 369 370 Changes to future timestamps 371 372 Volgograd changes time zone from +04 to +03 on 2020-12-27 at 02:00. 373 (Thanks to Alexander Krivenyshev and Stepan Golosunov.) 374 375 Changes to past timestamps 376 377 Correct many pre-1986 transitions, fixing entries originally 378 derived from Shanks. The fixes include: 379 - Australia: several 1917 through 1971 transitions 380 - The Bahamas: several 1941 through 1945 transitions 381 - Bermuda: several 1917 through 1956 transitions 382 - Belize: several 1942 through 1968 transitions 383 - Ghana: several 1915 through 1956 transitions 384 - Israel and Palestine: several 1940 through 1985 transitions 385 - Kenya and adjacent: several 1908 through 1960 transitions 386 - Nigeria and adjacent: correcting LMT in Lagos, and several 1905 387 through 1919 transitions 388 - Seychelles: the introduction of standard time in 1907, not 1906 389 - Vanuatu: DST in 1973-1974, and a corrected 1984 transition 390 (Thanks to P Chan.) 391 392 Because of the Australia change, Australia/Currie (King Island) is 393 no longer needed, as it is identical to Australia/Hobart for all 394 timestamps since 1970 and was therefore created by mistake. 395 Australia/Currie has been moved to the 'backward' file and its 396 corrected data moved to the 'backzone' file. 397 398 Changes to past time zone abbreviations and DST flags 399 400 To better match legislation in Turks and Caicos, the 2015 shift to 401 year-round observance of -04 is now modeled as AST throughout before 402 returning to Eastern Time with US DST in 2018, rather than as 403 maintaining EDT until 2015-11-01. (Thanks to P Chan.) 404 405 Changes to documentation 406 407 The zic man page now documents zic's coalescing of transitions 408 when a zone falls back just before DST springs forward. 409 410 411 Release 2020d - 2020-10-21 11:24:13 -0700 412 413 Briefly: 414 Palestine ends DST earlier than predicted, on 2020-10-24. 415 416 Changes to past and future timestamps 417 418 Palestine ends DST on 2020-10-24 at 01:00, instead of 2020-10-31 419 as previously predicted (thanks to Sharef Mustafa.) Its 420 2019-10-26 fall-back was at 00:00, not 01:00 (thanks to Steffen 421 Thorsen.) Its 2015-10-23 transition was at 01:00 not 00:00, and 422 its spring 2020 transition was on March 28 at 00:00, not March 27 423 (thanks to Pierre Cashon.) This affects Asia/Gaza and 424 Asia/Hebron. Assume future spring and fall transitions will be on 425 the Saturday preceding the last Sunday of March and October, 426 respectively. 427 428 429 Release 2020c - 2020-10-16 11:15:53 -0700 430 431 Briefly: 432 Fiji starts DST later than usual, on 2020-12-20. 433 434 Changes to future timestamps 435 436 Fiji will start DST on 2020-12-20, instead of 2020-11-08 as 437 previously predicted. DST will still end on 2021-01-17. 438 (Thanks to Raymond Kumar and Alan Mintz.) Assume for now that 439 the later-than-usual start date is a one-time departure from the 440 recent pattern. 441 442 Changes to build procedure 443 444 Rearguard tarballs now contain an empty file pacificnew. 445 Some older downstream software expects this file to exist. 446 (Problem reported by Mike Cullinan.) 447 448 449 Release 2020b - 2020-10-06 18:35:04 -0700 450 451 Briefly: 452 Revised predictions for Morocco's changes starting in 2023. 453 Canada's Yukon changes to -07 on 2020-11-01, not 2020-03-08. 454 Macquarie Island has stayed in sync with Tasmania since 2011. 455 Casey, Antarctica is at +08 in winter and +11 in summer. 456 zic no longer supports -y, nor the TYPE field of Rules. 457 458 Changes to future timestamps 459 460 Morocco's spring-forward after Ramadan is now predicted to occur 461 no sooner than two days after Ramadan, instead of one day. 462 (Thanks to Milamber.) The first altered prediction is for 2023, 463 now predicted to spring-forward on April 30 instead of April 23. 464 465 Changes to past and future timestamps 466 467 Casey Station, Antarctica has been using +08 in winter and +11 in 468 summer since 2018. The most recent transition from +08 to +11 was 469 2020-10-04 00:01. Also, Macquarie Island has been staying in 470 sync with Tasmania since 2011. (Thanks to Steffen Thorsen.) 471 472 Changes to past and future time zone abbreviations and DST flags 473 474 Canada's Yukon, represented by America/Whitehorse and 475 America/Dawson, changes its time zone rules from -08/-07 to 476 permanent -07 on 2020-11-01, not on 2020-03-08 as 2020a had it. 477 This change affects only the time zone abbreviation (MST vs PDT) 478 and daylight saving flag for the period between the two dates. 479 (Thanks to Andrew G. Smith.) 480 481 Changes to past timestamps 482 483 Correct several transitions for Hungary for 1918/1983. 484 For example, the 1983-09-25 fall-back was at 01:00, not 03:00. 485 (Thanks to Gza Nyry.) Also, the 1890 transition to standard 486 time was on 11-01, not 10-01 (thanks to Michael Deckers). 487 488 The 1891 French transition was on March 16, not March 15. The 489 1911-03-11 French transition was at midnight, not a minute later. 490 Monaco's transitions were on 1892-06-01 and 1911-03-29, not 491 1891-03-15 and 1911-03-11. (Thanks to Michael Deckers.) 492 493 Changes to code 494 495 Support for zic's long-obsolete '-y YEARISTYPE' option has been 496 removed and, with it, so has support for the TYPE field in Rule 497 lines, which is now reserved for compatibility with earlier zic. 498 These features were previously deprecated in release 2015f. 499 (Thanks to Tim Parenti.) 500 501 zic now defaults to '-b slim' instead of to '-b fat'. 502 503 zic's new '-l -' and '-p -' options uninstall any existing 504 localtime and posixrules files, respectively. 505 506 The undocumented and ineffective tzsetwall function has been 507 removed. 508 509 Changes to build procedure 510 511 The Makefile now defaults POSIXRULES to '-', so the posixrules 512 feature (obsolete as of 2019b) is no longer installed by default. 513 514 Changes to documentation and commentary 515 516 The long-obsolete files pacificnew, systemv, and yearistype.sh have 517 been removed from the distribution. (Thanks to Tim Parenti.) 518 519 520 Release 2020a - 2020-04-23 16:03:47 -0700 521 522 Briefly: 523 Morocco springs forward on 2020-05-31, not 2020-05-24. 524 Canada's Yukon advanced to -07 year-round on 2020-03-08. 525 America/Nuuk renamed from America/Godthab. 526 zic now supports expiration dates for leap second lists. 527 528 Changes to future timestamps 529 530 Morocco's second spring-forward transition in 2020 will be May 31, 531 not May 24 as predicted earlier. (Thanks to Semlali Naoufal.) 532 Adjust future-year predictions to use the first Sunday after the 533 day after Ramadan, not the first Sunday after Ramadan. 534 535 Canada's Yukon, represented by America/Whitehorse and 536 America/Dawson, advanced to -07 year-round, beginning with its 537 spring-forward transition on 2020-03-08, and will not fall back on 538 2020-11-01. Although a government press release calls this 539 "permanent Pacific Daylight Saving Time", we prefer MST for 540 consistency with nearby Dawson Creek, Creston, and Fort Nelson. 541 (Thanks to Tim Parenti.) 542 543 Changes to past timestamps 544 545 Shanghai observed DST in 1919. (Thanks to Phake Nick.) 546 547 Changes to timezone identifiers 548 549 To reflect current usage in English better, America/Godthab has 550 been renamed to America/Nuuk. A backwards-compatibility link 551 remains for the old name. 552 553 Changes to code 554 555 localtime.c no longer mishandles timestamps after the last 556 transition in a TZif file with leap seconds and with daylight 557 saving time transitions projected into the indefinite future. 558 For example, with TZ='America/Los_Angeles' with leap seconds, 559 zdump formerly reported a DST transition on 2038-03-14 560 from 01:59:32.999... to 02:59:33 instead of the correct transition 561 from 01:59:59.999... to 03:00:00. 562 563 zic -L now supports an Expires line in the leapseconds file, and 564 truncates the TZif output accordingly. This propagates leap 565 second expiration information into the TZif file, and avoids the 566 abovementioned localtime.c bug as well as similar bugs present in 567 many client implementations. If no Expires line is present, zic 568 -L instead truncates the TZif output based on the #expires comment 569 present in leapseconds files distributed by tzdb 2018f and later; 570 however, this usage is obsolescent. For now, the distributed 571 leapseconds file has an Expires line that is commented out, so 572 that the file can be fed to older versions of zic which ignore the 573 commented-out line. Future tzdb distributions are planned to 574 contain a leapseconds file with an Expires line. 575 576 The configuration macros HAVE_TZNAME and USG_COMPAT should now be 577 set to 1 if the system library supports the feature, and 2 if not. 578 As before, these macros are nonzero if tzcode should support the 579 feature, zero otherwise. 580 581 The configuration macro ALTZONE now has the same values with the 582 same meaning as HAVE_TZNAME and USG_COMPAT. 583 584 The code's defense against CRLF in leap-seconds.list is now 585 portable to POSIX awk. (Problem reported by Deborah Goldsmith.) 586 587 Although the undocumented tzsetwall function is not changed in 588 this release, it is now deprecated in preparation for removal in 589 future releases. Due to POSIX requirements, tzsetwall has not 590 worked for some time. Any code that uses it should instead use 591 tzalloc(NULL) or, if portability trumps thread-safety, should 592 unset the TZ environment variable. 593 594 Changes to commentary 595 596 The les-de-la-Madeleine and the Listuguj reserve are noted as 597 following America/Halifax, and comments about Yukon's "south" and 598 "north" have been corrected to say "east" and "west". (Thanks to 599 Jeffery Nichols.) 600 601 602 Release 2019c - 2019-09-11 08:59:48 -0700 603 604 Briefly: 605 Fiji observes DST from 2019-11-10 to 2020-01-12. 606 Norfolk Island starts observing Australian-style DST. 607 608 Changes to future timestamps 609 610 Fiji's next DST transitions will be 2019-11-10 and 2020-01-12 611 instead of 2019-11-03 and 2020-01-19. (Thanks to Raymond Kumar.) 612 Adjust future guesses accordingly. 613 614 Norfolk Island will observe Australian-style DST starting in 615 spring 2019. The first transition is on 2019-10-06. (Thanks to 616 Kyle Czech and Michael Deckers.) 617 618 Changes to past timestamps 619 620 Many corrections to time in Turkey from 1940 through 1985. 621 (Thanks to Oya Vula via Alois Treindl, and to Kvan Yazan.) 622 623 The Norfolk Island 1975-03-02 transition was at 02:00 standard 624 time, not 02:00 DST. (Thanks to Michael Deckers.) 625 626 South Korea observed DST from 1948 through 1951. Although this 627 info was supposed to appear in release 2014j, a typo inadvertently 628 suppressed the change. (Thanks to Alois Treindl.) 629 630 Detroit observed DST in 1967 and 1968 following the US DST rules, 631 except that its 1967 DST began on June 14 at 00:01. (Thanks to 632 Alois Treindl for pointing out that the old data entries were 633 probably wrong.) 634 635 Fix several errors in pre-1970 transitions in Perry County, IN. 636 (Thanks to Alois Treindl for pointing out the 1967/9 errors.) 637 638 Edmonton did not observe DST in 1967 or 1969. In 1946 Vancouver 639 ended DST on 09-29 not 10-13, and Vienna ended DST on 10-07 not 640 10-06. In 1945 Knigsberg (now Kaliningrad) switched from +01/+02 641 to +02/+03 on 04-10 not 01-01, and its +02/+03 is abbreviated 642 EET/EEST, not CET/CEST. (Thanks to Alois Treindl.) In 1946 643 Knigsberg switched to +03 on 04-07 not 01-01. 644 645 In 1946 Louisville switched from CST to CDT on 04-28 at 00:01, not 646 01-01 at 00:00. (Thanks to Alois Treindl and Michael Deckers.) 647 Also, it switched from CST to CDT on 1950-04-30, not 1947-04-27. 648 649 The 1892-05-01 transition in Brussels was at 00:17:30, not at noon. 650 (Thanks to Michael Deckers.) 651 652 Changes to past time zone abbreviations and DST flags 653 654 Hong Kong Winter Time, observed from 1941-10-01 to 1941-12-25, 655 is now flagged as DST and is abbreviated HKWT not HKT. 656 657 Changes to code 658 659 leapseconds.awk now relies only on its input data, rather than 660 also relying on its comments. (Inspired by code from Dennis 661 Ferguson and Chris Woodbury.) 662 663 The code now defends against CRLFs in leap-seconds.list. 664 (Thanks to Brian Inglis and Chris Woodbury.) 665 666 Changes to documentation and commentary 667 668 theory.html discusses leap seconds. (Thanks to Steve Summit.) 669 670 Nashville's newspapers dueled about the time of day in the 1950s. 671 (Thanks to John Seigenthaler.) 672 673 Liechtenstein observed Swiss DST in 1941/2. 674 (Thanks to Alois Treindl.) 675 676 677 Release 2019b - 2019-07-01 00:09:53 -0700 678 679 Briefly: 680 Brazil no longer observes DST. 681 'zic -b slim' outputs smaller TZif files; please try it out. 682 Palestine's 2019 spring-forward transition was on 03-29, not 03-30. 683 684 Changes to future timestamps 685 686 Brazil has canceled DST and will stay on standard time indefinitely. 687 (Thanks to Steffen Thorsen, Marcus Diniz, and Daniel Soares de 688 Oliveira.) 689 690 Predictions for Morocco now go through 2087 instead of 2037, to 691 work around a problem on newlib when using TZif files output by 692 zic 2019a or earlier. (Problem reported by David Gauchard.) 693 694 Changes to past and future timestamps 695 696 Palestine's 2019 spring transition was 03-29 at 00:00, not 03-30 697 at 01:00. (Thanks to Sharef Mustafa and Even Scharning.) Guess 698 future transitions to be March's last Friday at 00:00. 699 700 Changes to past timestamps 701 702 Hong Kong's 1941-06-15 spring-forward transition was at 03:00, not 703 03:30. Its 1945 transition from JST to HKT was on 11-18 at 02:00, 704 not 09-15 at 00:00. In 1946 its spring-forward transition was on 705 04-21 at 00:00, not the previous day at 03:30. From 1946 through 706 1952 its fall-back transitions occurred at 04:30, not at 03:30. 707 In 1947 its fall-back transition was on 11-30, not 12-30. 708 (Thanks to P Chan.) 709 710 Changes to past time zone abbreviations 711 712 Italy's 1866 transition to Rome Mean Time was on December 12, not 713 September 22. This affects only the time zone abbreviation for 714 Europe/Rome between those dates. (Thanks to Stephen Trainor and 715 Luigi Rosa.) 716 717 Changes affecting metadata only 718 719 Add info about the Crimea situation in zone1970.tab and zone.tab. 720 (Problem reported by Serhii Demediuk.) 721 722 Changes to code 723 724 zic's new -b option supports a way to control data bloat and to 725 test for year-2038 bugs in software that reads TZif files. 726 'zic -b fat' and 'zic -b slim' generate larger and smaller output; 727 for example, changing from fat to slim shrinks the Europe/London 728 file from 3648 to 1599 bytes, saving about 56%. Fat and slim 729 files represent the same set of timestamps and use the same TZif 730 format as documented in tzfile(5) and in Internet RFC 8536. 731 Fat format attempts to work around bugs or incompatibilities in 732 older software, notably software that mishandles 64-bit TZif data 733 or uses obsolete TZ strings like "EET-2EEST" that lack DST rules. 734 Slim format is more efficient and does not work around 64-bit bugs 735 or obsolete TZ strings. Currently zic defaults to fat format 736 unless you compile with -DZIC_BLOAT_DEFAULT=\"slim\"; this 737 out-of-the-box default is intended to change in future releases 738 as the buggy software often mishandles timestamps anyway. 739 740 zic no longer treats a set of rules ending in 2037 specially. 741 Previously, zic assumed that such a ruleset meant that future 742 timestamps could not be predicted, and therefore omitted a 743 POSIX-like TZ string in the TZif output. The old behavior is no 744 longer needed for current tzdata, and caused problems with newlib 745 when used with older tzdata (reported by David Gauchard). 746 747 zic no longer generates some artifact transitions. For example, 748 Europe/London no longer has a no-op transition in January 1996. 749 750 Changes to build procedure 751 752 tzdata.zi now assumes zic 2017c or later. This shrinks tzdata.zi 753 by a percent or so. 754 755 Changes to documentation and commentary 756 757 The Makefile now documents the POSIXRULES macro as being obsolete, 758 and similarly, zic's -p POSIXRULES option is now documented as 759 being obsolete. Although the POSIXRULES feature still exists and 760 works as before, in practice it is rarely used for its intended 761 purpose, and it does not work either in the default reference 762 implementation (for timestamps after 2037) or in common 763 implementations such as GNU/Linux (for contemporary timestamps). 764 Since POSIXRULES was designed primarily as a temporary transition 765 facility for System V platforms that died off decades ago, it is 766 being decommissioned rather than institutionalized. 767 768 New info on Bonin Islands and Marcus (thanks to Wakaba and Phake Nick). 769 770 771 Release 2019a - 2019-03-25 22:01:33 -0700 772 773 Briefly: 774 Palestine "springs forward" on 2019-03-30 instead of 2019-03-23. 775 Metlakatla "fell back" to rejoin Alaska Time on 2019-01-20 at 02:00. 776 777 Changes to past and future timestamps 778 779 Palestine will not start DST until 2019-03-30, instead of 2019-03-23 as 780 previously predicted. Adjust our prediction by guessing that spring 781 transitions will be between 24 and 30 March, which matches recent practice 782 since 2016. (Thanks to Even Scharning and Tim Parenti.) 783 784 Metlakatla ended its observance of Pacific standard time, 785 rejoining Alaska Time, on 2019-01-20 at 02:00. (Thanks to Ryan 786 Stanley and Tim Parenti.) 787 788 Changes to past timestamps 789 790 Israel observed DST in 1980 (08-02/09-13) and 1984 (05-05/08-25). 791 (Thanks to Alois Treindl and Isaac Starkman.) 792 793 Changes to time zone abbreviations 794 795 Etc/UCT is now a backward-compatibility link to Etc/UTC, instead 796 of being a separate zone that generates the abbreviation "UCT", 797 which nowadays is typically a typo. (Problem reported by Isiah 798 Meadows.) 799 800 Changes to code 801 802 zic now has an -r option to limit the time range of output data. 803 For example, 'zic -r @1000000000' limits the output data to 804 timestamps starting 1000000000 seconds after the Epoch. 805 This helps shrink output size and can be useful for applications 806 not needing the full timestamp history, such as TZDIST truncation; 807 see Internet RFC 8536 section 5.1. (Inspired by a feature request 808 from Christopher Wong, helped along by bug reports from Wong and 809 from Tim Parenti.) 810 811 Changes to documentation 812 813 Mention Internet RFC 8536 (February 2019), which documents TZif. 814 815 tz-link.html now cites tzdata-meta 816 <https://tzdata-meta.timtimeonline.com/>. 817 818 819 Release 2018i - 2018-12-30 11:05:43 -0800 820 821 Briefly: 822 So Tom and Prncipe switches from +01 to +00 on 2019-01-01. 823 824 Changes to future timestamps 825 826 Due to a change in government, So Tom and Prncipe switches back 827 from +01 to +00 on 2019-01-01 at 02:00. (Thanks to Vadim 828 Nasardinov and Michael Deckers.) 829 830 831 Release 2018h - 2018-12-23 17:59:32 -0800 832 833 Briefly: 834 Qyzylorda, Kazakhstan moved from +06 to +05 on 2018-12-21. 835 New zone Asia/Qostanay because Qostanay, Kazakhstan didn't move. 836 Metlakatla, Alaska observes PST this winter only. 837 Guess Morocco will continue to adjust clocks around Ramadan. 838 Add predictions for Iran from 2038 through 2090. 839 840 Changes to future timestamps 841 842 Guess that Morocco will continue to fall back just before and 843 spring forward just after Ramadan, the practice since 2012. 844 (Thanks to Maamar Abdelkader.) This means Morocco will observe 845 negative DST during Ramadan in main and vanguard formats, and in 846 rearguard format it stays in the +00 timezone and observes 847 ordinary DST in all months other than Ramadan. As before, extend 848 this guesswork to the year 2037. As a consequence, Morocco is 849 scheduled to observe three DST transitions in some Gregorian years 850 (e.g., 2033) due to the mismatch between the Gregorian and Islamic 851 calendars. 852 853 The table of exact transitions for Iranian DST has been extended. 854 It formerly cut off before the year 2038 in a nod to 32-bit time_t. 855 It now cuts off before 2091 as there is doubt about how the Persian 856 calendar will treat 2091. This change predicts DST transitions in 857 2038-9, 2042-3, and 2046-7 to occur one day later than previously 858 predicted. As before, post-cutoff transitions are approximated. 859 860 Changes to past and future timestamps 861 862 Qyzylorda (aka Kyzylorda) oblast in Kazakhstan moved from +06 to 863 +05 on 2018-12-21. This is a zone split as Qostanay (aka 864 Kostanay) did not switch, so create a zone Asia/Qostanay. 865 866 Metlakatla moved from Alaska to Pacific standard time on 2018-11-04. 867 It did not change clocks that day and remains on -08 this winter. 868 (Thanks to Ryan Stanley.) It will revert to the usual Alaska 869 rules next spring, so this change affects only timestamps 870 from 2018-11-04 through 2019-03-10. 871 872 Change to past timestamps 873 874 Kwajalein's 1993-08-20 transition from -12 to +12 was at 24:00, 875 not 00:00. I transcribed the time incorrectly from Shanks. 876 (Thanks to Phake Nick.) 877 878 Nauru's 1979 transition was on 02-10 at 02:00, not 05-01 at 00:00. 879 (Thanks to Phake Nick.) 880 881 Guam observed DST irregularly from 1959 through 1977. 882 (Thanks to Phake Nick.) 883 884 Hong Kong observed DST in 1941 starting 06-15 (not 04-01), then on 885 10-01 changed standard time to +08:30 (not +08). Its transition 886 back to +08 after WWII was on 1945-09-15, not the previous day. 887 Its 1904-10-30 change took effect at 01:00 +08 (not 00:00 LMT). 888 (Thanks to Phake Nick, Steve Allen, and Joseph Myers.) Also, 889 its 1952 fallback was on 11-02 (not 10-25). 890 891 This release contains many changes to timestamps before 1946 due 892 to Japanese possession or occupation of Pacific/Chuuk, 893 Pacific/Guam, Pacific/Kosrae, Pacific/Kwajalein, Pacific/Majuro, 894 Pacific/Nauru, Pacific/Palau, and Pacific/Pohnpei. 895 (Thanks to Phake Nick.) 896 897 Assume that the Spanish East Indies was like the Philippines and 898 observed American time until the end of 1844. This affects 899 Pacific/Chuuk, Pacific/Kosrae, Pacific/Palau, and Pacific/Pohnpei. 900 901 Changes to past tm_isdst flags 902 903 For the recent Morocco change, the tm_isdst flag should be 1 from 904 2018-10-27 00:00 to 2018-10-28 03:00. (Thanks to Michael Deckers.) 905 Give a URL to the official decree. (Thanks to Matt Johnson.) 906 907 908 Release 2018g - 2018-10-26 22:22:45 -0700 909 910 Briefly: 911 Morocco switches to permanent +01 on 2018-10-28. 912 913 Changes to future timestamps 914 915 Morocco switches from +00/+01 to permanent +01 effective 2018-10-28, 916 so its clocks will not fall back as previously scheduled. 917 (Thanks to Mohamed Essedik Najd and Brian Inglis.) 918 919 Changes to code 920 921 When generating TZif files with leap seconds, zic no longer uses a 922 format that trips up older 32-bit clients, fixing a bug introduced 923 in 2018f. (Reported by Daniel Fischer.) Also, the zic workaround 924 for QTBUG-53071 now also works for TZif files with leap seconds. 925 926 The translator to rearguard format now rewrites the line 927 "Rule Japan 1948 1951 - Sep Sat>=8 25:00 0 S" to 928 "Rule Japan 1948 1951 - Sep Sun>=9 1:00 0 S". 929 This caters to zic before 2007 and to Oracle TZUpdater 2.2.0 930 and earlier. (Reported by Christos Zoulas.) 931 932 Changes to past time zone abbreviations 933 934 Change HDT to HWT/HPT for WWII-era abbreviations in Hawaii. 935 This reverts to 2011h, as the abbreviation change in 2011i was 936 likely inadvertent. 937 938 Changes to documentation 939 940 tzfile.5 has new sections on interoperability issues. 941 942 943 Release 2018f - 2018-10-18 00:14:18 -0700 944 945 Briefly: 946 Volgograd moves from +03 to +04 on 2018-10-28. 947 Fiji ends DST 2019-01-13, not 2019-01-20. 948 Most of Chile changes DST dates, effective 2019-04-06. 949 950 Changes to future timestamps 951 952 Volgograd moves from +03 to +04 on 2018-10-28 at 02:00. 953 (Thanks to Alexander Fetisov and Stepan Golosunov.) 954 955 Fiji ends DST 2019-01-13 instead of the 2019-01-20 previously 956 predicted. (Thanks to Raymond Kumar.) Adjust future predictions 957 accordingly. 