NEWS revision 1.33
1 News for the tz database 2 3 Release 2021a - 2021-01-24 10:54:57 -0800 4 5 Changes to future timestamps 6 7 South Sudan changes from +03 to +02 on 2021-02-01 at 00:00. 8 (Thanks to Steffen Thorsen.) 9 10 11 Release 2020f - 2020-12-29 00:17:46 -0800 12 13 Change to build procedure 14 15 'make rearguard_tarballs' no longer generates a bad rearguard.zi, 16 fixing a 2020e bug. (Problem reported by Deborah Goldsmith.) 17 18 19 Release 2020e - 2020-12-22 15:14:34 -0800 20 21 Briefly: 22 Volgograd switches to Moscow time on 2020-12-27 at 02:00. 23 24 Changes to future timestamps 25 26 Volgograd changes time zone from +04 to +03 on 2020-12-27 at 02:00. 27 (Thanks to Alexander Krivenyshev and Stepan Golosunov.) 28 29 Changes to past timestamps 30 31 Correct many pre-1986 transitions, fixing entries originally 32 derived from Shanks. The fixes include: 33 - Australia: several 1917 through 1971 transitions 34 - Bahamas: several 1941 through 1945 transitions 35 - Bermuda: several 1917 through 1956 transitions 36 - Belize: several 1942 through 1968 transitions 37 - Ghana: several 1915 through 1956 transitions 38 - Israel and Palestine: several 1940 through 1985 transitions 39 - Kenya and adjacent: several 1908 through 1960 transitions 40 - Nigeria and adjacent: correcting LMT in Lagos, and several 1905 41 through 1919 transitions 42 - Seychelles: the introduction of standard time in 1907, not 1906 43 - Vanuatu: DST in 1973-1974, and a corrected 1984 transition 44 (Thanks to P Chan.) 45 46 Because of the Australia change, Australia/Currie (King Island) is 47 no longer needed, as it is identical to Australia/Hobart for all 48 timestamps since 1970 and was therefore created by mistake. 49 Australia/Currie has been moved to the 'backward' file and its 50 corrected data moved to the 'backzone' file. 51 52 Changes to past time zone abbreviations and DST flags 53 54 To better match legislation in Turks and Caicos, the 2015 shift to 55 year-round observance of -04 is now modeled as AST throughout before 56 returning to Eastern Time with US DST in 2018, rather than as 57 maintaining EDT until 2015-11-01. (Thanks to P Chan.) 58 59 Changes to documentation 60 61 The zic man page now documents zic's coalescing of transitions 62 when a zone falls back just before DST springs forward. 63 64 65 Release 2020d - 2020-10-21 11:24:13 -0700 66 67 Briefly: 68 Palestine ends DST earlier than predicted, on 2020-10-24. 69 70 Changes to past and future timestamps 71 72 Palestine ends DST on 2020-10-24 at 01:00, instead of 2020-10-31 73 as previously predicted (thanks to Sharef Mustafa.) Its 74 2019-10-26 fall-back was at 00:00, not 01:00 (thanks to Steffen 75 Thorsen.) Its 2015-10-23 transition was at 01:00 not 00:00, and 76 its spring 2020 transition was on March 28 at 00:00, not March 27 77 (thanks to Pierre Cashon.) This affects Asia/Gaza and 78 Asia/Hebron. Assume future spring and fall transitions will be on 79 the Saturday preceding the last Sunday of March and October, 80 respectively. 81 82 83 Release 2020c - 2020-10-16 11:15:53 -0700 84 85 Briefly: 86 Fiji starts DST later than usual, on 2020-12-20. 87 88 Changes to future timestamps 89 90 Fiji will start DST on 2020-12-20, instead of 2020-11-08 as 91 previously predicted. DST will still end on 2021-01-17. 92 (Thanks to Raymond Kumar and Alan Mintz.) Assume for now that 93 the later-than-usual start date is a one-time departure from the 94 recent pattern. 95 96 Changes to build procedure 97 98 Rearguard tarballs now contain an empty file pacificnew. 99 Some older downstream software expects this file to exist. 100 (Problem reported by Mike Cullinan.) 101 102 103 Release 2020b - 2020-10-06 18:35:04 -0700 104 105 Briefly: 106 Revised predictions for Morocco's changes starting in 2023. 107 Canada's Yukon changes to -07 on 2020-11-01, not 2020-03-08. 108 Macquarie Island has stayed in sync with Tasmania since 2011. 109 Casey, Antarctica is at +08 in winter and +11 in summer. 110 zic no longer supports -y, nor the TYPE field of Rules. 111 112 Changes to future timestamps 113 114 Morocco's spring-forward after Ramadan is now predicted to occur 115 no sooner than two days after Ramadan, instead of one day. 116 (Thanks to Milamber.) The first altered prediction is for 2023, 117 now predicted to spring-forward on April 30 instead of April 23. 118 119 Changes to past and future timestamps 120 121 Casey Station, Antarctica has been using +08 in winter and +11 in 122 summer since 2018. The most recent transition from +08 to +11 was 123 2020-10-04 00:01. Also, Macquarie Island has been staying in 124 sync with Tasmania since 2011. (Thanks to Steffen Thorsen.) 125 126 Changes to past and future time zone abbreviations and DST flags 127 128 Canada's Yukon, represented by America/Whitehorse and 129 America/Dawson, changes its time zone rules from -08/-07 to 130 permanent -07 on 2020-11-01, not on 2020-03-08 as 2020a had it. 131 This change affects only the time zone abbreviation (MST vs PDT) 132 and daylight saving flag for the period between the two dates. 133 (Thanks to Andrew G. Smith.) 134 135 Changes to past timestamps 136 137 Correct several transitions for Hungary for 1918/1983. 138 For example, the 1983-09-25 fall-back was at 01:00, not 03:00. 139 (Thanks to Gza Nyry.) Also, the 1890 transition to standard 140 time was on 11-01, not 10-01 (thanks to Michael Deckers). 141 142 The 1891 French transition was on March 16, not March 15. The 143 1911-03-11 French transition was at midnight, not a minute later. 144 Monaco's transitions were on 1892-06-01 and 1911-03-29, not 145 1891-03-15 and 1911-03-11. (Thanks to Michael Deckers.) 146 147 Changes to code 148 149 Support for zic's long-obsolete '-y YEARISTYPE' option has been 150 removed and, with it, so has support for the TYPE field in Rule 151 lines, which is now reserved for compatibility with earlier zic. 152 These features were previously deprecated in release 2015f. 153 (Thanks to Tim Parenti.) 154 155 zic now defaults to '-b slim' instead of to '-b fat'. 156 157 zic's new '-l -' and '-p -' options uninstall any existing 158 localtime and posixrules files, respectively. 159 160 The undocumented and ineffective tzsetwall function has been 161 removed. 162 163 Changes to build procedure 164 165 The Makefile now defaults POSIXRULES to '-', so the posixrules 166 feature (obsolete as of 2019b) is no longer installed by default. 167 168 Changes to documentation and commentary 169 170 The long-obsolete files pacificnew, systemv, and yearistype.sh have 171 been removed from the distribution. (Thanks to Tim Parenti.) 172 173 174 Release 2020a - 2020-04-23 16:03:47 -0700 175 176 Briefly: 177 Morocco springs forward on 2020-05-31, not 2020-05-24. 178 Canada's Yukon advanced to -07 year-round on 2020-03-08. 179 America/Nuuk renamed from America/Godthab. 180 zic now supports expiration dates for leap second lists. 181 182 Changes to future timestamps 183 184 Morocco's second spring-forward transition in 2020 will be May 31, 185 not May 24 as predicted earlier. (Thanks to Semlali Naoufal.) 186 Adjust future-year predictions to use the first Sunday after the 187 day after Ramadan, not the first Sunday after Ramadan. 188 189 Canada's Yukon, represented by America/Whitehorse and 190 America/Dawson, advanced to -07 year-round, beginning with its 191 spring-forward transition on 2020-03-08, and will not fall back on 192 2020-11-01. Although a government press release calls this 193 "permanent Pacific Daylight Saving Time", we prefer MST for 194 consistency with nearby Dawson Creek, Creston, and Fort Nelson. 195 (Thanks to Tim Parenti.) 196 197 Changes to past timestamps 198 199 Shanghai observed DST in 1919. (Thanks to Phake Nick.) 200 201 Changes to timezone identifiers 202 203 To reflect current usage in English better, America/Godthab has 204 been renamed to America/Nuuk. A backwards-compatibility link 205 remains for the old name. 206 207 Changes to code 208 209 localtime.c no longer mishandles timestamps after the last 210 transition in a TZif file with leap seconds and with daylight 211 saving time transitions projected into the indefinite future. 212 For example, with TZ='America/Los_Angeles' with leap seconds, 213 zdump formerly reported a DST transition on 2038-03-14 214 from 01:59:32.999... to 02:59:33 instead of the correct transition 215 from 01:59:59.999... to 03:00:00. 216 217 zic -L now supports an Expires line in the leapseconds file, and 218 truncates the TZif output accordingly. This propagates leap 219 second expiration information into the TZif file, and avoids the 220 abovementioned localtime.c bug as well as similar bugs present in 221 many client implementations. If no Expires line is present, zic 222 -L instead truncates the TZif output based on the #expires comment 223 present in leapseconds files distributed by tzdb 2018f and later; 224 however, this usage is obsolescent. For now, the distributed 225 leapseconds file has an Expires line that is commented out, so 226 that the file can be fed to older versions of zic which ignore the 227 commented-out line. Future tzdb distributions are planned to 228 contain a leapseconds file with an Expires line. 229 230 The configuration macros HAVE_TZNAME and USG_COMPAT should now be 231 set to 1 if the system library supports the feature, and 2 if not. 232 As before, these macros are nonzero if tzcode should support the 233 feature, zero otherwise. 234 235 The configuration macro ALTZONE now has the same values with the 236 same meaning as HAVE_TZNAME and USG_COMPAT. 237 238 The code's defense against CRLF in leap-seconds.list is now 239 portable to POSIX awk. (Problem reported by Deborah Goldsmith.) 240 241 Although the undocumented tzsetwall function is not changed in 242 this release, it is now deprecated in preparation for removal in 243 future releases. Due to POSIX requirements, tzsetwall has not 244 worked for some time. Any code that uses it should instead use 245 tzalloc(NULL) or, if portability trumps thread-safety, should 246 unset the TZ environment variable. 247 248 Changes to commentary 249 250 The les-de-la-Madeleine and the Listuguj reserve are noted as 251 following America/Halifax, and comments about Yukon's "south" and 252 "north" have been corrected to say "east" and "west". (Thanks to 253 Jeffery Nichols.) 254 255 256 Release 2019c - 2019-09-11 08:59:48 -0700 257 258 Briefly: 259 Fiji observes DST from 2019-11-10 to 2020-01-12. 260 Norfolk Island starts observing Australian-style DST. 261 262 Changes to future timestamps 263 264 Fiji's next DST transitions will be 2019-11-10 and 2020-01-12 265 instead of 2019-11-03 and 2020-01-19. (Thanks to Raymond Kumar.) 266 Adjust future guesses accordingly. 267 268 Norfolk Island will observe Australian-style DST starting in 269 spring 2019. The first transition is on 2019-10-06. (Thanks to 270 Kyle Czech and Michael Deckers.) 271 272 Changes to past timestamps 273 274 Many corrections to time in Turkey from 1940 through 1985. 275 (Thanks to Oya Vula via Alois Treindl, and to Kvan Yazan.) 276 277 The Norfolk Island 1975-03-02 transition was at 02:00 standard 278 time, not 02:00 DST. (Thanks to Michael Deckers.) 279 280 South Korea observed DST from 1948 through 1951. Although this 281 info was supposed to appear in release 2014j, a typo inadvertently 282 suppressed the change. (Thanks to Alois Treindl.) 283 284 Detroit observed DST in 1967 and 1968 following the US DST rules, 285 except that its 1967 DST began on June 14 at 00:01. (Thanks to 286 Alois Treindl for pointing out that the old data entries were 287 probably wrong.) 288 289 Fix several errors in pre-1970 transitions in Perry County, IN. 290 (Thanks to Alois Triendl for pointing out the 1967/9 errors.) 291 292 Edmonton did not observe DST in 1967 or 1969. In 1946 Vancouver 293 ended DST on 09-29 not 10-13, and Vienna ended DST on 10-07 not 294 10-06. In 1945 Knigsberg (now Kaliningrad) switched from +01/+02 295 to +02/+03 on 04-10 not 01-01, and its +02/+03 is abbreviated 296 EET/EEST, not CET/CEST. (Thanks to Alois Triendl.) In 1946 297 Knigsberg switched to +03 on 04-07 not 01-01. 298 299 In 1946 Louisville switched from CST to CDT on 04-28 at 00:01, not 300 01-01 at 00:00. (Thanks to Alois Treindl and Michael Deckers.) 301 Also, it switched from CST to CDT on 1950-04-30, not 1947-04-27. 302 303 The 1892-05-01 transition in Brussels was at 00:17:30, not at noon. 304 (Thanks to Michael Deckers.) 305 306 Changes to past time zone abbreviations and DST flags 307 308 Hong Kong Winter Time, observed from 1941-10-01 to 1941-12-25, 309 is now flagged as DST and is abbreviated HKWT not HKT. 310 311 Changes to code 312 313 leapseconds.awk now relies only on its input data, rather than 314 also relying on its comments. (Inspired by code from Dennis 315 Ferguson and Chris Woodbury.) 316 317 The code now defends against CRLFs in leap-seconds.list. 318 (Thanks to Brian Inglis and Chris Woodbury.) 319 320 Changes to documentation and commentary 321 322 theory.html discusses leap seconds. (Thanks to Steve Summit.) 323 324 Nashville's newspapers dueled about the time of day in the 1950s. 325 (Thanks to John Seigenthaler.) 326 327 Liechtenstein observed Swiss DST in 1941/2. 328 (Thanks to Alois Treindl.) 329 330 331 Release 2019b - 2019-07-01 00:09:53 -0700 332 333 Briefly: 334 Brazil no longer observes DST. 335 'zic -b slim' outputs smaller TZif files; please try it out. 336 Palestine's 2019 spring-forward transition was on 03-29, not 03-30. 337 338 Changes to future timestamps 339 340 Brazil has canceled DST and will stay on standard time indefinitely. 341 (Thanks to Steffen Thorsen, Marcus Diniz, and Daniel Soares de 342 Oliveira.) 343 344 Predictions for Morocco now go through 2087 instead of 2037, to 345 work around a problem on newlib when using TZif files output by 346 zic 2019a or earlier. (Problem reported by David Gauchard.) 347 348 Changes to past and future timestamps 349 350 Palestine's 2019 spring transition was 03-29 at 00:00, not 03-30 351 at 01:00. (Thanks to Sharef Mustafa and Even Scharning.) Guess 352 future transitions to be March's last Friday at 00:00. 353 354 Changes to past timestamps 355 356 Hong Kong's 1941-06-15 spring-forward transition was at 03:00, not 357 03:30. Its 1945 transition from JST to HKT was on 11-18 at 02:00, 358 not 09-15 at 00:00. In 1946 its spring-forward transition was on 359 04-21 at 00:00, not the previous day at 03:30. From 1946 through 360 1952 its fall-back transitions occurred at 04:30, not at 03:30. 361 In 1947 its fall-back transition was on 11-30, not 12-30. 362 (Thanks to P Chan.) 363 364 Changes to past time zone abbreviations 365 366 Italy's 1866 transition to Rome Mean Time was on December 12, not 367 September 22. This affects only the time zone abbreviation for 368 Europe/Rome between those dates. (Thanks to Stephen Trainor and 369 Luigi Rosa.) 370 371 Changes affecting metadata only 372 373 Add info about the Crimea situation in zone1970.tab and zone.tab. 374 (Problem reported by Serhii Demediuk.) 375 376 Changes to code 377 378 zic's new -b option supports a way to control data bloat and to 379 test for year-2038 bugs in software that reads TZif files. 380 'zic -b fat' and 'zic -b slim' generate larger and smaller output; 381 for example, changing from fat to slim shrinks the Europe/London 382 file from 3648 to 1599 bytes, saving about 56%. Fat and slim 383 files represent the same set of timestamps and use the same TZif 384 format as documented in tzfile(5) and in Internet RFC 8536. 385 Fat format attempts to work around bugs or incompatibilities in 386 older software, notably software that mishandles 64-bit TZif data 387 or uses obsolete TZ strings like "EET-2EEST" that lack DST rules. 388 Slim format is more efficient and does not work around 64-bit bugs 389 or obsolete TZ strings. Currently zic defaults to fat format 390 unless you compile with -DZIC_BLOAT_DEFAULT=\"slim\"; this 391 out-of-the-box default is intended to change in future releases 392 as the buggy software often mishandles timestamps anyway. 393 394 zic no longer treats a set of rules ending in 2037 specially. 395 Previously, zic assumed that such a ruleset meant that future 396 timestamps could not be predicted, and therefore omitted a 397 POSIX-like TZ string in the TZif output. The old behavior is no 398 longer needed for current tzdata, and caused problems with newlib 399 when used with older tzdata (reported by David Gauchard). 400 401 zic no longer generates some artifact transitions. For example, 402 Europe/London no longer has a no-op transition in January 1996. 403 404 Changes to build procedure 405 406 tzdata.zi now assumes zic 2017c or later. This shrinks tzdata.zi 407 by a percent or so. 408 409 Changes to documentation and commentary 410 411 The Makefile now documents the POSIXRULES macro as being obsolete, 412 and similarly, zic's -p POSIXRULES option is now documented as 413 being obsolete. Although the POSIXRULES feature still exists and 414 works as before, in practice it is rarely used for its intended 415 purpose, and it does not work either in the default reference 416 implementation (for timestamps after 2037) or in common 417 implementations such as GNU/Linux (for contemporary timestamps). 418 Since POSIXRULES was designed primarily as a temporary transition 419 facility for System V platforms that died off decades ago, it is 420 being decommissioned rather than institutionalized. 421 422 New info on Bonin Islands and Marcus (thanks to Wakaba and Phake Nick). 423 424 425 Release 2019a - 2019-03-25 22:01:33 -0700 426 427 Briefly: 428 Palestine "springs forward" on 2019-03-30 instead of 2019-03-23. 429 Metlakatla "fell back" to rejoin Alaska Time on 2019-01-20 at 02:00. 430 431 Changes to past and future timestamps 432 433 Palestine will not start DST until 2019-03-30, instead of 2019-03-23 as 434 previously predicted. Adjust our prediction by guessing that spring 435 transitions will be between 24 and 30 March, which matches recent practice 436 since 2016. (Thanks to Even Scharning and Tim Parenti.) 437 438 Metlakatla ended its observance of Pacific standard time, 439 rejoining Alaska Time, on 2019-01-20 at 02:00. (Thanks to Ryan 440 Stanley and Tim Parenti.) 441 442 Changes to past timestamps 443 444 Israel observed DST in 1980 (08-02/09-13) and 1984 (05-05/08-25). 445 (Thanks to Alois Treindl and Isaac Starkman.) 446 447 Changes to time zone abbreviations 448 449 Etc/UCT is now a backward-compatibility link to Etc/UTC, instead 450 of being a separate zone that generates the abbreviation "UCT", 451 which nowadays is typically a typo. (Problem reported by Isiah 452 Meadows.) 453 454 Changes to code 455 456 zic now has an -r option to limit the time range of output data. 457 For example, 'zic -r @1000000000' limits the output data to 458 timestamps starting 1000000000 seconds after the Epoch. 459 This helps shrink output size and can be useful for applications 460 not needing the full timestamp history, such as TZDIST truncation; 461 see Internet RFC 8536 section 5.1. (Inspired by a feature request 462 from Christopher Wong, helped along by bug reports from Wong and 463 from Tim Parenti.) 464 465 Changes to documentation 466 467 Mention Internet RFC 8536 (February 2019), which documents TZif. 468 469 tz-link.html now cites tzdata-meta 470 <https://tzdata-meta.timtimeonline.com/>. 471 472 473 Release 2018i - 2018-12-30 11:05:43 -0800 474 475 Briefly: 476 So Tom and Prncipe switches from +01 to +00 on 2019-01-01. 477 478 Changes to future timestamps 479 480 Due to a change in government, So Tom and Prncipe switches back 481 from +01 to +00 on 2019-01-01 at 02:00. (Thanks to Vadim 482 Nasardinov and Michael Deckers.) 483 484 485 Release 2018h - 2018-12-23 17:59:32 -0800 486 487 Briefly: 488 Qyzylorda, Kazakhstan moved from +06 to +05 on 2018-12-21. 489 New zone Asia/Qostanay because Qostanay, Kazakhstan didn't move. 490 Metlakatla, Alaska observes PST this winter only. 491 Guess Morocco will continue to adjust clocks around Ramadan. 492 Add predictions for Iran from 2038 through 2090. 493 494 Changes to future timestamps 495 496 Guess that Morocco will continue to fall back just before and 497 spring forward just after Ramadan, the practice since 2012. 498 (Thanks to Maamar Abdelkader.) This means Morocco will observe 499 negative DST during Ramadan in main and vanguard formats, and in 500 rearguard format it stays in the +00 timezone and observes 501 ordinary DST in all months other than Ramadan. As before, extend 502 this guesswork to the year 2037. As a consequence, Morocco is 503 scheduled to observe three DST transitions in some Gregorian years 504 (e.g., 2033) due to the mismatch between the Gregorian and Islamic 505 calendars. 506 507 The table of exact transitions for Iranian DST has been extended. 508 It formerly cut off before the year 2038 in a nod to 32-bit time_t. 509 It now cuts off before 2091 as there is doubt about how the Persian 510 calendar will treat 2091. This change predicts DST transitions in 511 2038-9, 2042-3, and 2046-7 to occur one day later than previously 512 predicted. As before, post-cutoff transitions are approximated. 513 514 Changes to past and future timestamps 515 516 Qyzylorda (aka Kyzylorda) oblast in Kazakhstan moved from +06 to 517 +05 on 2018-12-21. This is a zone split as Qostanay (aka 518 Kostanay) did not switch, so create a zone Asia/Qostanay. 519 520 Metlakatla moved from Alaska to Pacific standard time on 2018-11-04. 521 It did not change clocks that day and remains on -08 this winter. 522 (Thanks to Ryan Stanley.) It will revert to the usual Alaska 523 rules next spring, so this change affects only timestamps 524 from 2018-11-04 through 2019-03-10. 525 526 Change to past timestamps 527 528 Kwajalein's 1993-08-20 transition from -12 to +12 was at 24:00, 529 not 00:00. I transcribed the time incorrectly from Shanks. 530 (Thanks to Phake Nick.) 531 532 Nauru's 1979 transition was on 02-10 at 02:00, not 05-01 at 00:00. 533 (Thanks to Phake Nick.) 534 535 Guam observed DST irregularly from 1959 through 1977. 536 (Thanks to Phake Nick.) 537 538 Hong Kong observed DST in 1941 starting 06-15 (not 04-01), then on 539 10-01 changed standard time to +08:30 (not +08). Its transition 540 back to +08 after WWII was on 1945-09-15, not the previous day. 541 Its 1904-10-30 change took effect at 01:00 +08 (not 00:00 LMT). 542 (Thanks to Phake Nick, Steve Allen, and Joseph Myers.) Also, 543 its 1952 fallback was on 11-02 (not 10-25). 544 545 This release contains many changes to timestamps before 1946 due 546 to Japanese possession or occupation of Pacific/Chuuk, 547 Pacific/Guam, Pacific/Kosrae, Pacific/Kwajalein, Pacific/Majuro, 548 Pacific/Nauru, Pacific/Palau, and Pacific/Pohnpei. 549 (Thanks to Phake Nick.) 550 551 Assume that the Spanish East Indies was like the Philippines and 552 observed American time until the end of 1844. This affects 553 Pacific/Chuuk, Pacific/Kosrae, Pacific/Palau, and Pacific/Pohnpei. 554 555 Changes to past tm_isdst flags 556 557 For the recent Morocco change, the tm_isdst flag should be 1 from 558 2018-10-27 00:00 to 2018-10-28 03:00. (Thanks to Michael Deckers.) 559 Give a URL to the official decree. (Thanks to Matt Johnson.) 560 561 562 Release 2018g - 2018-10-26 22:22:45 -0700 563 564 Briefly: 565 Morocco switches to permanent +01 on 2018-10-28. 566 567 Changes to future timestamps 568 569 Morocco switches from +00/+01 to permanent +01 effective 2018-10-28, 570 so its clocks will not fall back as previously scheduled. 571 (Thanks to Mohamed Essedik Najd and Brian Inglis.) 572 573 Changes to code 574 575 When generating TZif files with leap seconds, zic no longer uses a 576 format that trips up older 32-bit clients, fixing a bug introduced 577 in 2018f. (Reported by Daniel Fischer.) Also, the zic workaround 578 for QTBUG-53071 now also works for TZif files with leap seconds. 579 580 The translator to rearguard format now rewrites the line 581 "Rule Japan 1948 1951 - Sep Sat>=8 25:00 0 S" to 582 "Rule Japan 1948 1951 - Sep Sun>=9 1:00 0 S". 583 This caters to zic before 2007 and to Oracle TZUpdater 2.2.0 584 and earlier. (Reported by Christos Zoulas.) 585 586 Changes to past time zone abbreviations 587 588 Change HDT to HWT/HPT for WWII-era abbreviations in Hawaii. 589 This reverts to 2011h, as the abbreviation change in 2011i was 590 likely inadvertent. 591 592 Changes to documentation 593 594 tzfile.5 has new sections on interoperability issues. 595 596 597 Release 2018f - 2018-10-18 00:14:18 -0700 598 599 Briefly: 600 Volgograd moves from +03 to +04 on 2018-10-28. 601 Fiji ends DST 2019-01-13, not 2019-01-20. 602 Most of Chile changes DST dates, effective 2019-04-06. 603 604 Changes to future timestamps 605 606 Volgograd moves from +03 to +04 on 2018-10-28 at 02:00. 607 (Thanks to Alexander Fetisov and Stepan Golosunov.) 608 609 Fiji ends DST 2019-01-13 instead of the 2019-01-20 previously 610 predicted. (Thanks to Raymond Kumar.) Adjust future predictions 611 accordingly. 612 613 Most of Chile will end DST on the first Saturday in April at 24:00 mainland 614 time, and resume DST on the first Saturday in September at 24:00 mainland 615 time. The changes are effective from 2019-04-06, and do not affect the 616 Magallanes region modeled by America/Punta_Arenas. (Thanks to Juan Correa 617 and Tim Parenti.) Adjust future predictions accordingly. 618 619 Changes to past timestamps 620 621 The 2018-05-05 North Korea 30-minute time zone change took place 622 at 23:30 the previous day, not at 00:00 that day. 623 624 China's 1988 spring-forward transition was on April 17, not 625 April 10. Its DST transitions in 1986/91 were at 02:00, not 00:00. 626 (Thanks to P Chan.) 627 628 Fix several issues for Macau before 1992. Macau's pre-1904 LMT 629 was off by 10 s. Macau switched to +08 in 1904 not 1912, and 630 temporarily switched to +09/+10 during World War II. Macau 631 observed DST in 1942/79, not 1961/80, and there were several 632 errors for transition times and dates. (Thanks to P Chan.) 633 634 The 1948-1951 fallback transitions in Japan were at 25:00 on 635 September's second Saturday, not at 24:00. (Thanks to Phake Nick.) 636 zic turns this into 01:00 on the day after September's second 637 Saturday, which is the best that POSIX or C platforms can do. 638 639 Incorporate 1940-1949 Asia/Shanghai DST transitions from a 2014 640 paper by Li Yu, replacing more-questionable data from Shanks. 641 642 Changes to time zone abbreviations 643 644 Use "PST" and "PDT" for Philippine time. (Thanks to Paul Goyette.) 645 646 Changes to code 647 648 zic now always generates TZif files where time type 0 is used for 649 timestamps before the first transition. This simplifies the 650 reading of TZif files and should not affect behavior of existing 651 TZif readers because the same set of time types is used; only 652 their internal indexes may have changed. This affects only the 653 legacy zones EST5EDT, CST6CDT, MST7MDT, PST8PDT, CET, MET, and 654 EET, which previously used nonzero types for these timestamps. 655 656 Because of the type 0 change, zic no longer outputs a dummy 657 transition at time -2**59 (before the Big Bang), as clients should 658 no longer need this to handle historical timestamps correctly. 659 This reverts a change introduced in 2013d and shrinks most TZif 660 files by a few bytes. 661 662 zic now supports negative time-of-day in Rule and Leap lines, e.g., 663 "Rule X min max - Apr lastSun -6:00 1:00 -" means the transition 664 occurs at 18:00 on the Saturday before the last Sunday in April. 665 This behavior was documented in 2018a but the code did not 666 entirely match the documentation. 667 668 localtime.c no longer requires at least one time type in TZif 669 files that lack transitions or have a POSIX-style TZ string. This 670 future-proofs the code against possible future extensions to the 671 format that would allow TZif files with POSIX-style TZ strings and 672 without transitions or time types. 673 674 A read-access subscript error in localtime.c has been fixed. 675 It could occur only in TZif files with timecnt == 0, something that 676 does not happen in practice now but could happen in future versions. 677 678 localtime.c no longer ignores TZif POSIX-style TZ strings that 679 specify only standard time. Instead, these TZ strings now 680 override the default time type for timestamps after the last 681 transition (or for all timestamps if there are no transitions), 682 just as DST strings specifying DST have always done. 683 684 leapseconds.awk now outputs "#updated" and "#expires" comments, 685 and supports leap seconds at the ends of months other than June 686 and December. (Inspired by suggestions from Chris Woodbury.) 687 688 Changes to documentation 689 690 New restrictions: A Rule name must start with a character that 691 is neither an ASCII digit nor "-" nor "+", and an unquoted name 692 should not use characters in the set "!$%&'()*,/:;<=>?@[\]^`{|}~". 693 The latter restriction makes room for future extensions (a 694 possibility noted by Tom Lane). 695 696 tzfile.5 now documents what time types apply before the first and 697 after the last transition, if any. 698 699 Documentation now uses the spelling "timezone" for a TZ setting 700 that determines timestamp history, and "time zone" for a 701 geographic region currently sharing the same standard time. 702 703 The name "TZif" is now used for the tz binary data format. 704 705 tz-link.htm now mentions the A0 TimeZone Migration utilities. 706 (Thanks to Aldrin Martoq for the link.) 707 708 Changes to build procedure 709 710 New 'make' target 'rearguard_tarballs' to build the rearguard 711 tarball only. This is a convenience on platforms that lack lzip 712 if you want to build the rearguard tarball. (Problem reported by 713 Deborah Goldsmith.) 714 715 tzdata.zi is now more stable from release to release. (Problem 716 noted by Tom Lane.) It is also a bit shorter. 717 718 tzdata.zi now can contain comment lines documenting configuration 719 information, such as which data format was selected, which input 720 files were used, and how leap seconds are treated. (Problems 721 noted by Lester Caine and Brian Inglis.) If the Makefile defaults 722 are used these comment lines are absent, for backward 723 compatibility. A redistributor intending to alter its copy of the 724 files should also append "-LABEL" to the 'version' file's first 725 line, where "LABEL" identifies the redistributor's change. 726 727 728 Release 2018e - 2018-05-01 23:42:51 -0700 729 730 Briefly: 731 732 North Korea switches back to +09 on 2018-05-05. 733 The main format uses negative DST again, for Ireland etc. 734 'make tarballs' now also builds a rearguard tarball. 735 New 's' and 'd' suffixes in SAVE columns of Rule and Zone lines. 736 737 Changes to past and future timestamps 738 739 North Korea switches back from +0830 to +09 on 2018-05-05. 740 (Thanks to Kang Seonghoon, Arthur David Olson, Seo Sanghyeon, 741 and Tim Parenti.) 742 743 Bring back the negative-DST changes of 2018a, except be more 744 compatible with data parsers that do not support negative DST. 745 Also, this now affects historical timestamps in Namibia and the 746 former Czechoslovakia, not just Ireland. The main format now uses 747 negative DST to model timestamps in Europe/Dublin (from 1971 on), 748 Europe/Prague (1946/7), and Africa/Windhoek (1994/2017). This 749 does not affect UT offsets, only time zone abbreviations and the 750 tm_isdst flag. Also, this does not affect rearguard or vanguard 751 formats; effectively the main format now uses vanguard instead of 752 rearguard format. Data parsers that do not support negative DST 753 can still use data from the rearguard tarball described below. 754 755 Changes to build procedure 756 757 The command 'make tarballs' now also builds the tarball 758 tzdataVERSION-rearguard.tar.gz, which is like tzdataVERSION.tar.gz 759 except that it uses rearguard format intended for trailing-edge 760 data parsers. 761 762 Changes to data format and to code 763 764 The SAVE column of Rule and Zone lines can now have an 's' or 'd' 765 suffix, which specifies whether the adjusted time is standard time 766 or daylight saving time. If no suffix is given, daylight saving 767 time is used if and only if the SAVE column is nonzero; this is 768 the longstanding behavior. Although this new feature is not used 769 in tzdata, it could be used to specify the legal time in Namibia 770 1994-2017, as opposed to the popular time (see below). 771 772 Changes to past timestamps 773 774 From 1994 through 2017 Namibia observed DST in winter, not summer. 775 That is, it used negative DST, as Ireland still does. This change 776 does not affect UTC offsets; it affects only the tm_isdst flag and 777 the abbreviation used during summer, which is now CAT, not WAST. 778 Although (as noted by Michael Deckers) summer and winter time were 779 both simply called "standard time" in Namibian law, in common 780 practice winter time was considered to be DST (as noted by Stephen 781 Colebourne). The full effect of this change is only in vanguard 782 and main format; in rearguard format, the tm_isdst flag is still 783 zero in winter and nonzero in summer. 784 785 In 1946/7 Czechoslovakia also observed negative DST in winter. 786 The full effect of this change is only in vanguard and main 787 formats; in rearguard format, it is modeled as plain GMT without 788 daylight saving. Also, the dates of some 1944/5 DST transitions 789 in Czechoslovakia have been changed. 790 791 792 Release 2018d - 2018-03-22 07:05:46 -0700 793 794 Briefly: 795 796 Palestine starts DST a week earlier in 2018. 797 Add support for vanguard and rearguard data consumers. 798 Add subsecond precision to source data format, though not to data. 799 800 Changes to future timestamps 801 802 In 2018, Palestine starts DST on March 24, not March 31. 803 Adjust future predictions accordingly. (Thanks to Sharef Mustafa.) 804 805 Changes to past and future timestamps 806 807 Casey Station in Antarctica changed from +11 to +08 on 2018-03-11 808 at 04:00. (Thanks to Steffen Thorsen.) 809 810 Changes to past timestamps 811 812 Historical transitions for Uruguay, represented by 813 America/Montevideo, have been updated per official legal documents, 814 replacing previous data mainly originating from the inventions of 815 Shanks & Pottenger. This has resulted in adjustments ranging from 816 30 to 90 minutes in either direction over at least two dozen 817 distinct periods ranging from one day to several years in length. 818 A mere handful of pre-1991 transitions are unaffected; data since 819 then has come from more reliable contemporaneous reporting. These 820 changes affect various timestamps in 1920-1923, 1936, 1939, 821 1942-1943, 1959, 1966-1970, 1972, 1974-1980, and 1988-1990. 822 Additionally, Uruguay's pre-standard-time UT offset has been 823 adjusted westward by 7 seconds, from UT-03:44:44 to UT-03:44:51, to 824 match the location of the Observatory of the National Meteorological 825 Institute in Montevideo. 826 (Thanks to Jeremie Bonjour, Tim Parenti, and Michael Deckers.) 827 828 Enderbury and Kiritimati skipped New Year's Eve 1994, not 829 New Year's Day 1995. (Thanks to Kerry Shetline.) 830 831 Fix the 1912-01-01 transition for Portugal and its colonies. 832 This transition was at 00:00 according to the new UT offset, not 833 according to the old one. Also assume that Cape Verde switched on 834 the same date as the rest, not in 1907. This affects 835 Africa/Bissau, Africa/Sao_Tome, Asia/Macau, Atlantic/Azores, 836 Atlantic/Cape_Verde, Atlantic/Madeira, and Europe/Lisbon. 837 (Thanks to Michael Deckers.) 838 839 Fix an off-by-1 error for pre-1913 timestamps in Jamaica and in 840 Turks & Caicos. 841 842 Changes to past time zone abbreviations 843 844 MMT took effect in Uruguay from 1908-06-10, not 1898-06-28. There 845 is no clock change associated with the transition. 846 847 Changes to build procedure 848 849 The new DATAFORM macro in the Makefile lets the installer choose 850 among three source data formats. The idea is to lessen downstream 851 disruption when data formats are improved. 852 853 * DATAFORM=vanguard installs from the latest, bleeding-edge 854 format. DATAFORM=main (the default) installs from the format 855 used in the 'africa' etc. files. DATAFORM=rearguard installs 856 from a trailing-edge format. Eventually, elements of today's 857 vanguard format should move to the main format, and similarly 858 the main format's features should eventually move to the 859 rearguard format. 860 861 * In the current version, the main and rearguard formats are 862 identical and match that of 2018c, so this change does not 863 affect default behavior. The vanguard format currently contains 864 one feature not in the main format: negative SAVE values. This 865 improves support for Ireland, which uses Irish Standard Time 866 (IST, UTC+01) in summer and GMT (UTC) in winter. tzcode has 867 supported negative SAVE values for decades, and this feature 868 should move to the main format soon. However, it will not move 869 to the rearguard format for quite some time because some 870 downstream parsers do not support it. 871 872 * The build procedure constructs three files vanguard.zi, main.zi, 873 and rearguard.zi, one for each format. Although the files 874 represent essentially the same data, they may have minor 875 discrepancies that users are not likely to notice. The files 876 are intended for downstream data consumers and are not 877 installed. Zoneinfo parsers that do not support negative SAVE values 878 should start using rearguard.zi, so that they will be unaffected 879 when the negative-DST feature moves from vanguard to main. 880 Bleeding-edge Zoneinfo parsers that support the new features 881 already can use vanguard.zi; in this respect, current tzcode is 882 bleeding-edge. 883 884 The Makefile should now be safe for parallelized builds, and 'make 885 -j to2050new.tzs' is now much faster on a multiprocessor host 886 with GNU Make. 887 888 When built with -DSUPPRESS_TZDIR, the tzcode library no longer 889 prepends TZDIR/ to file names that do not begin with '/'. This is 890 not recommended for general use, due to its security implications. 891 (From a suggestion by Manuela Friedrich.) 892 893 Changes to code 894 895 zic now accepts subsecond precision in expressions like 896 00:19:32.13, which is approximately the legal time of the 897 Netherlands from 1835 to 1937. However, because it is 898 questionable whether the few recorded uses of non-integer offsets 899 had subsecond precision in practice, there are no plans for tzdata 900 to use this feature. (Thanks to Steve Allen for pointing out 901 the limitations of historical data in this area.) 902 903 The code is a bit more portable to MS-Windows. Installers can 904 compile with -DRESERVE_STD_EXT_IDS on MS-Windows platforms that 905 reserve identifiers like 'localtime'. (Thanks to Manuela 906 Friedrich.) 907 908 Changes to documentation and commentary 909 910 theory.html now outlines tzdb's extensions to POSIX's model for 911 civil time, and has a section "POSIX features no longer needed" 912 that lists POSIX API components that are now vestigial. 913 (From suggestions by Steve Summit.) It also better distinguishes 914 time zones from tz regions. (From a suggestion by Guy Harris.) 915 916 Commentary is now more consistent about using the phrase "daylight 917 saving time", to match the C name tm_isdst. Daylight saving time 918 need not occur in summer, and need not have a positive offset from 919 standard time. 920 921 Commentary about historical transitions in Uruguay has been expanded 922 with links to many relevant legal documents. 923 (Thanks to Tim Parenti.) 924 925 Commentary now uses some non-ASCII characters with Unicode value 926 less than U+0100, as they can be useful and should work even with 927 older editors such as XEmacs. 928 929 930 Release 2018c - 2018-01-22 23:00:44 -0800 931 932 Briefly: 933 Revert Irish changes that relied on negative SAVE values. 934 935 Changes to tm_isdst 936 937 Revert the 2018a change to Europe/Dublin. As before, this change 938 does not affect UT offsets or abbreviations; it affects only 939 whether timestamps are considered to be standard time or 940 daylight-saving time, as expressed in the tm_isdst flag of C's 941 struct tm type. This reversion is intended to be a temporary 942 workaround for problems discovered with downstream uses of 943 releases 2018a and 2018b, which implemented Irish time by using 944 negative SAVE values in the Eire rules of the 'europe' file. 945 Although negative SAVE values have been part of tzcode for many 946 years and are supported by many platforms, they were not 947 documented before 2018a and ICU and OpenJDK do not currently 948 support them. A mechanism to export data to platforms lacking 949 support for negative DST is planned to be developed before the 950 change is reapplied. (Problems reported by Deborah Goldsmith and 951 Stephen Colebourne.) 952 953 Changes to past timestamps 954 955 Japanese DST transitions (1948-1951) were Sundays at 00:00, not 956 Saturdays or Sundays at 02:00. (Thanks to Takayuki Nikai.) 957 958 Changes to build procedure 959 960 The build procedure now works around mawk 1.3.3's lack of support 961 for character class expressions. (Problem reported by Ohyama.) 962 963 964 Release 2018b - 2018-01-17 23:24:48 -0800 965 966 Briefly: 967 Fix a packaging problem in tz2018a, which was missing 'pacificnew'. 968 969 Changes to build procedure 970 971 The distribution now contains the file 'pacificnew' again. 