958 959 Most of Chile will end DST on the first Saturday in April at 24:00 mainland 960 time, and resume DST on the first Saturday in September at 24:00 mainland 961 time. The changes are effective from 2019-04-06, and do not affect the 962 Magallanes region modeled by America/Punta_Arenas. (Thanks to Juan Correa 963 and Tim Parenti.) Adjust future predictions accordingly. 964 965 Changes to past timestamps 966 967 The 2018-05-05 North Korea 30-minute time zone change took place 968 at 23:30 the previous day, not at 00:00 that day. 969 970 China's 1988 spring-forward transition was on April 17, not 971 April 10. Its DST transitions in 1986/91 were at 02:00, not 00:00. 972 (Thanks to P Chan.) 973 974 Fix several issues for Macau before 1992. Macau's pre-1904 LMT 975 was off by 10 s. Macau switched to +08 in 1904 not 1912, and 976 temporarily switched to +09/+10 during World War II. Macau 977 observed DST in 1942/79, not 1961/80, and there were several 978 errors for transition times and dates. (Thanks to P Chan.) 979 980 The 1948-1951 fallback transitions in Japan were at 25:00 on 981 September's second Saturday, not at 24:00. (Thanks to Phake Nick.) 982 zic turns this into 01:00 on the day after September's second 983 Saturday, which is the best that POSIX or C platforms can do. 984 985 Incorporate 1940-1949 Asia/Shanghai DST transitions from a 2014 986 paper by Li Yu, replacing more-questionable data from Shanks. 987 988 Changes to time zone abbreviations 989 990 Use "PST" and "PDT" for Philippine time. (Thanks to Paul Goyette.) 991 992 Changes to code 993 994 zic now always generates TZif files where time type 0 is used for 995 timestamps before the first transition. This simplifies the 996 reading of TZif files and should not affect behavior of existing 997 TZif readers because the same set of time types is used; only 998 their internal indexes may have changed. This affects only the 999 legacy zones EST5EDT, CST6CDT, MST7MDT, PST8PDT, CET, MET, and 1000 EET, which previously used nonzero types for these timestamps. 1001 1002 Because of the type 0 change, zic no longer outputs a dummy 1003 transition at time -2**59 (before the Big Bang), as clients should 1004 no longer need this to handle historical timestamps correctly. 1005 This reverts a change introduced in 2013d and shrinks most TZif 1006 files by a few bytes. 1007 1008 zic now supports negative time-of-day in Rule and Leap lines, e.g., 1009 "Rule X min max - Apr lastSun -6:00 1:00 -" means the transition 1010 occurs at 18:00 on the Saturday before the last Sunday in April. 1011 This behavior was documented in 2018a but the code did not 1012 entirely match the documentation. 1013 1014 localtime.c no longer requires at least one time type in TZif 1015 files that lack transitions or have a POSIX-style TZ string. This 1016 future-proofs the code against possible future extensions to the 1017 format that would allow TZif files with POSIX-style TZ strings and 1018 without transitions or time types. 1019 1020 A read-access subscript error in localtime.c has been fixed. 1021 It could occur only in TZif files with timecnt == 0, something that 1022 does not happen in practice now but could happen in future versions. 1023 1024 localtime.c no longer ignores TZif POSIX-style TZ strings that 1025 specify only standard time. Instead, these TZ strings now 1026 override the default time type for timestamps after the last 1027 transition (or for all timestamps if there are no transitions), 1028 just as DST strings specifying DST have always done. 1029 1030 leapseconds.awk now outputs "#updated" and "#expires" comments, 1031 and supports leap seconds at the ends of months other than June 1032 and December. (Inspired by suggestions from Chris Woodbury.) 1033 1034 Changes to documentation 1035 1036 New restrictions: A Rule name must start with a character that 1037 is neither an ASCII digit nor "-" nor "+", and an unquoted name 1038 should not use characters in the set "!$%&'()*,/:;<=>?@[\]^`{|}~". 1039 The latter restriction makes room for future extensions (a 1040 possibility noted by Tom Lane). 1041 1042 tzfile.5 now documents what time types apply before the first and 1043 after the last transition, if any. 1044 1045 Documentation now uses the spelling "timezone" for a TZ setting 1046 that determines timestamp history, and "time zone" for a 1047 geographic region currently sharing the same standard time. 1048 1049 The name "TZif" is now used for the tz binary data format. 1050 1051 tz-link.htm now mentions the A0 TimeZone Migration utilities. 1052 (Thanks to Aldrin Martoq for the link.) 1053 1054 Changes to build procedure 1055 1056 New 'make' target 'rearguard_tarballs' to build the rearguard 1057 tarball only. This is a convenience on platforms that lack lzip 1058 if you want to build the rearguard tarball. (Problem reported by 1059 Deborah Goldsmith.) 1060 1061 tzdata.zi is now more stable from release to release. (Problem 1062 noted by Tom Lane.) It is also a bit shorter. 1063 1064 tzdata.zi now can contain comment lines documenting configuration 1065 information, such as which data format was selected, which input 1066 files were used, and how leap seconds are treated. (Problems 1067 noted by Lester Caine and Brian Inglis.) If the Makefile defaults 1068 are used these comment lines are absent, for backward 1069 compatibility. A redistributor intending to alter its copy of the 1070 files should also append "-LABEL" to the 'version' file's first 1071 line, where "LABEL" identifies the redistributor's change. 1072 1073 1074 Release 2018e - 2018-05-01 23:42:51 -0700 1075 1076 Briefly: 1077 1078 North Korea switches back to +09 on 2018-05-05. 1079 The main format uses negative DST again, for Ireland etc. 1080 'make tarballs' now also builds a rearguard tarball. 1081 New 's' and 'd' suffixes in SAVE columns of Rule and Zone lines. 1082 1083 Changes to past and future timestamps 1084 1085 North Korea switches back from +0830 to +09 on 2018-05-05. 1086 (Thanks to Kang Seonghoon, Arthur David Olson, Seo Sanghyeon, 1087 and Tim Parenti.) 1088 1089 Bring back the negative-DST changes of 2018a, except be more 1090 compatible with data parsers that do not support negative DST. 1091 Also, this now affects historical timestamps in Namibia and the 1092 former Czechoslovakia, not just Ireland. The main format now uses 1093 negative DST to model timestamps in Europe/Dublin (from 1971 on), 1094 Europe/Prague (1946/7), and Africa/Windhoek (1994/2017). This 1095 does not affect UT offsets, only time zone abbreviations and the 1096 tm_isdst flag. Also, this does not affect rearguard or vanguard 1097 formats; effectively the main format now uses vanguard instead of 1098 rearguard format. Data parsers that do not support negative DST 1099 can still use data from the rearguard tarball described below. 1100 1101 Changes to build procedure 1102 1103 The command 'make tarballs' now also builds the tarball 1104 tzdataVERSION-rearguard.tar.gz, which is like tzdataVERSION.tar.gz 1105 except that it uses rearguard format intended for trailing-edge 1106 data parsers. 1107 1108 Changes to data format and to code 1109 1110 The SAVE column of Rule and Zone lines can now have an 's' or 'd' 1111 suffix, which specifies whether the adjusted time is standard time 1112 or daylight saving time. If no suffix is given, daylight saving 1113 time is used if and only if the SAVE column is nonzero; this is 1114 the longstanding behavior. Although this new feature is not used 1115 in tzdata, it could be used to specify the legal time in Namibia 1116 1994-2017, as opposed to the popular time (see below). 1117 1118 Changes to past timestamps 1119 1120 From 1994 through 2017 Namibia observed DST in winter, not summer. 1121 That is, it used negative DST, as Ireland still does. This change 1122 does not affect UTC offsets; it affects only the tm_isdst flag and 1123 the abbreviation used during summer, which is now CAT, not WAST. 1124 Although (as noted by Michael Deckers) summer and winter time were 1125 both simply called "standard time" in Namibian law, in common 1126 practice winter time was considered to be DST (as noted by Stephen 1127 Colebourne). The full effect of this change is only in vanguard 1128 and main format; in rearguard format, the tm_isdst flag is still 1129 zero in winter and nonzero in summer. 1130 1131 In 1946/7 Czechoslovakia also observed negative DST in winter. 1132 The full effect of this change is only in vanguard and main 1133 formats; in rearguard format, it is modeled as plain GMT without 1134 daylight saving. Also, the dates of some 1944/5 DST transitions 1135 in Czechoslovakia have been changed. 1136 1137 1138 Release 2018d - 2018-03-22 07:05:46 -0700 1139 1140 Briefly: 1141 1142 Palestine starts DST a week earlier in 2018. 1143 Add support for vanguard and rearguard data consumers. 1144 Add subsecond precision to source data format, though not to data. 1145 1146 Changes to future timestamps 1147 1148 In 2018, Palestine starts DST on March 24, not March 31. 1149 Adjust future predictions accordingly. (Thanks to Sharef Mustafa.) 1150 1151 Changes to past and future timestamps 1152 1153 Casey Station in Antarctica changed from +11 to +08 on 2018-03-11 1154 at 04:00. (Thanks to Steffen Thorsen.) 1155 1156 Changes to past timestamps 1157 1158 Historical transitions for Uruguay, represented by 1159 America/Montevideo, have been updated per official legal documents, 1160 replacing previous data mainly originating from the inventions of 1161 Shanks & Pottenger. This has resulted in adjustments ranging from 1162 30 to 90 minutes in either direction over at least two dozen 1163 distinct periods ranging from one day to several years in length. 1164 A mere handful of pre-1991 transitions are unaffected; data since 1165 then has come from more reliable contemporaneous reporting. These 1166 changes affect various timestamps in 1920-1923, 1936, 1939, 1167 1942-1943, 1959, 1966-1970, 1972, 1974-1980, and 1988-1990. 1168 Additionally, Uruguay's pre-standard-time UT offset has been 1169 adjusted westward by 7 seconds, from UT-03:44:44 to UT-03:44:51, to 1170 match the location of the Observatory of the National Meteorological 1171 Institute in Montevideo. 1172 (Thanks to Jeremie Bonjour, Tim Parenti, and Michael Deckers.) 1173 1174 East Kiribati skipped New Year's Eve 1994, not New Year's Day 1995. 1175 (Thanks to Kerry Shetline.) 1176 1177 Fix the 1912-01-01 transition for Portugal and its colonies. 1178 This transition was at 00:00 according to the new UT offset, not 1179 according to the old one. Also assume that Cape Verde switched on 1180 the same date as the rest, not in 1907. This affects 1181 Africa/Bissau, Africa/Sao_Tome, Asia/Macau, Atlantic/Azores, 1182 Atlantic/Cape_Verde, Atlantic/Madeira, and Europe/Lisbon. 1183 (Thanks to Michael Deckers.) 1184 1185 Fix an off-by-1 error for pre-1913 timestamps in Jamaica and in 1186 Turks & Caicos. 1187 1188 Changes to past time zone abbreviations 1189 1190 MMT took effect in Uruguay from 1908-06-10, not 1898-06-28. There 1191 is no clock change associated with the transition. 1192 1193 Changes to build procedure 1194 1195 The new DATAFORM macro in the Makefile lets the installer choose 1196 among three source data formats. The idea is to lessen downstream 1197 disruption when data formats are improved. 1198 1199 * DATAFORM=vanguard installs from the latest, bleeding-edge 1200 format. DATAFORM=main (the default) installs from the format 1201 used in the 'africa' etc. files. DATAFORM=rearguard installs 1202 from a trailing-edge format. Eventually, elements of today's 1203 vanguard format should move to the main format, and similarly 1204 the main format's features should eventually move to the 1205 rearguard format. 1206 1207 * In the current version, the main and rearguard formats are 1208 identical and match that of 2018c, so this change does not 1209 affect default behavior. The vanguard format currently contains 1210 one feature not in the main format: negative SAVE values. This 1211 improves support for Ireland, which uses Irish Standard Time 1212 (IST, UTC+01) in summer and GMT (UTC) in winter. tzcode has 1213 supported negative SAVE values for decades, and this feature 1214 should move to the main format soon. However, it will not move 1215 to the rearguard format for quite some time because some 1216 downstream parsers do not support it. 1217 1218 * The build procedure constructs three files vanguard.zi, main.zi, 1219 and rearguard.zi, one for each format. Although the files 1220 represent essentially the same data, they may have minor 1221 discrepancies that users are not likely to notice. The files 1222 are intended for downstream data consumers and are not 1223 installed. Zoneinfo parsers that do not support negative SAVE values 1224 should start using rearguard.zi, so that they will be unaffected 1225 when the negative-DST feature moves from vanguard to main. 1226 Bleeding-edge Zoneinfo parsers that support the new features 1227 already can use vanguard.zi; in this respect, current tzcode is 1228 bleeding-edge. 1229 1230 The Makefile should now be safe for parallelized builds, and 'make 1231 -j to2050new.tzs' is now much faster on a multiprocessor host 1232 with GNU Make. 1233 1234 When built with -DSUPPRESS_TZDIR, the tzcode library no longer 1235 prepends TZDIR/ to file names that do not begin with '/'. This is 1236 not recommended for general use, due to its security implications. 1237 (From a suggestion by Manuela Friedrich.) 1238 1239 Changes to code 1240 1241 zic now accepts subsecond precision in expressions like 1242 00:19:32.13, which is approximately the legal time of the 1243 Netherlands from 1835 to 1937. However, because it is 1244 questionable whether the few recorded uses of non-integer offsets 1245 had subsecond precision in practice, there are no plans for tzdata 1246 to use this feature. (Thanks to Steve Allen for pointing out 1247 the limitations of historical data in this area.) 1248 1249 The code is a bit more portable to MS-Windows. Installers can 1250 compile with -DRESERVE_STD_EXT_IDS on MS-Windows platforms that 1251 reserve identifiers like 'localtime'. (Thanks to Manuela 1252 Friedrich.) 1253 1254 Changes to documentation and commentary 1255 1256 theory.html now outlines tzdb's extensions to POSIX's model for 1257 civil time, and has a section "POSIX features no longer needed" 1258 that lists POSIX API components that are now vestigial. 1259 (From suggestions by Steve Summit.) It also better distinguishes 1260 time zones from tz regions. (From a suggestion by Guy Harris.) 1261 1262 Commentary is now more consistent about using the phrase "daylight 1263 saving time", to match the C name tm_isdst. Daylight saving time 1264 need not occur in summer, and need not have a positive offset from 1265 standard time. 1266 1267 Commentary about historical transitions in Uruguay has been expanded 1268 with links to many relevant legal documents. 1269 (Thanks to Tim Parenti.) 1270 1271 Commentary now uses some non-ASCII characters with Unicode value 1272 less than U+0100, as they can be useful and should work even with 1273 older editors such as XEmacs. 1274 1275 1276 Release 2018c - 2018-01-22 23:00:44 -0800 1277 1278 Briefly: 1279 Revert Irish changes that relied on negative SAVE values. 1280 1281 Changes to tm_isdst 1282 1283 Revert the 2018a change to Europe/Dublin. As before, this change 1284 does not affect UT offsets or abbreviations; it affects only 1285 whether timestamps are considered to be standard time or 1286 daylight-saving time, as expressed in the tm_isdst flag of C's 1287 struct tm type. This reversion is intended to be a temporary 1288 workaround for problems discovered with downstream uses of 1289 releases 2018a and 2018b, which implemented Irish time by using 1290 negative SAVE values in the Eire rules of the 'europe' file. 1291 Although negative SAVE values have been part of tzcode for many 1292 years and are supported by many platforms, they were not 1293 documented before 2018a and ICU and OpenJDK do not currently 1294 support them. A mechanism to export data to platforms lacking 1295 support for negative DST is planned to be developed before the 1296 change is reapplied. (Problems reported by Deborah Goldsmith and 1297 Stephen Colebourne.) 1298 1299 Changes to past timestamps 1300 1301 Japanese DST transitions (1948-1951) were Sundays at 00:00, not 1302 Saturdays or Sundays at 02:00. (Thanks to Takayuki Nikai.) 1303 1304 Changes to build procedure 1305 1306 The build procedure now works around mawk 1.3.3's lack of support 1307 for character class expressions. (Problem reported by Ohyama.) 1308 1309 1310 Release 2018b - 2018-01-17 23:24:48 -0800 1311 1312 Briefly: 1313 Fix a packaging problem in tz2018a, which was missing 'pacificnew'. 1314 1315 Changes to build procedure 1316 1317 The distribution now contains the file 'pacificnew' again. 1318 This file was inadvertantly omitted in the 2018a distribution. 1319 (Problem reported by Matias Fonzo.) 1320 1321 1322 Release 2018a - 2018-01-12 22:29:21 -0800 1323 1324 Briefly: 1325 So Tom and Prncipe switched from +00 to +01. 1326 Brazil's DST will now start on November's first Sunday. 1327 Ireland's standard time is now in the summer, not the winter. 1328 Use Debian-style installation locations, instead of 4.3BSD-style. 1329 New zic option -t. 1330 1331 Changes to past and future timestamps 1332 1333 So Tom and Prncipe switched from +00 to +01 on 2018-01-01 at 1334 01:00. (Thanks to Steffen Thorsen and Michael Deckers.) 1335 1336 Changes to future timestamps 1337 1338 Starting in 2018 southern Brazil will begin DST on November's 1339 first Sunday instead of October's third Sunday. (Thanks to 1340 Steffen Thorsen.) 1341 1342 Changes to past timestamps 1343 1344 A discrepancy of 4 s in timestamps before 1931 in South Sudan has 1345 been corrected. The 'backzone' and 'zone.tab' files did not agree 1346 with the 'africa' and 'zone1970.tab' files. (Problem reported by 1347 Michael Deckers.) 1348 1349 The abbreviation invented for Bolivia Summer Time (1931-2) is now 1350 BST instead of BOST, to be more consistent with the convention 1351 used for Latvian Summer Time (1918-9) and for British Summer Time. 1352 1353 Changes to tm_isdst 1354 1355 Change Europe/Dublin so that it observes Irish Standard Time (UT 1356 +01) in summer and GMT (as negative daylight-saving) in winter, 1357 instead of observing standard time (GMT) in winter and Irish 1358 Summer Time (UT +01) in summer. This change does not affect UT 1359 offsets or abbreviations; it affects only whether timestamps are 1360 considered to be standard time or daylight-saving time, as 1361 expressed in the tm_isdst flag of C's struct tm type. 1362 (Discrepancy noted by Derick Rethans.) 1363 1364 Changes to build procedure 1365 1366 The default installation locations have been changed to mostly 1367 match Debian circa 2017, instead of being designed as an add-on to 1368 4.3BSD circa 1986. This affects the Makefile macros TOPDIR, 1369 TZDIR, MANDIR, and LIBDIR. New Makefile macros TZDEFAULT, USRDIR, 1370 USRSHAREDIR, BINDIR, ZDUMPDIR, and ZICDIR let installers tailor 1371 locations more precisely. (This responds to suggestions from 1372 Brian Inglis and from Steve Summit.) 1373 1374 The default installation procedure no longer creates the 1375 backward-compatibility link US/Pacific-New, which causes 1376 confusion during user setup (e.g., see Debian bug 815200). 1377 Use 'make BACKWARD="backward pacificnew"' to create the link 1378 anyway, for now. Eventually we plan to remove the link entirely. 1379 1380 tzdata.zi now contains a version-number comment. 1381 (Suggested by Tom Lane.) 1382 1383 The Makefile now quotes values like BACKWARD more carefully when 1384 passing them to the shell. (Problem reported by Zefram.) 1385 1386 Builders no longer need to specify -DHAVE_SNPRINTF on platforms 1387 that have snprintf and use pre-C99 compilers. (Problem reported 1388 by Jon Skeet.) 1389 1390 Changes to code 1391 1392 zic has a new option -t FILE that specifies the location of the 1393 file that determines local time when TZ is unset. The default for 1394 this location can be configured via the new TZDEFAULT makefile 1395 macro, which defaults to /etc/localtime. 1396 1397 Diagnostics and commentary now distinguish UT from UTC more 1398 carefully; see theory.html for more information about UT vs UTC. 1399 1400 zic has been ported to GCC 8's -Wstringop-truncation option. 1401 (Problem reported by Martin Sebor.) 1402 1403 Changes to documentation and commentary 1404 1405 The zic man page now documents the longstanding behavior that 1406 times and years can be out of the usual range, with negative times 1407 counting backwards from midnight and with year 0 preceding year 1. 1408 (Problem reported by Michael Deckers.) 1409 1410 The theory.html file now mentions the POSIX limit of six chars 1411 per abbreviation, and lists alphabetic abbreviations used. 1412 1413 The files tz-art.htm and tz-link.htm have been renamed to 1414 tz-art.html and tz-link.html, respectively, for consistency with 1415 other file names and to simplify web server configuration. 1416 1417 1418 Release 2017c - 2017-10-20 14:49:34 -0700 1419 1420 Briefly: 1421 Northern Cyprus switches from +03 to +02/+03 on 2017-10-29. 1422 Fiji ends DST 2018-01-14, not 2018-01-21. 1423 Namibia switches from +01/+02 to +02 on 2018-04-01. 1424 Sudan switches from +03 to +02 on 2017-11-01. 1425 Tonga likely switches from +13/+14 to +13 on 2017-11-05. 1426 Turks & Caicos switches from -04 to -05/-04 on 2018-11-04. 1427 A new file tzdata.zi now holds a small text copy of all data. 1428 The zic input format has been regularized slightly. 1429 1430 Changes to future timestamps 1431 1432 Northern Cyprus has decided to resume EU rules starting 1433 2017-10-29, thus reinstituting winter time. 1434 1435 Fiji ends DST 2018-01-14 instead of the 2018-01-21 previously 1436 predicted. (Thanks to Dominic Fok.) Adjust future predictions 1437 accordingly. 1438 1439 Namibia will switch from +01 with DST to +02 all year on 1440 2017-09-03 at 02:00. This affects UT offsets starting 2018-04-01 1441 at 02:00. (Thanks to Steffen Thorsen.) 1442 1443 Sudan will switch from +03 to +02 on 2017-11-01. (Thanks to Ahmed 1444 Atyya and Yahia Abdalla.) South Sudan is not switching, so 1445 Africa/Juba is no longer a link to Africa/Khartoum. 1446 1447 Tonga has likely ended its experiment with DST, and will not 1448 adjust its clocks on 2017-11-05. Although Tonga has not announced 1449 whether it will continue to observe DST, the IATA is assuming that 1450 it will not. (Thanks to David Wade.) 1451 1452 Turks & Caicos will switch from -04 all year to -05 with US DST on 1453 2018-03-11 at 03:00. This affects UT offsets starting 2018-11-04 1454 at 02:00. (Thanks to Steffen Thorsen.) 1455 1456 Changes to past timestamps 1457 1458 Namibia switched from +02 to +01 on 1994-03-21, not 1994-04-03. 1459 (Thanks to Arthur David Olson.) 1460 1461 Detroit did not observe DST in 1967. 1462 1463 Use railway time for Asia/Kolkata before 1941, by switching to 1464 Madras local time (UT +052110) in 1870, then to IST (UT +0530) in 1465 1906. Also, treat 1941-2's +0630 as DST, like 1942-5. 1466 1467 Europe/Dublin's 1946 and 1947 fallback transitions occurred at 1468 02:00 standard time, not 02:00 DST. (Thanks to Michael Deckers.) 1469 1470 Pacific/Apia and Pacific/Pago_Pago switched from Antipodean to 1471 American time in 1892, not 1879. (Thanks to Michael Deckers.) 1472 1473 Adjust the 1867 transition in Alaska to better reflect the 1474 historical record, by changing it to occur on 1867-10-18 at 15:30 1475 Sitka time rather than at the start of 1867-10-17 local time. 1476 Although strictly speaking this is accurate only for Sitka, 1477 the rest of Alaska's blanks need to be filled in somehow. 1478 1479 Fix off-by-one errors in UT offsets for Adak and Nome before 1867. 1480 (Thanks to Michael Deckers.) 1481 1482 Add 7 s to the UT offset in Asia/Yangon before 1920. 1483 1484 Changes to zone names 1485 1486 Remove Canada/East-Saskatchewan from the 'backward' file, as it 1487 exceeded the 14-character limit and was an unused misnomer anyway. 1488 1489 Changes to build procedure 1490 1491 To support applications that prefer to read time zone data in text 1492 form, two zic input files tzdata.zi and leapseconds are now 1493 installed by default. The commands 'zic tzdata.zi' and 'zic -L 1494 leapseconds tzdata.zi' can reproduce the tzdata binary files 1495 without and with leap seconds, respectively. To prevent these two 1496 new files from being installed, use 'make TZDATA_TEXT=', and to 1497 suppress leap seconds from the tzdata text installation, use 'make 1498 TZDATA_TEXT=tzdata.zi'. 