972 This file was inadvertantly omitted in the 2018a distribution. 973 (Problem reported by Matias Fonzo.) 974 975 976 Release 2018a - 2018-01-12 22:29:21 -0800 977 978 Briefly: 979 So Tom and Prncipe switched from +00 to +01. 980 Brazil's DST will now start on November's first Sunday. 981 Ireland's standard time is now in the summer, not the winter. 982 Use Debian-style installation locations, instead of 4.3BSD-style. 983 New zic option -t. 984 985 Changes to past and future timestamps 986 987 So Tom and Prncipe switched from +00 to +01 on 2018-01-01 at 988 01:00. (Thanks to Steffen Thorsen and Michael Deckers.) 989 990 Changes to future timestamps 991 992 Starting in 2018 southern Brazil will begin DST on November's 993 first Sunday instead of October's third Sunday. (Thanks to 994 Steffen Thorsen.) 995 996 Changes to past timestamps 997 998 A discrepancy of 4 s in timestamps before 1931 in South Sudan has 999 been corrected. The 'backzone' and 'zone.tab' files did not agree 1000 with the 'africa' and 'zone1970.tab' files. (Problem reported by 1001 Michael Deckers.) 1002 1003 The abbreviation invented for Bolivia Summer Time (1931-2) is now 1004 BST instead of BOST, to be more consistent with the convention 1005 used for Latvian Summer Time (1918-9) and for British Summer Time. 1006 1007 Changes to tm_isdst 1008 1009 Change Europe/Dublin so that it observes Irish Standard Time (UT 1010 +01) in summer and GMT (as negative daylight-saving) in winter, 1011 instead of observing standard time (GMT) in winter and Irish 1012 Summer Time (UT +01) in summer. This change does not affect UT 1013 offsets or abbreviations; it affects only whether timestamps are 1014 considered to be standard time or daylight-saving time, as 1015 expressed in the tm_isdst flag of C's struct tm type. 1016 (Discrepancy noted by Derick Rethans.) 1017 1018 Changes to build procedure 1019 1020 The default installation locations have been changed to mostly 1021 match Debian circa 2017, instead of being designed as an add-on to 1022 4.3BSD circa 1986. This affects the Makefile macros TOPDIR, 1023 TZDIR, MANDIR, and LIBDIR. New Makefile macros TZDEFAULT, USRDIR, 1024 USRSHAREDIR, BINDIR, ZDUMPDIR, and ZICDIR let installers tailor 1025 locations more precisely. (This responds to suggestions from 1026 Brian Inglis and from Steve Summit.) 1027 1028 The default installation procedure no longer creates the 1029 backward-compatibility link US/Pacific-New, which causes 1030 confusion during user setup (e.g., see Debian bug 815200). 1031 Use 'make BACKWARD="backward pacificnew"' to create the link 1032 anyway, for now. Eventually we plan to remove the link entirely. 1033 1034 tzdata.zi now contains a version-number comment. 1035 (Suggested by Tom Lane.) 1036 1037 The Makefile now quotes values like BACKWARD more carefully when 1038 passing them to the shell. (Problem reported by Zefram.) 1039 1040 Builders no longer need to specify -DHAVE_SNPRINTF on platforms 1041 that have snprintf and use pre-C99 compilers. (Problem reported 1042 by Jon Skeet.) 1043 1044 Changes to code 1045 1046 zic has a new option -t FILE that specifies the location of the 1047 file that determines local time when TZ is unset. The default for 1048 this location can be configured via the new TZDEFAULT makefile 1049 macro, which defaults to /etc/localtime. 1050 1051 Diagnostics and commentary now distinguish UT from UTC more 1052 carefully; see theory.html for more information about UT vs UTC. 1053 1054 zic has been ported to GCC 8's -Wstringop-truncation option. 1055 (Problem reported by Martin Sebor.) 1056 1057 Changes to documentation and commentary 1058 1059 The zic man page now documents the longstanding behavior that 1060 times and years can be out of the usual range, with negative times 1061 counting backwards from midnight and with year 0 preceding year 1. 1062 (Problem reported by Michael Deckers.) 1063 1064 The theory.html file now mentions the POSIX limit of six chars 1065 per abbreviation, and lists alphabetic abbreviations used. 1066 1067 The files tz-art.htm and tz-link.htm have been renamed to 1068 tz-art.html and tz-link.html, respectively, for consistency with 1069 other file names and to simplify web server configuration. 1070 1071 1072 Release 2017c - 2017-10-20 14:49:34 -0700 1073 1074 Briefly: 1075 Northern Cyprus switches from +03 to +02/+03 on 2017-10-29. 1076 Fiji ends DST 2018-01-14, not 2018-01-21. 1077 Namibia switches from +01/+02 to +02 on 2018-04-01. 1078 Sudan switches from +03 to +02 on 2017-11-01. 1079 Tonga likely switches from +13/+14 to +13 on 2017-11-05. 1080 Turks & Caicos switches from -04 to -05/-04 on 2018-11-04. 1081 A new file tzdata.zi now holds a small text copy of all data. 1082 The zic input format has been regularized slightly. 1083 1084 Changes to future timestamps 1085 1086 Northern Cyprus has decided to resume EU rules starting 1087 2017-10-29, thus reinstituting winter time. 1088 1089 Fiji ends DST 2018-01-14 instead of the 2018-01-21 previously 1090 predicted. (Thanks to Dominic Fok.) Adjust future predictions 1091 accordingly. 1092 1093 Namibia will switch from +01 with DST to +02 all year on 1094 2017-09-03 at 02:00. This affects UT offsets starting 2018-04-01 1095 at 02:00. (Thanks to Steffen Thorsen.) 1096 1097 Sudan will switch from +03 to +02 on 2017-11-01. (Thanks to Ahmed 1098 Atyya and Yahia Abdalla.) South Sudan is not switching, so 1099 Africa/Juba is no longer a link to Africa/Khartoum. 1100 1101 Tonga has likely ended its experiment with DST, and will not 1102 adjust its clocks on 2017-11-05. Although Tonga has not announced 1103 whether it will continue to observe DST, the IATA is assuming that 1104 it will not. (Thanks to David Wade.) 1105 1106 Turks & Caicos will switch from -04 all year to -05 with US DST on 1107 2018-03-11 at 03:00. This affects UT offsets starting 2018-11-04 1108 at 02:00. (Thanks to Steffen Thorsen.) 1109 1110 Changes to past timestamps 1111 1112 Namibia switched from +02 to +01 on 1994-03-21, not 1994-04-03. 1113 (Thanks to Arthur David Olson.) 1114 1115 Detroit did not observe DST in 1967. 1116 1117 Use railway time for Asia/Kolkata before 1941, by switching to 1118 Madras local time (UT +052110) in 1870, then to IST (UT +0530) in 1119 1906. Also, treat 1941-2's +0630 as DST, like 1942-5. 1120 1121 Europe/Dublin's 1946 and 1947 fallback transitions occurred at 1122 02:00 standard time, not 02:00 DST. (Thanks to Michael Deckers.) 1123 1124 Pacific/Apia and Pacific/Pago_Pago switched from Antipodean to 1125 American time in 1892, not 1879. (Thanks to Michael Deckers.) 1126 1127 Adjust the 1867 transition in Alaska to better reflect the 1128 historical record, by changing it to occur on 1867-10-18 at 15:30 1129 Sitka time rather than at the start of 1867-10-17 local time. 1130 Although strictly speaking this is accurate only for Sitka, 1131 the rest of Alaska's blanks need to be filled in somehow. 1132 1133 Fix off-by-one errors in UT offsets for Adak and Nome before 1867. 1134 (Thanks to Michael Deckers.) 1135 1136 Add 7 s to the UT offset in Asia/Yangon before 1920. 1137 1138 Changes to zone names 1139 1140 Remove Canada/East-Saskatchewan from the 'backward' file, as it 1141 exceeded the 14-character limit and was an unused misnomer anyway. 1142 1143 Changes to build procedure 1144 1145 To support applications that prefer to read time zone data in text 1146 form, two zic input files tzdata.zi and leapseconds are now 1147 installed by default. The commands 'zic tzdata.zi' and 'zic -L 1148 leapseconds tzdata.zi' can reproduce the tzdata binary files 1149 without and with leap seconds, respectively. To prevent these two 1150 new files from being installed, use 'make TZDATA_TEXT=', and to 1151 suppress leap seconds from the tzdata text installation, use 'make 1152 TZDATA_TEXT=tzdata.zi'. 1153 1154 'make BACKWARD=' now suppresses backward-compatibility names 1155 like 'US/Pacific' that are defined in the 'backward' and 1156 'pacificnew' files. 1157 1158 'make check' now works on systems that lack a UTF-8 locale, 1159 or that lack the nsgmls program. Set UTF8_LOCALE to configure 1160 the name of a UTF-8 locale, if you have one. 1161 1162 Y2K runtime checks are no longer enabled by default. Add 1163 -DDEPRECATE_TWO_DIGIT_YEARS to CFLAGS to enable them, instead of 1164 adding -DNO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU 1165 to disable them. (New name suggested by Brian Inglis.) 1166 1167 The build procedure for zdump now works on AIX 7.1. 1168 (Problem reported by Kees Dekker.) 1169 1170 Changes to code 1171 1172 zic and the reference runtime now reject multiple leap seconds 1173 within 28 days of each other, or leap seconds before the Epoch. 1174 As a result, support for double leap seconds, which was 1175 obsolescent and undocumented, has been removed. Double leap 1176 seconds were an error in the C89 standard; they have never existed 1177 in civil timekeeping. (Thanks to Robert Elz and Bradley White for 1178 noticing glitches in the code that uncovered this problem.) 1179 1180 zic now warns about use of the obsolescent and undocumented -y 1181 option, and about use of the obsolescent TYPE field of Rule lines. 1182 1183 zic now allows unambiguous abbreviations like "Sa" and "Su" for 1184 weekdays; formerly it rejected them due to a bug. Conversely, zic 1185 no longer considers non-prefixes to be abbreviations; for example, 1186 it no longer accepts "lF" as an abbreviation for "lastFriday". 1187 Also, zic warns about the undocumented usage with a "last-" 1188 prefix, e.g., "last-Fri". 1189 1190 Similarly, zic now accepts the unambiguous abbreviation "L" for 1191 "Link" in ordinary context and for "Leap" in leap-second context. 1192 Conversely, zic no longer accepts non-prefixes such as "La" as 1193 abbreviations for words like "Leap". 1194 1195 zic no longer accepts leap second lines in ordinary input, or 1196 ordinary lines in leap second input. Formerly, zic sometimes 1197 warned about this undocumented usage and handled it incorrectly. 1198 1199 The new macro HAVE_TZNAME governs whether the tzname external 1200 variable is exported, instead of USG_COMPAT. USG_COMPAT now 1201 governs only the external variables "timezone" and "daylight". 1202 This change is needed because the three variables are not in the 1203 same category: although POSIX requires tzname, it specifies the 1204 other two variables as optional. Also, USG_COMPAT is now 1 or 0: 1205 if not defined, the code attempts to guess it from other macros. 1206 1207 localtime.c and difftime.c no longer require stdio.h, and .c files 1208 other than zic.c no longer require sys/wait.h. 1209 1210 zdump.c no longer assumes snprintf. (Reported by Jonathan Leffler.) 1211 1212 Calculation of time_t extrema works around a bug in GCC 4.8.4 1213 (Reported by Stan Shebs and Joseph Myers.) 1214 1215 zic.c no longer mistranslates formats of line numbers in non-English 1216 locales. (Problem reported by Benno Schulenberg.) 1217 1218 Several minor changes have been made to the code to make it a 1219 bit easier to port to MS-Windows and Solaris. (Thanks to Kees 1220 Dekker for reporting the problems.) 1221 1222 Changes to documentation and commentary 1223 1224 The two new files 'theory.html' and 'calendars' contain the 1225 contents of the removed file 'Theory'. The goal is to document 1226 tzdb theory more accessibly. 1227 1228 The zic man page now documents abbreviation rules. 1229 1230 tz-link.htm now covers how to apply tzdata changes to clients. 1231 (Thanks to Jorge Fbregas for the AIX link.) It also mentions MySQL. 1232 1233 The leap-seconds.list URL has been updated to something that is 1234 more reliable for tzdb. (Thanks to Tim Parenti and Brian Inglis.) 1235 1236 Release 2017b - 2017-03-17 07:30:38 -0700 1237 1238 Briefly: Haiti has resumed DST. 1239 1240 Changes to past and future timestamps 1241 1242 Haiti resumed observance of DST in 2017. (Thanks to Steffen Thorsen.) 1243 1244 Changes to past timestamps 1245 1246 Liberia changed from -004430 to +00 on 1972-01-07, not 1972-05-01. 1247 1248 Use "MMT" to abbreviate Liberia's time zone before 1972, as "-004430" 1249 is one byte over the POSIX limit. (Problem reported by Derick Rethans.) 1250 1251 Changes to code 1252 1253 The reference localtime implementation now falls back on the 1254 current US daylight-saving transition rules rather than the 1255 1987-2006 rules. This fallback occurs only when (1) the TZ 1256 environment variable has a value like "AST4ADT" that asks 1257 for daylight saving time but does not specify the rules, (2) there 1258 is no file by that name, and (3) the TZDEFRULES file cannot be 1259 loaded. (Thanks to Tom Lane.) 1260 1261 1262 Release 2017a - 2017-02-28 00:05:36 -0800 1263 1264 Briefly: Southern Chile moves from -04/-03 to -03, and Mongolia 1265 discontinues DST. 1266 1267 Changes to future timestamps 1268 1269 Mongolia no longer observes DST. (Thanks to Ganbold Tsagaankhuu.) 1270 1271 Chile's Region of Magallanes moves from -04/-03 to -03 year-round. 1272 Its clocks diverge from America/Santiago starting 2017-05-13 at 1273 23:00, hiving off a new zone America/Punta_Arenas. Although the 1274 Chilean government says this change expires in May 2019, for now 1275 assume it's permanent. (Thanks to Juan Correa and Deborah 1276 Goldsmith.) This also affects Antarctica/Palmer. 1277 1278 Changes to past timestamps 1279 1280 Fix many entries for historical timestamps for Europe/Madrid 1281 before 1979, to agree with tables compiled by Pere Planesas of the 1282 National Astronomical Observatory of Spain. As a side effect, 1283 this changes some timestamps for Africa/Ceuta before 1929, which 1284 are probably guesswork anyway. (Thanks to Steve Allen and 1285 Pierpaolo Bernardi for the heads-ups, and to Michael Deckers for 1286 correcting the 1901 transition.) 1287 1288 Ecuador observed DST from 1992-11-28 to 1993-02-05. 1289 (Thanks to Alois Treindl.) 1290 1291 Asia/Atyrau and Asia/Oral were at +03 (not +04) before 1930-06-21. 1292 (Thanks to Stepan Golosunov.) 1293 1294 Changes to past and future time zone abbreviations 1295 1296 Switch to numeric time zone abbreviations for South America, as 1297 part of the ongoing project of removing invented abbreviations. 1298 This avoids the need to invent an abbreviation for the new Chilean 1299 new zone. Similarly, switch from invented to numeric time zone 1300 abbreviations for Afghanistan, American Samoa, the Azores, 1301 Bangladesh, Bhutan, the British Indian Ocean Territory, Brunei, 1302 Cape Verde, Chatham Is, Christmas I, Cocos (Keeling) Is, Cook Is, 1303 Dubai, East Timor, Eucla, Fiji, French Polynesia, Greenland, 1304 Indochina, Iran, Iraq, Kiribati, Lord Howe, Macquarie, Malaysia, 1305 the Maldives, Marshall Is, Mauritius, Micronesia, Mongolia, 1306 Myanmar, Nauru, Nepal, New Caledonia, Niue, Norfolk I, Palau, 1307 Papua New Guinea, the Philippines, Pitcairn, Qatar, Runion, St 1308 Pierre & Miquelon, Samoa, Saudi Arabia, Seychelles, Singapore, 1309 Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, Wallis & Futuna, and 1310 Xinjiang; for 20-minute daylight saving time in Ghana before 1943; 1311 for half-hour daylight saving time in Belize before 1944 and in 1312 the Dominican Republic before 1975; and for Canary Islands before 1313 1946, for Guinea-Bissau before 1975, for Iceland before 1969, for 1314 Indian Summer Time before 1942, for Indonesia before around 1964, 1315 for Kenya before 1960, for Liberia before 1973, for Madeira before 1316 1967, for Namibia before 1943, for the Netherlands in 1937-9, for 1317 Pakistan before 1971, for Western Sahara before 1977, and for 1318 Zaporozhye in 1880-1924. 1319 1320 For Alaska time from 1900 through 1967, instead of "CAT" use the 1321 abbreviation "AST", the abbreviation commonly used at the time 1322 (Atlantic Standard Time had not been standardized yet). Use "AWT" 1323 and "APT" instead of the invented abbreviations "CAWT" and "CAPT". 1324 1325 Use "CST" and "CDT" instead of invented abbreviations for Macau 1326 before 1999 and Taiwan before 1938, and use "JST" instead of the 1327 invented abbreviation "JCST" for Japan and Korea before 1938. 1328 1329 Change to database entry category 1330 1331 Move the Pacific/Johnston link from 'australasia' to 'backward', 1332 since Johnston is now uninhabited. 1333 1334 Changes to code 1335 1336 zic no longer mishandles some transitions in January 2038 when it 1337 attempts to work around Qt bug 53071. This fixes a bug affecting 1338 Pacific/Tongatapu that was introduced in zic 2016e. localtime.c 1339 now contains a workaround, useful when loading a file generated by 1340 a buggy zic. (Problem and localtime.c fix reported by Bradley 1341 White.) 1342 1343 zdump -i now outputs non-hour numeric time zone abbreviations 1344 without a colon, e.g., "+0530" rather than "+05:30". This agrees 1345 with zic %z and with common practice, and simplifies auditing of 1346 zdump output. 1347 1348 zdump is now buildable again with -DUSE_LTZ=0. 1349 (Problem reported by Joseph Myers.) 1350 1351 zdump.c now always includes private.h, to avoid code duplication 1352 with private.h. (Problem reported by Kees Dekker.) 1353 1354 localtime.c no longer mishandles early or late timestamps 1355 when TZ is set to a POSIX-style string that specifies DST. 1356 (Problem reported by Kees Dekker.) 1357 1358 date and strftime now cause %z to generate "-0000" instead of 1359 "+0000" when the UT offset is zero and the time zone abbreviation 1360 begins with "-". 1361 1362 Changes to documentation and commentary 1363 1364 The 'Theory' file now better documents choice of historical time 1365 zone abbreviations. (Problems reported by Michael Deckers.) 1366 1367 tz-link.htm now covers leap smearing, which is popular in clouds. 1368 1369 1370 Release 2016j - 2016-11-22 23:17:13 -0800 1371 1372 Briefly: Saratov, Russia moves from +03 to +04 on 2016-12-04. 1373 1374 Changes to future timestamps 1375 1376 Saratov, Russia switches from +03 to +04 on 2016-12-04 at 02:00. 1377 This hives off a new zone Europe/Saratov from Europe/Volgograd. 1378 (Thanks to Yuri Konotopov and Stepan Golosunov.) 1379 1380 Changes to past timestamps 1381 1382 The new zone Asia/Atyrau for Atyra Region, Kazakhstan, is like 1383 Asia/Aqtau except it switched from +05/+06 to +04/+05 in spring 1384 1999, not fall 1994. (Thanks to Stepan Golosunov.) 1385 1386 Changes to past time zone abbreviations 1387 1388 Asia/Gaza and Asia/Hebron now use "EEST", not "EET", to denote 1389 summer time before 1948. The old use of "EET" was a typo. 1390 1391 Changes to code 1392 1393 zic no longer mishandles file systems that lack hard links, fixing 1394 bugs introduced in 2016g. (Problems reported by Tom Lane.) 1395 Also, when the destination already contains symbolic links, zic 1396 should now work better on systems where the 'link' system call 1397 does not follow symbolic links. 1398 1399 Changes to documentation and commentary 1400 1401 tz-link.htm now documents the relationship between release version 1402 numbers and development-repository commit tags. (Suggested by 1403 Paul Koning.) 1404 1405 The 'Theory' file now documents UT. 1406 1407 iso3166.tab now accents "Curaao", and commentary now mentions 1408 the names "Cabo Verde" and "Czechia". (Thanks to Ji Boh.) 1409 1410 1411 Release 2016i - 2016-11-01 23:19:52 -0700 1412 1413 Briefly: Cyprus split into two time zones on 2016-10-30, and Tonga 1414 reintroduces DST on 2016-11-06. 1415 1416 Changes to future timestamps 1417 1418 Pacific/Tongatapu begins DST on 2016-11-06 at 02:00, ending on 1419 2017-01-15 at 03:00. Assume future observances in Tonga will be 1420 from the first Sunday in November through the third Sunday in 1421 January, like Fiji. (Thanks to Pulu Anau.) Switch to numeric 1422 time zone abbreviations for this zone. 1423 1424 Changes to past and future timestamps 1425 1426 Northern Cyprus is now +03 year round, causing a split in Cyprus 1427 time zones starting 2016-10-30 at 04:00. This creates a zone 1428 Asia/Famagusta. (Thanks to Even Scharning and Matt Johnson.) 1429 1430 Antarctica/Casey switched from +08 to +11 on 2016-10-22. 1431 (Thanks to Steffen Thorsen.) 1432 1433 Changes to past timestamps 1434 1435 Several corrections were made for pre-1975 timestamps in Italy. 1436 These affect Europe/Malta, Europe/Rome, Europe/San_Marino, and 1437 Europe/Vatican. 1438 1439 First, the 1893-11-01 00:00 transition in Italy used the new UT 1440 offset (+01), not the old (+00:49:56). (Thanks to Michael 1441 Deckers.) 1442 1443 Second, rules for daylight saving in Italy were changed to agree 1444 with Italy's National Institute of Metrological Research (INRiM) 1445 except for 1944, as follows (thanks to Pierpaolo Bernardi, Brian 1446 Inglis, and Michael Deckers): 1447 1448 The 1916-06-03 transition was at 24:00, not 00:00. 1449 1450 The 1916-10-01, 1919-10-05, and 1920-09-19 transitions were at 1451 00:00, not 01:00. 1452 1453 The 1917-09-30 and 1918-10-06 transitions were at 24:00, not 1454 01:00. 1455 1456 The 1944-09-17 transition was at 03:00, not 01:00. This 1457 particular change is taken from Italian law as INRiM's table, 1458 (which says 02:00) appears to have a typo here. Also, keep the 1459 1944-04-03 transition for Europe/Rome, as Rome was controlled by 1460 Germany then. 1461 1462 The 1967-1970 and 1972-1974 fallback transitions were at 01:00, 1463 not 00:00. 1464 1465 Changes to code 1466 1467 The code should now be buildable on AmigaOS merely by setting the 1468 appropriate Makefile variables. (From a patch by Carsten Larsen.) 1469 1470 1471 Release 2016h - 2016-10-19 23:17:57 -0700 1472 1473 Changes to future timestamps 1474 1475 Asia/Gaza and Asia/Hebron end DST on 2016-10-29 at 01:00, not 1476 2016-10-21 at 00:00. (Thanks to Sharef Mustafa.) Predict that 1477 future fall transitions will be on the last Saturday of October 1478 at 01:00, which is consistent with predicted spring transitions 1479 on the last Saturday of March. (Thanks to Tim Parenti.) 1480 1481 Changes to past timestamps 1482 1483 In Turkey, transitions in 1986-1990 were at 01:00 standard time 1484 not at 02:00, and the spring 1994 transition was on March 20, not 1485 March 27. (Thanks to Kvan Yazan.) 1486 1487 Changes to past and future time zone abbreviations 1488 1489 Asia/Colombo now uses numeric time zone abbreviations like "+0530" 1490 instead of alphabetic ones like "IST" and "LKT". Various 1491 English-language sources use "IST", "LKT" and "SLST", with no 1492 working consensus. (Usage of "SLST" mentioned by Sadika 1493 Sumanapala.) 1494 1495 Changes to code 1496 1497 zic no longer mishandles relativizing file names when creating 1498 symbolic links like /etc/localtime, when these symbolic links 1499 are outside the usual directory hierarchy. This fixes a bug 1500 introduced in 2016g. (Problem reported by Andreas Stieger.) 1501 1502 Changes to build procedure 1503 1504 New rules 'traditional_tarballs' and 'traditional_signatures' for 1505 building just the traditional-format distribution. (Requested by 1506 Deborah Goldsmith.) 1507 1508 The file 'version' is now put into the tzdata tarball too. 1509 (Requested by Howard Hinnant.) 1510 1511 Changes to documentation and commentary 1512 1513 The 'Theory' file now has a section on interface stability. 1514 (Requested by Paul Koning.) It also mentions features like 1515 tm_zone and localtime_rz that have long been supported by the 1516 reference code. 1517 1518 tz-link.htm has improved coverage of time zone boundaries suitable 1519 for geolocation. (Thanks to heads-ups from Evan Siroky and Matt 1520 Johnson.) 1521 1522 The US commentary now mentions Allen and the "day of two noons". 1523 1524 The Fiji commentary mentions the government's 2016-10-03 press 1525 release. (Thanks to Raymond Kumar.) 1526 1527 1528 Release 2016g - 2016-09-13 08:56:38 -0700 1529 1530 Changes to future timestamps 1531 1532 Turkey switched from EET/EEST (+02/+03) to permanent +03, 1533 effective 2016-09-07. (Thanks to Burak AYDIN.) Use "+03" rather 1534 than an invented abbreviation for the new time. 1535 1536 New leap second 2016-12-31 23:59:60 UTC as per IERS Bulletin C 52. 1537 (Thanks to Tim Parenti.) 1538 1539 Changes to past timestamps 1540 1541 For America/Los_Angeles, spring-forward transition times have been 1542 corrected from 02:00 to 02:01 in 1948, and from 02:00 to 01:00 in 1543 1950-1966. 1544 1545 For zones using Soviet time on 1919-07-01, transitions to UT-based 1546 time were at 00:00 UT, not at 02:00 local time. The affected 1547 zones are Europe/Kirov, Europe/Moscow, Europe/Samara, and 1548 Europe/Ulyanovsk. (Thanks to Alexander Belopolsky.) 1549 1550 Changes to past and future time zone abbreviations 1551 1552 The Factory zone now uses the time zone abbreviation -00 instead 1553 of a long English-language string, as -00 is now the normal way to 1554 represent an undefined time zone. 1555 1556 Several zones in Antarctica and the former Soviet Union, along 1557 with zones intended for ships at sea that cannot use POSIX TZ 1558 strings, now use numeric time zone abbreviations instead of 1559 invented or obsolete alphanumeric abbreviations. The affected 1560 zones are Antarctica/Casey, Antarctica/Davis, 1561 Antarctica/DumontDUrville, Antarctica/Mawson, Antarctica/Rothera, 1562 Antarctica/Syowa, Antarctica/Troll, Antarctica/Vostok, 1563 Asia/Anadyr, Asia/Ashgabat, Asia/Baku, Asia/Bishkek, Asia/Chita, 1564 Asia/Dushanbe, Asia/Irkutsk, Asia/Kamchatka, Asia/Khandyga, 1565 Asia/Krasnoyarsk, Asia/Magadan, Asia/Omsk, Asia/Sakhalin, 1566 Asia/Samarkand, Asia/Srednekolymsk, Asia/Tashkent, Asia/Tbilisi, 1567 Asia/Ust-Nera, Asia/Vladivostok, Asia/Yakutsk, Asia/Yekaterinburg, 1568 Asia/Yerevan, Etc/GMT-14, Etc/GMT-13, Etc/GMT-12, Etc/GMT-11, 1569 Etc/GMT-10, Etc/GMT-9, Etc/GMT-8, Etc/GMT-7, Etc/GMT-6, Etc/GMT-5, 1570 Etc/GMT-4, Etc/GMT-3, Etc/GMT-2, Etc/GMT-1, Etc/GMT+1, Etc/GMT+2, 1571 Etc/GMT+3, Etc/GMT+4, Etc/GMT+5, Etc/GMT+6, Etc/GMT+7, Etc/GMT+8, 1572 Etc/GMT+9, Etc/GMT+10, Etc/GMT+11, Etc/GMT+12, Europe/Kaliningrad, 1573 Europe/Minsk, Europe/Samara, Europe/Volgograd, and 1574 Indian/Kerguelen. For Europe/Moscow the invented abbreviation MSM 1575 was replaced by +05, whereas MSK and MSD were kept as they are not 1576 our invention and are widely used. 1577 1578 Changes to zone names 1579 1580 Rename Asia/Rangoon to Asia/Yangon, with a backward compatibility link. 1581 (Thanks to David Massoud.) 1582 1583 Changes to code 1584 1585 zic no longer generates binary files containing POSIX TZ-like 1586 strings that disagree with the local time type after the last 1587 explicit transition in the data. This fixes a bug with 1588 Africa/Casablanca and Africa/El_Aaiun in some year-2037 timestamps 1589 on the reference platform. (Thanks to Alexander Belopolsky for 1590 reporting the bug and suggesting a way forward.) 1591 1592 If the installed localtime and/or posixrules files are symbolic 1593 links, zic now keeps them symbolic links when updating them, for 1594 compatibility with platforms like OpenSUSE where other programs 1595 configure these files as symlinks. 1596 1597 zic now avoids hard linking to symbolic links, avoids some 1598 unnecessary mkdir and stat system calls, and uses shorter file 1599 names internally. 1600 1601 zdump has a new -i option to generate transitions in a 1602 more-compact but still human-readable format. This option is 1603 experimental, and the output format may change in future versions. 1604 (Thanks to Jon Skeet for suggesting that an option was needed, 1605 and thanks to Tim Parenti and Chris Rovick for further comments.) 1606 1607 Changes to build procedure 1608 1609 An experimental distribution format is available, in addition 1610 to the traditional format which will continue to be distributed. 1611 The new format is a tarball tzdb-VERSION.tar.lz with signature 1612 file tzdb-VERSION.tar.lz.asc. It unpacks to a top-level directory 1613 tzdb-VERSION containing the code and data of the traditional 1614 two-tarball format, along with extra data that may be useful. 1615 (Thanks to Antonio Diaz Diaz, Oscar van Vlijmen, and many others 1616 for comments about the experimental format.) 1617 1618 The release version number is now more accurate in the usual case 1619 where releases are built from a Git repository. For example, if 1620 23 commits and some working-file changes have been made since 1621 release 2016g, the version number is now something like 1622 '2016g-23-g50556e3-dirty' instead of the misleading '2016g'. 1623 Tagged releases use the same version number format as before, 1624 e.g., '2016g'. To support the more-accurate version number, its 1625 specification has moved from a line in the Makefile to a new 1626 source file 'version'. 1627 1628 The experimental distribution contains a file to2050.tzs that 1629 contains what should be the output of 'zdump -i -c 2050' on 1630 primary zones. If this file is available, 'make check' now checks 1631 that zdump generates this output. 1632 1633 'make check_web' now works on Fedora-like distributions. 1634 1635 Changes to documentation and commentary 1636 1637 tzfile.5 now documents the new restriction on POSIX TZ-like 1638 strings that is now implemented by zic. 1639 1640 Comments now cite URLs for some 1917-1921 Russian DST decrees. 1641 (Thanks to Alexander Belopolsky.) 1642 1643 tz-link.htm mentions JuliaTime (thanks to Curtis Vogt) and Time4J 1644 (thanks to Meno Hochschild) and ThreeTen-Extra, and its 1645 description of Java 8 has been brought up to date (thanks to 1646 Stephen Colebourne). Its description of local time on Mars has 1647 been updated to match current practice, and URLs have been updated 1648 and some obsolete ones removed. 1649 1650 1651 Release 2016f - 2016-07-05 16:26:51 +0200 1652 1653 Changes affecting future timestamps 1654 1655 The Egyptian government changed its mind on short notice, and 1656 Africa/Cairo will not introduce DST starting 2016-07-07 after all. 1657 (Thanks to Mina Samuel.) 1658 1659 Asia/Novosibirsk switches from +06 to +07 on 2016-07-24 at 02:00. 1660 (Thanks to Stepan Golosunov.) 1661 1662 Changes to past and future timestamps 1663 1664 Asia/Novokuznetsk and Asia/Novosibirsk now use numeric time zone 1665 abbreviations instead of invented ones. 1666 1667 Changes affecting past timestamps 1668 1669 Europe/Minsk's 1992-03-29 spring-forward transition was at 02:00 not 00:00. 1670 (Thanks to Stepan Golosunov.) 1671 1672 1673 Release 2016e - 2016-06-14 08:46:16 -0700 1674 1675 Changes affecting future timestamps 1676 1677 Africa/Cairo observes DST in 2016 from July 7 to the end of October. 1678 Guess October 27 and 24:00 transitions. (Thanks to Steffen Thorsen.) 1679 For future years, guess April's last Thursday to October's last 1680 Thursday except for Ramadan. 1681 1682 Changes affecting past timestamps 1683 1684 Locations while uninhabited now use '-00', not 'zzz', as a 1685 placeholder time zone abbreviation. This is inspired by Internet 1686 RFC 3339 and is more consistent with numeric time zone 1687 abbreviations already used elsewhere. The change affects several 1688 arctic and antarctic locations, e.g., America/Cambridge_Bay before 1689 1920 and Antarctica/Troll before 2005. 1690 1691 Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was 1692 at 03:00, not 23:00 the previous day. (Thanks to Michael Deckers.) 1693 1694 Changes to code 1695 1696 zic now outputs a dummy transition at time 2**31 - 1 in zones 1697 whose POSIX-style TZ strings contain a '<'. This mostly works 1698 around Qt bug 53071 <https://bugreports.qt.io/browse/QTBUG-53071>. 1699 (Thanks to Zhanibek Adilbekov for reporting the Qt bug.) 1700 1701 Changes affecting documentation and commentary 1702 1703 tz-link.htm says why governments should give plenty of notice for 1704 time zone or DST changes, and refers to Matt Johnson's blog post. 1705 1706 tz-link.htm mentions Tzdata for Elixir. (Thanks to Matt Johnson.) 1707 1708 1709 Release 2016d - 2016-04-17 22:50:29 -0700 1710 1711 Changes affecting future timestamps 1712 1713 America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30. 1714 (Thanks to Alexander Krivenyshev for the heads-up.) 1715 1716 Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00. 1717 (Thanks to Alexander Krivenyshev and Matt Johnson.) 1718 1719 New zone Asia/Tomsk, split off from Asia/Novosibirsk. It covers 1720 Tomsk Oblast, Russia, which switches from +06 to +07 on 2016-05-29 1721 at 02:00. (Thanks to Stepan Golosunov.) 1722 1723 Changes affecting past timestamps 1724 1725 New zone Europe/Kirov, split off from Europe/Volgograd. It covers 1726 Kirov Oblast, Russia, which switched from +04/+05 to +03/+04 on 1727 1989-03-26 at 02:00, roughly a year after Europe/Volgograd made 1728 the same change. (Thanks to Stepan Golosunov.) 1729 1730 Russia and nearby locations had daylight-saving transitions on 1731 1992-03-29 at 02:00 and 1992-09-27 at 03:00, instead of on 1732 1992-03-28 at 23:00 and 1992-09-26 at 23:00. (Thanks to Stepan 1733 Golosunov.) 1734 1735 Many corrections to historical time in Kazakhstan from 1991 1736 through 2005. (Thanks to Stepan Golosunov.) Replace Kazakhstan's 1737 invented time zone abbreviations with numeric abbreviations. 1738 1739 Changes to commentary 1740 1741 Mention Internet RFCs 7808 (TZDIST) and 7809 (CalDAV time zone references). 1742 1743 1744 Release 2016c - 2016-03-23 00:51:27 -0700 1745 1746 Changes affecting future timestamps 1747 1748 Azerbaijan no longer observes DST. (Thanks to Steffen Thorsen.) 1749 1750 Chile reverts from permanent to seasonal DST. (Thanks to Juan 1751 Correa for the heads-up, and to Tim Parenti for corrections.) 1752 Guess that future transitions are August's and May's second 1753 Saturdays at 24:00 mainland time. Also, call the period from 1754 2014-09-07 through 2016-05-14 daylight saving time instead of 1755 standard time, as that seems more appropriate now. 1756 1757 Changes affecting past timestamps 1758 1759 Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to 1760 +02/+03 on 1989-03-26, not 1991-03-31. Europe/Volgograd changed 1761 from +04/+05 to +03/+04 on 1988-03-27, not 1989-03-26. 1762 (Thanks to Stepan Golosunov.) 1763 1764 Changes to commentary 1765 1766 Several updates and URLs for historical and proposed Russian changes. 1767 (Thanks to Stepan Golosunov, Matt Johnson, and Alexander Krivenyshev.) 1768 1769 1770 Release 2016b - 2016-03-12 17:30:14 -0800 1771 1772 Compatibility note 1773 1774 Starting with release 2016b, some data entries cause zic implementations 1775 derived from tz releases 2005j through 2015e to issue warnings like 1776 "time zone abbreviation differs from POSIX standard (+03)". 1777 These warnings should not otherwise affect zic's output and can safely be 1778 ignored on today's platforms, as the warnings refer to a restriction in 1779 POSIX.1-1988 that was removed in POSIX.1-2001. One way to suppress the 1780 warnings is to upgrade to zic derived from tz releases 2015f and later. 1781 1782 Changes affecting future timestamps 1783 1784 New zones Europe/Astrakhan and Europe/Ulyanovsk for Astrakhan and 1785 Ulyanovsk Oblasts, Russia, both of which will switch from +03 to +04 on 1786 2016-03-27 at 02:00 local time. They need distinct zones since their 1787 post-1970 histories disagree. New zone Asia/Barnaul for Altai Krai and 1788 Altai Republic, Russia, which will switch from +06 to +07 on the same date 1789 and local time. The Astrakhan change is already official; the others have 1790 passed the first reading in the State Duma and are extremely likely. 1791 Also, Asia/Sakhalin moves from +10 to +11 on 2016-03-27 at 02:00. 1792 (Thanks to Alexander Krivenyshev for the heads-up, and to Matt Johnson 1793 and Stepan Golosunov for followup.) 1794 1795 As a trial of a new system that needs less information to be made up, 1796 the new zones use numeric time zone abbreviations like "+04" 1797 instead of invented abbreviations like "ASTT". 1798 1799 Haiti will not observe DST in 2016. (Thanks to Jean Antoine via 1800 Steffen Thorsen.) 1801 1802 Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00. 1803 (Thanks to Hannah Kreitem.) Guess future transitions will be March's last 1804 Saturday at 01:00, not March's last Friday at 24:00. 1805 1806 Changes affecting past timestamps 1807 1808 Europe/Chisinau observed DST during 1990, and switched from +04 to 1809 +03 at 1990-05-06 02:00, instead of switching from +03 to +02. 1810 (Thanks to Stepan Golosunov.) 1811 1812 1991 abbreviations in Europe/Samara should be SAMT/SAMST, not 1813 KUYT/KUYST. (Thanks to Stepan Golosunov.) 1814 1815 Changes to code 1816 1817 tzselect's diagnostics and checking, and checktab.awk's checking, 1818 have been improved. (Thanks to J William Piggott.) 1819 1820 tzcode now builds under MinGW. (Thanks to Ian Abbott and Esben Haabendal.) 1821 1822 tzselect now tests Julian-date TZ settings more accurately. 1823 (Thanks to J William Piggott.) 1824 1825 Changes to commentary 1826 1827 Comments in zone tables have been improved. (Thanks to J William Piggott.) 1828 1829 tzselect again limits its menu comments so that menus fit on a 1830 2480 alphanumeric display. 1831 1832 A new web page tz-how-to.html. (Thanks to Bill Seymour.) 1833 1834 In the Theory file, the description of possible time zone abbreviations in 1835 tzdata has been cleaned up, as the old description was unclear and 1836 inconsistent. (Thanks to Alain Mouette for reporting the problem.) 1837 1838 1839 Release 2016a - 2016-01-26 23:28:02 -0800 1840 1841 Changes affecting future timestamps 1842 1843 America/Cayman will not observe daylight saving this year after all. 1844 Revert our guess that it would. (Thanks to Matt Johnson.) 1845 1846 Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00. 1847 (Thanks to Alexander Krivenyshev.) 1848 1849 Asia/Tehran now has DST predictions for the year 2038 and later, 1850 to be March 21 00:00 to September 21 00:00. This is likely better 1851 than predicting no DST, albeit off by a day every now and then. 1852 1853 Changes affecting past and future timestamps 1854 1855 America/Metlakatla switched from PST all year to AKST/AKDT on 1856 2015-11-01 at 02:00. (Thanks to Steffen Thorsen.) 1857 1858 America/Santa_Isabel has been removed, and replaced with a 1859 backward compatibility link to America/Tijuana. Its contents were 1860 apparently based on a misreading of Mexican legislation. 1861 1862 Changes affecting past timestamps 1863 1864 Asia/Karachi's two transition times in 2002 were off by a minute. 1865 (Thanks to Matt Johnson.) 1866 1867 Changes affecting build procedure 1868 1869 An installer can now combine leap seconds with use of the backzone file, 1870 e.g., with 'make PACKRATDATA=backzone REDO=posix_right zones'. 1871 The old 'make posix_packrat' rule is now marked as obsolescent. 1872 (Thanks to Ian Abbott for an initial implementation.) 1873 1874 Changes affecting documentation and commentary 1875 1876 A new file LICENSE makes it easier to see that the code and data 1877 are mostly public-domain. (Thanks to James Knight.) The three 1878 non-public-domain files now use the current (3-clause) BSD license 1879 instead of older versions of that license. 1880 1881 tz-link.htm mentions the BDE library (thanks to Andrew Paprocki), 1882 CCTZ (thanks to Tim Parenti), TimeJones.com, and has a new section 1883 on editing tz source files (with a mention of Sublime zoneinfo, 1884 thanks to Gilmore Davidson). 1885 1886 The Theory and asia files now mention the 2015 book "The Global 1887 Transformation of Time, 1870-1950", and cite a couple of reviews. 1888 1889 The America/Chicago entry now documents the informal use of US 1890 central time in Fort Pierre, South Dakota. (Thanks to Rick 1891 McDermid, Matt Johnson, and Steve Jones.) 1892 1893 1894 Release 2015g - 2015-10-01 00:39:51 -0700 1895 1896 Changes affecting future timestamps 1897 1898 Turkey's 2015 fall-back transition is scheduled for Nov. 8, not Oct. 25. 1899 (Thanks to Fatih.) 1900 1901 Norfolk moves from +1130 to +1100 on 2015-10-04 at 02:00 local time. 1902 (Thanks to Alexander Krivenyshev.) 1903 1904 Fiji's 2016 fall-back transition is scheduled for January 17, not 24. 1905 (Thanks to Ken Rylander.) 1906 1907 Fort Nelson, British Columbia will not fall back on 2015-11-01. It has 1908 effectively been on MST (-0700) since it advanced its clocks on 2015-03-08. 1909 New zone America/Fort_Nelson. (Thanks to Matt Johnson.) 1910 1911 Changes affecting past timestamps 1912 1913 Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00. 1914 1915 Changes affecting code 1916 1917 localtime no longer mishandles America/Anchorage after 2037. 1918 (Thanks to Bradley White for reporting the bug.) 1919 1920 On hosts with signed 32-bit time_t, localtime no longer mishandles 1921 Pacific/Fiji after 2038-01-16 14:00 UTC. 1922 1923 The localtime module allows the variables 'timezone', 'daylight', 1924 and 'altzone' to be in common storage shared with other modules, 1925 and declares them in case the system <time.h> does not. 1926 (Problems reported by Kees Dekker.) 1927 1928 On platforms with tm_zone, strftime.c now assumes it is not NULL. 1929 This simplifies the code and is consistent with zdump.c. 1930 (Problem reported by Christos Zoulas.) 1931 1932 Changes affecting documentation 1933 1934 The tzfile man page now documents that transition times denote the 1935 starts (not the ends) of the corresponding time periods. 1936 (Ambiguity reported by Bill Seymour.) 1937 1938 1939 Release 2015f - 2015-08-10 18:06:56 -0700 1940 1941 Changes affecting future timestamps 1942 1943 North Korea switches to +0830 on 2015-08-15. (Thanks to Steffen Thorsen.) 