1499 1500 'make BACKWARD=' now suppresses backward-compatibility names 1501 like 'US/Pacific' that are defined in the 'backward' and 1502 'pacificnew' files. 1503 1504 'make check' now works on systems that lack a UTF-8 locale, 1505 or that lack the nsgmls program. Set UTF8_LOCALE to configure 1506 the name of a UTF-8 locale, if you have one. 1507 1508 Y2K runtime checks are no longer enabled by default. Add 1509 -DDEPRECATE_TWO_DIGIT_YEARS to CFLAGS to enable them, instead of 1510 adding -DNO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU 1511 to disable them. (New name suggested by Brian Inglis.) 1512 1513 The build procedure for zdump now works on AIX 7.1. 1514 (Problem reported by Kees Dekker.) 1515 1516 Changes to code 1517 1518 zic and the reference runtime now reject multiple leap seconds 1519 within 28 days of each other, or leap seconds before the Epoch. 1520 As a result, support for double leap seconds, which was 1521 obsolescent and undocumented, has been removed. Double leap 1522 seconds were an error in the C89 standard; they have never existed 1523 in civil timekeeping. (Thanks to Robert Elz and Bradley White for 1524 noticing glitches in the code that uncovered this problem.) 1525 1526 zic now warns about use of the obsolescent and undocumented -y 1527 option, and about use of the obsolescent TYPE field of Rule lines. 1528 1529 zic now allows unambiguous abbreviations like "Sa" and "Su" for 1530 weekdays; formerly it rejected them due to a bug. Conversely, zic 1531 no longer considers non-prefixes to be abbreviations; for example, 1532 it no longer accepts "lF" as an abbreviation for "lastFriday". 1533 Also, zic warns about the undocumented usage with a "last-" 1534 prefix, e.g., "last-Fri". 1535 1536 Similarly, zic now accepts the unambiguous abbreviation "L" for 1537 "Link" in ordinary context and for "Leap" in leap-second context. 1538 Conversely, zic no longer accepts non-prefixes such as "La" as 1539 abbreviations for words like "Leap". 1540 1541 zic no longer accepts leap second lines in ordinary input, or 1542 ordinary lines in leap second input. Formerly, zic sometimes 1543 warned about this undocumented usage and handled it incorrectly. 1544 1545 The new macro HAVE_TZNAME governs whether the tzname external 1546 variable is exported, instead of USG_COMPAT. USG_COMPAT now 1547 governs only the external variables "timezone" and "daylight". 1548 This change is needed because the three variables are not in the 1549 same category: although POSIX requires tzname, it specifies the 1550 other two variables as optional. Also, USG_COMPAT is now 1 or 0: 1551 if not defined, the code attempts to guess it from other macros. 1552 1553 localtime.c and difftime.c no longer require stdio.h, and .c files 1554 other than zic.c no longer require sys/wait.h. 1555 1556 zdump.c no longer assumes snprintf. (Reported by Jonathan Leffler.) 1557 1558 Calculation of time_t extrema works around a bug in GCC 4.8.4 1559 (Reported by Stan Shebs and Joseph Myers.) 1560 1561 zic.c no longer mistranslates formats of line numbers in non-English 1562 locales. (Problem reported by Benno Schulenberg.) 1563 1564 Several minor changes have been made to the code to make it a 1565 bit easier to port to MS-Windows and Solaris. (Thanks to Kees 1566 Dekker for reporting the problems.) 1567 1568 Changes to documentation and commentary 1569 1570 The two new files 'theory.html' and 'calendars' contain the 1571 contents of the removed file 'Theory'. The goal is to document 1572 tzdb theory more accessibly. 1573 1574 The zic man page now documents abbreviation rules. 1575 1576 tz-link.htm now covers how to apply tzdata changes to clients. 1577 (Thanks to Jorge Fbregas for the AIX link.) It also mentions MySQL. 1578 1579 The leap-seconds.list URL has been updated to something that is 1580 more reliable for tzdb. (Thanks to Tim Parenti and Brian Inglis.) 1581 1582 Release 2017b - 2017-03-17 07:30:38 -0700 1583 1584 Briefly: Haiti has resumed DST. 1585 1586 Changes to past and future timestamps 1587 1588 Haiti resumed observance of DST in 2017. (Thanks to Steffen Thorsen.) 1589 1590 Changes to past timestamps 1591 1592 Liberia changed from -004430 to +00 on 1972-01-07, not 1972-05-01. 1593 1594 Use "MMT" to abbreviate Liberia's time zone before 1972, as "-004430" 1595 is one byte over the POSIX limit. (Problem reported by Derick Rethans.) 1596 1597 Changes to code 1598 1599 The reference localtime implementation now falls back on the 1600 current US daylight-saving transition rules rather than the 1601 1987-2006 rules. This fallback occurs only when (1) the TZ 1602 environment variable has a value like "AST4ADT" that asks 1603 for daylight saving time but does not specify the rules, (2) there 1604 is no file by that name, and (3) the TZDEFRULES file cannot be 1605 loaded. (Thanks to Tom Lane.) 1606 1607 1608 Release 2017a - 2017-02-28 00:05:36 -0800 1609 1610 Briefly: Southern Chile moves from -04/-03 to -03, and Mongolia 1611 discontinues DST. 1612 1613 Changes to future timestamps 1614 1615 Mongolia no longer observes DST. (Thanks to Ganbold Tsagaankhuu.) 1616 1617 Chile's Region of Magallanes moves from -04/-03 to -03 year-round. 1618 Its clocks diverge from America/Santiago starting 2017-05-13 at 1619 23:00, hiving off a new zone America/Punta_Arenas. Although the 1620 Chilean government says this change expires in May 2019, for now 1621 assume it's permanent. (Thanks to Juan Correa and Deborah 1622 Goldsmith.) This also affects Antarctica/Palmer. 1623 1624 Changes to past timestamps 1625 1626 Fix many entries for historical timestamps for Europe/Madrid 1627 before 1979, to agree with tables compiled by Pere Planesas of the 1628 National Astronomical Observatory of Spain. As a side effect, 1629 this changes some timestamps for Africa/Ceuta before 1929, which 1630 are probably guesswork anyway. (Thanks to Steve Allen and 1631 Pierpaolo Bernardi for the heads-ups, and to Michael Deckers for 1632 correcting the 1901 transition.) 1633 1634 Ecuador observed DST from 1992-11-28 to 1993-02-05. 1635 (Thanks to Alois Treindl.) 1636 1637 Asia/Atyrau and Asia/Oral were at +03 (not +04) before 1930-06-21. 1638 (Thanks to Stepan Golosunov.) 1639 1640 Changes to past and future time zone abbreviations 1641 1642 Switch to numeric time zone abbreviations for South America, as 1643 part of the ongoing project of removing invented abbreviations. 1644 This avoids the need to invent an abbreviation for the new Chilean 1645 new zone. Similarly, switch from invented to numeric time zone 1646 abbreviations for Afghanistan, American Samoa, the Azores, 1647 Bangladesh, Bhutan, the British Indian Ocean Territory, Brunei, 1648 Cape Verde, Chatham Is, Christmas I, Cocos (Keeling) Is, Cook Is, 1649 Dubai, East Timor, Eucla, Fiji, French Polynesia, Greenland, 1650 Indochina, Iran, Iraq, Kiribati, Lord Howe, Macquarie, Malaysia, 1651 the Maldives, Marshall Is, Mauritius, Micronesia, Mongolia, 1652 Myanmar, Nauru, Nepal, New Caledonia, Niue, Norfolk I, Palau, 1653 Papua New Guinea, the Philippines, Pitcairn, Qatar, Runion, St 1654 Pierre & Miquelon, Samoa, Saudi Arabia, Seychelles, Singapore, 1655 Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, Wallis & Futuna, and 1656 Xinjiang; for 20-minute daylight saving time in Ghana before 1943; 1657 for half-hour daylight saving time in Belize before 1944 and in 1658 the Dominican Republic before 1975; and for Canary Islands before 1659 1946, for Guinea-Bissau before 1975, for Iceland before 1969, for 1660 Indian Summer Time before 1942, for Indonesia before around 1964, 1661 for Kenya before 1960, for Liberia before 1973, for Madeira before 1662 1967, for Namibia before 1943, for the Netherlands in 1937-9, for 1663 Pakistan before 1971, for Western Sahara before 1977, and for 1664 Zaporozhye in 1880-1924. 1665 1666 For Alaska time from 1900 through 1967, instead of "CAT" use the 1667 abbreviation "AST", the abbreviation commonly used at the time 1668 (Atlantic Standard Time had not been standardized yet). Use "AWT" 1669 and "APT" instead of the invented abbreviations "CAWT" and "CAPT". 1670 1671 Use "CST" and "CDT" instead of invented abbreviations for Macau 1672 before 1999 and Taiwan before 1938, and use "JST" instead of the 1673 invented abbreviation "JCST" for Japan and Korea before 1938. 1674 1675 Change to database entry category 1676 1677 Move the Pacific/Johnston link from 'australasia' to 'backward', 1678 since Johnston is now uninhabited. 1679 1680 Changes to code 1681 1682 zic no longer mishandles some transitions in January 2038 when it 1683 attempts to work around Qt bug 53071. This fixes a bug affecting 1684 Pacific/Tongatapu that was introduced in zic 2016e. localtime.c 1685 now contains a workaround, useful when loading a file generated by 1686 a buggy zic. (Problem and localtime.c fix reported by Bradley 1687 White.) 1688 1689 zdump -i now outputs non-hour numeric time zone abbreviations 1690 without a colon, e.g., "+0530" rather than "+05:30". This agrees 1691 with zic %z and with common practice, and simplifies auditing of 1692 zdump output. 1693 1694 zdump is now buildable again with -DUSE_LTZ=0. 1695 (Problem reported by Joseph Myers.) 1696 1697 zdump.c now always includes private.h, to avoid code duplication 1698 with private.h. (Problem reported by Kees Dekker.) 1699 1700 localtime.c no longer mishandles early or late timestamps 1701 when TZ is set to a POSIX-style string that specifies DST. 1702 (Problem reported by Kees Dekker.) 1703 1704 date and strftime now cause %z to generate "-0000" instead of 1705 "+0000" when the UT offset is zero and the time zone abbreviation 1706 begins with "-". 1707 1708 Changes to documentation and commentary 1709 1710 The 'Theory' file now better documents choice of historical time 1711 zone abbreviations. (Problems reported by Michael Deckers.) 1712 1713 tz-link.htm now covers leap smearing, which is popular in clouds. 1714 1715 1716 Release 2016j - 2016-11-22 23:17:13 -0800 1717 1718 Briefly: Saratov, Russia moves from +03 to +04 on 2016-12-04. 1719 1720 Changes to future timestamps 1721 1722 Saratov, Russia switches from +03 to +04 on 2016-12-04 at 02:00. 1723 This hives off a new zone Europe/Saratov from Europe/Volgograd. 1724 (Thanks to Yuri Konotopov and Stepan Golosunov.) 1725 1726 Changes to past timestamps 1727 1728 The new zone Asia/Atyrau for Atyra Region, Kazakhstan, is like 1729 Asia/Aqtau except it switched from +05/+06 to +04/+05 in spring 1730 1999, not fall 1994. (Thanks to Stepan Golosunov.) 1731 1732 Changes to past time zone abbreviations 1733 1734 Asia/Gaza and Asia/Hebron now use "EEST", not "EET", to denote 1735 summer time before 1948. The old use of "EET" was a typo. 1736 1737 Changes to code 1738 1739 zic no longer mishandles file systems that lack hard links, fixing 1740 bugs introduced in 2016g. (Problems reported by Tom Lane.) 1741 Also, when the destination already contains symbolic links, zic 1742 should now work better on systems where the 'link' system call 1743 does not follow symbolic links. 1744 1745 Changes to documentation and commentary 1746 1747 tz-link.htm now documents the relationship between release version 1748 numbers and development-repository commit tags. (Suggested by 1749 Paul Koning.) 1750 1751 The 'Theory' file now documents UT. 1752 1753 iso3166.tab now accents "Curaao", and commentary now mentions 1754 the names "Cabo Verde" and "Czechia". (Thanks to Ji Boh.) 1755 1756 1757 Release 2016i - 2016-11-01 23:19:52 -0700 1758 1759 Briefly: Cyprus split into two time zones on 2016-10-30, and Tonga 1760 reintroduces DST on 2016-11-06. 1761 1762 Changes to future timestamps 1763 1764 Pacific/Tongatapu begins DST on 2016-11-06 at 02:00, ending on 1765 2017-01-15 at 03:00. Assume future observances in Tonga will be 1766 from the first Sunday in November through the third Sunday in 1767 January, like Fiji. (Thanks to Pulu Anau.) Switch to numeric 1768 time zone abbreviations for this zone. 1769 1770 Changes to past and future timestamps 1771 1772 Northern Cyprus is now +03 year round, causing a split in Cyprus 1773 time zones starting 2016-10-30 at 04:00. This creates a zone 1774 Asia/Famagusta. (Thanks to Even Scharning and Matt Johnson.) 1775 1776 Antarctica/Casey switched from +08 to +11 on 2016-10-22. 1777 (Thanks to Steffen Thorsen.) 1778 1779 Changes to past timestamps 1780 1781 Several corrections were made for pre-1975 timestamps in Italy. 1782 These affect Europe/Malta, Europe/Rome, Europe/San_Marino, and 1783 Europe/Vatican. 1784 1785 First, the 1893-11-01 00:00 transition in Italy used the new UT 1786 offset (+01), not the old (+00:49:56). (Thanks to Michael 1787 Deckers.) 1788 1789 Second, rules for daylight saving in Italy were changed to agree 1790 with Italy's National Institute of Metrological Research (INRiM) 1791 except for 1944, as follows (thanks to Pierpaolo Bernardi, Brian 1792 Inglis, and Michael Deckers): 1793 1794 The 1916-06-03 transition was at 24:00, not 00:00. 1795 1796 The 1916-10-01, 1919-10-05, and 1920-09-19 transitions were at 1797 00:00, not 01:00. 1798 1799 The 1917-09-30 and 1918-10-06 transitions were at 24:00, not 1800 01:00. 1801 1802 The 1944-09-17 transition was at 03:00, not 01:00. This 1803 particular change is taken from Italian law as INRiM's table, 1804 (which says 02:00) appears to have a typo here. Also, keep the 1805 1944-04-03 transition for Europe/Rome, as Rome was controlled by 1806 Germany then. 1807 1808 The 1967-1970 and 1972-1974 fallback transitions were at 01:00, 1809 not 00:00. 1810 1811 Changes to code 1812 1813 The code should now be buildable on AmigaOS merely by setting the 1814 appropriate Makefile variables. (From a patch by Carsten Larsen.) 1815 1816 1817 Release 2016h - 2016-10-19 23:17:57 -0700 1818 1819 Changes to future timestamps 1820 1821 Asia/Gaza and Asia/Hebron end DST on 2016-10-29 at 01:00, not 1822 2016-10-21 at 00:00. (Thanks to Sharef Mustafa.) Predict that 1823 future fall transitions will be on the last Saturday of October 1824 at 01:00, which is consistent with predicted spring transitions 1825 on the last Saturday of March. (Thanks to Tim Parenti.) 1826 1827 Changes to past timestamps 1828 1829 In Turkey, transitions in 1986-1990 were at 01:00 standard time 1830 not at 02:00, and the spring 1994 transition was on March 20, not 1831 March 27. (Thanks to Kvan Yazan.) 1832 1833 Changes to past and future time zone abbreviations 1834 1835 Asia/Colombo now uses numeric time zone abbreviations like "+0530" 1836 instead of alphabetic ones like "IST" and "LKT". Various 1837 English-language sources use "IST", "LKT" and "SLST", with no 1838 working consensus. (Usage of "SLST" mentioned by Sadika 1839 Sumanapala.) 1840 1841 Changes to code 1842 1843 zic no longer mishandles relativizing file names when creating 1844 symbolic links like /etc/localtime, when these symbolic links 1845 are outside the usual directory hierarchy. This fixes a bug 1846 introduced in 2016g. (Problem reported by Andreas Stieger.) 1847 1848 Changes to build procedure 1849 1850 New rules 'traditional_tarballs' and 'traditional_signatures' for 1851 building just the traditional-format distribution. (Requested by 1852 Deborah Goldsmith.) 1853 1854 The file 'version' is now put into the tzdata tarball too. 1855 (Requested by Howard Hinnant.) 1856 1857 Changes to documentation and commentary 1858 1859 The 'Theory' file now has a section on interface stability. 1860 (Requested by Paul Koning.) It also mentions features like 1861 tm_zone and localtime_rz that have long been supported by the 1862 reference code. 1863 1864 tz-link.htm has improved coverage of time zone boundaries suitable 1865 for geolocation. (Thanks to heads-ups from Evan Siroky and Matt 1866 Johnson.) 1867 1868 The US commentary now mentions Allen and the "day of two noons". 1869 1870 The Fiji commentary mentions the government's 2016-10-03 press 1871 release. (Thanks to Raymond Kumar.) 1872 1873 1874 Release 2016g - 2016-09-13 08:56:38 -0700 1875 1876 Changes to future timestamps 1877 1878 Turkey switched from EET/EEST (+02/+03) to permanent +03, 1879 effective 2016-09-07. (Thanks to Burak AYDIN.) Use "+03" rather 1880 than an invented abbreviation for the new time. 1881 1882 New leap second 2016-12-31 23:59:60 UTC as per IERS Bulletin C 52. 1883 (Thanks to Tim Parenti.) 1884 1885 Changes to past timestamps 1886 1887 For America/Los_Angeles, spring-forward transition times have been 1888 corrected from 02:00 to 02:01 in 1948, and from 02:00 to 01:00 in 1889 1950-1966. 1890 1891 For zones using Soviet time on 1919-07-01, transitions to UT-based 1892 time were at 00:00 UT, not at 02:00 local time. The affected 1893 zones are Europe/Kirov, Europe/Moscow, Europe/Samara, and 1894 Europe/Ulyanovsk. (Thanks to Alexander Belopolsky.) 1895 1896 Changes to past and future time zone abbreviations 1897 1898 The Factory zone now uses the time zone abbreviation -00 instead 1899 of a long English-language string, as -00 is now the normal way to 1900 represent an undefined time zone. 1901 1902 Several zones in Antarctica and the former Soviet Union, along 1903 with zones intended for ships at sea that cannot use POSIX TZ 1904 strings, now use numeric time zone abbreviations instead of 1905 invented or obsolete alphanumeric abbreviations. The affected 1906 zones are Antarctica/Casey, Antarctica/Davis, 1907 Antarctica/DumontDUrville, Antarctica/Mawson, Antarctica/Rothera, 1908 Antarctica/Syowa, Antarctica/Troll, Antarctica/Vostok, 1909 Asia/Anadyr, Asia/Ashgabat, Asia/Baku, Asia/Bishkek, Asia/Chita, 1910 Asia/Dushanbe, Asia/Irkutsk, Asia/Kamchatka, Asia/Khandyga, 1911 Asia/Krasnoyarsk, Asia/Magadan, Asia/Omsk, Asia/Sakhalin, 1912 Asia/Samarkand, Asia/Srednekolymsk, Asia/Tashkent, Asia/Tbilisi, 1913 Asia/Ust-Nera, Asia/Vladivostok, Asia/Yakutsk, Asia/Yekaterinburg, 1914 Asia/Yerevan, Etc/GMT-14, Etc/GMT-13, Etc/GMT-12, Etc/GMT-11, 1915 Etc/GMT-10, Etc/GMT-9, Etc/GMT-8, Etc/GMT-7, Etc/GMT-6, Etc/GMT-5, 1916 Etc/GMT-4, Etc/GMT-3, Etc/GMT-2, Etc/GMT-1, Etc/GMT+1, Etc/GMT+2, 1917 Etc/GMT+3, Etc/GMT+4, Etc/GMT+5, Etc/GMT+6, Etc/GMT+7, Etc/GMT+8, 1918 Etc/GMT+9, Etc/GMT+10, Etc/GMT+11, Etc/GMT+12, Europe/Kaliningrad, 1919 Europe/Minsk, Europe/Samara, Europe/Volgograd, and 1920 Indian/Kerguelen. For Europe/Moscow the invented abbreviation MSM 1921 was replaced by +05, whereas MSK and MSD were kept as they are not 1922 our invention and are widely used. 1923 1924 Changes to zone names 1925 1926 Rename Asia/Rangoon to Asia/Yangon, with a backward compatibility link. 1927 (Thanks to David Massoud.) 1928 1929 Changes to code 1930 1931 zic no longer generates binary files containing POSIX TZ-like 1932 strings that disagree with the local time type after the last 1933 explicit transition in the data. This fixes a bug with 1934 Africa/Casablanca and Africa/El_Aaiun in some year-2037 timestamps 1935 on the reference platform. (Thanks to Alexander Belopolsky for 1936 reporting the bug and suggesting a way forward.) 1937 1938 If the installed localtime and/or posixrules files are symbolic 1939 links, zic now keeps them symbolic links when updating them, for 1940 compatibility with platforms like OpenSUSE where other programs 1941 configure these files as symlinks. 1942 1943 zic now avoids hard linking to symbolic links, avoids some 1944 unnecessary mkdir and stat system calls, and uses shorter file 1945 names internally. 1946 1947 zdump has a new -i option to generate transitions in a 1948 more-compact but still human-readable format. This option is 1949 experimental, and the output format may change in future versions. 1950 (Thanks to Jon Skeet for suggesting that an option was needed, 1951 and thanks to Tim Parenti and Chris Rovick for further comments.) 1952 1953 Changes to build procedure 1954 1955 An experimental distribution format is available, in addition 1956 to the traditional format which will continue to be distributed. 1957 The new format is a tarball tzdb-VERSION.tar.lz with signature 1958 file tzdb-VERSION.tar.lz.asc. It unpacks to a top-level directory 1959 tzdb-VERSION containing the code and data of the traditional 1960 two-tarball format, along with extra data that may be useful. 1961 (Thanks to Antonio Diaz Diaz, Oscar van Vlijmen, and many others 1962 for comments about the experimental format.) 1963 1964 The release version number is now more accurate in the usual case 1965 where releases are built from a Git repository. For example, if 1966 23 commits and some working-file changes have been made since 1967 release 2016g, the version number is now something like 1968 '2016g-23-g50556e3-dirty' instead of the misleading '2016g'. 1969 Tagged releases use the same version number format as before, 1970 e.g., '2016g'. To support the more-accurate version number, its 1971 specification has moved from a line in the Makefile to a new 1972 source file 'version'. 1973 1974 The experimental distribution contains a file to2050.tzs that 1975 contains what should be the output of 'zdump -i -c 2050' on 1976 primary zones. If this file is available, 'make check' now checks 1977 that zdump generates this output. 1978 1979 'make check_web' now works on Fedora-like distributions. 1980 1981 Changes to documentation and commentary 1982 1983 tzfile.5 now documents the new restriction on POSIX TZ-like 1984 strings that is now implemented by zic. 1985 1986 Comments now cite URLs for some 1917-1921 Russian DST decrees. 1987 (Thanks to Alexander Belopolsky.) 1988 1989 tz-link.htm mentions JuliaTime (thanks to Curtis Vogt) and Time4J 1990 (thanks to Meno Hochschild) and ThreeTen-Extra, and its 1991 description of Java 8 has been brought up to date (thanks to 1992 Stephen Colebourne). Its description of local time on Mars has 1993 been updated to match current practice, and URLs have been updated 1994 and some obsolete ones removed. 1995 1996 1997 Release 2016f - 2016-07-05 16:26:51 +0200 1998 1999 Changes affecting future timestamps 2000 2001 The Egyptian government changed its mind on short notice, and 2002 Africa/Cairo will not introduce DST starting 2016-07-07 after all. 2003 (Thanks to Mina Samuel.) 2004 2005 Asia/Novosibirsk switches from +06 to +07 on 2016-07-24 at 02:00. 2006 (Thanks to Stepan Golosunov.) 2007 2008 Changes to past and future timestamps 2009 2010 Asia/Novokuznetsk and Asia/Novosibirsk now use numeric time zone 2011 abbreviations instead of invented ones. 2012 2013 Changes affecting past timestamps 2014 2015 Europe/Minsk's 1992-03-29 spring-forward transition was at 02:00 not 00:00. 2016 (Thanks to Stepan Golosunov.) 2017 2018 2019 Release 2016e - 2016-06-14 08:46:16 -0700 2020 2021 Changes affecting future timestamps 2022 2023 Africa/Cairo observes DST in 2016 from July 7 to the end of October. 2024 Guess October 27 and 24:00 transitions. (Thanks to Steffen Thorsen.) 2025 For future years, guess April's last Thursday to October's last 2026 Thursday except for Ramadan. 2027 2028 Changes affecting past timestamps 2029 2030 Locations while uninhabited now use '-00', not 'zzz', as a 2031 placeholder time zone abbreviation. This is inspired by Internet 2032 RFC 3339 and is more consistent with numeric time zone 2033 abbreviations already used elsewhere. The change affects several 2034 arctic and antarctic locations, e.g., America/Cambridge_Bay before 2035 1920 and Antarctica/Troll before 2005. 2036 2037 Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was 2038 at 03:00, not 23:00 the previous day. (Thanks to Michael Deckers.) 2039 2040 Changes to code 2041 2042 zic now outputs a dummy transition at time 2**31 - 1 in zones 2043 whose POSIX-style TZ strings contain a '<'. This mostly works 2044 around Qt bug 53071 <https://bugreports.qt.io/browse/QTBUG-53071>. 2045 (Thanks to Zhanibek Adilbekov for reporting the Qt bug.) 2046 2047 Changes affecting documentation and commentary 2048 2049 tz-link.htm says why governments should give plenty of notice for 2050 time zone or DST changes, and refers to Matt Johnson's blog post. 2051 2052 tz-link.htm mentions Tzdata for Elixir. (Thanks to Matt Johnson.) 2053 2054 2055 Release 2016d - 2016-04-17 22:50:29 -0700 2056 2057 Changes affecting future timestamps 2058 2059 America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30. 2060 (Thanks to Alexander Krivenyshev for the heads-up.) 2061 2062 Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00. 2063 (Thanks to Alexander Krivenyshev and Matt Johnson.) 2064 2065 New zone Asia/Tomsk, split off from Asia/Novosibirsk. It covers 2066 Tomsk Oblast, Russia, which switches from +06 to +07 on 2016-05-29 2067 at 02:00. (Thanks to Stepan Golosunov.) 2068 2069 Changes affecting past timestamps 2070 2071 New zone Europe/Kirov, split off from Europe/Volgograd. It covers 2072 Kirov Oblast, Russia, which switched from +04/+05 to +03/+04 on 2073 1989-03-26 at 02:00, roughly a year after Europe/Volgograd made 2074 the same change. (Thanks to Stepan Golosunov.) 2075 2076 Russia and nearby locations had daylight-saving transitions on 2077 1992-03-29 at 02:00 and 1992-09-27 at 03:00, instead of on 2078 1992-03-28 at 23:00 and 1992-09-26 at 23:00. (Thanks to Stepan 2079 Golosunov.) 2080 2081 Many corrections to historical time in Kazakhstan from 1991 2082 through 2005. (Thanks to Stepan Golosunov.) Replace Kazakhstan's 2083 invented time zone abbreviations with numeric abbreviations. 2084 2085 Changes to commentary 2086 2087 Mention Internet RFCs 7808 (TZDIST) and 7809 (CalDAV time zone references). 2088 2089 2090 Release 2016c - 2016-03-23 00:51:27 -0700 2091 2092 Changes affecting future timestamps 2093 2094 Azerbaijan no longer observes DST. (Thanks to Steffen Thorsen.) 2095 2096 Chile reverts from permanent to seasonal DST. (Thanks to Juan 2097 Correa for the heads-up, and to Tim Parenti for corrections.) 2098 Guess that future transitions are August's and May's second 2099 Saturdays at 24:00 mainland time. Also, call the period from 2100 2014-09-07 through 2016-05-14 daylight saving time instead of 2101 standard time, as that seems more appropriate now. 2102 2103 Changes affecting past timestamps 2104 2105 Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to 2106 +02/+03 on 1989-03-26, not 1991-03-31. Europe/Volgograd changed 2107 from +04/+05 to +03/+04 on 1988-03-27, not 1989-03-26. 2108 (Thanks to Stepan Golosunov.) 2109 2110 Changes to commentary 2111 2112 Several updates and URLs for historical and proposed Russian changes. 2113 (Thanks to Stepan Golosunov, Matt Johnson, and Alexander Krivenyshev.) 2114 2115 2116 Release 2016b - 2016-03-12 17:30:14 -0800 2117 2118 Compatibility note 2119 2120 Starting with release 2016b, some data entries cause zic implementations 2121 derived from tz releases 2005j through 2015e to issue warnings like 2122 "time zone abbreviation differs from POSIX standard (+03)". 2123 These warnings should not otherwise affect zic's output and can safely be 2124 ignored on today's platforms, as the warnings refer to a restriction in 2125 POSIX.1-1988 that was removed in POSIX.1-2001. One way to suppress the 2126 warnings is to upgrade to zic derived from tz releases 2015f and later. 2127 2128 Changes affecting future timestamps 2129 2130 New zones Europe/Astrakhan and Europe/Ulyanovsk for Astrakhan and 2131 Ulyanovsk Oblasts, Russia, both of which will switch from +03 to +04 on 2132 2016-03-27 at 02:00 local time. They need distinct zones since their 2133 post-1970 histories disagree. New zone Asia/Barnaul for Altai Krai and 2134 Altai Republic, Russia, which will switch from +06 to +07 on the same date 2135 and local time. The Astrakhan change is already official; the others have 2136 passed the first reading in the State Duma and are extremely likely. 2137 Also, Asia/Sakhalin moves from +10 to +11 on 2016-03-27 at 02:00. 2138 (Thanks to Alexander Krivenyshev for the heads-up, and to Matt Johnson 2139 and Stepan Golosunov for followup.) 2140 2141 As a trial of a new system that needs less information to be made up, 2142 the new zones use numeric time zone abbreviations like "+04" 2143 instead of invented abbreviations like "ASTT". 2144 2145 Haiti will not observe DST in 2016. (Thanks to Jean Antoine via 2146 Steffen Thorsen.) 2147 2148 Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00. 2149 (Thanks to Hannah Kreitem.) Guess future transitions will be March's last 2150 Saturday at 01:00, not March's last Friday at 24:00. 2151 2152 Changes affecting past timestamps 2153 2154 Europe/Chisinau observed DST during 1990, and switched from +04 to 2155 +03 at 1990-05-06 02:00, instead of switching from +03 to +02. 2156 (Thanks to Stepan Golosunov.) 2157 2158 1991 abbreviations in Europe/Samara should be SAMT/SAMST, not 2159 KUYT/KUYST. (Thanks to Stepan Golosunov.) 2160 2161 Changes to code 2162 2163 tzselect's diagnostics and checking, and checktab.awk's checking, 2164 have been improved. (Thanks to J William Piggott.) 2165 2166 tzcode now builds under MinGW. (Thanks to Ian Abbott and Esben Haabendal.) 2167 2168 tzselect now tests Julian-date TZ settings more accurately. 2169 (Thanks to J William Piggott.) 2170 2171 Changes to commentary 2172 2173 Comments in zone tables have been improved. (Thanks to J William Piggott.) 2174 2175 tzselect again limits its menu comments so that menus fit on a 2176 2480 alphanumeric display. 2177 2178 A new web page tz-how-to.html. (Thanks to Bill Seymour.) 2179 2180 In the Theory file, the description of possible time zone abbreviations in 2181 tzdata has been cleaned up, as the old description was unclear and 2182 inconsistent. (Thanks to Alain Mouette for reporting the problem.) 2183 2184 2185 Release 2016a - 2016-01-26 23:28:02 -0800 2186 2187 Changes affecting future timestamps 2188 2189 America/Cayman will not observe daylight saving this year after all. 2190 Revert our guess that it would. (Thanks to Matt Johnson.) 2191 2192 Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00. 2193 (Thanks to Alexander Krivenyshev.) 2194 2195 Asia/Tehran now has DST predictions for the year 2038 and later, 2196 to be March 21 00:00 to September 21 00:00. This is likely better 2197 than predicting no DST, albeit off by a day every now and then. 2198 2199 Changes affecting past and future timestamps 2200 2201 America/Metlakatla switched from PST all year to AKST/AKDT on 2202 2015-11-01 at 02:00. (Thanks to Steffen Thorsen.) 2203 2204 America/Santa_Isabel has been removed, and replaced with a 2205 backward compatibility link to America/Tijuana. Its contents were 2206 apparently based on a misreading of Mexican legislation. 2207 2208 Changes affecting past timestamps 2209 2210 Asia/Karachi's two transition times in 2002 were off by a minute. 2211 (Thanks to Matt Johnson.) 2212 2213 Changes affecting build procedure 2214 2215 An installer can now combine leap seconds with use of the backzone file, 2216 e.g., with 'make PACKRATDATA=backzone REDO=posix_right zones'. 2217 The old 'make posix_packrat' rule is now marked as obsolescent. 2218 (Thanks to Ian Abbott for an initial implementation.) 2219 2220 Changes affecting documentation and commentary 2221 2222 A new file LICENSE makes it easier to see that the code and data 2223 are mostly public-domain. (Thanks to James Knight.) The three 2224 non-public-domain files now use the current (3-clause) BSD license 2225 instead of older versions of that license. 2226 2227 tz-link.htm mentions the BDE library (thanks to Andrew Paprocki), 2228 CCTZ (thanks to Tim Parenti), TimeJones.com, and has a new section 2229 on editing tz source files (with a mention of Sublime zoneinfo, 2230 thanks to Gilmore Davidson). 2231 2232 The Theory and asia files now mention the 2015 book "The Global 2233 Transformation of Time, 1870-1950", and cite a couple of reviews. 2234 2235 The America/Chicago entry now documents the informal use of US 2236 central time in Fort Pierre, South Dakota. (Thanks to Rick 2237 McDermid, Matt Johnson, and Steve Jones.) 2238 2239 2240 Release 2015g - 2015-10-01 00:39:51 -0700 2241 2242 Changes affecting future timestamps 2243 2244 Turkey's 2015 fall-back transition is scheduled for Nov. 8, not Oct. 25. 2245 (Thanks to Fatih.) 2246 2247 Norfolk moves from +1130 to +1100 on 2015-10-04 at 02:00 local time. 2248 (Thanks to Alexander Krivenyshev.) 2249 2250 Fiji's 2016 fall-back transition is scheduled for January 17, not 24. 2251 (Thanks to Ken Rylander.) 2252 2253 Fort Nelson, British Columbia will not fall back on 2015-11-01. It has 2254 effectively been on MST (-0700) since it advanced its clocks on 2015-03-08. 2255 New zone America/Fort_Nelson. (Thanks to Matt Johnson.) 2256 2257 Changes affecting past timestamps 2258 2259 Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00. 2260 2261 Changes affecting code 2262 2263 localtime no longer mishandles America/Anchorage after 2037. 2264 (Thanks to Bradley White for reporting the bug.) 2265 2266 On hosts with signed 32-bit time_t, localtime no longer mishandles 2267 Pacific/Fiji after 2038-01-16 14:00 UTC. 2268 2269 The localtime module allows the variables 'timezone', 'daylight', 2270 and 'altzone' to be in common storage shared with other modules, 2271 and declares them in case the system <time.h> does not. 2272 (Problems reported by Kees Dekker.) 2273 2274 On platforms with tm_zone, strftime.c now assumes it is not NULL. 2275 This simplifies the code and is consistent with zdump.c. 2276 (Problem reported by Christos Zoulas.) 2277 2278 Changes affecting documentation 2279 2280 The tzfile man page now documents that transition times denote the 2281 starts (not the ends) of the corresponding time periods. 2282 (Ambiguity reported by Bill Seymour.) 2283 2284 2285 Release 2015f - 2015-08-10 18:06:56 -0700 2286 2287 Changes affecting future timestamps 2288 2289 North Korea switches to +0830 on 2015-08-15. (Thanks to Steffen Thorsen.) 2290 The abbreviation remains "KST". (Thanks to Robert Elz.) 2291 2292 Uruguay no longer observes DST. (Thanks to Steffen Thorsen 2293 and Pablo Camargo.) 2294 2295 Changes affecting past and future timestamps 2296 2297 Moldova starts and ends DST at 00:00 UTC, not at 01:00 UTC. 2298 (Thanks to Roman Tudos.) 2299 2300 Changes affecting data format and code 2301 2302 zic's '-y YEARISTYPE' option is no longer documented. The TYPE 2303 field of a Rule line should now be '-'; the old values 'even', 2304 'odd', 'uspres', 'nonpres', 'nonuspres' were already undocumented. 2305 Although the implementation has not changed, these features do not 2306 work in the default installation, they are not used in the data, 2307 and they are now considered obsolescent. 2308 2309 zic now checks that two rules don't take effect at the same time. 2310 (Thanks to Jon Skeet and Arthur David Olson.) Constraints on 2311 simultaneity are now documented. 2312 2313 The two characters '%z' in a zone format now stand for the UT 2314 offset, e.g., '-07' for seven hours behind UT and '+0530' for 2315 five hours and thirty minutes ahead. This better supports time 2316 zone abbreviations conforming to POSIX.1-2001 and later. 2317 2318 Changes affecting installed data files 2319 2320 Comments for America/Halifax and America/Glace_Bay have been improved. 2321 (Thanks to Brian Inglis.) 2322 2323 Data entries have been simplified for Atlantic/Canary, Europe/Simferopol, 2324 Europe/Sofia, and Europe/Tallinn. This yields slightly smaller 2325 installed data files for Europe/Simferopol and Europe/Tallinn. 2326 It does not affect timestamps. (Thanks to Howard Hinnant.) 2327 2328 Changes affecting code 2329 2330 zdump and zic no longer warn about valid time zone abbreviations 2331 like '-05'. 2332 2333 Some Visual Studio 2013 warnings have been suppressed. 2334 (Thanks to Kees Dekker.) 2335 2336 'date' no longer sets the time of day and its -a, -d, -n and -t 2337 options have been removed. Long obsolescent, the implementation 2338 of these features had porting problems. Builders no longer need 2339 to configure HAVE_ADJTIME, HAVE_SETTIMEOFDAY, or HAVE_UTMPX_H. 2340 (Thanks to Kees Dekker for pointing out the problem.) 2341 2342 Changes affecting documentation 2343 2344 The Theory file mentions naming issues earlier, as these seem to be 2345 poorly publicized (thanks to Gilmore Davidson for reporting the problem). 2346 2347 tz-link.htm mentions Time Zone Database Parser (thanks to Howard Hinnant). 2348 2349 Mention that Herbert Samuel introduced the term "Summer Time". 2350 2351 2352 Release 2015e - 2015-06-13 10:56:02 -0700 2353 2354 Changes affecting future timestamps 2355 2356 Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00, 2357 not 06-13 and 07-18 as we had guessed. (Thanks to Milamber.) 2358 2359 Assume Cayman Islands will observe DST starting next year, using US rules. 2360 Although it isn't guaranteed, it is the most likely. 2361 2362 Changes affecting data format 2363 2364 The file 'iso3166.tab' now uses UTF-8, so that its entries can better 2365 spell the names of land Islands, Cte d'Ivoire, and Runion. 2366 2367 Changes affecting code 2368 2369 When displaying data, tzselect converts it to the current locale's 2370 encoding if the iconv command works. (Problem reported by random832.) 2371 2372 tzselect no longer mishandles Dominica, fixing a bug introduced 2373 in Release 2014f. (Problem reported by Owen Leibman.) 2374 2375 zic -l no longer fails when compiled with -DTZDEFAULT=\"/etc/localtime\". 2376 This fixes a bug introduced in Release 2014f. 2377 (Problem reported by Leonardo Chiquitto.) 2378 2379 2380 Release 2015d - 2015-04-24 08:09:46 -0700 2381 2382 Changes affecting future timestamps 2383 2384 Egypt will not observe DST in 2015 and will consider canceling it 2385 permanently. For now, assume no DST indefinitely. 2386 (Thanks to Ahmed Nazmy and Tim Parenti.) 2387 2388 Changes affecting past timestamps 2389 2390 America/Whitehorse switched from UT -09 to -08 on 1967-05-28, not 2391 1966-07-01. Also, Yukon's time zone history is documented better. 2392 (Thanks to Brian Inglis and Dennis Ferguson.) 2393 2394 Change affecting past and future time zone abbreviations 2395 2396 The abbreviations for Hawaii-Aleutian standard and daylight times 2397 have been changed from HAST/HADT to HST/HDT, as per US Government 2398 Printing Office style. This affects only America/Adak since 1983, 2399 as America/Honolulu was already using the new style. 2400 2401 Changes affecting code 2402 2403 zic has some minor performance improvements. 2404 2405 2406 Release 2015c - 2015-04-11 08:55:55 -0700 2407 2408 Changes affecting future timestamps 2409 2410 Egypt's spring-forward transition is at 24:00 on April's last Thursday, 2411 not 00:00 on April's last Friday. 2015's transition will therefore be on 2412 Thursday, April 30 at 24:00, not Friday, April 24 at 00:00. Similar fixes 2413 apply to 2026, 2037, 2043, etc. (Thanks to Steffen Thorsen.) 2414 2415 Changes affecting past timestamps 2416 2417 The following changes affect some pre-1991 Chile-related timestamps 2418 in America/Santiago, Antarctica/Palmer, and Pacific/Easter. 2419 2420 The 1910 transition was January 10, not January 1. 2421 2422 The 1918 transition was September 10, not September 1. 2423 2424 The UT -04 time observed from 1932 to 1942 is now considered to 2425 be standard time, not year-round DST. 2426 2427 Santiago observed DST (UT -03) from 1946-07-15 through 2428 1946-08-31, then reverted to standard time, then switched to -05 2429 on 1947-04-01. 2430 2431 Assume transitions before 1968 were at 00:00, since we have no data 2432 saying otherwise. 2433 2434 The spring 1988 transition was 1988-10-09, not 1988-10-02. 2435 The fall 1990 transition was 1990-03-11, not 1990-03-18. 2436 2437 Assume no UT offset change for Pacific/Easter on 1890-01-01, 2438 and omit all transitions on Pacific/Easter from 1942 through 1946 2439 since we have no data suggesting that they existed. 2440 2441 One more zone has been turned into a link, as it differed 2442 from an existing zone only for older timestamps. As usual, 2443 this change affects UT offsets in pre-1970 timestamps only. 2444 The zone's old contents have been moved to the 'backzone' file. 2445 The affected zone is America/Montreal. 2446 2447 Changes affecting commentary 2448 2449 Mention the TZUpdater tool. 2450 2451 Mention "The Time Now". (Thanks to Brandon Ramsey.) 2452 2453 2454 Release 2015b - 2015-03-19 23:28:11 -0700 2455 2456 Changes affecting future timestamps 2457 2458 Mongolia will start observing DST again this year, from the last 2459 Saturday in March at 02:00 to the last Saturday in September at 00:00. 2460 (Thanks to Ganbold Tsagaankhuu.) 2461 2462 Palestine will start DST on March 28, not March 27. Also, 2463 correct the fall 2014 transition from September 26 to October 24. 2464 Adjust future predictions accordingly. (Thanks to Steffen Thorsen.) 2465 2466 Changes affecting past timestamps 2467 2468 The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a 2469 regression. (Thanks to Stuart Bishop for reporting the problem.) 2470 2471 Some more zones have been turned into links, when they differed 2472 from existing zones only for older timestamps. As usual, 2473 these changes affect UT offsets in pre-1970 timestamps only. 2474 Their old contents have been moved to the 'backzone' file. 2475 The affected zones are: America/Antigua, America/Cayman, 2476 Pacific/Midway, and Pacific/Saipan. 2477 2478 Changes affecting time zone abbreviations 2479 2480 Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD". 2481 (Thanks to Hank W.) 2482 2483 Changes affecting code 2484 2485 Fix integer overflow bug in reference 'mktime' implementation. 2486 (Problem reported by Jrg Richter.) 2487 2488 Allow -Dtime_tz=time_t compilations, and allow -Dtime_tz=... libraries 2489 to be used in the same executable as standard-library time_t functions. 2490 (Problems reported by Bradley White.) 2491 2492 Changes affecting commentary 2493 2494 Cite the recent Mexican decree changing Quintana Roo's time zone. 2495 (Thanks to Carlos Ral Perasso.) 2496 2497 Likewise for the recent Chilean decree. (Thanks to Eduardo Romero Urra.) 2498 2499 Update info about Mars time. 2500 2501 2502 Release 2015a - 2015-01-29 22:35:20 -0800 2503 2504 Changes affecting future timestamps 2505 2506 The Mexican state of Quintana Roo, represented by America/Cancun, 2507 will shift from Central Time with DST to Eastern Time without DST 2508 on 2015-02-01 at 02:00. (Thanks to Steffen Thorsen and Gwillim Law.) 2509 2510 Chile will not change clocks in April or thereafter; its new standard time 2511 will be its old daylight saving time. This affects America/Santiago, 2512 Pacific/Easter, and Antarctica/Palmer. (Thanks to Juan Correa.) 2513 2514 New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49. 2515 (Thanks to Tim Parenti.) 2516 2517 Changes affecting past timestamps 2518 2519 Iceland observed DST in 1919 and 1921, and its 1939 fallback 2520 transition was Oct. 29, not Nov. 29. Remove incorrect data from 2521 Shanks about time in Iceland between 1837 and 1908. 2522 2523 Some more zones have been turned into links, when they differed 2524 from existing zones only for older timestamps. As usual, 2525 these changes affect UT offsets in pre-1970 timestamps only. 2526 Their old contents have been moved to the 'backzone' file. 2527 The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait, 2528 and Asia/Muscat. 2529 2530 Changes affecting code 2531 2532 tzalloc now scrubs time zone abbreviations compatibly with the way 2533 that tzset always has, by replacing invalid bytes with '_' and by 2534 shortening too-long abbreviations. 2535 2536 tzselect ports to POSIX awk implementations, no longer mishandles 2537 POSIX TZ settings when GNU awk is used, and reports POSIX TZ 2538 settings to the user. (Thanks to Stefan Kuhn.) 2539 2540 Changes affecting build procedure 2541 2542 'make check' now checks for links to links in the data. 2543 One such link (for Africa/Asmera) has been fixed. 2544 (Thanks to Stephen Colebourne for pointing out the problem.) 2545 2546 Changes affecting commentary 2547 2548 The leapseconds file commentary now mentions the expiration date. 2549 (Problem reported by Martin Burnicki.) 2550 2551 Update Mexican Library of Congress URL. 2552 2553 2554 Release 2014j - 2014-11-10 17:37:11 -0800 2555 2556 Changes affecting current and future timestamps 2557 2558 Turks & Caicos' switch from US eastern time to UT -04 year-round 2559 did not occur on 2014-11-02 at 02:00. It's currently scheduled 2560 for 2015-11-01 at 02:00. (Thanks to Chris Walton.) 2561 2562 Changes affecting past timestamps 2563 2564 Many pre-1989 timestamps have been corrected for Asia/Seoul and 2565 Asia/Pyongyang, based on sources for the Korean-language Wikipedia 2566 entry for time in Korea. (Thanks to Sanghyuk Jung.) Also, no 2567 longer guess that Pyongyang mimicked Seoul time after World War II, 2568 as this is politically implausible. 2569 2570 Some more zones have been turned into links, when they differed 2571 from existing zones only for older timestamps. As usual, 2572 these changes affect UT offsets in pre-1970 timestamps only. 2573 Their old contents have been moved to the 'backzone' file. 2574 The affected zones are: Africa/Addis_Ababa, Africa/Asmara, 2575 Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Kampala, 2576 Africa/Mogadishu, Indian/Antananarivo, Indian/Comoro, and 2577 Indian/Mayotte. 2578 2579 Changes affecting commentary 2580 2581 The commentary is less enthusiastic about Shanks as a source, 2582 and is more careful to distinguish UT from UTC. 2583 2584 2585 Release 2014i - 2014-10-21 22:04:57 -0700 2586 2587 Changes affecting future timestamps 2588 2589 Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00. 2590 (Thanks to Ken Rylander for the heads-up.) Guess that future 2591 years will use a similar pattern. 2592 2593 A new Zone Pacific/Bougainville, for the part of Papua New Guinea 2594 that plans to switch from UT +10 to +11 on 2014-12-28 at 02:00. 2595 (Thanks to Kiley Walbom for the heads-up.) 2596 2597 Changes affecting time zone abbreviations 2598 2599 Since Belarus is not changing its clocks even though Moscow is, 2600 the time zone abbreviation in Europe/Minsk is changing from FET 2601 to its more-traditional value MSK on 2014-10-26 at 01:00. 2602 (Thanks to Alexander Bokovoy for the heads-up about Belarus.) 2603 2604 The new abbreviation IDT stands for the pre-1976 use of UT +08 in 2605 Indochina, to distinguish it better from ICT (+07). 2606 2607 Changes affecting past timestamps 2608 2609 Many timestamps have been corrected for Asia/Ho_Chi_Minh before 1976 2610 (thanks to Trn Ngc Qun for an indirect pointer to Trn Tin Bnh's 2611 authoritative book). Asia/Ho_Chi_Minh has been added to 2612 zone1970.tab, to give tzselect users in Vietnam two choices, 2613 since north and south Vietnam disagreed after our 1970 cutoff. 2614 2615 Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as 2616 they differed from existing zones only for older timestamps. As 2617 usual, these changes affect pre-1970 timestamps only. Their old 2618 contents have been moved to the 'backzone' file. 2619 2620 Changes affecting code 2621 2622 The time-related library functions now set errno on failure, and 2623 some crashes in the new tzalloc-related library functions have 2624 been fixed. (Thanks to Christos Zoulas for reporting most of 2625 these problems and for suggesting fixes.) 2626 2627 If USG_COMPAT is defined and the requested timestamp is standard time, 2628 the tz library's localtime and mktime functions now set the extern 2629 variable timezone to a value appropriate for that timestamp; and 2630 similarly for ALTZONE, daylight saving time, and the altzone variable. 2631 This change is a companion to the tzname change in 2014h, and is 2632 designed to make timezone and altzone more compatible with tzname. 2633 2634 The tz library's functions now set errno to EOVERFLOW if they fail 2635 because the result cannot be represented. ctime and ctime_r now 2636 return NULL and set errno when a timestamp is out of range, rather 2637 than having undefined behavior. 2638 2639 Some bugs associated with the new 2014g functions have been fixed. 2640 This includes a bug that largely incapacitated the new functions 2641 time2posix_z and posix2time_z. (Thanks to Christos Zoulas.) 2642 It also includes some uses of uninitialized variables after tzalloc. 2643 The new code uses the standard type 'ssize_t', which the Makefile 2644 now gives porting advice about. 2645 2646 Changes affecting commentary 2647 2648 Updated URLs for NRC Canada (thanks to Matt Johnson and Brian Inglis). 2649 2650 2651 Release 2014h - 2014-09-25 18:59:03 -0700 2652 2653 Changes affecting past timestamps 2654 2655 America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28. 2656 2657 Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01, 2658 not 1920-01-06. The old entry was based on a misinterpretation of Shanks. 2659 2660 Some more zones have been turned into links, when they differed 2661 from existing zones only for older timestamps. As usual, 2662 these changes affect UT offsets in pre-1970 timestamps only. 2663 Their old contents have been moved to the 'backzone' file. 2664 The affected zones are: Africa/Blantyre, Africa/Bujumbura, 2665 Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi, 2666 Africa/Lusaka, Africa/Maseru, and Africa/Mbabane. 