1944 The abbreviation remains "KST". (Thanks to Robert Elz.) 1945 1946 Uruguay no longer observes DST. (Thanks to Steffen Thorsen 1947 and Pablo Camargo.) 1948 1949 Changes affecting past and future timestamps 1950 1951 Moldova starts and ends DST at 00:00 UTC, not at 01:00 UTC. 1952 (Thanks to Roman Tudos.) 1953 1954 Changes affecting data format and code 1955 1956 zic's '-y YEARISTYPE' option is no longer documented. The TYPE 1957 field of a Rule line should now be '-'; the old values 'even', 1958 'odd', 'uspres', 'nonpres', 'nonuspres' were already undocumented. 1959 Although the implementation has not changed, these features do not 1960 work in the default installation, they are not used in the data, 1961 and they are now considered obsolescent. 1962 1963 zic now checks that two rules don't take effect at the same time. 1964 (Thanks to Jon Skeet and Arthur David Olson.) Constraints on 1965 simultaneity are now documented. 1966 1967 The two characters '%z' in a zone format now stand for the UT 1968 offset, e.g., '-07' for seven hours behind UT and '+0530' for 1969 five hours and thirty minutes ahead. This better supports time 1970 zone abbreviations conforming to POSIX.1-2001 and later. 1971 1972 Changes affecting installed data files 1973 1974 Comments for America/Halifax and America/Glace_Bay have been improved. 1975 (Thanks to Brian Inglis.) 1976 1977 Data entries have been simplified for Atlantic/Canary, Europe/Simferopol, 1978 Europe/Sofia, and Europe/Tallinn. This yields slightly smaller 1979 installed data files for Europe/Simferopol and Europe/Tallinn. 1980 It does not affect timestamps. (Thanks to Howard Hinnant.) 1981 1982 Changes affecting code 1983 1984 zdump and zic no longer warn about valid time zone abbreviations 1985 like '-05'. 1986 1987 Some Visual Studio 2013 warnings have been suppressed. 1988 (Thanks to Kees Dekker.) 1989 1990 'date' no longer sets the time of day and its -a, -d, -n and -t 1991 options have been removed. Long obsolescent, the implementation 1992 of these features had porting problems. Builders no longer need 1993 to configure HAVE_ADJTIME, HAVE_SETTIMEOFDAY, or HAVE_UTMPX_H. 1994 (Thanks to Kees Dekker for pointing out the problem.) 1995 1996 Changes affecting documentation 1997 1998 The Theory file mentions naming issues earlier, as these seem to be 1999 poorly publicized (thanks to Gilmore Davidson for reporting the problem). 2000 2001 tz-link.htm mentions Time Zone Database Parser (thanks to Howard Hinnant). 2002 2003 Mention that Herbert Samuel introduced the term "Summer Time". 2004 2005 2006 Release 2015e - 2015-06-13 10:56:02 -0700 2007 2008 Changes affecting future timestamps 2009 2010 Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00, 2011 not 06-13 and 07-18 as we had guessed. (Thanks to Milamber.) 2012 2013 Assume Cayman Islands will observe DST starting next year, using US rules. 2014 Although it isn't guaranteed, it is the most likely. 2015 2016 Changes affecting data format 2017 2018 The file 'iso3166.tab' now uses UTF-8, so that its entries can better 2019 spell the names of land Islands, Cte d'Ivoire, and Runion. 2020 2021 Changes affecting code 2022 2023 When displaying data, tzselect converts it to the current locale's 2024 encoding if the iconv command works. (Problem reported by random832.) 2025 2026 tzselect no longer mishandles Dominica, fixing a bug introduced 2027 in Release 2014f. (Problem reported by Owen Leibman.) 2028 2029 zic -l no longer fails when compiled with -DTZDEFAULT=\"/etc/localtime\". 2030 This fixes a bug introduced in Release 2014f. 2031 (Problem reported by Leonardo Chiquitto.) 2032 2033 2034 Release 2015d - 2015-04-24 08:09:46 -0700 2035 2036 Changes affecting future timestamps 2037 2038 Egypt will not observe DST in 2015 and will consider canceling it 2039 permanently. For now, assume no DST indefinitely. 2040 (Thanks to Ahmed Nazmy and Tim Parenti.) 2041 2042 Changes affecting past timestamps 2043 2044 America/Whitehorse switched from UT -09 to -08 on 1967-05-28, not 2045 1966-07-01. Also, Yukon's time zone history is documented better. 2046 (Thanks to Brian Inglis and Dennis Ferguson.) 2047 2048 Change affecting past and future time zone abbreviations 2049 2050 The abbreviations for Hawaii-Aleutian standard and daylight times 2051 have been changed from HAST/HADT to HST/HDT, as per US Government 2052 Printing Office style. This affects only America/Adak since 1983, 2053 as America/Honolulu was already using the new style. 2054 2055 Changes affecting code 2056 2057 zic has some minor performance improvements. 2058 2059 2060 Release 2015c - 2015-04-11 08:55:55 -0700 2061 2062 Changes affecting future timestamps 2063 2064 Egypt's spring-forward transition is at 24:00 on April's last Thursday, 2065 not 00:00 on April's last Friday. 2015's transition will therefore be on 2066 Thursday, April 30 at 24:00, not Friday, April 24 at 00:00. Similar fixes 2067 apply to 2026, 2037, 2043, etc. (Thanks to Steffen Thorsen.) 2068 2069 Changes affecting past timestamps 2070 2071 The following changes affect some pre-1991 Chile-related timestamps 2072 in America/Santiago, Antarctica/Palmer, and Pacific/Easter. 2073 2074 The 1910 transition was January 10, not January 1. 2075 2076 The 1918 transition was September 10, not September 1. 2077 2078 The UT -04 time observed from 1932 to 1942 is now considered to 2079 be standard time, not year-round DST. 2080 2081 Santiago observed DST (UT -03) from 1946-07-15 through 2082 1946-08-31, then reverted to standard time, then switched to -05 2083 on 1947-04-01. 2084 2085 Assume transitions before 1968 were at 00:00, since we have no data 2086 saying otherwise. 2087 2088 The spring 1988 transition was 1988-10-09, not 1988-10-02. 2089 The fall 1990 transition was 1990-03-11, not 1990-03-18. 2090 2091 Assume no UT offset change for Pacific/Easter on 1890-01-01, 2092 and omit all transitions on Pacific/Easter from 1942 through 1946 2093 since we have no data suggesting that they existed. 2094 2095 One more zone has been turned into a link, as it differed 2096 from an existing zone only for older timestamps. As usual, 2097 this change affects UT offsets in pre-1970 timestamps only. 2098 The zone's old contents have been moved to the 'backzone' file. 2099 The affected zone is America/Montreal. 2100 2101 Changes affecting commentary 2102 2103 Mention the TZUpdater tool. 2104 2105 Mention "The Time Now". (Thanks to Brandon Ramsey.) 2106 2107 2108 Release 2015b - 2015-03-19 23:28:11 -0700 2109 2110 Changes affecting future timestamps 2111 2112 Mongolia will start observing DST again this year, from the last 2113 Saturday in March at 02:00 to the last Saturday in September at 00:00. 2114 (Thanks to Ganbold Tsagaankhuu.) 2115 2116 Palestine will start DST on March 28, not March 27. Also, 2117 correct the fall 2014 transition from September 26 to October 24. 2118 Adjust future predictions accordingly. (Thanks to Steffen Thorsen.) 2119 2120 Changes affecting past timestamps 2121 2122 The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a 2123 regression. (Thanks to Stuart Bishop for reporting the problem.) 2124 2125 Some more zones have been turned into links, when they differed 2126 from existing zones only for older timestamps. As usual, 2127 these changes affect UT offsets in pre-1970 timestamps only. 2128 Their old contents have been moved to the 'backzone' file. 2129 The affected zones are: America/Antigua, America/Cayman, 2130 Pacific/Midway, and Pacific/Saipan. 2131 2132 Changes affecting time zone abbreviations 2133 2134 Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD". 2135 (Thanks to Hank W.) 2136 2137 Changes affecting code 2138 2139 Fix integer overflow bug in reference 'mktime' implementation. 2140 (Problem reported by Jrg Richter.) 2141 2142 Allow -Dtime_tz=time_t compilations, and allow -Dtime_tz=... libraries 2143 to be used in the same executable as standard-library time_t functions. 2144 (Problems reported by Bradley White.) 2145 2146 Changes affecting commentary 2147 2148 Cite the recent Mexican decree changing Quintana Roo's time zone. 2149 (Thanks to Carlos Ral Perasso.) 2150 2151 Likewise for the recent Chilean decree. (Thanks to Eduardo Romero Urra.) 2152 2153 Update info about Mars time. 2154 2155 2156 Release 2015a - 2015-01-29 22:35:20 -0800 2157 2158 Changes affecting future timestamps 2159 2160 The Mexican state of Quintana Roo, represented by America/Cancun, 2161 will shift from Central Time with DST to Eastern Time without DST 2162 on 2015-02-01 at 02:00. (Thanks to Steffen Thorsen and Gwillim Law.) 2163 2164 Chile will not change clocks in April or thereafter; its new standard time 2165 will be its old daylight saving time. This affects America/Santiago, 2166 Pacific/Easter, and Antarctica/Palmer. (Thanks to Juan Correa.) 2167 2168 New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49. 2169 (Thanks to Tim Parenti.) 2170 2171 Changes affecting past timestamps 2172 2173 Iceland observed DST in 1919 and 1921, and its 1939 fallback 2174 transition was Oct. 29, not Nov. 29. Remove incorrect data from 2175 Shanks about time in Iceland between 1837 and 1908. 2176 2177 Some more zones have been turned into links, when they differed 2178 from existing zones only for older timestamps. As usual, 2179 these changes affect UT offsets in pre-1970 timestamps only. 2180 Their old contents have been moved to the 'backzone' file. 2181 The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait, 2182 and Asia/Muscat. 2183 2184 Changes affecting code 2185 2186 tzalloc now scrubs time zone abbreviations compatibly with the way 2187 that tzset always has, by replacing invalid bytes with '_' and by 2188 shortening too-long abbreviations. 2189 2190 tzselect ports to POSIX awk implementations, no longer mishandles 2191 POSIX TZ settings when GNU awk is used, and reports POSIX TZ 2192 settings to the user. (Thanks to Stefan Kuhn.) 2193 2194 Changes affecting build procedure 2195 2196 'make check' now checks for links to links in the data. 2197 One such link (for Africa/Asmera) has been fixed. 2198 (Thanks to Stephen Colebourne for pointing out the problem.) 2199 2200 Changes affecting commentary 2201 2202 The leapseconds file commentary now mentions the expiration date. 2203 (Problem reported by Martin Burnicki.) 2204 2205 Update Mexican Library of Congress URL. 2206 2207 2208 Release 2014j - 2014-11-10 17:37:11 -0800 2209 2210 Changes affecting current and future timestamps 2211 2212 Turks & Caicos' switch from US eastern time to UT -04 year-round 2213 did not occur on 2014-11-02 at 02:00. It's currently scheduled 2214 for 2015-11-01 at 02:00. (Thanks to Chris Walton.) 2215 2216 Changes affecting past timestamps 2217 2218 Many pre-1989 timestamps have been corrected for Asia/Seoul and 2219 Asia/Pyongyang, based on sources for the Korean-language Wikipedia 2220 entry for time in Korea. (Thanks to Sanghyuk Jung.) Also, no 2221 longer guess that Pyongyang mimicked Seoul time after World War II, 2222 as this is politically implausible. 2223 2224 Some more zones have been turned into links, when they differed 2225 from existing zones only for older timestamps. As usual, 2226 these changes affect UT offsets in pre-1970 timestamps only. 2227 Their old contents have been moved to the 'backzone' file. 2228 The affected zones are: Africa/Addis_Ababa, Africa/Asmara, 2229 Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Kampala, 2230 Africa/Mogadishu, Indian/Antananarivo, Indian/Comoro, and 2231 Indian/Mayotte. 2232 2233 Changes affecting commentary 2234 2235 The commentary is less enthusiastic about Shanks as a source, 2236 and is more careful to distinguish UT from UTC. 2237 2238 2239 Release 2014i - 2014-10-21 22:04:57 -0700 2240 2241 Changes affecting future timestamps 2242 2243 Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00. 2244 (Thanks to Ken Rylander for the heads-up.) Guess that future 2245 years will use a similar pattern. 2246 2247 A new Zone Pacific/Bougainville, for the part of Papua New Guinea 2248 that plans to switch from UT +10 to +11 on 2014-12-28 at 02:00. 2249 (Thanks to Kiley Walbom for the heads-up.) 2250 2251 Changes affecting time zone abbreviations 2252 2253 Since Belarus is not changing its clocks even though Moscow is, 2254 the time zone abbreviation in Europe/Minsk is changing from FET 2255 to its more-traditional value MSK on 2014-10-26 at 01:00. 2256 (Thanks to Alexander Bokovoy for the heads-up about Belarus.) 2257 2258 The new abbreviation IDT stands for the pre-1976 use of UT +08 in 2259 Indochina, to distinguish it better from ICT (+07). 2260 2261 Changes affecting past timestamps 2262 2263 Many timestamps have been corrected for Asia/Ho_Chi_Minh before 1976 2264 (thanks to Trn Ngc Qun for an indirect pointer to Trn Tin Bnh's 2265 authoritative book). Asia/Ho_Chi_Minh has been added to 2266 zone1970.tab, to give tzselect users in Vietnam two choices, 2267 since north and south Vietnam disagreed after our 1970 cutoff. 2268 2269 Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as 2270 they differed from existing zones only for older timestamps. As 2271 usual, these changes affect pre-1970 timestamps only. Their old 2272 contents have been moved to the 'backzone' file. 2273 2274 Changes affecting code 2275 2276 The time-related library functions now set errno on failure, and 2277 some crashes in the new tzalloc-related library functions have 2278 been fixed. (Thanks to Christos Zoulas for reporting most of 2279 these problems and for suggesting fixes.) 2280 2281 If USG_COMPAT is defined and the requested timestamp is standard time, 2282 the tz library's localtime and mktime functions now set the extern 2283 variable timezone to a value appropriate for that timestamp; and 2284 similarly for ALTZONE, daylight saving time, and the altzone variable. 2285 This change is a companion to the tzname change in 2014h, and is 2286 designed to make timezone and altzone more compatible with tzname. 2287 2288 The tz library's functions now set errno to EOVERFLOW if they fail 2289 because the result cannot be represented. ctime and ctime_r now 2290 return NULL and set errno when a timestamp is out of range, rather 2291 than having undefined behavior. 2292 2293 Some bugs associated with the new 2014g functions have been fixed. 2294 This includes a bug that largely incapacitated the new functions 2295 time2posix_z and posix2time_z. (Thanks to Christos Zoulas.) 2296 It also includes some uses of uninitialized variables after tzalloc. 2297 The new code uses the standard type 'ssize_t', which the Makefile 2298 now gives porting advice about. 2299 2300 Changes affecting commentary 2301 2302 Updated URLs for NRC Canada (thanks to Matt Johnson and Brian Inglis). 2303 2304 2305 Release 2014h - 2014-09-25 18:59:03 -0700 2306 2307 Changes affecting past timestamps 2308 2309 America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28. 2310 2311 Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01, 2312 not 1920-01-06. The old entry was based on a misinterpretation of Shanks. 2313 2314 Some more zones have been turned into links, when they differed 2315 from existing zones only for older timestamps. As usual, 2316 these changes affect UT offsets in pre-1970 timestamps only. 2317 Their old contents have been moved to the 'backzone' file. 2318 The affected zones are: Africa/Blantyre, Africa/Bujumbura, 2319 Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi, 2320 Africa/Lusaka, Africa/Maseru, and Africa/Mbabane. 2321 2322 Changes affecting code 2323 2324 zdump -V and -v now output gmtoff= values on all platforms, 2325 not merely on platforms defining TM_GMTOFF. 2326 2327 The tz library's localtime and mktime functions now set tzname to a value 2328 appropriate for the requested timestamp, and zdump now uses this 2329 on platforms not defining TM_ZONE, fixing a 2014g regression. 2330 (Thanks to Tim Parenti for reporting the problem.) 2331 2332 The tz library no longer sets tzname if localtime or mktime fails. 2333 2334 zdump -c no longer mishandles transitions near year boundaries. 2335 (Thanks to Tim Parenti for reporting the problem.) 2336 2337 An access to uninitialized data has been fixed. 2338 (Thanks to Jrg Richter for reporting the problem.) 2339 2340 When THREAD_SAFE is defined, the code ports to the C11 memory model. 2341 A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined 2342 and two threads race to initialize data used by gmtime-like functions. 2343 (Thanks to Andy Heninger for reporting the problems.) 2344 2345 Changes affecting build procedure 2346 2347 'make check' now checks better for properly-sorted data. 2348 2349 Changes affecting documentation and commentary 2350 2351 zdump's gmtoff=N output is now documented, and its isdst=D output 2352 is now documented to possibly output D values other than 0 or 1. 2353 2354 zdump -c's treatment of years is now documented to use the 2355 Gregorian calendar and Universal Time without leap seconds, 2356 and its behavior at cutoff boundaries is now documented better. 2357 (Thanks to Arthur David Olson and Tim Parenti for reporting the problems.) 2358 2359 Programs are now documented to use the proleptic Gregorian calendar. 2360 (Thanks to Alan Barrett for the suggestion.) 2361 2362 Fractional-second GMT offsets have been documented for civil time 2363 in 19th-century Chennai, Jakarta, and New York. 2364 2365 2366 Release 2014g - 2014-08-28 12:31:23 -0700 2367 2368 Changes affecting future timestamps 2369 2370 Turks & Caicos is switching from US eastern time to UT -04 2371 year-round, modeled as a switch on 2014-11-02 at 02:00. 2372 [As noted in 2014j, this switch was later delayed.] 2373 2374 Changes affecting past timestamps 2375 2376 Time in Russia or the USSR before 1926 or so has been corrected by 2377 a few seconds in the following zones: Asia/Irkutsk, 2378 Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi, 2379 Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara. For 2380 Asia/Yekaterinburg the correction is a few minutes. (Thanks to 2381 Vladimir Karpinsky.) 2382 2383 The Portuguese decree of 1911-05-26 took effect on 1912-01-01. 2384 This affects 1911 timestamps in Africa/Bissau, Africa/Luanda, 2385 Atlantic/Azores, and Atlantic/Madeira. Also, Lisbon's pre-1912 2386 GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32. 2387 (Thanks to Stephen Colebourne for pointing to the decree.) 2388 2389 Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59. 2390 2391 A new file 'backzone' contains data which may appeal to 2392 connoisseurs of old timestamps, although it is out of scope for 2393 the tz database, is often poorly sourced, and contains some data 2394 that is known to be incorrect. The new file is not recommended 2395 for ordinary use and its entries are not installed by default. 2396 (Thanks to Lester Caine for the high-quality Jersey, Guernsey, and 2397 Isle of Man entries.) 2398 2399 Some more zones have been turned into links, when they differed 2400 from existing zones only for older timestamps. As usual, 2401 these changes affect UT offsets in pre-1970 timestamps only. 2402 Their old contents have been moved to the 'backzone' file. 2403 The affected zones are: Africa/Bangui, Africa/Brazzaville, 2404 Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda, 2405 Africa/Malabo, Africa/Niamey, and Africa/Porto-Novo. 2406 2407 Changes affecting code 2408 2409 Unless NETBSD_INSPIRED is defined to 0, the tz library now 2410 supplies functions for creating and using objects that represent 2411 timezones. The new functions are tzalloc, tzfree, localtime_rz, 2412 mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and 2413 time2posix_z. They are intended for performance: for example, 2414 localtime_rz (unlike localtime_r) is trivially thread-safe without 2415 locking. (Thanks to Christos Zoulas for proposing NetBSD-inspired 2416 functions, and to Alan Barrett and Jonathan Lennox for helping to 2417 debug the change.) 2418 2419 zdump now builds with the tz library unless USE_LTZ is defined to 0, 2420 This lets zdump use tz features even if the system library lacks them. 2421 To build zdump with the system library, use 'make CFLAGS=-DUSE_LTZ=0 2422 TZDOBJS=zdump.o CHECK_TIME_T_ALTERNATIVES='. 2423 2424 zdump now uses localtime_rz if available, as it's significantly faster, 2425 and it can help zdump better diagnose invalid timezone names. 2426 Define HAVE_LOCALTIME_RZ to 0 to suppress this. HAVE_LOCALTIME_RZ 2427 defaults to 1 if NETBSD_INSPIRED && USE_LTZ. When localtime_rz is 2428 not available, zdump now uses localtime_r and tzset if available, 2429 as this is a bit cleaner and faster than plain localtime. Compile 2430 with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system 2431 lacks these two functions. 