2667 2668 Changes affecting code 2669 2670 zdump -V and -v now output gmtoff= values on all platforms, 2671 not merely on platforms defining TM_GMTOFF. 2672 2673 The tz library's localtime and mktime functions now set tzname to a value 2674 appropriate for the requested timestamp, and zdump now uses this 2675 on platforms not defining TM_ZONE, fixing a 2014g regression. 2676 (Thanks to Tim Parenti for reporting the problem.) 2677 2678 The tz library no longer sets tzname if localtime or mktime fails. 2679 2680 zdump -c no longer mishandles transitions near year boundaries. 2681 (Thanks to Tim Parenti for reporting the problem.) 2682 2683 An access to uninitialized data has been fixed. 2684 (Thanks to Jrg Richter for reporting the problem.) 2685 2686 When THREAD_SAFE is defined, the code ports to the C11 memory model. 2687 A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined 2688 and two threads race to initialize data used by gmtime-like functions. 2689 (Thanks to Andy Heninger for reporting the problems.) 2690 2691 Changes affecting build procedure 2692 2693 'make check' now checks better for properly-sorted data. 2694 2695 Changes affecting documentation and commentary 2696 2697 zdump's gmtoff=N output is now documented, and its isdst=D output 2698 is now documented to possibly output D values other than 0 or 1. 2699 2700 zdump -c's treatment of years is now documented to use the 2701 Gregorian calendar and Universal Time without leap seconds, 2702 and its behavior at cutoff boundaries is now documented better. 2703 (Thanks to Arthur David Olson and Tim Parenti for reporting the problems.) 2704 2705 Programs are now documented to use the proleptic Gregorian calendar. 2706 (Thanks to Alan Barrett for the suggestion.) 2707 2708 Fractional-second GMT offsets have been documented for civil time 2709 in 19th-century Chennai, Jakarta, and New York. 2710 2711 2712 Release 2014g - 2014-08-28 12:31:23 -0700 2713 2714 Changes affecting future timestamps 2715 2716 Turks & Caicos is switching from US eastern time to UT -04 2717 year-round, modeled as a switch on 2014-11-02 at 02:00. 2718 [As noted in 2014j, this switch was later delayed.] 2719 2720 Changes affecting past timestamps 2721 2722 Time in Russia or the USSR before 1926 or so has been corrected by 2723 a few seconds in the following zones: Asia/Irkutsk, 2724 Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi, 2725 Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara. For 2726 Asia/Yekaterinburg the correction is a few minutes. (Thanks to 2727 Vladimir Karpinsky.) 2728 2729 The Portuguese decree of 1911-05-26 took effect on 1912-01-01. 2730 This affects 1911 timestamps in Africa/Bissau, Africa/Luanda, 2731 Atlantic/Azores, and Atlantic/Madeira. Also, Lisbon's pre-1912 2732 GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32. 2733 (Thanks to Stephen Colebourne for pointing to the decree.) 2734 2735 Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59. 2736 2737 A new file 'backzone' contains data which may appeal to 2738 connoisseurs of old timestamps, although it is out of scope for 2739 the tz database, is often poorly sourced, and contains some data 2740 that is known to be incorrect. The new file is not recommended 2741 for ordinary use and its entries are not installed by default. 2742 (Thanks to Lester Caine for the high-quality Jersey, Guernsey, and 2743 Isle of Man entries.) 2744 2745 Some more zones have been turned into links, when they differed 2746 from existing zones only for older timestamps. As usual, 2747 these changes affect UT offsets in pre-1970 timestamps only. 2748 Their old contents have been moved to the 'backzone' file. 2749 The affected zones are: Africa/Bangui, Africa/Brazzaville, 2750 Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda, 2751 Africa/Malabo, Africa/Niamey, and Africa/Porto-Novo. 2752 2753 Changes affecting code 2754 2755 Unless NETBSD_INSPIRED is defined to 0, the tz library now 2756 supplies functions for creating and using objects that represent 2757 timezones. The new functions are tzalloc, tzfree, localtime_rz, 2758 mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and 2759 time2posix_z. They are intended for performance: for example, 2760 localtime_rz (unlike localtime_r) is trivially thread-safe without 2761 locking. (Thanks to Christos Zoulas for proposing NetBSD-inspired 2762 functions, and to Alan Barrett and Jonathan Lennox for helping to 2763 debug the change.) 2764 2765 zdump now builds with the tz library unless USE_LTZ is defined to 0, 2766 This lets zdump use tz features even if the system library lacks them. 2767 To build zdump with the system library, use 'make CFLAGS=-DUSE_LTZ=0 2768 TZDOBJS=zdump.o CHECK_TIME_T_ALTERNATIVES='. 2769 2770 zdump now uses localtime_rz if available, as it's significantly faster, 2771 and it can help zdump better diagnose invalid timezone names. 2772 Define HAVE_LOCALTIME_RZ to 0 to suppress this. HAVE_LOCALTIME_RZ 2773 defaults to 1 if NETBSD_INSPIRED && USE_LTZ. When localtime_rz is 2774 not available, zdump now uses localtime_r and tzset if available, 2775 as this is a bit cleaner and faster than plain localtime. Compile 2776 with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system 2777 lacks these two functions. 2778 2779 If THREAD_SAFE is defined to 1, the tz library is now thread-safe. 2780 Although not needed for tz's own applications, which are single-threaded, 2781 this supports POSIX better if the tz library is used in multithreaded apps. 2782 2783 Some crashes have been fixed when zdump or the tz library is given 2784 invalid or outlandish input. 2785 2786 The tz library no longer mishandles leap seconds on platforms with 2787 unsigned time_t in timezones that lack ordinary transitions after 1970. 2788 2789 The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not 2790 already defined, to make it easier to configure on common platforms. 2791 Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this. 2792 2793 Unless the new macro UNINIT_TRAP is defined to 1, the tz code now 2794 assumes that reading uninitialized memory yields garbage values 2795 but does not cause other problems such as traps. 2796 2797 If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now 2798 more likely to guess right for ambiguous timestamps near 2799 transitions where tm_isdst does not change. 2800 2801 If HAVE_STRFTIME_L is defined to 1, the tz library now defines 2802 strftime_l for compatibility with recent versions of POSIX. 2803 Only the C locale is supported, though. HAVE_STRFTIME_L defaults 2804 to 1 on recent POSIX versions, and to 0 otherwise. 2805 2806 tzselect -c now uses a hybrid distance measure that works better 2807 in Africa. (Thanks to Alan Barrett for noting the problem.) 2808 2809 The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used, 2810 or when time_tz is defined. 2811 2812 When HAVE_UTMPX_H is set the 'date' command now builds on systems 2813 whose <utmpx.h> file does not define WTMPX_FILE, and when setting 2814 the date it updates the wtmpx file if _PATH_WTMPX is defined. 2815 This affects GNU/Linux and similar systems. 2816 2817 For easier maintenance later, some C code has been simplified, 2818 some lint has been removed, and the code has been tweaked so that 2819 plain 'make' is more likely to work. 2820 2821 The C type 'bool' is now used for boolean values, instead of 'int'. 2822 2823 The long-obsolete LOCALE_HOME code has been removed. 2824 2825 The long-obsolete 'gtime' function has been removed. 2826 2827 Changes affecting build procedure 2828 2829 'zdump' no longer links in ialloc.o, as it's not needed. 2830 2831 'make check_time_t_alternatives' no longer assumes GNU diff. 2832 2833 Changes affecting distribution tarballs 2834 2835 The files checktab.awk and zoneinfo2tdf.pl are now distributed in 2836 the tzdata tarball instead of the tzcode tarball, since they help 2837 maintain the data. The NEWS and Theory files are now also 2838 distributed in the tzdata tarball, as they're relevant for data. 2839 (Thanks to Alan Barrett for pointing this out.) Also, the 2840 leapseconds.awk file is no longer distributed in the tzcode 2841 tarball, since it belongs in the tzdata tarball (where 2014f 2842 inadvertently also distributed it). 2843 2844 Changes affecting documentation and commentary 2845 2846 A new file CONTRIBUTING is distributed. (Thanks to Tim Parenti for 2847 suggesting a CONTRIBUTING file, and to Tony Finch and Walter Harms 2848 for debugging it.) 2849 2850 The man pages have been updated to use function prototypes, 2851 to document thread-safe variants like localtime_r, and to document 2852 the NetBSD-inspired functions tzalloc, tzfree, localtime_rz, and 2853 mktime_z. 2854 2855 The fields in Link lines have been renamed to be more descriptive 2856 and more like the parameters of 'ln'. LINK-FROM has become TARGET, 2857 and LINK-TO has become LINK-NAME. 2858 2859 tz-link.htm mentions the IETF's tzdist working group; Windows 2860 Runtime etc. (thanks to Matt Johnson); and HP-UX's tztab. 2861 2862 Some broken URLs have been fixed in the commentary. (Thanks to 2863 Lester Caine.) 2864 2865 Commentary about Philippines DST has been updated, and commentary 2866 on pre-1970 time in India has been added. 2867 2868 2869 Release 2014f - 2014-08-05 17:42:36 -0700 2870 2871 Changes affecting future timestamps 2872 2873 Russia will subtract an hour from most of its time zones on 2014-10-26 2874 at 02:00 local time. (Thanks to Alexander Krivenyshev.) 2875 There are a few exceptions: Magadan Oblast (Asia/Magadan) and Zabaykalsky 2876 Krai are subtracting two hours; conversely, Chukotka Autonomous Okrug 2877 (Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka), Kemerovo Oblast 2878 (Asia/Novokuznetsk), and the Samara Oblast and the Udmurt Republic 2879 (Europe/Samara) are not changing their clocks. The changed zones are 2880 Europe/Kaliningrad, Europe/Moscow, Europe/Simferopol, Europe/Volgograd, 2881 Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk, 2882 Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Khandyga, 2883 Asia/Sakhalin, and Asia/Ust-Nera; Asia/Magadan will have two hours 2884 subtracted; and Asia/Novokuznetsk's time zone abbreviation is affected, 2885 but not its UTC offset. Two zones are added: Asia/Chita (split 2886 from Asia/Yakutsk, and also with two hours subtracted) and 2887 Asia/Srednekolymsk (split from Asia/Magadan, but with only one hour 2888 subtracted). (Thanks to Tim Parenti for much of the above.) 2889 2890 Changes affecting time zone abbreviations 2891 2892 Australian eastern time zone abbreviations are now AEST/AEDT not EST, 2893 and similarly for the other Australian zones. That is, for eastern 2894 standard and daylight saving time the abbreviations are AEST and AEDT 2895 instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT, 2896 and AWST/AWDT are now used instead of the former CST, CWST, and WST. 2897 This change does not affect UT offsets, only time zone abbreviations. 2898 (Thanks to Rich Tibbett and many others.) 2899 2900 Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07) 2901 effective 2014-10-26 at 02:00 local time. 2902 2903 The time zone abbreviation for Xinjiang Time (observed in rmqi) 2904 has been changed from URUT to XJT. (Thanks to Luther Ma.) 2905 2906 Prefer MSK/MSD for Moscow time in Russia, even in other cities. 2907 Similarly, prefer EET/EEST for eastern European time in Russia. 2908 2909 Change time zone abbreviations in (western) Samoa to use "ST" and 2910 "DT" suffixes, as this is more likely to match common practice. 2911 Prefix "W" to (western) Samoa time when its standard-time offset 2912 disagrees with that of American Samoa. 2913 2914 America/Metlakatla now uses PST, not MeST, to abbreviate its time zone. 2915 2916 Time zone abbreviations have been updated for Japan's two time 2917 zones used 1896-1937. JWST now stands for Western Standard 2918 Time, and JCST for Central Standard Time (formerly this was CJT). 2919 These abbreviations are now used for time in Korea, Taiwan, 2920 and Sakhalin while controlled by Japan. 2921 2922 Changes affecting past timestamps 2923 2924 China's five zones have been simplified to two, since the post-1970 2925 differences in the other three seem to have been imaginary. The 2926 zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been 2927 removed; backwards-compatibility links still work, albeit with 2928 different behaviors for timestamps before May 1980. Asia/Urumqi's 2929 1980 transition to UT +08 has been removed, so that it is now at 2930 +06 and not +08. (Thanks to Luther Ma and to Alois Treindl; 2931 Treindl sent helpful translations of two papers by Guo Qingsheng.) 2932 2933 Some zones have been turned into links, when they differed from existing 2934 zones only for older UT offsets where data entries were likely invented. 2935 These changes affect UT offsets in pre-1970 timestamps only. This is 2936 similar to the change in release 2013e, except this time for western 2937 Africa. The affected zones are: Africa/Bamako, Africa/Banjul, 2938 Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome, 2939 Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, and 2940 Atlantic/St_Helena. This also affects the backwards-compatibility 2941 link Africa/Timbuktu. (Thanks to Alan Barrett, Stephen Colebourne, 2942 Tim Parenti, and David Patte for reporting problems in earlier 2943 versions of this change.) 2944 2945 Asia/Shanghai's pre-standard-time UT offset has been changed from 2946 8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its 2947 transition to standard time has been changed from 1928 to 1901. 2948 2949 Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01, 2950 then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945. 2951 In 1946 it observed DST from 05-15 through 09-30; in 1947 2952 from 04-15 through 10-31; and in 1979 from 07-01 through 09-30. 2953 (Thanks to Yu-Cheng Chuang.) 2954 2955 Asia/Riyadh's transition to standard time is now 1947-03-14, not 1950. 2956 2957 Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not 2958 10-03 at 00:00. (Thanks to Konstantin Hyppnen.) 2959 2960 Pacific/Pago_Pago has been changed from UT -11:30 to -11 for the 2961 period from 1911 to 1950. 2962 2963 Pacific/Chatham has been changed to New Zealand standard time plus 2964 45 minutes for the period before 1957, reflecting a 1956 remark in 2965 the New Zealand parliament. 2966 2967 Europe/Budapest has several pre-1946 corrections: in 1918 the transition 2968 out of DST was on 09-16, not 09-29; in 1919 it was on 11-24, not 09-15; in 2969 1945 it was on 11-01, not 11-03; in 1941 the transition to DST was 04-08 2970 not 04-06 at 02:00; and there was no DST in 1920. 2971 2972 Africa/Accra is now assumed to have observed DST from 1920 through 1935. 2973 2974 Time in Russia before 1927 or so has been corrected by a few seconds in 2975 the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi, 2976 Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg, Europe/Helsinki, and 2977 Europe/Riga. Also, Moscow's location has been changed to its Kilometer 0 2978 point. (Thanks to Vladimir Karpinsky for the Moscow changes.) 2979 2980 Changes affecting data format 2981 2982 A new file 'zone1970.tab' supersedes 'zone.tab' in the installed data. 2983 The new file's extended format allows multiple country codes per zone. 2984 The older file is still installed but is deprecated; its format is 2985 not changing and it will still be distributed for a while, but new 2986 applications should use the new file. 2987 2988 The new file format simplifies maintenance of obscure locations. 2989 To test this, it adds coverage for the Crozet Islands and the 2990 Scattered Islands. (Thanks to Tobias Conradi and Antoine Leca.) 2991 2992 The file 'iso3166.tab' is planned to switch from ASCII to UTF-8. 2993 It is still ASCII now, but commentary about the switch has been added. 2994 The new file 'zone1970.tab' already uses UTF-8. 2995 2996 Changes affecting code 2997 2998 'localtime', 'mktime', etc. now use much less stack space if ALL_STATE 2999 is defined. (Thanks to Elliott Hughes for reporting the problem.) 3000 3001 'zic' no longer mishandles input when ignoring case in locales that 3002 are not compatible with English, e.g., unibyte Turkish locales when 3003 compiled with HAVE_GETTEXT. 3004 3005 Error diagnostics of 'zic' and 'yearistype' have been reworded so that 3006 they no longer use ASCII '-' as if it were a dash. 3007 3008 'zic' now rejects output file names that contain '.' or '..' components. 3009 (Thanks to Tim Parenti for reporting the problem.) 3010 3011 'zic -v' now warns about output file names that do not follow 3012 POSIX rules, or that contain a digit or '.'. (Thanks to Arthur 3013 David Olson for starting the ball rolling on this.) 3014 3015 Some lint has been removed when using GCC_DEBUG_FLAGS with GCC 4.9.0. 3016 3017 Changes affecting build procedure 3018 3019 'zic' no longer links in localtime.o and asctime.o, as they're not needed. 3020 (Thanks to John Cochran.) 3021 3022 Changes affecting documentation and commentary 3023 3024 The 'Theory' file documents legacy names, the longstanding 3025 exceptions to the POSIX-inspired file name rules. 3026 3027 The 'zic' documentation clarifies the role of time types when 3028 interpreting dates. (Thanks to Arthur David Olson.) 3029 3030 Documentation and commentary now prefer UTF-8 to US-ASCII, 3031 allowing the use of proper accents in foreign words and names. 3032 Code and data have not changed because of this. (Thanks to 3033 Garrett Wollman, Ian Abbott, and Guy Harris for helping to debug 3034 this.) 3035 3036 Non-HTML documentation and commentary now use plain-text URLs instead of 3037 HTML insertions, and are more consistent about bracketing URLs when they 3038 are not already surrounded by white space. (Thanks to suggestions by 3039 Steffen Nurpmeso.) 3040 3041 There is new commentary about Xujiahui Observatory, the five time-zone 3042 project in China from 1918 to 1949, timekeeping in Japanese-occupied 3043 Shanghai, and Tibet Time in the 1950s. The sharp-eyed can spot the 3044 warlord Jin Shuren in the data. 3045 3046 Commentary about the coverage of each Russian zone has been standardized. 3047 (Thanks to Tim Parenti.) 3048 3049 There is new commentary about contemporary timekeeping in Ethiopia. 3050 3051 Obsolete comments about a 2007 proposal for DST in Kuwait has been removed. 3052 3053 There is new commentary about time in Poland in 1919. 3054 3055 Proper credit has been given to DST inventor George Vernon Hudson. 3056 3057 Commentary about time in Metlakatla, AK and Resolute, NU has been 3058 improved, with a new source for the former. 3059 3060 In zone.tab, Pacific/Easter no longer mentions Salas y Gmez, as it 3061 is uninhabited. 3062 3063 Commentary about permanent Antarctic bases has been updated. 3064 3065 Several typos have been corrected. (Thanks to Tim Parenti for 3066 contributing some of these fixes.) 3067 3068 tz-link.htm now mentions the JavaScript libraries Moment Timezone, 3069 TimezoneJS.Date, Walltime-js, and Timezone. (Thanks to a heads-up 3070 from Matt Johnson.) Also, it mentions the Go 'latlong' package. 3071 (Thanks to a heads-up from Dirkjan Ochtman.) 3072 3073 The files usno1988, usno1989, usno1989a, usno1995, usno1997, and usno1998 3074 have been removed. These obsolescent US Naval Observatory entries were no 3075 longer helpful for maintenance. (Thanks to Tim Parenti for the suggestion.) 3076 3077 3078 Release 2014e - 2014-06-12 21:53:52 -0700 3079 3080 Changes affecting near-future timestamps 3081 3082 Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00. 3083 (Thanks to Imed Chihi.) Guess that from 2015 on Egypt will temporarily 3084 switch to standard time at 24:00 the last Thursday before Ramadan, and 3085 back to DST at 00:00 the first Friday after Ramadan. 3086 3087 Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00. (Thanks 3088 to Milamber Space Network.) Guess that from 2015 on Morocco will 3089 temporarily switch to standard time at 03:00 the last Saturday before 3090 Ramadan, and back to DST at 02:00 the first Saturday after Ramadan. 3091 3092 Changes affecting past timestamps 3093 3094 The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of 3095 "MSD" for Moscow's double daylight time in summer 1921. Also, a typo 3096 "VLASST" has been repaired to be "VLAST" for Vladivostok summer time 3097 in 1991. (Thanks to Hank W. for reporting the problems.) 3098 3099 Changes affecting commentary 3100 3101 tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the 3102 draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and 3103 removes stale pointers to World Time Explorer and WORLDTIME. 3104 3105 3106 Release 2014d - 2014-05-27 21:34:40 -0700 3107 3108 Changes affecting code 3109 3110 zic no longer generates files containing timestamps before the Big Bang. 3111 This works around GNOME glib bug 878 3112 <https://gitlab.gnome.org/GNOME/glib/issues/878> 3113 (Thanks to Leonardo Chiquitto for reporting the bug, and to 3114 Arthur David Olson and James Cloos for suggesting improvements to the fix.) 3115 3116 Changes affecting documentation 3117 3118 tz-link.htm now mentions GNOME. 3119 3120 3121 Release 2014c - 2014-05-13 07:44:13 -0700 3122 3123 Changes affecting near-future timestamps 3124 3125 Egypt observes DST starting 2014-05-15 at 24:00. 3126 (Thanks to Ahmad El-Dardiry and Gunther Vermier.) 3127 Details have not been announced, except that DST will not be observed 3128 during Ramadan. Guess that DST will stop during the same Ramadan dates as 3129 Morocco, and that Egypt's future spring and fall transitions will be the 3130 same as 2010 when it last observed DST, namely April's last Friday at 3131 00:00 to September's last Thursday at 23:00 standard time. Also, guess 3132 that Ramadan transitions will be at 00:00 standard time. 3133 3134 Changes affecting code 3135 3136 zic now generates transitions for minimum time values, eliminating guesswork 3137 when handling low-valued timestamps. (Thanks to Arthur David Olson.) 3138 3139 Port to Cygwin sans glibc. (Thanks to Arthur David Olson.) 3140 3141 Changes affecting commentary and documentation 3142 3143 Remove now-confusing comment about Jordan. (Thanks to Oleksii Nochovnyi.) 3144 3145 3146 Release 2014b - 2014-03-24 21:28:50 -0700 3147 3148 Changes affecting near-future timestamps 3149 3150 Crimea switches to Moscow time on 2014-03-30 at 02:00 local time. 3151 (Thanks to Alexander Krivenyshev.) Move its zone.tab entry from UA to RU. 3152 3153 New entry for Troll station, Antarctica. (Thanks to Paul-Inge Flakstad and 3154 Bengt-Inge Larsson.) This is currently an approximation; a better version 3155 will require the zic and localtime fixes mentioned below, and the plan is 3156 to wait for a while until at least the zic fixes propagate. 3157 3158 Changes affecting code 3159 3160 'zic' and 'localtime' no longer reject locations needing four transitions 3161 per year for the foreseeable future. (Thanks to Andrew Main (Zefram).) 3162 Also, 'zic' avoids some unlikely failures due to integer overflow. 3163 3164 Changes affecting build procedure 3165 3166 'make check' now detects Rule lines defined but never used. 3167 The NZAQ rules, an instance of this problem, have been removed. 3168 3169 Changes affecting commentary and documentation 3170 3171 Fix Tuesday/Thursday typo in description of time in Israel. 3172 (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.) 3173 3174 Microsoft Windows 8.1 doesn't support tz database names. (Thanks 3175 to Donald MacQueen.) Instead, the Microsoft Windows Store app 3176 library supports them. 3177 3178 Add comments about Johnston Island time in the 1960s. 3179 (Thanks to Lyle McElhaney.) 3180 3181 Morocco's 2014 DST start will be as predicted. 3182 (Thanks to Sebastien Willemijns.) 3183 3184 3185 Release 2014a - 2014-03-07 23:30:29 -0800 3186 3187 Changes affecting near-future timestamps 3188 3189 Turkey begins DST on 2014-03-31, not 03-30. (Thanks to Faruk Pasin for 3190 the heads-up, and to Tim Parenti for simplifying the update.) 3191 3192 Changes affecting past timestamps 3193 3194 Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00. 3195 (Thanks to Steffen Thorsen.) 3196 3197 Ukraine switched from Moscow to Eastern European time on 1990-07-01 3198 (not 1992-01-01), and observed DST during the entire next winter. 3199 (Thanks to Vladimir in Moscow via Alois Treindl.) 3200 3201 In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03. 3202 (Thanks to Avigdor Finkelstein.) 3203 3204 Changes affecting code 3205 3206 A uninitialized-storage bug in 'localtime' has been fixed. 3207 (Thanks to Logan Chien.) 