2432 2433 If THREAD_SAFE is defined to 1, the tz library is now thread-safe. 2434 Although not needed for tz's own applications, which are single-threaded, 2435 this supports POSIX better if the tz library is used in multithreaded apps. 2436 2437 Some crashes have been fixed when zdump or the tz library is given 2438 invalid or outlandish input. 2439 2440 The tz library no longer mishandles leap seconds on platforms with 2441 unsigned time_t in timezones that lack ordinary transitions after 1970. 2442 2443 The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not 2444 already defined, to make it easier to configure on common platforms. 2445 Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this. 2446 2447 Unless the new macro UNINIT_TRAP is defined to 1, the tz code now 2448 assumes that reading uninitialized memory yields garbage values 2449 but does not cause other problems such as traps. 2450 2451 If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now 2452 more likely to guess right for ambiguous timestamps near 2453 transitions where tm_isdst does not change. 2454 2455 If HAVE_STRFTIME_L is defined to 1, the tz library now defines 2456 strftime_l for compatibility with recent versions of POSIX. 2457 Only the C locale is supported, though. HAVE_STRFTIME_L defaults 2458 to 1 on recent POSIX versions, and to 0 otherwise. 2459 2460 tzselect -c now uses a hybrid distance measure that works better 2461 in Africa. (Thanks to Alan Barrett for noting the problem.) 2462 2463 The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used, 2464 or when time_tz is defined. 2465 2466 When HAVE_UTMPX_H is set the 'date' command now builds on systems 2467 whose <utmpx.h> file does not define WTMPX_FILE, and when setting 2468 the date it updates the wtmpx file if _PATH_WTMPX is defined. 2469 This affects GNU/Linux and similar systems. 2470 2471 For easier maintenance later, some C code has been simplified, 2472 some lint has been removed, and the code has been tweaked so that 2473 plain 'make' is more likely to work. 2474 2475 The C type 'bool' is now used for boolean values, instead of 'int'. 2476 2477 The long-obsolete LOCALE_HOME code has been removed. 2478 2479 The long-obsolete 'gtime' function has been removed. 2480 2481 Changes affecting build procedure 2482 2483 'zdump' no longer links in ialloc.o, as it's not needed. 2484 2485 'make check_time_t_alternatives' no longer assumes GNU diff. 2486 2487 Changes affecting distribution tarballs 2488 2489 The files checktab.awk and zoneinfo2tdf.pl are now distributed in 2490 the tzdata tarball instead of the tzcode tarball, since they help 2491 maintain the data. The NEWS and Theory files are now also 2492 distributed in the tzdata tarball, as they're relevant for data. 2493 (Thanks to Alan Barrett for pointing this out.) Also, the 2494 leapseconds.awk file is no longer distributed in the tzcode 2495 tarball, since it belongs in the tzdata tarball (where 2014f 2496 inadvertently also distributed it). 2497 2498 Changes affecting documentation and commentary 2499 2500 A new file CONTRIBUTING is distributed. (Thanks to Tim Parenti for 2501 suggesting a CONTRIBUTING file, and to Tony Finch and Walter Harms 2502 for debugging it.) 2503 2504 The man pages have been updated to use function prototypes, 2505 to document thread-safe variants like localtime_r, and to document 2506 the NetBSD-inspired functions tzalloc, tzfree, localtime_rz, and 2507 mktime_z. 2508 2509 The fields in Link lines have been renamed to be more descriptive 2510 and more like the parameters of 'ln'. LINK-FROM has become TARGET, 2511 and LINK-TO has become LINK-NAME. 2512 2513 tz-link.htm mentions the IETF's tzdist working group; Windows 2514 Runtime etc. (thanks to Matt Johnson); and HP-UX's tztab. 2515 2516 Some broken URLs have been fixed in the commentary. (Thanks to 2517 Lester Caine.) 2518 2519 Commentary about Philippines DST has been updated, and commentary 2520 on pre-1970 time in India has been added. 2521 2522 2523 Release 2014f - 2014-08-05 17:42:36 -0700 2524 2525 Changes affecting future timestamps 2526 2527 Russia will subtract an hour from most of its time zones on 2014-10-26 2528 at 02:00 local time. (Thanks to Alexander Krivenyshev.) 2529 There are a few exceptions: Magadan Oblast (Asia/Magadan) and Zabaykalsky 2530 Krai are subtracting two hours; conversely, Chukotka Autonomous Okrug 2531 (Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka), Kemerovo Oblast 2532 (Asia/Novokuznetsk), and the Samara Oblast and the Udmurt Republic 2533 (Europe/Samara) are not changing their clocks. The changed zones are 2534 Europe/Kaliningrad, Europe/Moscow, Europe/Simferopol, Europe/Volgograd, 2535 Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk, 2536 Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Khandyga, 2537 Asia/Sakhalin, and Asia/Ust-Nera; Asia/Magadan will have two hours 2538 subtracted; and Asia/Novokuznetsk's time zone abbreviation is affected, 2539 but not its UTC offset. Two zones are added: Asia/Chita (split 2540 from Asia/Yakutsk, and also with two hours subtracted) and 2541 Asia/Srednekolymsk (split from Asia/Magadan, but with only one hour 2542 subtracted). (Thanks to Tim Parenti for much of the above.) 2543 2544 Changes affecting time zone abbreviations 2545 2546 Australian eastern time zone abbreviations are now AEST/AEDT not EST, 2547 and similarly for the other Australian zones. That is, for eastern 2548 standard and daylight saving time the abbreviations are AEST and AEDT 2549 instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT, 2550 and AWST/AWDT are now used instead of the former CST, CWST, and WST. 2551 This change does not affect UT offsets, only time zone abbreviations. 2552 (Thanks to Rich Tibbett and many others.) 2553 2554 Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07) 2555 effective 2014-10-26 at 02:00 local time. 2556 2557 The time zone abbreviation for Xinjiang Time (observed in rmqi) 2558 has been changed from URUT to XJT. (Thanks to Luther Ma.) 2559 2560 Prefer MSK/MSD for Moscow time in Russia, even in other cities. 2561 Similarly, prefer EET/EEST for eastern European time in Russia. 2562 2563 Change time zone abbreviations in (western) Samoa to use "ST" and 2564 "DT" suffixes, as this is more likely to match common practice. 2565 Prefix "W" to (western) Samoa time when its standard-time offset 2566 disagrees with that of American Samoa. 2567 2568 America/Metlakatla now uses PST, not MeST, to abbreviate its time zone. 2569 2570 Time zone abbreviations have been updated for Japan's two time 2571 zones used 1896-1937. JWST now stands for Western Standard 2572 Time, and JCST for Central Standard Time (formerly this was CJT). 2573 These abbreviations are now used for time in Korea, Taiwan, 2574 and Sakhalin while controlled by Japan. 2575 2576 Changes affecting past timestamps 2577 2578 China's five zones have been simplified to two, since the post-1970 2579 differences in the other three seem to have been imaginary. The 2580 zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been 2581 removed; backwards-compatibility links still work, albeit with 2582 different behaviors for timestamps before May 1980. Asia/Urumqi's 2583 1980 transition to UT +08 has been removed, so that it is now at 2584 +06 and not +08. (Thanks to Luther Ma and to Alois Treindl; 2585 Treindl sent helpful translations of two papers by Guo Qingsheng.) 2586 2587 Some zones have been turned into links, when they differed from existing 2588 zones only for older UT offsets where data entries were likely invented. 2589 These changes affect UT offsets in pre-1970 timestamps only. This is 2590 similar to the change in release 2013e, except this time for western 2591 Africa. The affected zones are: Africa/Bamako, Africa/Banjul, 2592 Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome, 2593 Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, and 2594 Atlantic/St_Helena. This also affects the backwards-compatibility 2595 link Africa/Timbuktu. (Thanks to Alan Barrett, Stephen Colebourne, 2596 Tim Parenti, and David Patte for reporting problems in earlier 2597 versions of this change.) 2598 2599 Asia/Shanghai's pre-standard-time UT offset has been changed from 2600 8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its 2601 transition to standard time has been changed from 1928 to 1901. 2602 2603 Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01, 2604 then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945. 2605 In 1946 it observed DST from 05-15 through 09-30; in 1947 2606 from 04-15 through 10-31; and in 1979 from 07-01 through 09-30. 2607 (Thanks to Yu-Cheng Chuang.) 2608 2609 Asia/Riyadh's transition to standard time is now 1947-03-14, not 1950. 2610 2611 Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not 2612 10-03 at 00:00. (Thanks to Konstantin Hyppnen.) 2613 2614 Pacific/Pago_Pago has been changed from UT -11:30 to -11 for the 2615 period from 1911 to 1950. 2616 2617 Pacific/Chatham has been changed to New Zealand standard time plus 2618 45 minutes for the period before 1957, reflecting a 1956 remark in 2619 the New Zealand parliament. 2620 2621 Europe/Budapest has several pre-1946 corrections: in 1918 the transition 2622 out of DST was on 09-16, not 09-29; in 1919 it was on 11-24, not 09-15; in 2623 1945 it was on 11-01, not 11-03; in 1941 the transition to DST was 04-08 2624 not 04-06 at 02:00; and there was no DST in 1920. 2625 2626 Africa/Accra is now assumed to have observed DST from 1920 through 1935. 2627 2628 Time in Russia before 1927 or so has been corrected by a few seconds in 2629 the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi, 2630 Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg, Europe/Helsinki, and 2631 Europe/Riga. Also, Moscow's location has been changed to its Kilometer 0 2632 point. (Thanks to Vladimir Karpinsky for the Moscow changes.) 2633 2634 Changes affecting data format 2635 2636 A new file 'zone1970.tab' supersedes 'zone.tab' in the installed data. 2637 The new file's extended format allows multiple country codes per zone. 2638 The older file is still installed but is deprecated; its format is 2639 not changing and it will still be distributed for a while, but new 2640 applications should use the new file. 2641 2642 The new file format simplifies maintenance of obscure locations. 2643 To test this, it adds coverage for the Crozet Islands and the 2644 Scattered Islands. (Thanks to Tobias Conradi and Antoine Leca.) 2645 2646 The file 'iso3166.tab' is planned to switch from ASCII to UTF-8. 2647 It is still ASCII now, but commentary about the switch has been added. 2648 The new file 'zone1970.tab' already uses UTF-8. 2649 2650 Changes affecting code 2651 2652 'localtime', 'mktime', etc. now use much less stack space if ALL_STATE 2653 is defined. (Thanks to Elliott Hughes for reporting the problem.) 2654 2655 'zic' no longer mishandles input when ignoring case in locales that 2656 are not compatible with English, e.g., unibyte Turkish locales when 2657 compiled with HAVE_GETTEXT. 2658 2659 Error diagnostics of 'zic' and 'yearistype' have been reworded so that 2660 they no longer use ASCII '-' as if it were a dash. 2661 2662 'zic' now rejects output file names that contain '.' or '..' components. 2663 (Thanks to Tim Parenti for reporting the problem.) 2664 2665 'zic -v' now warns about output file names that do not follow 2666 POSIX rules, or that contain a digit or '.'. (Thanks to Arthur 2667 David Olson for starting the ball rolling on this.) 2668 2669 Some lint has been removed when using GCC_DEBUG_FLAGS with GCC 4.9.0. 2670 2671 Changes affecting build procedure 2672 2673 'zic' no longer links in localtime.o and asctime.o, as they're not needed. 2674 (Thanks to John Cochran.) 2675 2676 Changes affecting documentation and commentary 2677 2678 The 'Theory' file documents legacy names, the longstanding 2679 exceptions to the POSIX-inspired file name rules. 2680 2681 The 'zic' documentation clarifies the role of time types when 2682 interpreting dates. (Thanks to Arthur David Olson.) 2683 2684 Documentation and commentary now prefer UTF-8 to US-ASCII, 2685 allowing the use of proper accents in foreign words and names. 2686 Code and data have not changed because of this. (Thanks to 2687 Garrett Wollman, Ian Abbott, and Guy Harris for helping to debug 2688 this.) 2689 2690 Non-HTML documentation and commentary now use plain-text URLs instead of 2691 HTML insertions, and are more consistent about bracketing URLs when they 2692 are not already surrounded by white space. (Thanks to suggestions by 2693 Steffen Nurpmeso.) 2694 2695 There is new commentary about Xujiahui Observatory, the five time-zone 2696 project in China from 1918 to 1949, timekeeping in Japanese-occupied 2697 Shanghai, and Tibet Time in the 1950s. The sharp-eyed can spot the 2698 warlord Jin Shuren in the data. 2699 2700 Commentary about the coverage of each Russian zone has been standardized. 2701 (Thanks to Tim Parenti.) 2702 2703 There is new commentary about contemporary timekeeping in Ethiopia. 2704 2705 Obsolete comments about a 2007 proposal for DST in Kuwait has been removed. 2706 2707 There is new commentary about time in Poland in 1919. 2708 2709 Proper credit has been given to DST inventor George Vernon Hudson. 2710 2711 Commentary about time in Metlakatla, AK and Resolute, NU has been 2712 improved, with a new source for the former. 2713 2714 In zone.tab, Pacific/Easter no longer mentions Salas y Gmez, as it 2715 is uninhabited. 2716 2717 Commentary about permanent Antarctic bases has been updated. 2718 2719 Several typos have been corrected. (Thanks to Tim Parenti for 2720 contributing some of these fixes.) 2721 2722 tz-link.htm now mentions the JavaScript libraries Moment Timezone, 2723 TimezoneJS.Date, Walltime-js, and Timezone. (Thanks to a heads-up 2724 from Matt Johnson.) Also, it mentions the Go 'latlong' package. 2725 (Thanks to a heads-up from Dirkjan Ochtman.) 2726 2727 The files usno1988, usno1989, usno1989a, usno1995, usno1997, and usno1998 2728 have been removed. These obsolescent US Naval Observatory entries were no 2729 longer helpful for maintenance. (Thanks to Tim Parenti for the suggestion.) 2730 2731 2732 Release 2014e - 2014-06-12 21:53:52 -0700 2733 2734 Changes affecting near-future timestamps 2735 2736 Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00. 2737 (Thanks to Imed Chihi.) Guess that from 2015 on Egypt will temporarily 2738 switch to standard time at 24:00 the last Thursday before Ramadan, and 2739 back to DST at 00:00 the first Friday after Ramadan. 2740 2741 Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00. (Thanks 2742 to Milamber Space Network.) Guess that from 2015 on Morocco will 2743 temporarily switch to standard time at 03:00 the last Saturday before 2744 Ramadan, and back to DST at 02:00 the first Saturday after Ramadan. 2745 2746 Changes affecting past timestamps 2747 2748 The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of 2749 "MSD" for Moscow's double daylight time in summer 1921. Also, a typo 2750 "VLASST" has been repaired to be "VLAST" for Vladivostok summer time 2751 in 1991. (Thanks to Hank W. for reporting the problems.) 2752 2753 Changes affecting commentary 2754 2755 tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the 2756 draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and 2757 removes stale pointers to World Time Explorer and WORLDTIME. 2758 2759 2760 Release 2014d - 2014-05-27 21:34:40 -0700 2761 2762 Changes affecting code 2763 2764 zic no longer generates files containing timestamps before the Big Bang. 2765 This works around GNOME glib bug 878 2766 <https://gitlab.gnome.org/GNOME/glib/issues/878> 2767 (Thanks to Leonardo Chiquitto for reporting the bug, and to 2768 Arthur David Olson and James Cloos for suggesting improvements to the fix.) 2769 2770 Changes affecting documentation 2771 2772 tz-link.htm now mentions GNOME. 2773 2774 2775 Release 2014c - 2014-05-13 07:44:13 -0700 2776 2777 Changes affecting near-future timestamps 2778 2779 Egypt observes DST starting 2014-05-15 at 24:00. 2780 (Thanks to Ahmad El-Dardiry and Gunther Vermier.) 2781 Details have not been announced, except that DST will not be observed 2782 during Ramadan. Guess that DST will stop during the same Ramadan dates as 2783 Morocco, and that Egypt's future spring and fall transitions will be the 2784 same as 2010 when it last observed DST, namely April's last Friday at 2785 00:00 to September's last Thursday at 23:00 standard time. Also, guess 2786 that Ramadan transitions will be at 00:00 standard time. 2787 2788 Changes affecting code 2789 2790 zic now generates transitions for minimum time values, eliminating guesswork 2791 when handling low-valued timestamps. (Thanks to Arthur David Olson.) 2792 2793 Port to Cygwin sans glibc. (Thanks to Arthur David Olson.) 2794 2795 Changes affecting commentary and documentation 2796 2797 Remove now-confusing comment about Jordan. (Thanks to Oleksii Nochovnyi.) 2798 2799 2800 Release 2014b - 2014-03-24 21:28:50 -0700 2801 2802 Changes affecting near-future timestamps 2803 2804 Crimea switches to Moscow time on 2014-03-30 at 02:00 local time. 2805 (Thanks to Alexander Krivenyshev.) Move its zone.tab entry from UA to RU. 2806 2807 New entry for Troll station, Antarctica. (Thanks to Paul-Inge Flakstad and 2808 Bengt-Inge Larsson.) This is currently an approximation; a better version 2809 will require the zic and localtime fixes mentioned below, and the plan is 2810 to wait for a while until at least the zic fixes propagate. 2811 2812 Changes affecting code 2813 2814 'zic' and 'localtime' no longer reject locations needing four transitions 2815 per year for the foreseeable future. (Thanks to Andrew Main (Zefram).) 2816 Also, 'zic' avoids some unlikely failures due to integer overflow. 2817 2818 Changes affecting build procedure 2819 2820 'make check' now detects Rule lines defined but never used. 2821 The NZAQ rules, an instance of this problem, have been removed. 2822 2823 Changes affecting commentary and documentation 2824 2825 Fix Tuesday/Thursday typo in description of time in Israel. 2826 (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.) 2827 2828 Microsoft Windows 8.1 doesn't support tz database names. (Thanks 2829 to Donald MacQueen.) Instead, the Microsoft Windows Store app 2830 library supports them. 2831 2832 Add comments about Johnston Island time in the 1960s. 2833 (Thanks to Lyle McElhaney.) 2834 2835 Morocco's 2014 DST start will be as predicted. 2836 (Thanks to Sebastien Willemijns.) 2837 2838 2839 Release 2014a - 2014-03-07 23:30:29 -0800 2840 2841 Changes affecting near-future timestamps 2842 2843 Turkey begins DST on 2014-03-31, not 03-30. (Thanks to Faruk Pasin for 2844 the heads-up, and to Tim Parenti for simplifying the update.) 2845 2846 Changes affecting past timestamps 2847 2848 Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00. 2849 (Thanks to Steffen Thorsen.) 2850 2851 Ukraine switched from Moscow to Eastern European time on 1990-07-01 2852 (not 1992-01-01), and observed DST during the entire next winter. 2853 (Thanks to Vladimir in Moscow via Alois Treindl.) 2854 2855 In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03. 2856 (Thanks to Avigdor Finkelstein.) 2857 2858 Changes affecting code 2859 2860 A uninitialized-storage bug in 'localtime' has been fixed. 2861 (Thanks to Logan Chien.) 2862 2863 Changes affecting the build procedure 2864 2865 The settings for 'make check_web' now default to Ubuntu 13.10. 2866 2867 Changes affecting commentary and documentation 2868 2869 The boundary of the US Pacific time zone is given more accurately. 2870 (Thanks to Alan Mintz.) 2871 2872 Chile's 2014 DST will be as predicted. (Thanks to Jos Miguel Garrido.) 2873 2874 Paraguay's 2014 DST will be as predicted. (Thanks to Carlos Ral Perasso.) 2875 2876 Better descriptions of countries with same time zone history as 2877 Trinidad and Tobago since 1970. (Thanks to Alan Barrett for suggestion.) 2878 2879 Several changes affect tz-link.htm, the main web page. 2880 2881 Mention Time.is (thanks to Even Scharning) and WX-now (thanks to 2882 David Braverman). 2883 2884 Mention xCal (Internet RFC 6321) and jCal. 2885 2886 Microsoft has some support for tz database names. 2887 2888 CLDR data formats include both XML and JSON. 2889 2890 Mention Maggiolo's map of solar vs standard time. 2891 (Thanks to Arthur David Olson.) 2892 2893 Mention TZ4Net. (Thanks to Matt Johnson.) 2894 2895 Mention the timezone-olson Haskell package. 2896 2897 Mention zeitverschiebung.net. (Thanks to Martin Jger.) 2898 2899 Remove moribund links to daylight-savings-time.info and to 2900 Simple Timer + Clocks. 2901 2902 Update two links. (Thanks to Oscar van Vlijmen.) 2903 2904 Fix some formatting glitches, e.g., remove random newlines from 2905 abbr elements' title attributes. 2906 2907 2908 Release 2013i - 2013-12-17 07:25:23 -0800 2909 2910 Changes affecting near-future timestamps: 2911 2912 Jordan switches back to standard time at 00:00 on December 20, 2013. 2913 The 2006-2011 transition schedule is planned to resume in 2014. 2914 (Thanks to Steffen Thorsen.) 2915 2916 Changes affecting past timestamps: 2917 2918 In 2004, Cuba began DST on March 28, not April 4. 2919 (Thanks to Steffen Thorsen.) 2920 2921 Changes affecting code 2922 2923 The compile-time flag NOSOLAR has been removed, as nowadays the 2924 benefit of slightly shrinking runtime table size is outweighed by the 2925 cost of disallowing potential future updates that exceed old limits. 2926 2927 Changes affecting documentation and commentary 2928 2929 The files solar87, solar88, and solar89 are no longer distributed. 2930 They were a negative experiment - that is, a demonstration that 2931 tz data can represent solar time only with some difficulty and error. 2932 Their presence in the distribution caused confusion, as Riyadh 2933 civil time was generally not solar time in those years. 2934 2935 tz-link.htm now mentions Noda Time. (Thanks to Matt Johnson.) 2936 2937 2938 Release 2013h - 2013-10-25 15:32:32 -0700 2939 2940 Changes affecting current and future timestamps: 2941 2942 Libya has switched its UT offset back to +02 without DST, instead 2943 of +01 with DST. (Thanks to Even Scharning.) 2944 2945 Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules. 2946 (Thanks to Gwillim Law.) 2947 2948 Changes affecting future timestamps: 2949 2950 Acre and (we guess) western Amazonas will switch from UT -04 to -05 2951 on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe. 2952 (Thanks to Steffen Thorsen.) 2953 2954 Add entries for DST transitions in Morocco in the year 2038. 2955 This avoids some year-2038 glitches introduced in 2013g. 2956 (Thanks to Yoshito Umaoka for reporting the problem.) 2957 2958 Changes affecting API 2959 2960 The 'tzselect' command no longer requires the 'select' command, 2961 and should now work with /bin/sh on more platforms. It also works 2962 around a bug in BusyBox awk before version 1.21.0. (Thanks to 2963 Patrick 'P. J.' McDermott and Alan Barrett.) 2964 2965 Changes affecting code 2966 2967 Fix localtime overflow bugs with 32-bit unsigned time_t. 2968 2969 zdump no longer assumes sscanf returns maximal values on overflow. 2970 2971 Changes affecting the build procedure 2972 2973 The builder can specify which programs to use, if any, instead of 2974 'ar' and 'ranlib', and libtz.a is now built locally before being 2975 installed. (Thanks to Michael Forney.) 2976 2977 A dependency typo in the 'zdump' rule has been fixed. 2978 (Thanks to Andrew Paprocki.) 2979 2980 The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f' 2981 work as specified by POSIX.2-1992 or later; this is portable nowadays. 2982 2983 'make clean' no longer removes 'leapseconds', since it's 2984 host-independent and is part of the distribution. 2985 2986 The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed. 2987 2988 Changes affecting documentation and commentary 2989 2990 tz-link.htm now mentions TC TIMEZONE's draft time zone service protocol 2991 (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle). 2992 2993 Update URLs in tz-link page. Add URLs for Microsoft Windows, since 2994 8.1 introduces tz support. Remove URLs for Tru64 and UnixWare (no 2995 longer maintained) and for old advisories. SOFA now does C. 2996 2997 Release 2013g - 2013-09-30 21:08:26 -0700 2998 2999 Changes affecting current and near-future timestamps 3000 3001 Morocco now observes DST from the last Sunday in March to the last 3002 Sunday in October, not April to September respectively. (Thanks 3003 to Steffen Thorsen.) 3004 3005 Changes affecting 'zic' 3006 3007 'zic' now runs on platforms that lack both hard links and symlinks. 3008 (Thanks to Theo Veenker for reporting the problem, for MinGW.) 3009 Also, fix some bugs on platforms that lack hard links but have symlinks. 3010 3011 'zic -v' again warns that Asia/Tehran has no POSIX environment variable 3012 to predict the far future, fixing a bug introduced in 2013e. 3013 3014 Changes affecting the build procedure 3015 3016 The 'leapseconds' file is again put into the tzdata tarball. 3017 Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to 3018 Matt Burgess and Ian Abbott.) The timestamps of these and other 3019 dependent files in tarballs are adjusted more consistently. 3020 3021 Changes affecting documentation and commentary 3022 3023 The README file is now part of the data tarball as well as the code. 3024 It now states that files are public domain unless otherwise specified. 3025 (Thanks to Andrew Main (Zefram) for asking for clarifications.) 3026 Its details about the 1989 release moved to a place of honor near 3027 the end of NEWS. 3028 3029 3030 Release 2013f - 2013-09-24 23:37:36 -0700 3031 3032 Changes affecting near-future timestamps 3033 3034 Tocantins will very likely not observe DST starting this spring. 3035 (Thanks to Steffen Thorsen.) 3036 3037 Jordan will likely stay at UT +03 indefinitely, and will not fall 3038 back this fall. 3039 3040 Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.) 3041 3042 Changes affecting API 3043 3044 The types of the global variables 'timezone' and 'altzone' (if present) 3045 have been changed back to 'long'. This is required for 'timezone' 3046 by POSIX, and for 'altzone' by common practice, e.g., Solaris 11. 3047 These variables were originally 'long' in the tz code, but were 3048 mistakenly changed to 'time_t' in 1987; nobody reported the 3049 incompatibility until now. The difference matters on x32, where 3050 'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.) 3051 3052 Changes affecting the build procedure 3053 3054 Avoid long strings in leapseconds.awk to work around a mawk bug. 3055 (Thanks to Cyril Baurand.) 3056 3057 Changes affecting documentation and commentary 3058 3059 New file 'NEWS' that contains release notes like this one. 3060 3061 Paraguay's law does not specify DST transition time; 00:00 is customary. 3062 (Thanks to Waldemar Villamayor-Venialbo.) 3063 3064 Minor capitalization fixes. 3065 3066 Changes affecting version-control only 3067 3068 The experimental GitHub repository now contains annotated and 3069 signed tags for recent releases, e.g., '2013e' for Release 2013e. 3070 Releases are tagged starting with 2012e; earlier releases were 3071 done differently, and tags would either not have a simple name or 3072 not exactly match what was released. 3073 3074 'make set-timestamps' is now simpler and a bit more portable. 3075 3076 3077 Release 2013e - 2013-09-19 23:50:04 -0700 3078 3079 Changes affecting near-future timestamps 3080 3081 This year Fiji will start DST on October 27, not October 20. 3082 (Thanks to David Wheeler for the heads-up.) For now, guess that 3083 Fiji will continue to spring forward the Sunday before the fourth 3084 Monday in October. 3085 3086 Changes affecting current and future time zone abbreviations 3087 3088 Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian 3089 time zone abbreviations since 1932. (Thanks to George Ziegler, 3090 Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and 3091 Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura, 3092 Asia/Makassar, and Asia/Pontianak. 3093 3094 Use ART (UT -03, standard time), rather than WARST (also -03, but 3095 daylight saving time) for San Luis, Argentina since 2009. 3096 3097 Changes affecting Godthb timestamps after 2037 if version mismatch 3098 3099 Allow POSIX-like TZ strings where the transition time's hour can 3100 range from -167 through 167, instead of the POSIX-required 0 3101 through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the 3102 new Fiji rules. This is a more-compact way to represent 3103 far-future timestamps for America/Godthab, America/Santiago, 3104 Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem, 3105 Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by 3106 this change. (Derived from a suggestion by Arthur David Olson.) 3107 3108 Allow POSIX-like TZ strings where daylight saving time is in 3109 effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western 3110 Argentina Summer Time all year. This supports a more-compact way 3111 to represent the 2013d data for America/Argentina/San_Luis. 3112 Because of the change for San Luis noted above this change does not 3113 affect the current data. (Thanks to Andrew Main (Zefram) for 3114 suggestions that improved this change.) 3115 3116 Where these two TZ changes take effect, there is a minor extension 3117 to the tz file format in that it allows new values for the 3118 embedded TZ-format string, and the tz file format version number 3119 has therefore been increased from 2 to 3 as a precaution. 3120 Version-2-based client code should continue to work as before for 3121 all timestamps before 2038. Existing version-2-based client code 3122 (tzcode, GNU/Linux, Solaris) has been tested on version-3-format 3123 files, and typically works in practice even for timestamps after 3124 2037; the only known exception is America/Godthab. 3125 3126 Changes affecting timestamps before 1970 3127 3128 Pacific/Johnston is now a link to Pacific/Honolulu. This corrects 3129 some errors before 1947. 3130 3131 Some zones have been turned into links, when they differ from existing 3132 zones only in older data entries that were likely invented or that 3133 differ only in LMT or transitions from LMT. These changes affect 3134 only timestamps before 1943. The affected zones are: 3135 Africa/Juba, America/Anguilla, America/Aruba, America/Dominica, 3136 America/Grenada, America/Guadeloupe, America/Marigot, 3137 America/Montserrat, America/St_Barthelemy, America/St_Kitts, 3138 America/St_Lucia, America/St_Thomas, America/St_Vincent, 3139 America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for 3140 confirming that the old Europe/Vaduz zone was wrong and the new 3141 link is better for WWII-era times.) 3142 3143 Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects 3144 America/Cayman, America/Jamaica and America/Grand_Turk timestamps 3145 from 1890 to 1912. 3146 3147 Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46. 3148 This affects Europe/Zurich timestamps from 1853 to 1894. (Thanks 3149 to Alois Treindl.) 3150 3151 Change the date of the circa-1850 Zurich transition from 1849-09-12 3152 to 1853-07-16, overriding Shanks with data from Messerli about 3153 postal and telegraph time in Switzerland. 3154 3155 Changes affecting time zone abbreviations before 1970 3156 3157 For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932, 3158 as Jakarta was called Batavia back then. 3159 3160 Changes affecting API 3161 3162 The 'zic' command now outputs a dummy transition when far-future 3163 data can't be summarized using a TZ string, and uses a 402-year 3164 window rather than a 400-year window. For the current data, this 3165 affects only the Asia/Tehran file. It does not affect any of the 3166 timestamps that this file represents, so zdump outputs the same 3167 information as before. (Thanks to Andrew Main (Zefram).) 3168 3169 The 'date' command has a new '-r' option, which lets you specify 3170 the integer time to display, a la FreeBSD. 3171 3172 The 'tzselect' command has two new options '-c' and '-n', which lets you 3173 select a zone based on latitude and longitude. 3174 3175 The 'zic' command's '-v' option now warns about constructs that 3176 require the new version-3 binary file format. (Thanks to Arthur 3177 David Olson for the suggestion.) 3178 3179 Support for floating-point time_t has been removed. 3180 It was always dicey, and POSIX no longer requires it. 3181 (Thanks to Eric Blake for suggesting to the POSIX committee to 3182 remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy 3183 Heninger, Arthur David Olson, and Alois Treindl, for reporting 3184 bugs and elucidating some of the corners of the old floating-point 3185 implementation.) 3186 3187 The signatures of 'offtime', 'timeoff', and 'gtime' have been 3188 changed back to the old practice of using 'long' to represent UT 3189 offsets. This had been inadvertently and mistakenly changed to 3190 'int_fast32_t'. (Thanks to Christos Zoulas.) 3191 3192 The code avoids undefined behavior on integer overflow in some 3193 more places, including gmtime, localtime, mktime and zdump. 3194 3195 Changes affecting the zdump utility 3196 3197 zdump now outputs "UT" when referring to Universal Time, not "UTC". 3198 "UTC" does not make sense for timestamps that predate the introduction 3199 of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen 3200 for clarifying UT vs UTC.) 3201 3202 Data changes affecting behavior of tzselect and similar programs 3203 3204 Country code BQ is now called the more-common name "Caribbean Netherlands" 3205 rather than the more-official "Bonaire, St Eustatius & Saba". 3206 3207 Remove from zone.tab the names America/Montreal, America/Shiprock, 3208 and Antarctica/South_Pole, as they are equivalent to existing 3209 same-country-code zones for post-1970 timestamps. The data entries for 3210 these names are unchanged, so the names continue to work as before. 3211 3212 Changes affecting code internals 3213 3214 zic -c now runs way faster on 64-bit hosts when given large numbers. 3215 3216 zic now uses vfprintf to avoid allocating and freeing some memory. 3217 3218 tzselect now computes the list of continents from the data, 3219 rather than have it hard-coded. 3220 3221 Minor changes pacify GCC 4.7.3 and GCC 4.8.1. 3222 3223 Changes affecting the build procedure 3224 3225 The 'leapseconds' file is now generated automatically from a 3226 new file 'leap-seconds.list', which is a copy of 3227 <ftp://ftp.nist.gov/pub/time/leap-seconds.list> 3228 A new source file 'leapseconds.awk' implements this. 3229 The goal is simplification of the future maintenance of 'leapseconds'. 3230 3231 When building the 'posix' or 'right' subdirectories, if the 3232 subdirectory would be a copy of the default subdirectory, it is 3233 now made a symbolic link if that is supported. This saves about 3234 2 MB of file system space. 3235 3236 The links America/Shiprock and Antarctica/South_Pole have been 3237 moved to the 'backward' file. This affects only nondefault builds 3238 that omit 'backward'. 3239 3240 Changes affecting version-control only 3241 3242 .gitignore now ignores 'date'. 3243 3244 Changes affecting documentation and commentary 3245 3246 Changes to the 'tzfile' man page 3247 3248 It now mentions that the binary file format may be extended in 3249 future versions by appending data. 3250 3251 It now refers to the 'zdump' and 'zic' man pages. 3252 3253 Changes to the 'zic' man page 3254 3255 It lists conditions that elicit a warning with '-v'. 3256 3257 It says that the behavior is unspecified when duplicate names 3258 are given, or if the source of one link is the target of another. 3259 3260 Its examples are updated to match the latest data. 3261 3262 The definition of white space has been clarified slightly. 3263 (Thanks to Michael Deckers.) 3264 3265 Changes to the 'Theory' file 3266 3267 There is a new section about the accuracy of the tz database, 3268 describing the many ways that errors can creep in, and 3269 explaining why so many of the pre-1970 timestamps are wrong or 3270 misleading (thanks to Steve Allen, Lester Caine, and Garrett 3271 Wollman for discussions that contributed to this). 3272 3273 The 'Theory' file describes LMT better (this follows a 3274 suggestion by Guy Harris). 3275 3276 It refers to the 2013 edition of POSIX rather than the 2004 edition. 3277 3278 It's mentioned that excluding 'backward' should not affect the 3279 other data, and it suggests at least one zone.tab name per 3280 inhabited country (thanks to Stephen Colebourne). 3281 3282 Some longstanding restrictions on names are documented, e.g., 3283 'America/New_York' precludes 'America/New_York/Bronx'. 3284 3285 It gives more reasons for the 1970 cutoff. 3286 3287 It now mentions which time_t variants are supported, such as 3288 signed integer time_t. (Thanks to Paul Goyette for reporting 3289 typos in an experimental version of this change.) 3290 3291 (Thanks to Philip Newton for correcting typos in these changes.) 3292 3293 Documentation and commentary is more careful to distinguish UT in 3294 general from UTC in particular. (Thanks to Steve Allen.) 3295 3296 Add a better source for the Zurich 1894 transition. 3297 (Thanks to Pierre-Yves Berger.) 3298 3299 Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.) 3300 3301 3302 Release 2013d - 2013-07-05 07:38:01 -0700 3303 3304 Changes affecting future timestamps: 3305 3306 Morocco's midsummer transitions this year are July 7 and August 10, 3307 not July 9 and August 8. (Thanks to Andrew Paprocki.) 3308 3309 Israel now falls back on the last Sunday of October. 3310 (Thanks to Ephraim Silverberg.) 3311 3312 Changes affecting past timestamps: 3313 3314 Specify Jerusalem's location more precisely; this changes the pre-1880 3315 times by 2 s. 3316 3317 Changing affecting metadata only: 3318 3319 Fix typos in the entries for country codes BQ and SX. 3320 3321 Changes affecting code: 3322 3323 Rework the code to fix a bug with handling Australia/Macquarie on 3324 32-bit hosts (thanks to Arthur David Olson). 3325 3326 Port to platforms like NetBSD, where time_t can be wider than long. 3327 3328 Add support for testing time_t types other than the system's. 3329 Run 'make check_time_t_alternatives' to try this out. 3330 Currently, the tests fail for unsigned time_t; 3331 this should get fixed at some point. 3332 3333 Changes affecting documentation and commentary: 3334 3335 Deemphasize the significance of national borders. 3336 3337 Update the zdump man page. 3338 3339 Remove obsolete NOID comment (thanks to Denis Excoffier). 3340 3341 Update several URLs and comments in the web pages. 3342 3343 Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler). 3344 3345 Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka). 3346 3347 3348 Release 2013c - 2013-04-19 16:17:40 -0700 3349 3350 Changes affecting current and future timestamps: 3351 3352 Palestine observed DST starting March 29, 2013. (Thanks to 3353 Steffen Thorsen.) From 2013 on, Gaza and Hebron both observe DST, 3354 with the predicted rules being the last Thursday in March at 24:00 3355 to the first Friday on or after September 21 at 01:00. 3356 3357 Assume that the recent change to Paraguay's DST rules is permanent, 3358 by moving the end of DST to the 4th Sunday in March every year. 3359 (Thanks to Carlos Ral Perasso.) 3360 3361 Changes affecting past timestamps: 3362 3363 Fix some historical data for Palestine to agree with that of 3364 timeanddate.com, as follows: 3365 3366 The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not 3367 00:00 Apr 1. 3368 3369 The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not 3370 02:00. 3371 3372 The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27. 3373 3374 The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2. 3375 3376 The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01. 3377 3378 The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00. 3379 3380 Fix times of habitation for Macquarie to agree with the Tasmania 3381 Parks & Wildlife Service history, which indicates that permanent 3382 habitation was 1899-1919 and 1948 on. 3383 3384 Changing affecting metadata only: 3385 3386 Macquarie Island is politically part of Australia, not Antarctica. 3387 (Thanks to Tobias Conradi.) 3388 3389 Sort Macquarie more-consistently with other parts of Australia. 3390 (Thanks to Tim Parenti.) 3391 3392 3393 Release 2013b - 2013-03-10 22:33:40 -0700 3394 3395 Changes affecting current and future timestamps: 3396 3397 Haiti uses US daylight-saving rules this year, and presumably future years. 3398 This changes timestamps starting today. (Thanks to Steffen Thorsen.) 3399 3400 Paraguay will end DST on March 24 this year. 3401 (Thanks to Steffen Thorsen.) For now, assume it's just this year. 3402 3403 Morocco does not observe DST during Ramadan; 3404 try to predict Ramadan in Morocco as best we can. 3405 (Thanks to Erik Homoet for the heads-up.) 3406 3407 Changes affecting commentary: 3408 3409 Update URLs in tz-link page. Add URLs for webOS, BB10, iOS. 3410 Update URL for Solaris. Mention Internet RFC 6557. 3411 Update Internet RFCs 2445->5545, 2822->5322. 3412 Switch from FTP to HTTP for Internet RFCs. 3413 3414 3415 Release 2013a - 2013-02-27 09:20:35 -0800 3416 3417 Change affecting binary data format: 3418 3419 The zone offset at the end of version-2-format zone files is now 3420 allowed to be 24:00, as per POSIX.1-2008. (Thanks to Arthur David Olson.) 