3208 3209 Changes affecting the build procedure 3210 3211 The settings for 'make check_web' now default to Ubuntu 13.10. 3212 3213 Changes affecting commentary and documentation 3214 3215 The boundary of the US Pacific time zone is given more accurately. 3216 (Thanks to Alan Mintz.) 3217 3218 Chile's 2014 DST will be as predicted. (Thanks to Jos Miguel Garrido.) 3219 3220 Paraguay's 2014 DST will be as predicted. (Thanks to Carlos Ral Perasso.) 3221 3222 Better descriptions of countries with same time zone history as 3223 Trinidad and Tobago since 1970. (Thanks to Alan Barrett for suggestion.) 3224 3225 Several changes affect tz-link.htm, the main web page. 3226 3227 Mention Time.is (thanks to Even Scharning) and WX-now (thanks to 3228 David Braverman). 3229 3230 Mention xCal (Internet RFC 6321) and jCal. 3231 3232 Microsoft has some support for tz database names. 3233 3234 CLDR data formats include both XML and JSON. 3235 3236 Mention Maggiolo's map of solar vs standard time. 3237 (Thanks to Arthur David Olson.) 3238 3239 Mention TZ4Net. (Thanks to Matt Johnson.) 3240 3241 Mention the timezone-olson Haskell package. 3242 3243 Mention zeitverschiebung.net. (Thanks to Martin Jger.) 3244 3245 Remove moribund links to daylight-savings-time.info and to 3246 Simple Timer + Clocks. 3247 3248 Update two links. (Thanks to Oscar van Vlijmen.) 3249 3250 Fix some formatting glitches, e.g., remove random newlines from 3251 abbr elements' title attributes. 3252 3253 3254 Release 2013i - 2013-12-17 07:25:23 -0800 3255 3256 Changes affecting near-future timestamps: 3257 3258 Jordan switches back to standard time at 00:00 on December 20, 2013. 3259 The 2006-2011 transition schedule is planned to resume in 2014. 3260 (Thanks to Steffen Thorsen.) 3261 3262 Changes affecting past timestamps: 3263 3264 In 2004, Cuba began DST on March 28, not April 4. 3265 (Thanks to Steffen Thorsen.) 3266 3267 Changes affecting code 3268 3269 The compile-time flag NOSOLAR has been removed, as nowadays the 3270 benefit of slightly shrinking runtime table size is outweighed by the 3271 cost of disallowing potential future updates that exceed old limits. 3272 3273 Changes affecting documentation and commentary 3274 3275 The files solar87, solar88, and solar89 are no longer distributed. 3276 They were a negative experiment - that is, a demonstration that 3277 tz data can represent solar time only with some difficulty and error. 3278 Their presence in the distribution caused confusion, as Riyadh 3279 civil time was generally not solar time in those years. 3280 3281 tz-link.htm now mentions Noda Time. (Thanks to Matt Johnson.) 3282 3283 3284 Release 2013h - 2013-10-25 15:32:32 -0700 3285 3286 Changes affecting current and future timestamps: 3287 3288 Libya has switched its UT offset back to +02 without DST, instead 3289 of +01 with DST. (Thanks to Even Scharning.) 3290 3291 Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules. 3292 (Thanks to Gwillim Law.) 3293 3294 Changes affecting future timestamps: 3295 3296 Acre and (we guess) western Amazonas will switch from UT -04 to -05 3297 on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe. 3298 (Thanks to Steffen Thorsen.) 3299 3300 Add entries for DST transitions in Morocco in the year 2038. 3301 This avoids some year-2038 glitches introduced in 2013g. 3302 (Thanks to Yoshito Umaoka for reporting the problem.) 3303 3304 Changes affecting API 3305 3306 The 'tzselect' command no longer requires the 'select' command, 3307 and should now work with /bin/sh on more platforms. It also works 3308 around a bug in BusyBox awk before version 1.21.0. (Thanks to 3309 Patrick 'P. J.' McDermott and Alan Barrett.) 3310 3311 Changes affecting code 3312 3313 Fix localtime overflow bugs with 32-bit unsigned time_t. 3314 3315 zdump no longer assumes sscanf returns maximal values on overflow. 3316 3317 Changes affecting the build procedure 3318 3319 The builder can specify which programs to use, if any, instead of 3320 'ar' and 'ranlib', and libtz.a is now built locally before being 3321 installed. (Thanks to Michael Forney.) 3322 3323 A dependency typo in the 'zdump' rule has been fixed. 3324 (Thanks to Andrew Paprocki.) 3325 3326 The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f' 3327 work as specified by POSIX.2-1992 or later; this is portable nowadays. 3328 3329 'make clean' no longer removes 'leapseconds', since it's 3330 host-independent and is part of the distribution. 3331 3332 The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed. 3333 3334 Changes affecting documentation and commentary 3335 3336 tz-link.htm now mentions TC TIMEZONE's draft time zone service protocol 3337 (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle). 3338 3339 Update URLs in tz-link page. Add URLs for Microsoft Windows, since 3340 8.1 introduces tz support. Remove URLs for Tru64 and UnixWare (no 3341 longer maintained) and for old advisories. SOFA now does C. 3342 3343 Release 2013g - 2013-09-30 21:08:26 -0700 3344 3345 Changes affecting current and near-future timestamps 3346 3347 Morocco now observes DST from the last Sunday in March to the last 3348 Sunday in October, not April to September respectively. (Thanks 3349 to Steffen Thorsen.) 3350 3351 Changes affecting 'zic' 3352 3353 'zic' now runs on platforms that lack both hard links and symlinks. 3354 (Thanks to Theo Veenker for reporting the problem, for MinGW.) 3355 Also, fix some bugs on platforms that lack hard links but have symlinks. 3356 3357 'zic -v' again warns that Asia/Tehran has no POSIX environment variable 3358 to predict the far future, fixing a bug introduced in 2013e. 3359 3360 Changes affecting the build procedure 3361 3362 The 'leapseconds' file is again put into the tzdata tarball. 3363 Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to 3364 Matt Burgess and Ian Abbott.) The timestamps of these and other 3365 dependent files in tarballs are adjusted more consistently. 3366 3367 Changes affecting documentation and commentary 3368 3369 The README file is now part of the data tarball as well as the code. 3370 It now states that files are public domain unless otherwise specified. 3371 (Thanks to Andrew Main (Zefram) for asking for clarifications.) 3372 Its details about the 1989 release moved to a place of honor near 3373 the end of NEWS. 3374 3375 3376 Release 2013f - 2013-09-24 23:37:36 -0700 3377 3378 Changes affecting near-future timestamps 3379 3380 Tocantins will very likely not observe DST starting this spring. 3381 (Thanks to Steffen Thorsen.) 3382 3383 Jordan will likely stay at UT +03 indefinitely, and will not fall 3384 back this fall. 3385 3386 Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.) 3387 3388 Changes affecting API 3389 3390 The types of the global variables 'timezone' and 'altzone' (if present) 3391 have been changed back to 'long'. This is required for 'timezone' 3392 by POSIX, and for 'altzone' by common practice, e.g., Solaris 11. 3393 These variables were originally 'long' in the tz code, but were 3394 mistakenly changed to 'time_t' in 1987; nobody reported the 3395 incompatibility until now. The difference matters on x32, where 3396 'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.) 3397 3398 Changes affecting the build procedure 3399 3400 Avoid long strings in leapseconds.awk to work around a mawk bug. 3401 (Thanks to Cyril Baurand.) 3402 3403 Changes affecting documentation and commentary 3404 3405 New file 'NEWS' that contains release notes like this one. 3406 3407 Paraguay's law does not specify DST transition time; 00:00 is customary. 3408 (Thanks to Waldemar Villamayor-Venialbo.) 3409 3410 Minor capitalization fixes. 3411 3412 Changes affecting version-control only 3413 3414 The experimental GitHub repository now contains annotated and 3415 signed tags for recent releases, e.g., '2013e' for Release 2013e. 3416 Releases are tagged starting with 2012e; earlier releases were 3417 done differently, and tags would either not have a simple name or 3418 not exactly match what was released. 3419 3420 'make set-timestamps' is now simpler and a bit more portable. 3421 3422 3423 Release 2013e - 2013-09-19 23:50:04 -0700 3424 3425 Changes affecting near-future timestamps 3426 3427 This year Fiji will start DST on October 27, not October 20. 3428 (Thanks to David Wheeler for the heads-up.) For now, guess that 3429 Fiji will continue to spring forward the Sunday before the fourth 3430 Monday in October. 3431 3432 Changes affecting current and future time zone abbreviations 3433 3434 Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian 3435 time zone abbreviations since 1932. (Thanks to George Ziegler, 3436 Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and 3437 Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura, 3438 Asia/Makassar, and Asia/Pontianak. 3439 3440 Use ART (UT -03, standard time), rather than WARST (also -03, but 3441 daylight saving time) for San Luis, Argentina since 2009. 3442 3443 Changes affecting Godthb timestamps after 2037 if version mismatch 3444 3445 Allow POSIX-like TZ strings where the transition time's hour can 3446 range from -167 through 167, instead of the POSIX-required 0 3447 through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the 3448 new Fiji rules. This is a more-compact way to represent 3449 far-future timestamps for America/Godthab, America/Santiago, 3450 Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem, 3451 Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by 3452 this change. (Derived from a suggestion by Arthur David Olson.) 3453 3454 Allow POSIX-like TZ strings where daylight saving time is in 3455 effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western 3456 Argentina Summer Time all year. This supports a more-compact way 3457 to represent the 2013d data for America/Argentina/San_Luis. 3458 Because of the change for San Luis noted above this change does not 3459 affect the current data. (Thanks to Andrew Main (Zefram) for 3460 suggestions that improved this change.) 3461 3462 Where these two TZ changes take effect, there is a minor extension 3463 to the tz file format in that it allows new values for the 3464 embedded TZ-format string, and the tz file format version number 3465 has therefore been increased from 2 to 3 as a precaution. 3466 Version-2-based client code should continue to work as before for 3467 all timestamps before 2038. Existing version-2-based client code 3468 (tzcode, GNU/Linux, Solaris) has been tested on version-3-format 3469 files, and typically works in practice even for timestamps after 3470 2037; the only known exception is America/Godthab. 3471 3472 Changes affecting timestamps before 1970 3473 3474 Pacific/Johnston is now a link to Pacific/Honolulu. This corrects 3475 some errors before 1947. 3476 3477 Some zones have been turned into links, when they differ from existing 3478 zones only in older data entries that were likely invented or that 3479 differ only in LMT or transitions from LMT. These changes affect 3480 only timestamps before 1943. The affected zones are: 3481 Africa/Juba, America/Anguilla, America/Aruba, America/Dominica, 3482 America/Grenada, America/Guadeloupe, America/Marigot, 3483 America/Montserrat, America/St_Barthelemy, America/St_Kitts, 3484 America/St_Lucia, America/St_Thomas, America/St_Vincent, 3485 America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for 3486 confirming that the old Europe/Vaduz zone was wrong and the new 3487 link is better for WWII-era times.) 3488 3489 Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects 3490 America/Cayman, America/Jamaica and America/Grand_Turk timestamps 3491 from 1890 to 1912. 3492 3493 Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46. 3494 This affects Europe/Zurich timestamps from 1853 to 1894. (Thanks 3495 to Alois Treindl.) 3496 3497 Change the date of the circa-1850 Zurich transition from 1849-09-12 3498 to 1853-07-16, overriding Shanks with data from Messerli about 3499 postal and telegraph time in Switzerland. 3500 3501 Changes affecting time zone abbreviations before 1970 3502 3503 For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932, 3504 as Jakarta was called Batavia back then. 3505 3506 Changes affecting API 3507 3508 The 'zic' command now outputs a dummy transition when far-future 3509 data can't be summarized using a TZ string, and uses a 402-year 3510 window rather than a 400-year window. For the current data, this 3511 affects only the Asia/Tehran file. It does not affect any of the 3512 timestamps that this file represents, so zdump outputs the same 3513 information as before. (Thanks to Andrew Main (Zefram).) 3514 3515 The 'date' command has a new '-r' option, which lets you specify 3516 the integer time to display, a la FreeBSD. 3517 3518 The 'tzselect' command has two new options '-c' and '-n', which lets you 3519 select a zone based on latitude and longitude. 3520 3521 The 'zic' command's '-v' option now warns about constructs that 3522 require the new version-3 binary file format. (Thanks to Arthur 3523 David Olson for the suggestion.) 3524 3525 Support for floating-point time_t has been removed. 3526 It was always dicey, and POSIX no longer requires it. 3527 (Thanks to Eric Blake for suggesting to the POSIX committee to 3528 remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy 3529 Heninger, Arthur David Olson, and Alois Treindl, for reporting 3530 bugs and elucidating some of the corners of the old floating-point 3531 implementation.) 3532 3533 The signatures of 'offtime', 'timeoff', and 'gtime' have been 3534 changed back to the old practice of using 'long' to represent UT 3535 offsets. This had been inadvertently and mistakenly changed to 3536 'int_fast32_t'. (Thanks to Christos Zoulas.) 3537 3538 The code avoids undefined behavior on integer overflow in some 3539 more places, including gmtime, localtime, mktime and zdump. 3540 3541 Changes affecting the zdump utility 3542 3543 zdump now outputs "UT" when referring to Universal Time, not "UTC". 3544 "UTC" does not make sense for timestamps that predate the introduction 3545 of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen 3546 for clarifying UT vs UTC.) 3547 3548 Data changes affecting behavior of tzselect and similar programs 3549 3550 Country code BQ is now called the more-common name "Caribbean Netherlands" 3551 rather than the more-official "Bonaire, St Eustatius & Saba". 3552 3553 Remove from zone.tab the names America/Montreal, America/Shiprock, 3554 and Antarctica/South_Pole, as they are equivalent to existing 3555 same-country-code zones for post-1970 timestamps. The data entries for 3556 these names are unchanged, so the names continue to work as before. 3557 3558 Changes affecting code internals 3559 3560 zic -c now runs way faster on 64-bit hosts when given large numbers. 3561 3562 zic now uses vfprintf to avoid allocating and freeing some memory. 3563 3564 tzselect now computes the list of continents from the data, 3565 rather than have it hard-coded. 3566 3567 Minor changes pacify GCC 4.7.3 and GCC 4.8.1. 3568 3569 Changes affecting the build procedure 3570 3571 The 'leapseconds' file is now generated automatically from a 3572 new file 'leap-seconds.list', which is a copy of 3573 <ftp://ftp.nist.gov/pub/time/leap-seconds.list> 3574 A new source file 'leapseconds.awk' implements this. 3575 The goal is simplification of the future maintenance of 'leapseconds'. 3576 3577 When building the 'posix' or 'right' subdirectories, if the 3578 subdirectory would be a copy of the default subdirectory, it is 3579 now made a symbolic link if that is supported. This saves about 3580 2 MB of file system space. 3581 3582 The links America/Shiprock and Antarctica/South_Pole have been 3583 moved to the 'backward' file. This affects only nondefault builds 3584 that omit 'backward'. 3585 3586 Changes affecting version-control only 3587 3588 .gitignore now ignores 'date'. 3589 3590 Changes affecting documentation and commentary 3591 3592 Changes to the 'tzfile' man page 3593 3594 It now mentions that the binary file format may be extended in 3595 future versions by appending data. 3596 3597 It now refers to the 'zdump' and 'zic' man pages. 3598 3599 Changes to the 'zic' man page 3600 3601 It lists conditions that elicit a warning with '-v'. 3602 3603 It says that the behavior is unspecified when duplicate names 3604 are given, or if the source of one link is the target of another. 3605 3606 Its examples are updated to match the latest data. 3607 3608 The definition of white space has been clarified slightly. 3609 (Thanks to Michael Deckers.) 3610 3611 Changes to the 'Theory' file 3612 3613 There is a new section about the accuracy of the tz database, 3614 describing the many ways that errors can creep in, and 3615 explaining why so many of the pre-1970 timestamps are wrong or 3616 misleading (thanks to Steve Allen, Lester Caine, and Garrett 3617 Wollman for discussions that contributed to this). 3618 3619 The 'Theory' file describes LMT better (this follows a 3620 suggestion by Guy Harris). 3621 3622 It refers to the 2013 edition of POSIX rather than the 2004 edition. 3623 3624 It's mentioned that excluding 'backward' should not affect the 3625 other data, and it suggests at least one zone.tab name per 3626 inhabited country (thanks to Stephen Colebourne). 3627 3628 Some longstanding restrictions on names are documented, e.g., 3629 'America/New_York' precludes 'America/New_York/Bronx'. 3630 3631 It gives more reasons for the 1970 cutoff. 3632 3633 It now mentions which time_t variants are supported, such as 3634 signed integer time_t. (Thanks to Paul Goyette for reporting 3635 typos in an experimental version of this change.) 3636 3637 (Thanks to Philip Newton for correcting typos in these changes.) 3638 3639 Documentation and commentary is more careful to distinguish UT in 3640 general from UTC in particular. (Thanks to Steve Allen.) 3641 3642 Add a better source for the Zurich 1894 transition. 3643 (Thanks to Pierre-Yves Berger.) 3644 3645 Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.) 3646 3647 3648 Release 2013d - 2013-07-05 07:38:01 -0700 3649 3650 Changes affecting future timestamps: 3651 3652 Morocco's midsummer transitions this year are July 7 and August 10, 3653 not July 9 and August 8. (Thanks to Andrew Paprocki.) 3654 3655 Israel now falls back on the last Sunday of October. 3656 (Thanks to Ephraim Silverberg.) 3657 3658 Changes affecting past timestamps: 3659 3660 Specify Jerusalem's location more precisely; this changes the pre-1880 3661 times by 2 s. 3662 3663 Changing affecting metadata only: 3664 3665 Fix typos in the entries for country codes BQ and SX. 3666 3667 Changes affecting code: 3668 3669 Rework the code to fix a bug with handling Australia/Macquarie on 3670 32-bit hosts (thanks to Arthur David Olson). 3671 3672 Port to platforms like NetBSD, where time_t can be wider than long. 3673 3674 Add support for testing time_t types other than the system's. 3675 Run 'make check_time_t_alternatives' to try this out. 3676 Currently, the tests fail for unsigned time_t; 3677 this should get fixed at some point. 3678 3679 Changes affecting documentation and commentary: 3680 3681 Deemphasize the significance of national borders. 3682 3683 Update the zdump man page. 3684 3685 Remove obsolete NOID comment (thanks to Denis Excoffier). 3686 3687 Update several URLs and comments in the web pages. 3688 3689 Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler). 3690 3691 Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka). 3692 3693 3694 Release 2013c - 2013-04-19 16:17:40 -0700 3695 3696 Changes affecting current and future timestamps: 3697 3698 Palestine observed DST starting March 29, 2013. (Thanks to 3699 Steffen Thorsen.) From 2013 on, Gaza and Hebron both observe DST, 3700 with the predicted rules being the last Thursday in March at 24:00 3701 to the first Friday on or after September 21 at 01:00. 3702 3703 Assume that the recent change to Paraguay's DST rules is permanent, 3704 by moving the end of DST to the 4th Sunday in March every year. 3705 (Thanks to Carlos Ral Perasso.) 3706 3707 Changes affecting past timestamps: 3708 3709 Fix some historical data for Palestine to agree with that of 3710 timeanddate.com, as follows: 3711 3712 The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not 3713 00:00 Apr 1. 3714 3715 The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not 3716 02:00. 3717 3718 The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27. 3719 3720 The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2. 3721 3722 The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01. 3723 3724 The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00. 3725 3726 Fix times of habitation for Macquarie to agree with the Tasmania 3727 Parks & Wildlife Service history, which indicates that permanent 3728 habitation was 1899-1919 and 1948 on. 3729 3730 Changing affecting metadata only: 3731 3732 Macquarie Island is politically part of Australia, not Antarctica. 3733 (Thanks to Tobias Conradi.) 3734 3735 Sort Macquarie more-consistently with other parts of Australia. 3736 (Thanks to Tim Parenti.) 3737 3738 3739 Release 2013b - 2013-03-10 22:33:40 -0700 3740 3741 Changes affecting current and future timestamps: 3742 3743 Haiti uses US daylight-saving rules this year, and presumably future years. 3744 This changes timestamps starting today. (Thanks to Steffen Thorsen.) 3745 3746 Paraguay will end DST on March 24 this year. 3747 (Thanks to Steffen Thorsen.) For now, assume it's just this year. 3748 3749 Morocco does not observe DST during Ramadan; 3750 try to predict Ramadan in Morocco as best we can. 3751 (Thanks to Erik Homoet for the heads-up.) 3752 3753 Changes affecting commentary: 3754 3755 Update URLs in tz-link page. Add URLs for webOS, BB10, iOS. 3756 Update URL for Solaris. Mention Internet RFC 6557. 3757 Update Internet RFCs 2445->5545, 2822->5322. 3758 Switch from FTP to HTTP for Internet RFCs. 3759 3760 3761 Release 2013a - 2013-02-27 09:20:35 -0800 3762 3763 Change affecting binary data format: 3764 3765 The zone offset at the end of version-2-format zone files is now 3766 allowed to be 24:00, as per POSIX.1-2008. (Thanks to Arthur David Olson.) 3767 3768 Changes affecting current and future timestamps: 3769 3770 Chile's 2013 rules, and we guess rules for 2014 and later, will be 3771 the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC. 3772 (Thanks to Steffen Thorsen and Robert Elz.) 3773 3774 New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen. 3775 (Thanks to Tobias Conradi and Arthur David Olson.) 3776 3777 Many changes affect historical timestamps before 1940. 3778 These were deduced from: Milne J. Civil time. Geogr J. 1899 3779 Feb;13(2):173-94 <https://www.jstor.org/stable/1774359>. 3780 3781 Changes affecting the code: 3782 3783 Fix zic bug that mishandled Egypt's 2010 changes (this also affected 3784 the data). (Thanks to Arthur David Olson.) 3785 3786 Fix localtime bug when time_t is unsigned and data files were generated 3787 by a signed time_t system. (Thanks to Doug Bailey for reporting and 3788 to Arthur David Olson for fixing.) 3789 3790 Allow the email address for bug reports to be set by the packager. 3791 The default is tz (a] iana.org, as before. (Thanks to Joseph S. Myers.) 3792 3793 Update HTML checking to be compatible with Ubuntu 12.10. 3794 3795 Check that files are a safe subset of ASCII. At some point we may 3796 relax this requirement to a safe subset of UTF-8. Without the 3797 check, some non-UTF-8 encodings were leaking into the distribution. 3798 3799 Commentary changes: 3800 3801 Restore a comment about copyright notices that was inadvertently deleted. 3802 (Thanks to Arthur David Olson.) 3803 3804 Improve the commentary about which districts observe what times 3805 in Russia. (Thanks to Oscar van Vlijmen and Arthur David Olson.) 3806 3807 Add web page links to tz.js. 3808 3809 Add "Run by the Monkeys" to tz-art. (Thanks to Arthur David Olson.) 3810 3811 3812 Release 2012j - 2012-11-12 18:34:49 -0800 3813 3814 Libya moved to CET this weekend, but with DST planned next year. 3815 (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.) 3816 3817 Signatures now have the extension .asc, not .sign, as that's more 3818 standard. (Thanks to Phil Pennock.) 3819 3820 The output of 'zdump --version', and of 'zic --version', now 3821 uses a format that is more typical for --version. 3822 (Thanks to Joseph S. Myers.) 3823 3824 The output of 'tzselect --help', 'zdump --help', and 'zic --help' 3825 now uses tz (a] iana.org rather than the old elsie address. 3826 3827 zic -v now complains about abbreviations that are less than 3 3828 or more than 6 characters, as per Posix. Formerly, it checked 3829 for abbreviations that were more than 3. 3830 3831 'make public' no longer puts its temporary directory under /tmp, 3832 and uses the just-built zic rather than the system zic. 3833 3834 Various fixes to documentation and commentary. 3835 3836 3837 Release 2012i - 2012-11-03 12:57:09 -0700 3838 3839 Cuba switches from DST tomorrow at 01:00. (Thanks to Steffen Thorsen.) 3840 3841 Linker flags can now be specified via LDFLAGS. 3842 AWK now defaults to 'awk', not 'nawk'. 3843 The shell in tzselect now defaults to /bin/bash, but this can 3844 be overridden by specifying KSHELL. 3845 The main web page now mentions the unofficial GitHub repository. 3846 (Thanks to Mike Frysinger.) 3847 3848 Tarball signatures can now be built by running 'make signatures'. 3849 There are also new makefile rules 'tarballs', 'check_public', and 3850 separate makefile rules for each tarball and signature file. 3851 A few makefile rules are now more portable to strict POSIX. 3852 3853 The main web page now lists the canonical IANA URL. 3854 3855 3856 Release 2012h - 2012-10-26 22:49:10 -0700 3857 3858 Bahia no longer has DST. (Thanks to Kelley Cook.) 3859 3860 Tocantins has DST. (Thanks to Rodrigo Severo.) 3861 3862 Israel has new DST rules next year. (Thanks to Ephraim Silverberg.) 3863 3864 Jordan stays on DST this winter. (Thanks to Steffen Thorsen.) 3865 3866 Web page updates. 3867 3868 More C modernization, except that at Arthur David Olson's suggestion 3869 the instances of 'register' were kept. 3870 3871 3872 Release 2012g - 2012-10-17 20:59:45 -0700 3873 3874 Samoa fall 2012 and later. (Thanks to Nicholas Pereira and Robert Elz.) 3875 3876 Palestine fall 2012. (Thanks to Steffen Thorsen.) 3877 3878 Assume C89. 3879 3880 To attack the version-number problem, this release ships the file 3881 'Makefile' (which contains the release number) in both the tzcode and 3882 the tzdata tarballs. The two Makefiles are identical, and should be 3883 identical in any matching pair of tarballs, so it shouldn't matter 3884 which order you extract the tarballs. Perhaps we can come up with a 3885 better version-number scheme at some point; this scheme does have the 3886 virtue of not adding more files. 3887 3888 3889 Release 2012f - 2012-09-12 23:17:03 -0700 3890 3891 * australasia (Pacific/Fiji): Fiji DST is October 21 through January 3892 20 this year. (Thanks to Steffen Thorsen.) 3893 3894 3895 Release 2012e - 2012-08-02 20:44:55 -0700 3896 3897 * australasia (Pacific/Fakaofo): Tokelau is UT +13, not +14. 3898 (Thanks to Steffen Thorsen.) 3899 3900 * Use a single version number for both code and data. 3901 3902 * .gitignore: New file. 3903 3904 * Remove trailing white space. 3905 3906 3907 Release code2012c-data2012d - 2012-07-19 16:35:33 -0700 3908 3909 Changes for Morocco's timestamps, which take effect in a couple of 3910 hours, along with infrastructure changes to accommodate how the tz 3911 code and data are released on IANA. 3912 3913 3914 Release data2012c - 2012-03-27 12:17:25 -0400 3915 3916 africa 3917 Summer time changes for Morocco (to start late April 2012) 3918 3919 asia 3920 Changes for 2012 for Gaza & the West Bank (Hebron) and Syria 3921 3922 northamerica 3923 Haiti following US/Canada rules for 2012 (and we're assuming, 3924 for now anyway, for the future). 3925 3926 3927 Release 2012b - 2012-03-02 12:29:15 +0700 3928 3929 There is just one change to tzcode2012b (compared with 2012a): 3930 the Makefile that was accidentally included with 2012a has been 3931 replaced with the version that should have been there, which is 3932 identical with the previous version (from tzcode2011i). 3933 3934 There are just two changes in tzdata2012b compared with 2012a. 3935 3936 Most significantly, summer time in Cuba has been delayed 3 weeks 3937 (now starts April 1 rather than March 11). Since Mar 11 (the old start 3938 date, as listed in 2012a) is just a little over a week away, this 3939 change is urgent. 3940 3941 Less importantly, an excess tab in one of the changes in zone.tab 3942 in 2012a has been removed. 3943 3944 3945 Release 2012a - 2012-03-01 18:28:10 +0700 3946 3947 The changes in tzcode2012a (compared to the previous version, 2011i) 3948 are entirely to the README and tz-art.htm and tz-link.htm files, if 3949 none of those concern you, you can ignore the code update. The changes 3950 reflect the changed addresses for the mailing list and the code and 3951 data distribution points & methods (and a link to DateTime::TimeZone::Tzfile 3952 has been added to tz-link.htm). 3953 3954 In tzdata2012a (compared to the previous release, which was 2011n) 3955 the major changes are: 3956 Chile 2011/2012 and 2012/2013 summer time date adjustments. 3957 Falkland Islands onto permanent summer time (we're assuming for the 3958 foreseeable future, though 2012 is all we're fairly certain of.) 3959 Armenia has abolished Summer Time. 3960 Tokelau jumped the International Date Line back last December 3961 (just the same as their near neighbour, Samoa). 3962 America/Creston is a new zone for a small area of British Columbia 3963 There will be a leapsecond 2012-06-30 23:59:60 UTC. 3964 3965 Other minor changes are: 3966 Corrections to 1918 Canadian summer time end dates. 3967 Updated URL for UK time zone history (in comments) 3968 A few typos in Le Corre's list of free French place names (comments) 3969 3970 3971 Release data2011n - 2011-10-30 14:57:54 +0700 3972 3973 There are three changes of note - most urgently, Cuba (America/Havana) 3974 has extended summer time by two weeks, now to end on Nov 13, rather than 3975 the (already past) Oct 30. Second, the Pridnestrovian Moldavian Republic 3976 (Europe/Tiraspol) decided not to split from the rest of Moldova after 3977 all, and consequently that zone has been removed (again) and reinstated 3978 in the "backward" file as a link to Europe/Chisinau. And third, the 3979 end date for Fiji's summer time this summer was moved forward from the 3980 earlier planned Feb 26, to Jan 22. 3981 3982 Apart from that, Moldova (MD) returns to a single entry in zone.tab 3983 (and the incorrect syntax that was in the 2011m version of that file 3984 is so fixed - it would have been fixed in a different way had this 3985 change not happened - that's the "missing" sccs version id). 3986 3987 3988 Release data2011m - 2011-10-24 21:42:16 +0700 3989 3990 In particular, the typos in comments in the data (2011-11-17 should have 3991 been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that 3992 Tim Parenti noted) have been fixed, and the change for Ukraine has been 3993 made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to 3994 Tim Parenti, and also Denys Gavrysh) 3995 3996 In addition, I added Europe/Tiraspol to zone.tab. 3997 3998 This time, all the files have new version numbers... (including the files 3999 otherwise unchanged in 2011m that were changed in 2011l but didn't get new 4000 version numbers there...) 4001 4002 4003 Release data2011l - 2011-10-10 11:15:43 +0700 4004 4005 There are just 2 changes that cause different generated tzdata files from 4006 zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil 4007 is included, but commented out. Compared with the diff I sent out last week, 4008 this version also includes attributions for the sources for the changes 4009 (in much the same format as ado used, but the html tags have not been 4010 checked, verified, or used in any way at all, so if there are errors there, 4011 please let me know.) 4012 4013 4014 Release data2011k - 2011-09-20 17:54:03 -0400 4015 4016 [not summarized] 4017 4018 4019 Release data2011j - 2011-09-12 09:22:49 -0400 4020 4021 (contemporary changes for Samoa; past changes for Kenya, Uganda, and 4022 Tanzania); there are also two spelling corrections to comments in 4023 the australasia file (with thanks to Christos Zoulas). 4024 4025 4026 Release 2011i - 2011-08-29 05:56:32 -0400 4027 4028 [not summarized] 4029 4030 4031 Release data2011h - 2011-06-15 18:41:48 -0400 4032 4033 Russia and Curaao changes 4034 4035 4036 Release 2011g - 2011-04-25 09:07:22 -0400 4037 4038 update the rules for Egypt to reflect its abandonment of DST this year 4039 4040 4041 Release 2011f - 2011-04-06 17:14:53 -0400 4042 4043 [not summarized] 4044 4045 4046 Release 2011e - 2011-03-31 16:04:38 -0400 4047 4048 Morocco, Chile, and tz-link changes 4049 4050 4051 Release 2011d - 2011-03-14 09:18:01 -0400 4052 4053 changes that impact present-day timestamps in Cuba, Samoa, and Turkey 4054 4055 4056 Release 2011c - 2011-03-07 09:30:09 -0500 4057 4058 These do affect current timestamps in Chile and Annette Island, Canada. 4059 4060 4061 Release 2011b - 2011-02-07 08:44:50 -0500 4062 4063 [not summarized] 4064 4065 4066 Release 2011a - 2011-01-24 10:30:16 -0500 4067 4068 [not summarized] 4069 4070 4071 Release data2010o - 2010-11-01 09:18:23 -0400 4072 4073 change to the end of DST in Fiji in 2011 4074 4075 4076 Release 2010n - 2010-10-25 08:19:17 -0400 4077 4078 [not summarized] 4079 4080 4081 Release 2010m - 2010-09-27 09:24:48 -0400 4082 4083 Hong Kong, Vostok, and zic.c changes 4084 4085 4086 Release 2010l - 2010-08-16 06:57:25 -0400 4087 4088 [not summarized] 4089 4090 4091 Release 2010k - 2010-07-26 10:42:27 -0400 4092 4093 [not summarized] 4094 4095 4096 Release 2010j - 2010-05-10 09:07:48 -0400 4097 4098 changes for Baha de Banderas and for version naming 4099 4100 4101 Release data2010i - 2010-04-16 18:50:45 -0400 4102 4103 the end of DST in Morocco on 2010-08-08 4104 4105 4106 Release data2010h - 2010-04-05 09:58:56 -0400 4107 4108 [not summarized] 4109 4110 4111 Release data2010g - 2010-03-24 11:14:53 -0400 4112 4113 [not summarized] 4114 4115 4116 Release 2010f - 2010-03-22 09:45:46 -0400 4117 4118 [not summarized] 4119 4120 4121 Release data2010e - 2010-03-08 14:24:27 -0500 4122 4123 corrects the Dhaka bug found by Danvin Ruangchan 4124 4125 4126 Release data2010d - 2010-03-06 07:26:01 -0500 4127 4128 [not summarized] 4129 4130 4131 Release 2010c - 2010-03-01 09:20:58 -0500 4132 4133 changes including KRE's suggestion for earlier initialization of 4134 "goahead" and "goback" structure elements 4135 4136 4137 Release code2010a - 2010-02-16 10:40:04 -0500 4138 4139 [not summarized] 4140 4141 4142 Release data2010b - 2010-01-20 12:37:01 -0500 4143 4144 Mexico changes 4145 4146 4147 Release data2010a - 2010-01-18 08:30:04 -0500 4148 4149 changes to Dhaka 4150 4151 4152 Release data2009u - 2009-12-26 08:32:28 -0500 4153 4154 changes to DST in Bangladesh 4155 4156 4157 Release 2009t - 2009-12-21 13:24:27 -0500 4158 4159 [not summarized] 4160 4161 4162 Release data2009s - 2009-11-14 10:26:32 -0500 4163 4164 (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change 4165 4166 4167 Release 2009r - 2009-11-09 10:10:31 -0500 4168 4169 "antarctica" and "tz-link.htm" changes 4170 4171 4172 Release 2009q - 2009-11-02 09:12:40 -0500 4173 4174 with two corrections as reported by Eric Muller and Philip Newton 4175 4176 4177 Release data2009p - 2009-10-23 15:05:27 -0400 4178 4179 Argentina (including San Luis) changes (with the correction from 4180 Mariano Absatz) 4181 4182 4183 Release data2009o - 2009-10-14 16:49:38 -0400 4184 4185 Samoa (commentary only), Pakistan, and Bangladesh changes 4186 4187 4188 Release data2009n - 2009-09-22 15:13:38 -0400 4189 4190 added commentary for Argentina and a change to the end of DST in 4191 2009 in Pakistan 4192 4193 4194 Release data2009m - 2009-09-03 10:23:43 -0400 4195 4196 Samoa and Palestine changes 4197 4198 4199 Release data2009l - 2009-08-14 09:13:07 -0400 4200 4201 Samoa (comments only) and Egypt 4202 4203 4204 Release 2009k - 2009-07-20 09:46:08 -0400 4205 4206 [not summarized] 4207 4208 4209 Release data2009j - 2009-06-15 06:43:59 -0400 4210 4211 Bangladesh change (with a short turnaround since the DST change is 4212 impending) 4213 4214 4215 Release 2009i - 2009-06-08 09:21:22 -0400 4216 4217 updating for DST in Bangladesh this year 4218 4219 4220 Release 2009h - 2009-05-26 09:19:14 -0400 4221 4222 [not summarized] 4223 4224 4225 Release data2009g - 2009-04-20 16:34:07 -0400 4226 4227 Cairo 4228 4229 4230 Release data2009f - 2009-04-10 11:00:52 -0400 4231 4232 correct DST in Pakistan 4233 4234 4235 Release 2009e - 2009-04-06 09:08:11 -0400 4236 4237 [not summarized] 4238 4239 4240 Release 2009d - 2009-03-23 09:38:12 -0400 4241 4242 Morocco, Tunisia, Argentina, and American Astronomical Society changes 4243 4244 4245 Release data2009c - 2009-03-16 09:47:51 -0400 4246 4247 change to the start of Cuban DST 4248 4249 4250 Release 2009b - 2009-02-09 11:15:22 -0500 4251 4252 [not summarized] 4253 4254 4255 Release 2009a - 2009-01-21 10:09:39 -0500 4256 4257 [not summarized] 4258 4259 4260 Release data2008i - 2008-10-21 12:10:25 -0400 4261 4262 southamerica and zone.tab files, with Argentina DST rule changes and 4263 United States zone reordering and recommenting 4264 4265 4266 Release 2008h - 2008-10-13 07:33:56 -0400 4267 4268 [not summarized] 4269 4270 4271 Release 2008g - 2008-10-06 09:03:18 -0400 4272 4273 Fix a broken HTML anchor and update Brazil's DST transitions; 4274 there's also a slight reordering of information in tz-art.htm. 4275 4276 4277 Release data2008f - 2008-09-09 22:33:26 -0400 4278 4279 [not summarized] 4280 4281 4282 Release 2008e - 2008-07-28 14:11:17 -0400 4283 4284 changes by Arthur David Olson and Jesper Nrgaard Welen 4285 4286 4287 Release data2008d - 2008-07-07 09:51:38 -0400 4288 4289 changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo 4290 4291 4292 Release data2008c - 2008-05-19 17:48:03 -0400 4293 4294 Pakistan, Morocco, and Mongolia 4295 4296 4297 Release data2008b - 2008-03-24 08:30:59 -0400 4298 4299 including renaming Asia/Calcutta to Asia/Kolkata, with a backward 4300 link provided 4301 4302 4303 Release 2008a - 2008-03-08 05:42:16 -0500 4304 4305 [not summarized] 4306 4307 4308 Release 2007k - 2007-12-31 10:25:22 -0500 4309 4310 most importantly, changes to the "southamerica" file based on 4311 Argentina's readoption of daylight saving time 4312 4313 4314 Release 2007j - 2007-12-03 09:51:01 -0500 4315 4316 1. eliminate the "P" (parameter) macro; 4317 4318 2. the "noncontroversial" changes circulated on the time zone 4319 mailing list (less the changes to "logwtmp.c"); 4320 4321 3. eliminate "too many transition" errors when "min" is used in time 4322 zone rules; 4323 4324 4. changes by Paul Eggert (including updated information for Venezuela). 4325 4326 4327 Release data2007i - 2007-10-30 10:28:11 -0400 4328 4329 changes for Cuba and Syria 4330 4331 4332 Release 2007h - 2007-10-01 10:05:51 -0400 4333 4334 changes by Paul Eggert, as well as an updated link to the ICU 4335 project in tz-link.htm 4336 4337 4338 Release 2007g - 2007-08-20 10:47:59 -0400 4339 4340 changes by Paul Eggert 4341 4342 The "leapseconds" file has been updated to incorporate the most 4343 recent International Earth Rotation and Reference Systems Service 4344 (IERS) bulletin. 4345 4346 There's an addition to tz-art.htm regarding the television show "Medium". 4347 4348 4349 Release 2007f - 2007-05-07 10:46:46 -0400 4350 4351 changes by Paul Eggert (including Haiti, Turks and Caicos, and New 4352 Zealand) 4353 4354 changes to zic.c to allow hour values greater than 24 (along with 4355 Paul's improved time value overflow checking) 4356 4357 4358 Release 2007e - 2007-04-02 10:11:52 -0400 4359 4360 Syria and Honduras changes by Paul Eggert 4361 4362 zic.c variable renaming changes by Arthur David Olson 4363 4364 4365 Release 2007d - 2007-03-20 08:48:30 -0400 4366 4367 changes by Paul Eggert 4368 4369 the elimination of white space at the ends of lines 4370 4371 4372 Release 2007c - 2007-02-26 09:09:37 -0500 4373 4374 changes by Paul Eggert 4375 4376 4377 Release 2007b - 2007-02-12 09:34:20 -0500 4378 4379 Paul Eggert's proposed change to the quotation handling logic in zic.c. 4380 4381 changes to the commentary in "leapseconds" reflecting the IERS 4382 announcement that there is to be no positive leap second at the end 4383 of June 2007. 4384 4385 4386 Release 2007a - 2007-01-08 12:28:29 -0500 4387 4388 changes by Paul Eggert 4389 4390 Derick Rethan's Asmara change 4391 4392 Oscar van Vlijmen's Easter Island local mean time change 4393 4394 symbolic link changes 4395 4396 4397 Release 2006p - 2006-11-27 08:54:27 -0500 4398 4399 changes by Paul Eggert 4400 4401 4402 Release 2006o - 2006-11-06 09:18:07 -0500 4403 4404 changes by Paul Eggert 4405 4406 4407 Release 2006n - 2006-10-10 11:32:06 -0400 4408 4409 changes by Paul Eggert 4410 4411 4412 Release 2006m - 2006-10-02 15:32:35 -0400 4413 4414 changes for Uruguay, Palestine, and Egypt by Paul Eggert 4415 4416 (minimalist) changes to zic.8 to clarify "until" information 4417 4418 4419 Release data2006l - 2006-09-18 12:58:11 -0400 4420 4421 Paul's best-effort work on this coming weekend's Egypt time change 4422 4423 4424 Release 2006k - 2006-08-28 12:19:09 -0400 4425 4426 changes by Paul Eggert 4427 4428 4429 Release 2006j - 2006-08-21 09:56:32 -0400 4430 4431 changes by Paul Eggert 4432 4433 4434 Release code2006i - 2006-08-07 12:30:55 -0400 4435 4436 localtime.c fixes 4437 4438 Ken Pizzini's conversion script 4439 4440 4441 Release code2006h - 2006-07-24 09:19:37 -0400 4442 4443 adds public domain notices to four files 4444 4445 includes a fix for transition times being off by a second 4446 4447 adds a new recording to the "arts" file (information courtesy Colin Bowern) 4448 4449 4450 Release 2006g - 2006-05-08 17:18:09 -0400 4451 4452 northamerica changes by Paul Eggert 4453 4454 4455 Release 2006f - 2006-05-01 11:46:00 -0400 4456 4457 a missing version number problem is fixed (with thanks to Bradley 4458 White for catching the problem) 4459 4460 4461 Release 2006d - 2006-04-17 14:33:43 -0400 4462 4463 changes by Paul Eggert 4464 4465 added new items to tz-arts.htm that were found by Paul 4466 4467 4468 Release 2006c - 2006-04-03 10:09:32 -0400 4469 4470 two sets of data changes by Paul Eggert 4471 4472 a fencepost error fix in zic.c 4473 4474 changes to zic.c and the "europe" file to minimize differences 4475 between output produced by the old 32-bit zic and the new 64-bit 4476 version 4477 4478 4479 Release 2006b - 2006-02-20 10:08:18 -0500 4480 [tz32code2006b + tz64code2006b + tzdata2006b] 4481 4482 64-bit code 4483 4484 All SCCS IDs were bumped to "8.1" for this release. 4485 4486 4487 Release 2006a - 2006-01-30 08:59:31 -0500 4488 4489 changes by Paul Eggert (in particular, Indiana time zone moves) 4490 4491 an addition to the zic manual page to describe how special-case 4492 transitions are handled 4493 4494 4495 Release 2005r - 2005-12-27 09:27:13 -0500 4496 4497 Canadian changes by Paul Eggert 4498 4499 They also add "<pre>" directives to time zone data files and reflect 4500 changes to warning message logic in "zdump.c" (but with calls to 4501 "gettext" kept unbundled at the suggestion of Ken Pizzini). 4502 4503 4504 Release 2005q - 2005-12-13 09:17:09 -0500 4505 4506 Nothing earth-shaking here: 4507 1. Electronic mail addresses have been removed. 4508 2. Casts of the return value of exit have been removed. 4509 3. Casts of the argument of is.* macros have been added. 4510 4. Indentation in one section of zic.c has been fixed. 4511 5. References to dead URLs in the data files have been dealt with. 4512 4513 4514 Release 2005p - 2005-12-05 10:30:53 -0500 4515 4516 "systemv", "tz-link.htm", and "zdump.c" changes 4517 (less the casts of arguments to the is* macros) 4518 4519 4520 Release 2005o - 2005-11-28 10:55:26 -0500 4521 4522 Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert 4523 4524 zdump.c lint fixes by Arthur David Olson 4525 4526 4527 Release 2005n - 2005-10-03 09:44:09 -0400 4528 4529 changes by Paul Eggert (both the Uruguay changes and the Kyrgyzstan 4530 et al. changes) 4531 4532 4533 Release 2005m - 2005-08-29 12:15:40 -0400 4534 4535 changes by Paul Eggert (with a small tweak to the tz-art change) 4536 4537 a declaration of an unused variable has been removed from zdump.c 4538 4539 4540 Release 2005l - 2005-08-22 12:06:39 -0400 4541 4542 changes by Paul Eggert 4543 4544 overflow/underflow checks by Arthur David Olson, minus changes to 4545 the "Theory" file about the pending addition of 64-bit data (I grow 4546 less confident of the changes being accepted with each passing day, 4547 and the changes no longer increase the data files nine-fold--there's 4548 less than a doubling in size by my local Sun's reckoning) 4549 4550 4551 Release 2005k - 2005-07-14 14:14:24 -0400 4552 4553 The "leapseconds" file has been edited to reflect the recently 4554 announced leap second at the end of 2005. 4555 4556 I've also deleted electronic mail addresses from the files as an 4557 anti-spam measure. 4558 4559 4560 Release 2005j - 2005-06-13 14:34:13 -0400 4561 4562 These reflect changes to limit the length of time zone abbreviations 4563 and the characters used in those abbreviations. 4564 4565 There are also changes to handle POSIX-style "quoted" timezone 4566 environment variables. 4567 4568 The changes were circulated on the time zone mailing list; the only 4569 change since then was the removal of a couple of minimum-length of 4570 abbreviation checks. 4571 4572 4573 Release data2005i - 2005-04-21 15:04:16 -0400 4574 4575 changes (most importantly to Nicaragua and Haiti) by Paul Eggert 4576 4577 4578 Release 2005h - 2005-04-04 11:24:47 -0400 4579 4580 changes by Paul Eggert 4581 4582 minor changes to Makefile and zdump.c to produce more useful output 4583 when doing a "make typecheck" 4584 4585 4586 Release 2005g - 2005-03-14 10:11:21 -0500 4587 4588 changes by Paul Eggert (a change to current DST rules in Uruguay and 4589 an update to a link to time zone software) 4590 4591 4592 Release 2005f - 2005-03-01 08:45:32 -0500 4593 4594 data and documentation changes by Paul Eggert 4595 4596 4597 Release 2005e - 2005-02-10 15:59:44 -0500 4598 4599 [not summarized] 4600 4601 4602 Release code2005d - 2005-01-31 09:21:47 -0500 4603 4604 make zic complain about links to links if the -v flag is used 4605 4606 have "make public" do more code checking 4607 4608 add an include to "localtime.c" for the benefit of gcc systems 4609 4610 4611 Release 2005c - 2005-01-17 18:36:29 -0500 4612 4613 get better results when mktime runs on a system where time_t is double 4614 4615 changes to the data files (most importantly to Paraguay) 4616 4617 4618 Release 2005b - 2005-01-10 09:19:54 -0500 4619 4620 Get localtime and gmtime working on systems with exotic time_t types. 4621 4622 Update the leap second commentary in the "leapseconds" file. 4623 4624 4625 Release 2005a - 2005-01-01 13:13:44 -0500 4626 4627 [not summarized] 4628 4629 4630 Release code2004i - 2004-12-14 13:42:58 -0500 4631 4632 Deal with systems where time_t is unsigned. 4633 4634 4635 Release code2004h - 2004-12-07 11:40:18 -0500 4636 4637 64-bit-time_t changes 4638 4639 4640 Release 2004g - 2004-11-02 09:06:01 -0500 4641 4642 update to Cuba (taking effect this weekend) 4643 4644 other changes by Paul Eggert 4645 4646 correction of the spelling of Oslo 4647 4648 changed versions of difftime.c and private.h 4649 4650 4651 Release code2004f - 2004-10-21 10:25:22 -0400 4652 4653 Cope with wide-ranging tm_year values. 4654 4655 4656 Release 2004e - 2004-10-11 14:47:21 -0400 4657 4658 Brazil/Argentina/Israel changes by Paul Eggert 4659 4660 changes to tz-link.htm by Paul 4661 4662 one small fix to Makefile 4663 4664 4665 Release 2004d - 2004-09-22 08:27:29 -0400 4666 4667 Avoid overflow problems when TM_YEAR_BASE is added to an integer. 4668 4669 4670 Release 2004c - 2004-08-11 12:06:26 -0400 4671 4672 asctime-related changes 4673 4674 (variants of) some of the documentation changes suggested by Paul Eggert 4675 4676 4677 Release 2004b - 2004-07-19 14:33:35 -0400 4678 4679 data changes by Paul Eggert - most importantly, updates for Argentina 4680 4681 4682 Release 2004a - 2004-05-27 12:00:47 -0400 4683 4684 changes by Paul Eggert 4685 4686 Handle DST transitions that occur at the end of a month in some 4687 years but at the start of the following month in other years. 4688 4689 Add a copy of the correspondence that's the basis for claims about 4690 DST in the Navajo Nation. 4691 4692 4693 Release 2003e - 2003-12-15 09:36:47 -0500 4694 4695 changes by Arthur David Olson (primarily code changes) 4696 4697 changes by Paul Eggert (primarily data changes) 4698 4699 minor changes to "Makefile" and "northamerica" (in the latter case, 4700 optimization of the "Toronto" rules) 4701 4702 4703 Release 2003d - 2003-10-06 09:34:44 -0400 4704 4705 changes by Paul Eggert 4706 4707 4708 Release 2003c - 2003-09-16 10:47:05 -0400 4709 4710 Fix bad returns in zic.c's inleap function. 4711 Thanks to Bradley White for catching the problem! 4712 4713 4714 Release 2003b - 2003-09-16 07:13:44 -0400 4715 4716 Add a "--version" option (and documentation) to the zic and zdump commands. 4717 4718 changes to overflow/underflow checking in zic 4719 4720 a localtime typo fix. 4721 4722 Update the leapseconds and tz-art.htm files. 4723 4724 4725 Release 2003a - 2003-03-24 09:30:54 -0500 4726 4727 changes by Paul Eggert 4728 4729 a few additions and modifications to the tz-art.htm file 4730 4731 4732 Release 2002d - 2002-10-15 13:12:42 -0400 4733 4734 changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab 4735 4736 There's also a new time zone quote in "tz-art.htm". 4737 4738 4739 Release 2002c - 2002-04-04 11:55:20 -0500 4740 4741 changes by Paul Eggert 4742 4743 Change zic.c to avoid creating symlinks to files that don't exist. 4744 4745 4746 Release 2002b - 2002-01-28 12:56:03 -0500 4747 4748 [These change notes are for Release 2002a, which was corrupted. 4749 2002b was a corrected version of 2002a.] 4750 4751 changes by Paul Eggert 4752 4753 Update the "leapseconds" file to note that there'll be no leap 4754 second at the end of June, 2002. 4755 4756 Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone. 4757 4758 Change to "difftime.c" to avoid sizeof problems. 4759 4760 4761 Release 2001d - 2001-10-09 13:31:32 -0400 4762 4763 changes by Paul Eggert 4764 4765 4766 Release 2001c - 2001-06-05 13:59:55 -0400 4767 4768 changes by Paul Eggert and Andrew Brown 4769 4770 4771 Release 2001b - 2001-04-05 16:44:38 -0400 4772 4773 changes by Paul Eggert (modulo jnorgard's typo fix) 4774 4775 tz-art.htm has been HTMLified. 4776 4777 4778 Release 2001a - 2001-03-13 12:57:44 -0500 4779 4780 changes by Paul Eggert 4781 4782 An addition to the "leapseconds" file: comments with the text of the 4783 latest IERS leap second notice. 4784 4785 Trailing white space has been removed from data file lines, and 4786 repeated spaces in "Rule Jordan" lines in the "asia" file have been 4787 converted to tabs. 4788 4789 4790 Release 2000h - 2000-12-14 15:33:38 -0500 4791 4792 changes by Paul Eggert 4793 4794 one typo fix in the "art" file 4795 4796 With providence, this is the last update of the millennium. 4797 4798 4799 Release 2000g - 2000-10-10 11:35:22 -0400 4800 4801 changes by Paul Eggert 4802 4803 correction of John Mackin's name submitted by Robert Elz 4804 4805 Garry Shandling's Daylight Saving Time joke (!?!) from the recent 4806 Emmy Awards broadcast. 4807 4808 4809 Release 2000f - 2000-08-10 09:31:58 -0400 4810 4811 changes by Paul Eggert 4812 4813 Added information in "tz-art.htm" on a Seinfeld reference to DST. 4814 4815 Error checking and messages in the "yearistype" script have been 4816 improved. 4817 4818 4819 Release 2000e - 2000-07-31 09:27:54 -0400 4820 4821 data changes by Paul Eggert 4822 4823 a change to the default value of the defined constant HAVE_STRERROR 4824 4825 the addition of a Dave Barry quote on DST to the tz-arts file 4826 4827 4828 Release 2000d - 2000-04-20 15:43:04 -0400 4829 4830 changes to the documentation and code of strftime for C99 conformance 4831 4832 a bug fix for date.c 4833 4834 These are based on (though modified from) changes by Paul Eggert. 4835 4836 4837 Release 2000c - 2000-03-04 10:31:43 -0500 4838 4839 changes by Paul Eggert 4840 4841 4842 Release 2000b - 2000-02-21 12:16:29 -0500 4843 4844 changes by Paul Eggert and Joseph Myers 4845 4846 modest tweaks to the tz-art.htm and tz-link.htm files 4847 4848 4849 Release 2000a - 2000-01-18 09:21:26 -0500 4850 4851 changes by Paul Eggert 4852 4853 The two hypertext documents have also been renamed. 4854 4855 4856 Release code1999i-data1999j - 1999-11-15 18:43:22 -0500 4857 4858 Paul Eggert's changes 4859 4860 additions to the "zic" manual page and the "Arts.htm" file 4861 4862 4863 Release code1999h-data1999i - 1999-11-08 14:55:21 -0500 4864 4865 [not summarized] 4866 4867 4868 Release data1999h - 1999-10-07 03:50:29 -0400 4869 4870 changes by Paul Eggert to "europe" (most importantly, fixing 4871 Lithuania and Estonia) 4872 4873 4874 Release 1999g - 1999-09-28 11:06:18 -0400 4875 4876 data changes by Paul Eggert (most importantly, the change for 4877 Lebanon that buys correctness for this coming Sunday) 4878 4879 The "code" file contains changes to "Makefile" and "checktab.awk" to 4880 allow better checking of time zone files before they are published. 4881 4882 4883 Release 1999f - 1999-09-23 09:48:14 -0400 4884 4885 changes by Arthur David Olson and Paul Eggert 4886 4887 4888 Release 1999e - 1999-08-17 15:20:54 -0400 4889 4890 changes circulated by Paul Eggert, although the change to handling 4891 of DST-specifying timezone names has been commented out for now 4892 (search for "XXX" in "localtime.c" for details). These files also 4893 do not make any changes to the start of DST in Brazil. 4894 4895 In addition to Paul's changes, there are updates to "Arts.htm" and 4896 cleanups of URLs. 4897 4898 4899 Release 1999d - 1999-03-30 11:31:07 -0500 4900 4901 changes by Paul Eggert 4902 4903 The Makefile's "make public" rule has also been changed to do a test 4904 compile of each individual time zone data file (which should help 4905 avoid problems such as the one we had with Nicosia). 4906 4907 4908 Release 1999c - 1999-03-25 09:47:47 -0500 4909 4910 changes by Paul Eggert, most importantly the change for Chile. 4911 4912 4913 Release 1999b - 1999-02-01 17:51:44 -0500 4914 4915 changes by Paul Eggert 4916 4917 code changes (suggested by Mani Varadarajan, mani at be.com) for 4918 correct handling of symbolic links when building using a relative directory 4919 4920 code changes to generate correct messages for failed links 4921 4922 updates to the URLs in Arts.htm 4923 4924 4925 Release 1999a - 1999-01-19 16:20:29 -0500 4926 4927 error message internationalizations and corrections in zic.c and 4928 zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz, 4929 to whom thanks!) 4930 4931 4932 Release code1998h-data1998i - 1998-10-01 09:56:10 -0400 4933 4934 changes for Brazil, Chile, and Germany 4935 4936 support for use of "24:00" in the input files for the time zone compiler 4937 4938 4939 Release code1998g-data1998h - 1998-09-24 10:50:28 -0400 4940 4941 changes by Paul Eggert 4942 4943 correction to a define in the "private.h" file 4944 4945 4946 Release data1998g - 1998-08-11 03:28:35 -0000 4947 [tzdata1998g.tar.gz is missing!] 4948 4949 Lithuanian change provided by mgedmin at pub.osf.it 4950 4951 Move creation of the GMT link with Etc/GMT to "etcetera" (from 4952 "backward") to ensure that the GMT file is created even where folks 4953 don't want the "backward" links (as suggested by Paul Eggert). 4954 4955 4956 Release data1998f - 1998-07-20 13:50:00 -0000 4957 [tzdata1998f.tar.gz is missing!] 4958 4959 Update the "leapseconds" file to include the newly-announced 4960 insertion at the end of 1998. 4961 4962 4963 Release code1998f - 1998-06-01 10:18:31 -0400 4964 4965 addition to localtime.c by Guy Harris 4966 4967 4968 Release 1998e - 1998-05-28 09:56:26 -0400 4969 4970 The Makefile is changed to produce zoneinfo-posix rather than 4971 zoneinfo/posix, and to produce zoneinfo-leaps rather than 4972 zoneinfo/right. 4973 4974 data changes by Paul Eggert 4975 4976 changes from Guy Harris to provide asctime_r and ctime_r 4977 4978 A usno1998 file (substantially identical to usno1997) has been added. 4979 4980 4981 Release 1998d - 1998-05-14 11:58:34 -0400 4982 4983 changes to comments (in particular, elimination of references to CIA maps). 4984 "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places 4985 where changes occur. 4986 4987 4988 Release 1998c - 1998-02-28 12:32:26 -0500 4989 4990 changes by Paul Eggert (save the "French correction," on which I'll 4991 wait for the dust to settle) 4992 4993 symlink changes 4994 4995 changes and additions to Arts.htm 4996 4997 4998 Release 1998b - 1998-01-17 14:31:51 -0500 4999 5000 URL cleanups and additions 5001 5002 5003 Release 1998a - 1998-01-13 12:37:35 -0500 5004 5005 changes by Paul Eggert 5006 5007 5008 Release code1997i-data1997k - 1997-12-29 09:53:41 -0500 5009 5010 changes by Paul Eggert, with minor modifications from Arthur David 5011 Olson to make the files more browser friendly 5012 5013 5014 Release code1997h-data1997j - 1997-12-18 17:47:35 -0500 5015 5016 minor changes to put "TZif" at the start of each timezone information file 5017 5018 a rule has also been added to the Makefile so you can 5019 make zones 5020 to just recompile the zone information files (rather than doing a 5021 full "make install" with its other effects). 5022 5023 5024 Release data1997i - 1997-10-07 08:45:38 -0400 5025 5026 changes to Africa by Paul Eggert 5027 5028 5029 Release code1997g-data1997h - 1997-09-04 16:56:54 -0400 5030 5031 corrections for Uruguay (and other locations) 5032 5033 Arthur David Olson's simple-minded fix allowing mktime to both 5034 correctly handle leap seconds and correctly handle tm_sec values 5035 upon which arithmetic has been performed. 5036 5037 5038 Release code1997f-data1997g - 1997-07-19 13:15:02 -0400 5039 5040 Paul Eggert's updates 5041 5042 a small change to a function prototype; 5043 5044 "Music" has been renamed "Arts.htm", HTMLified, and augmented to 5045 include information on Around the World in Eighty Days. 5046 5047 5048 Release code1997e-data1997f - 1997-05-03 18:52:34 -0400 5049 5050 fixes to zic's error handling 5051 5052 changes inspired by the item circulated on Slovenia 5053 5054 The description of Web resources has been HTMLified for browsing 5055 convenience. 5056 5057 A new piece of tz-related music has been added to the "Music" file. 5058 5059 5060 Release code1997d-data1997e - 1997-03-29 12:48:52 -0500 5061 5062 Paul Eggert's latest suggestions 5063 5064 5065 Release code1997c-data1997d - 1997-03-07 20:37:54 -0500 5066 5067 changes to "zic.c" to correct performance of the "-s" option 5068 5069 a new file "usno1997" 5070 5071 5072 Release data1997c - 1997-03-04 09:58:18 -0500 5073 5074 changes in Israel 5075 5076 5077 Release 1997b - 1997-02-27 18:34:19 -0500 5078 5079 The data file incorporates the 1997 leap second. 5080 5081 The code file incorporates Arthur David Olson's take on the 5082 zic/multiprocessor/directory-creation situation. 5083 5084 5085 Release 1997a - 1997-01-21 09:11:10 -0500 5086 5087 Paul Eggert's Antarctica (and other changes) 5088 5089 Arthur David Olson finessed the "getopt" issue by checking against 5090 both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1 5091 is returned while SunOS 5.5's manual says EOF is returned). 5092 5093 5094 Release code1996o-data1996n - 1996-12-27 21:42:05 -0500 5095 5096 Paul Eggert's latest changes 5097 5098 5099 Release code1996n - 1996-12-16 09:42:02 -0500 5100 5101 link snapping fix from Bruce Evans (via Garrett Wollman) 5102 5103 5104 Release data1996m - 1996-11-24 02:37:34 -0000 5105 [tzdata1996m.tar.gz is missing!] 5106 5107 Paul Eggert's batch of changes 5108 5109 5110 Release code1996m-data1996l - 1996-11-05 14:00:12 -0500 5111 5112 No functional changes here; the files have simply been changed to 5113 make more use of ISO style dates in comments. The names of the above 5114 files now include the year in full. 5115 5116 5117 Release code96l - 1996-09-08 17:12:20 -0400 5118 5119 tzcode96k was missing a couple of pieces. 5120 5121 5122 Release 96k - 1996-09-08 16:06:22 -0400 5123 5124 the latest round of changes from Paul Eggert 5125 5126 the recent Year 2000 material 5127 5128 5129 Release code96j - 1996-07-30 13:18:53 -0400 5130 5131 Set sp->typecnt as suggested by Timothy Patrick Murphy. 5132 5133 5134 Release code96i - 1996-07-27 20:11:35 -0400 5135 5136 Paul's suggested patch for strftime %V week numbers 5137 5138 5139 Release data96i - 1996-07-01 18:13:04 -0400 5140 5141 "northamerica" and "europe" changes by Paul Eggert 5142 5143 5144 Release code96h - 1996-06-05 08:02:21 -0400 5145 5146 fix for handling transitions specified in Universal Time 5147 5148 Some "public domain" notices have also been added. 5149 5150 5151 Release code96g - 1996-05-16 14:00:26 -0400 5152 5153 fix for the simultaneous-DST-and-zone-change challenge 5154 5155 5156 Release data96h - 1996-05-09 17:40:51 -0400 5157 5158 changes by Paul Eggert 5159 5160 5161 Release code96f-data96g - 1996-05-03 03:09:59 -0000 5162 [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!] 5163 5164 The changes get us some of the way to fixing the problems noted in Paul 5165 Eggert's letter yesterday (in addition to a few others). The approach 5166 has been to make zic a bit smarter about figuring out what time zone 5167 abbreviations apply just after the time specified in the "UNTIL" part 5168 of a zone line. Putting the smarts in zic means avoiding having 5169 transition times show up in both "Zone" lines and "Rule" lines, which 5170 in turn avoids multiple transition time entries in time zone files. 5171 (This also makes the zic input files such as "europe" a bit shorter and 5172 should ease maintenance.) 5173 5174 5175 Release data96f - 1996-04-19 19:20:03 -0000 5176 [tzdata96f.tar.gz is missing!] 5177 5178 The only changes are to the "northamerica" file; the time zone 5179 abbreviation for Denver is corrected to MST (and MDT), and the 5180 comments for Mexico have been updated. 5181 5182 5183 Release data96e - 1996-03-19 17:37:26 -0500 5184 5185 Proposals by Paul Eggert, in particular the Portugal change that 5186 comes into play at the end of this month. 5187 5188 5189 Release data96d - 1996-03-18 20:49:39 -0500 5190 5191 [not summarized] 5192 5193 5194 Release code96e - 1996-02-29 15:43:27 -0000 5195 [tzcode96e.tar.gz is missing!] 5196 5197 internationalization changes and the fix to the documentation for strftime 5198 5199 5200 Release code96d-data96c - 1996-02-12 11:05:27 -0500 5201 5202 The "code" file simply updates Bob Kridle's electronic address. 5203 5204 The "data" file updates rules for Mexico. 5205 5206 5207 Release data96b - 1996-01-27 15:44:42 -0500 5208 5209 Kiribati change 5210 5211 5212 Release code96c - 1996-01-16 16:58:15 -0500 5213 5214 leap-year streamlining and binary-search changes 5215 5216 fix to newctime.3 5217 5218 5219 Release code96b - 1996-01-10 20:42:39 -0500 5220 5221 fixes and enhancements from Paul Eggert, including code that 5222 emulates the behavior of recent versions of the SunOS "date" 5223 command. 5224 5225 5226 Release 96a - 1996-01-06 09:08:24 -0500 5227 5228 Israel updates 5229 5230 fixes to strftime.c for correct ISO 8601 week number generation, 5231 plus support for two new formats ('G' and 'g') to give ISO 8601 year 5232 numbers (which are not necessarily the same as calendar year numbers) 5233 5234 5235 Release code95i-data95m - 1995-12-21 12:46:47 -0500 5236 5237 The latest revisions from Paul Eggert are included, the usno1995 5238 file has been updated, and a new file ("WWW") covering useful URLs 5239 has been added. 5240 5241 5242 Release code95h-data95l - 1995-12-19 18:10:12 -0500 5243 5244 A simplification of a macro definition, a change to data for Sudan, 5245 and (for last minute shoppers) notes in the "Music" file on the CD 5246 "Old Man Time". 5247 5248 5249 Release code95g-data95k - 1995-10-30 10:32:47 -0500 5250 5251 (slightly reformatted) 8-bit-clean proposed patch 5252 5253 minor patch: US/Eastern -> America/New_York 5254 5255 snapshot of the USNO's latest data ("usno1995") 5256 5257 some other minor cleanups 5258 5259 5260 Release code95f-data95j - 1995-10-28 21:01:34 -0000 5261 [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!] 5262 5263 European cleanups 5264 5265 support for 64-bit time_t's 5266 5267 optimization in localtime.c 5268 5269 5270 Release code95e - 1995-10-13 13:23:57 -0400 5271 5272 the mktime change to scan from future to past when trying to find time zone 5273 offsets 5274 5275 5276 Release data95i - 1995-09-26 10:43:26 -0400 5277 5278 For Canada/Central, guess that the Sun customer's "one week too 5279 early" was just a approximation, and the true error is one month 5280 too early. This is consistent with the rest of Canada. 5281 5282 5283 Release data95h - 1995-09-21 11:26:48 -0400 5284 5285 latest changes from Paul Eggert 5286 5287 5288 Release code95d - 1995-09-14 11:14:45 -0400 5289 5290 the addition of a "Music" file, which documents four recorded 5291 versions of the tune "Save That Time". 5292 5293 5294 Release data95g - 1995-09-01 17:21:36 -0400 5295 5296 "yearistype" correction 5297 5298 5299 Release data95f - 1995-08-28 20:46:56 -0400 5300 5301 Paul Eggert's change to the australasia file 5302 5303 5304 Release data95e - 1995-07-08 18:02:34 -0400 5305 5306 The only change is a leap second at the end of this year. 5307 Thanks to Bradley White for forwarding news on the leap second. 5308 5309 5310 Release data95d - 1995-07-03 13:26:22 -0400 5311 5312 Paul Eggert's changes 5313 5314 5315 Release data95c - 1995-07-02 19:19:28 -0400 5316 5317 changes to "asia", "backward", "europe", and "southamerica" 5318 (read: northamericacentrics need not apply) 5319 5320 5321 Release code95c - 1995-03-13 14:00:46 -0500 5322 5323 one-line fix for sign extension problems in detzcode 5324 5325 5326 Release 95b - 1995-03-04 11:22:38 -0500 5327 5328 Minor changes in both: 5329 5330 The "code" file contains a workaround for the lack of "unistd.h" in 5331 Microsoft C++ version 7. 5332 5333 The "data" file contains a fixed "Link" for America/Shiprock. 5334 5335 5336 Release 94h - 1994-12-10 12:51:14 -0500 5337 5338 The files: 5339 5340 * incorporate the changes to "zdump" and "date" to make changes to 5341 the "TZ" environment variable permanent; 5342 5343 * incorporate the table changes by Paul Eggert; 5344 5345 * include (and document) support for universal time specifications in 5346 data files - but do not (yet) include use of this feature in the 5347 data files. 5348 5349 Think of this as "TZ Classic" - the software has been set up not to break if 5350 universal time shows up in its input, and data entries have been 5351 left as is so as not to break existing implementations. 5352 5353 5354 Release data94f - 1994-08-20 12:56:09 -0400 5355 5356 (with thanks!) the latest data updates from Paul Eggert 5357 5358 5359 Release data94e - 1994-06-04 13:13:53 -0400 5360 5361 [not summarized] 5362 5363 5364 Release code94g - 1994-05-05 12:14:07 -0400 5365 5366 fix missing "optind.c" and a reference to it in the Makefile 5367 5368 5369 Release code94f - 1994-05-05 13:00:33 -0000 5370 [tzcode94f.tar.gz is missing!] 5371 5372 changes to avoid overflow in difftime, as well as changes to cope 5373 with the 52/53 challenge in strftime 5374 5375 5376 Release code94e - 1994-03-30 23:32:59 -0500 5377 5378 change for the benefit of PCTS 5379 5380 5381 Release 94d - 1994-02-24 15:42:25 -0500 5382 5383 Avoid clashes with POSIX semantics for zones such as GMT+4. 5384 5385 Some other very minor housekeeping is also present. 5386 5387 5388 Release code94c - 1994-02-10 08:52:40 -0500 5389 5390 Fix bug where mkdirs was broken unless you compile with 5391 -fwritable-strings (which is generally losing to do). 5392 5393 5394 Release 94b - 1994-02-07 10:04:33 -0500 5395 5396 work by Paul Eggert who notes: 5397 5398 I found another book of time zone histories by E W Whitman; it's not 5399 as extensive as Shanks but has a few goodies of its own. I used it 5400 to update the tables. I also fixed some more as a result of 5401 correspondence with Adam David and Peter Ilieve, and move some stray 5402 links from 'europe' to 'backward'. I corrected some scanning errors 5403 in usno1989. 5404 5405 As far as the code goes, I fixed zic to allow years in the range 5406 INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900. 5407 And I cleaned up the zic documentation a little bit. 5408 5409 5410 Release data94a - 1994-02-03 08:58:54 -0500 5411 5412 It simply incorporates the recently announced leap second into the 5413 "leapseconds" file. 5414 5415 5416 Release 93g - 1993-11-22 17:28:27 -0500 5417 5418 Paul Eggert has provided a good deal of historic information (based 5419 on Shanks), and there are some code changes to deal with the buglets 5420 that crawled out in dealing with the new information. 5421 5422 5423 Release 93f - 1993-10-15 12:27:46 -0400 5424 5425 Paul Eggert's changes 5426 5427 5428 Release 93e - 1993-09-05 21:21:44 -0400 5429 5430 This has updated data for Israel, England, and Kwajalein. There's 5431 also an update to "zdump" to cope with Kwajalein's 24-hour jump. 5432 Thanks to Paul Eggert and Peter Ilieve for the changes. 5433 5434 5435 Release 93d - 1993-06-17 23:34:17 -0400 5436 5437 new fix and new data on Israel 5438 5439 5440 Release 93c - 1993-06-06 19:31:55 -0400 5441 5442 [not summarized] 5443 5444 5445 Release 93b - 1993-02-02 14:53:58 -0500 5446 5447 updated "leapseconds" file 5448 5449 5450 Release 93 - 1993-01-08 07:01:06 -0500 5451 5452 At kre's suggestion, the package has been split in two - a code piece 5453 (which also includes documentation) that's only of use to folks who 5454 want to recompile things and a data piece useful to anyone who can 5455 run "zic". 5456 5457 The new version has a few changes to the data files, a few 5458 portability changes, and an off-by-one fix (with thanks to 5459 Tom Karzes at deshaw.com for providing a description and a 5460 solution). 5461 5462 5463 Release 92c - 1992-11-21 17:35:36 -0000 5464 [tz92c.tar.Z is missing!] 5465 5466 The fallout from the latest round of DST transitions. 5467 5468 There are changes for Portugal, Saskatchewan, and "Pacific-New"; 5469 there's also a change to "zic.c" that makes it portable to more systems. 5470 5471 5472 Release 92 - 1992-04-25 18:17:03 -0000 5473 [tz92.tar.Z is missing!] 5474 5475 By popular demand (well, at any rate, following a request by kre at munnari) 5476 5477 5478 The 1989 update of the time zone package featured: 5479 5480 * POSIXization (including interpretation of POSIX-style TZ environment 5481 variables, provided by Guy Harris), 5482 * ANSIfication (including versions of "mktime" and "difftime"), 5483 * SVIDulation (an "altzone" variable) 5484 * MACHination (the "gtime" function) 5485 * corrections to some time zone data (including corrections to the rules 5486 for Great Britain and New Zealand) 5487 * reference data from the United States Naval Observatory for folks who 5488 want to do additional time zones 5489 * and the 1989 data for Saudi Arabia. 5490 5491 (Since this code will be treated as "part of the implementation" in some 5492 places and as "part of the application" in others, there's no good way to 5493 name functions, such as timegm, that are not part of the proposed ANSI C 5494 standard; such functions have kept their old, underscore-free names in this 5495 update.) 5496 5497 And the "dysize" function has disappeared; it was present to allow 5498 compilation of the "date" command on old BSD systems, and a version of "date" 5499 is now provided in the package. The "date" command is not created when you 5500 "make all" since it may lack options provided by the version distributed with 5501 your operating system, or may not interact with the system in the same way 5502 the native version does. 5503 5504 Since POSIX frowns on correct leap second handling, the default behavior of 5505 the "zic" command (in the absence of a "-L" option) has been changed to omit 5506 leap second information from its output files. 5507 5508 5509 ----- 5510 Notes 5511 5512 This file contains copies of the part of each release announcement 5513 that talks about the changes in that release. The text has been 5514 adapted and reformatted for the purposes of this file. 5515 5516 Traditionally a release R consists of a pair of tarball files, 5517 tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g., 5518 code2010a, data2012c) consist of just one or the other tarball, and a 5519 few (e.g., code2012c-data2012d) have tarballs with mixed version 5520 numbers. Recent releases also come in an experimental format 5521 consisting of a single tarball tzdb-R.tar.lz with extra data. 5522 5523 Release timestamps are taken from the release's commit (for newer, 5524 Git-based releases), from the newest file in the tarball (for older 5525 releases, where this info is available) or from the email announcing 5526 the release (if all else fails; these are marked with a time zone 5527 abbreviation of -0000 and an "is missing!" comment). 5528 5529 Earlier versions of the code and data were not announced on the tz 5530 list and are not summarized here. 5531 5532 This file is in the public domain. 5533 5534 Local Variables: 5535 coding: utf-8 5536 End: 5537
Indexes created Mon Sep 29 03:10:08 GMT 2025