3421 3422 Changes affecting current and future timestamps: 3423 3424 Chile's 2013 rules, and we guess rules for 2014 and later, will be 3425 the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC. 3426 (Thanks to Steffen Thorsen and Robert Elz.) 3427 3428 New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen. 3429 (Thanks to Tobias Conradi and Arthur David Olson.) 3430 3431 Many changes affect historical timestamps before 1940. 3432 These were deduced from: Milne J. Civil time. Geogr J. 1899 3433 Feb;13(2):173-94 <https://www.jstor.org/stable/1774359>. 3434 3435 Changes affecting the code: 3436 3437 Fix zic bug that mishandled Egypt's 2010 changes (this also affected 3438 the data). (Thanks to Arthur David Olson.) 3439 3440 Fix localtime bug when time_t is unsigned and data files were generated 3441 by a signed time_t system. (Thanks to Doug Bailey for reporting and 3442 to Arthur David Olson for fixing.) 3443 3444 Allow the email address for bug reports to be set by the packager. 3445 The default is tz (a] iana.org, as before. (Thanks to Joseph S. Myers.) 3446 3447 Update HTML checking to be compatible with Ubuntu 12.10. 3448 3449 Check that files are a safe subset of ASCII. At some point we may 3450 relax this requirement to a safe subset of UTF-8. Without the 3451 check, some non-UTF-8 encodings were leaking into the distribution. 3452 3453 Commentary changes: 3454 3455 Restore a comment about copyright notices that was inadvertently deleted. 3456 (Thanks to Arthur David Olson.) 3457 3458 Improve the commentary about which districts observe what times 3459 in Russia. (Thanks to Oscar van Vlijmen and Arthur David Olson.) 3460 3461 Add web page links to tz.js. 3462 3463 Add "Run by the Monkeys" to tz-art. (Thanks to Arthur David Olson.) 3464 3465 3466 Release 2012j - 2012-11-12 18:34:49 -0800 3467 3468 Libya moved to CET this weekend, but with DST planned next year. 3469 (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.) 3470 3471 Signatures now have the extension .asc, not .sign, as that's more 3472 standard. (Thanks to Phil Pennock.) 3473 3474 The output of 'zdump --version', and of 'zic --version', now 3475 uses a format that is more typical for --version. 3476 (Thanks to Joseph S. Myers.) 3477 3478 The output of 'tzselect --help', 'zdump --help', and 'zic --help' 3479 now uses tz (a] iana.org rather than the old elsie address. 3480 3481 zic -v now complains about abbreviations that are less than 3 3482 or more than 6 characters, as per Posix. Formerly, it checked 3483 for abbreviations that were more than 3. 3484 3485 'make public' no longer puts its temporary directory under /tmp, 3486 and uses the just-built zic rather than the system zic. 3487 3488 Various fixes to documentation and commentary. 3489 3490 3491 Release 2012i - 2012-11-03 12:57:09 -0700 3492 3493 Cuba switches from DST tomorrow at 01:00. (Thanks to Steffen Thorsen.) 3494 3495 Linker flags can now be specified via LDFLAGS. 3496 AWK now defaults to 'awk', not 'nawk'. 3497 The shell in tzselect now defaults to /bin/bash, but this can 3498 be overridden by specifying KSHELL. 3499 The main web page now mentions the unofficial GitHub repository. 3500 (Thanks to Mike Frysinger.) 3501 3502 Tarball signatures can now be built by running 'make signatures'. 3503 There are also new makefile rules 'tarballs', 'check_public', and 3504 separate makefile rules for each tarball and signature file. 3505 A few makefile rules are now more portable to strict POSIX. 3506 3507 The main web page now lists the canonical IANA URL. 3508 3509 3510 Release 2012h - 2012-10-26 22:49:10 -0700 3511 3512 Bahia no longer has DST. (Thanks to Kelley Cook.) 3513 3514 Tocantins has DST. (Thanks to Rodrigo Severo.) 3515 3516 Israel has new DST rules next year. (Thanks to Ephraim Silverberg.) 3517 3518 Jordan stays on DST this winter. (Thanks to Steffen Thorsen.) 3519 3520 Web page updates. 3521 3522 More C modernization, except that at Arthur David Olson's suggestion 3523 the instances of 'register' were kept. 3524 3525 3526 Release 2012g - 2012-10-17 20:59:45 -0700 3527 3528 Samoa fall 2012 and later. (Thanks to Nicholas Pereira and Robert Elz.) 3529 3530 Palestine fall 2012. (Thanks to Steffen Thorsen.) 3531 3532 Assume C89. 3533 3534 To attack the version-number problem, this release ships the file 3535 'Makefile' (which contains the release number) in both the tzcode and 3536 the tzdata tarballs. The two Makefiles are identical, and should be 3537 identical in any matching pair of tarballs, so it shouldn't matter 3538 which order you extract the tarballs. Perhaps we can come up with a 3539 better version-number scheme at some point; this scheme does have the 3540 virtue of not adding more files. 3541 3542 3543 Release 2012f - 2012-09-12 23:17:03 -0700 3544 3545 * australasia (Pacific/Fiji): Fiji DST is October 21 through January 3546 20 this year. (Thanks to Steffen Thorsen.) 3547 3548 3549 Release 2012e - 2012-08-02 20:44:55 -0700 3550 3551 * australasia (Pacific/Fakaofo): Tokelau is UT +13, not +14. 3552 (Thanks to Steffen Thorsen.) 3553 3554 * Use a single version number for both code and data. 3555 3556 * .gitignore: New file. 3557 3558 * Remove trailing white space. 3559 3560 3561 Release code2012c-data2012d - 2012-07-19 16:35:33 -0700 3562 3563 Changes for Morocco's timestamps, which take effect in a couple of 3564 hours, along with infrastructure changes to accommodate how the tz 3565 code and data are released on IANA. 3566 3567 3568 Release data2012c - 2012-03-27 12:17:25 -0400 3569 3570 africa 3571 Summer time changes for Morocco (to start late April 2012) 3572 3573 asia 3574 Changes for 2012 for Gaza & the West Bank (Hebron) and Syria 3575 3576 northamerica 3577 Haiti following US/Canada rules for 2012 (and we're assuming, 3578 for now anyway, for the future). 3579 3580 3581 Release 2012b - 2012-03-02 12:29:15 +0700 3582 3583 There is just one change to tzcode2012b (compared with 2012a): 3584 the Makefile that was accidentally included with 2012a has been 3585 replaced with the version that should have been there, which is 3586 identical with the previous version (from tzcode2011i). 3587 3588 There are just two changes in tzdata2012b compared with 2012a. 3589 3590 Most significantly, summer time in Cuba has been delayed 3 weeks 3591 (now starts April 1 rather than March 11). Since Mar 11 (the old start 3592 date, as listed in 2012a) is just a little over a week away, this 3593 change is urgent. 3594 3595 Less importantly, an excess tab in one of the changes in zone.tab 3596 in 2012a has been removed. 3597 3598 3599 Release 2012a - 2012-03-01 18:28:10 +0700 3600 3601 The changes in tzcode2012a (compared to the previous version, 2011i) 3602 are entirely to the README and tz-art.htm and tz-link.htm files, if 3603 none of those concern you, you can ignore the code update. The changes 3604 reflect the changed addresses for the mailing list and the code and 3605 data distribution points & methods (and a link to DateTime::TimeZone::Tzfile 3606 has been added to tz-link.htm). 3607 3608 In tzdata2012a (compared to the previous release, which was 2011n) 3609 the major changes are: 3610 Chile 2011/2012 and 2012/2013 summer time date adjustments. 3611 Falkland Islands onto permanent summer time (we're assuming for the 3612 foreseeable future, though 2012 is all we're fairly certain of.) 3613 Armenia has abolished Summer Time. 3614 Tokelau jumped the International Date Line back last December 3615 (just the same as their near neighbour, Samoa). 3616 America/Creston is a new zone for a small area of British Columbia 3617 There will be a leapsecond 2012-06-30 23:59:60 UTC. 3618 3619 Other minor changes are: 3620 Corrections to 1918 Canadian summer time end dates. 3621 Updated URL for UK time zone history (in comments) 3622 A few typos in Le Corre's list of free French place names (comments) 3623 3624 3625 Release data2011n - 2011-10-30 14:57:54 +0700 3626 3627 There are three changes of note - most urgently, Cuba (America/Havana) 3628 has extended summer time by two weeks, now to end on Nov 13, rather than 3629 the (already past) Oct 30. Second, the Pridnestrovian Moldavian Republic 3630 (Europe/Tiraspol) decided not to split from the rest of Moldova after 3631 all, and consequently that zone has been removed (again) and reinstated 3632 in the "backward" file as a link to Europe/Chisinau. And third, the 3633 end date for Fiji's summer time this summer was moved forward from the 3634 earlier planned Feb 26, to Jan 22. 3635 3636 Apart from that, Moldova (MD) returns to a single entry in zone.tab 3637 (and the incorrect syntax that was in the 2011m version of that file 3638 is so fixed - it would have been fixed in a different way had this 3639 change not happened - that's the "missing" sccs version id). 3640 3641 3642 Release data2011m - 2011-10-24 21:42:16 +0700 3643 3644 In particular, the typos in comments in the data (2011-11-17 should have 3645 been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that 3646 Tim Parenti noted) have been fixed, and the change for Ukraine has been 3647 made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to 3648 Tim Parenti, and also Denys Gavrysh) 3649 3650 In addition, I added Europe/Tiraspol to zone.tab. 3651 3652 This time, all the files have new version numbers... (including the files 3653 otherwise unchanged in 2011m that were changed in 2011l but didn't get new 3654 version numbers there...) 3655 3656 3657 Release data2011l - 2011-10-10 11:15:43 +0700 3658 3659 There are just 2 changes that cause different generated tzdata files from 3660 zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil 3661 is included, but commented out. Compared with the diff I sent out last week, 3662 this version also includes attributions for the sources for the changes 3663 (in much the same format as ado used, but the html tags have not been 3664 checked, verified, or used in any way at all, so if there are errors there, 3665 please let me know.) 3666 3667 3668 Release data2011k - 2011-09-20 17:54:03 -0400 3669 3670 [not summarized] 3671 3672 3673 Release data2011j - 2011-09-12 09:22:49 -0400 3674 3675 (contemporary changes for Samoa; past changes for Kenya, Uganda, and 3676 Tanzania); there are also two spelling corrections to comments in 3677 the australasia file (with thanks to Christos Zoulas). 3678 3679 3680 Release 2011i - 2011-08-29 05:56:32 -0400 3681 3682 [not summarized] 3683 3684 3685 Release data2011h - 2011-06-15 18:41:48 -0400 3686 3687 Russia and Curaao changes 3688 3689 3690 Release 2011g - 2011-04-25 09:07:22 -0400 3691 3692 update the rules for Egypt to reflect its abandonment of DST this year 3693 3694 3695 Release 2011f - 2011-04-06 17:14:53 -0400 3696 3697 [not summarized] 3698 3699 3700 Release 2011e - 2011-03-31 16:04:38 -0400 3701 3702 Morocco, Chile, and tz-link changes 3703 3704 3705 Release 2011d - 2011-03-14 09:18:01 -0400 3706 3707 changes that impact present-day timestamps in Cuba, Samoa, and Turkey 3708 3709 3710 Release 2011c - 2011-03-07 09:30:09 -0500 3711 3712 These do affect current timestamps in Chile and Annette Island, Canada. 3713 3714 3715 Release 2011b - 2011-02-07 08:44:50 -0500 3716 3717 [not summarized] 3718 3719 3720 Release 2011a - 2011-01-24 10:30:16 -0500 3721 3722 [not summarized] 3723 3724 3725 Release data2010o - 2010-11-01 09:18:23 -0400 3726 3727 change to the end of DST in Fiji in 2011 3728 3729 3730 Release 2010n - 2010-10-25 08:19:17 -0400 3731 3732 [not summarized] 3733 3734 3735 Release 2010m - 2010-09-27 09:24:48 -0400 3736 3737 Hong Kong, Vostok, and zic.c changes 3738 3739 3740 Release 2010l - 2010-08-16 06:57:25 -0400 3741 3742 [not summarized] 3743 3744 3745 Release 2010k - 2010-07-26 10:42:27 -0400 3746 3747 [not summarized] 3748 3749 3750 Release 2010j - 2010-05-10 09:07:48 -0400 3751 3752 changes for Baha de Banderas and for version naming 3753 3754 3755 Release data2010i - 2010-04-16 18:50:45 -0400 3756 3757 the end of DST in Morocco on 2010-08-08 3758 3759 3760 Release data2010h - 2010-04-05 09:58:56 -0400 3761 3762 [not summarized] 3763 3764 3765 Release data2010g - 2010-03-24 11:14:53 -0400 3766 3767 [not summarized] 3768 3769 3770 Release 2010f - 2010-03-22 09:45:46 -0400 3771 3772 [not summarized] 3773 3774 3775 Release data2010e - 2010-03-08 14:24:27 -0500 3776 3777 corrects the Dhaka bug found by Danvin Ruangchan 3778 3779 3780 Release data2010d - 2010-03-06 07:26:01 -0500 3781 3782 [not summarized] 3783 3784 3785 Release 2010c - 2010-03-01 09:20:58 -0500 3786 3787 changes including KRE's suggestion for earlier initialization of 3788 "goahead" and "goback" structure elements 3789 3790 3791 Release code2010a - 2010-02-16 10:40:04 -0500 3792 3793 [not summarized] 3794 3795 3796 Release data2010b - 2010-01-20 12:37:01 -0500 3797 3798 Mexico changes 3799 3800 3801 Release data2010a - 2010-01-18 08:30:04 -0500 3802 3803 changes to Dhaka 3804 3805 3806 Release data2009u - 2009-12-26 08:32:28 -0500 3807 3808 changes to DST in Bangladesh 3809 3810 3811 Release 2009t - 2009-12-21 13:24:27 -0500 3812 3813 [not summarized] 3814 3815 3816 Release data2009s - 2009-11-14 10:26:32 -0500 3817 3818 (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change 3819 3820 3821 Release 2009r - 2009-11-09 10:10:31 -0500 3822 3823 "antarctica" and "tz-link.htm" changes 3824 3825 3826 Release 2009q - 2009-11-02 09:12:40 -0500 3827 3828 with two corrections as reported by Eric Muller and Philip Newton 3829 3830 3831 Release data2009p - 2009-10-23 15:05:27 -0400 3832 3833 Argentina (including San Luis) changes (with the correction from 3834 Mariano Absatz) 3835 3836 3837 Release data2009o - 2009-10-14 16:49:38 -0400 3838 3839 Samoa (commentary only), Pakistan, and Bangladesh changes 3840 3841 3842 Release data2009n - 2009-09-22 15:13:38 -0400 3843 3844 added commentary for Argentina and a change to the end of DST in 3845 2009 in Pakistan 3846 3847 3848 Release data2009m - 2009-09-03 10:23:43 -0400 3849 3850 Samoa and Palestine changes 3851 3852 3853 Release data2009l - 2009-08-14 09:13:07 -0400 3854 3855 Samoa (comments only) and Egypt 3856 3857 3858 Release 2009k - 2009-07-20 09:46:08 -0400 3859 3860 [not summarized] 3861 3862 3863 Release data2009j - 2009-06-15 06:43:59 -0400 3864 3865 Bangladesh change (with a short turnaround since the DST change is 3866 impending) 3867 3868 3869 Release 2009i - 2009-06-08 09:21:22 -0400 3870 3871 updating for DST in Bangladesh this year 3872 3873 3874 Release 2009h - 2009-05-26 09:19:14 -0400 3875 3876 [not summarized] 3877 3878 3879 Release data2009g - 2009-04-20 16:34:07 -0400 3880 3881 Cairo 3882 3883 3884 Release data2009f - 2009-04-10 11:00:52 -0400 3885 3886 correct DST in Pakistan 3887 3888 3889 Release 2009e - 2009-04-06 09:08:11 -0400 3890 3891 [not summarized] 3892 3893 3894 Release 2009d - 2009-03-23 09:38:12 -0400 3895 3896 Morocco, Tunisia, Argentina, and American Astronomical Society changes 3897 3898 3899 Release data2009c - 2009-03-16 09:47:51 -0400 3900 3901 change to the start of Cuban DST 3902 3903 3904 Release 2009b - 2009-02-09 11:15:22 -0500 3905 3906 [not summarized] 3907 3908 3909 Release 2009a - 2009-01-21 10:09:39 -0500 3910 3911 [not summarized] 3912 3913 3914 Release data2008i - 2008-10-21 12:10:25 -0400 3915 3916 southamerica and zone.tab files, with Argentina DST rule changes and 3917 United States zone reordering and recommenting 3918 3919 3920 Release 2008h - 2008-10-13 07:33:56 -0400 3921 3922 [not summarized] 3923 3924 3925 Release 2008g - 2008-10-06 09:03:18 -0400 3926 3927 Fix a broken HTML anchor and update Brazil's DST transitions; 3928 there's also a slight reordering of information in tz-art.htm. 3929 3930 3931 Release data2008f - 2008-09-09 22:33:26 -0400 3932 3933 [not summarized] 3934 3935 3936 Release 2008e - 2008-07-28 14:11:17 -0400 3937 3938 changes by Arthur David Olson and Jesper Nrgaard Welen 3939 3940 3941 Release data2008d - 2008-07-07 09:51:38 -0400 3942 3943 changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo 3944 3945 3946 Release data2008c - 2008-05-19 17:48:03 -0400 3947 3948 Pakistan, Morocco, and Mongolia 3949 3950 3951 Release data2008b - 2008-03-24 08:30:59 -0400 3952 3953 including renaming Asia/Calcutta to Asia/Kolkata, with a backward 3954 link provided 3955 3956 3957 Release 2008a - 2008-03-08 05:42:16 -0500 3958 3959 [not summarized] 3960 3961 3962 Release 2007k - 2007-12-31 10:25:22 -0500 3963 3964 most importantly, changes to the "southamerica" file based on 3965 Argentina's readoption of daylight saving time 3966 3967 3968 Release 2007j - 2007-12-03 09:51:01 -0500 3969 3970 1. eliminate the "P" (parameter) macro; 3971 3972 2. the "noncontroversial" changes circulated on the time zone 3973 mailing list (less the changes to "logwtmp.c"); 3974 3975 3. eliminate "too many transition" errors when "min" is used in time 3976 zone rules; 3977 3978 4. changes by Paul Eggert (including updated information for Venezuela). 3979 3980 3981 Release data2007i - 2007-10-30 10:28:11 -0400 3982 3983 changes for Cuba and Syria 3984 3985 3986 Release 2007h - 2007-10-01 10:05:51 -0400 3987 3988 changes by Paul Eggert, as well as an updated link to the ICU 3989 project in tz-link.htm 3990 3991 3992 Release 2007g - 2007-08-20 10:47:59 -0400 3993 3994 changes by Paul Eggert 3995 3996 The "leapseconds" file has been updated to incorporate the most 3997 recent International Earth Rotation and Reference Systems Service 3998 (IERS) bulletin. 3999 4000 There's an addition to tz-art.htm regarding the television show "Medium". 4001 4002 4003 Release 2007f - 2007-05-07 10:46:46 -0400 4004 4005 changes by Paul Eggert (including Haiti, Turks and Caicos, and New 4006 Zealand) 4007 4008 changes to zic.c to allow hour values greater than 24 (along with 4009 Paul's improved time value overflow checking) 4010 4011 4012 Release 2007e - 2007-04-02 10:11:52 -0400 4013 4014 Syria and Honduras changes by Paul Eggert 4015 4016 zic.c variable renaming changes by Arthur David Olson 4017 4018 4019 Release 2007d - 2007-03-20 08:48:30 -0400 4020 4021 changes by Paul Eggert 4022 4023 the elimination of white space at the ends of lines 4024 4025 4026 Release 2007c - 2007-02-26 09:09:37 -0500 4027 4028 changes by Paul Eggert 4029 4030 4031 Release 2007b - 2007-02-12 09:34:20 -0500 4032 4033 Paul Eggert's proposed change to the quotation handling logic in zic.c. 4034 4035 changes to the commentary in "leapseconds" reflecting the IERS 4036 announcement that there is to be no positive leap second at the end 4037 of June 2007. 4038 4039 4040 Release 2007a - 2007-01-08 12:28:29 -0500 4041 4042 changes by Paul Eggert 4043 4044 Derick Rethan's Asmara change 4045 4046 Oscar van Vlijmen's Easter Island local mean time change 4047 4048 symbolic link changes 4049 4050 4051 Release 2006p - 2006-11-27 08:54:27 -0500 4052 4053 changes by Paul Eggert 4054 4055 4056 Release 2006o - 2006-11-06 09:18:07 -0500 4057 4058 changes by Paul Eggert 4059 4060 4061 Release 2006n - 2006-10-10 11:32:06 -0400 4062 4063 changes by Paul Eggert 4064 4065 4066 Release 2006m - 2006-10-02 15:32:35 -0400 4067 4068 changes for Uruguay, Palestine, and Egypt by Paul Eggert 4069 4070 (minimalist) changes to zic.8 to clarify "until" information 4071 4072 4073 Release data2006l - 2006-09-18 12:58:11 -0400 4074 4075 Paul's best-effort work on this coming weekend's Egypt time change 4076 4077 4078 Release 2006k - 2006-08-28 12:19:09 -0400 4079 4080 changes by Paul Eggert 4081 4082 4083 Release 2006j - 2006-08-21 09:56:32 -0400 4084 4085 changes by Paul Eggert 4086 4087 4088 Release code2006i - 2006-08-07 12:30:55 -0400 4089 4090 localtime.c fixes 4091 4092 Ken Pizzini's conversion script 4093 4094 4095 Release code2006h - 2006-07-24 09:19:37 -0400 4096 4097 adds public domain notices to four files 4098 4099 includes a fix for transition times being off by a second 4100 4101 adds a new recording to the "arts" file (information courtesy Colin Bowern) 4102 4103 4104 Release 2006g - 2006-05-08 17:18:09 -0400 4105 4106 northamerica changes by Paul Eggert 4107 4108 4109 Release 2006f - 2006-05-01 11:46:00 -0400 4110 4111 a missing version number problem is fixed (with thanks to Bradley 4112 White for catching the problem) 4113 4114 4115 Release 2006d - 2006-04-17 14:33:43 -0400 4116 4117 changes by Paul Eggert 4118 4119 added new items to tz-arts.htm that were found by Paul 4120 4121 4122 Release 2006c - 2006-04-03 10:09:32 -0400 4123 4124 two sets of data changes by Paul Eggert 4125 4126 a fencepost error fix in zic.c 4127 4128 changes to zic.c and the "europe" file to minimize differences 4129 between output produced by the old 32-bit zic and the new 64-bit 4130 version 4131 4132 4133 Release 2006b - 2006-02-20 10:08:18 -0500 4134 [tz32code2006b + tz64code2006b + tzdata2006b] 4135 4136 64-bit code 4137 4138 All SCCS IDs were bumped to "8.1" for this release. 4139 4140 4141 Release 2006a - 2006-01-30 08:59:31 -0500 4142 4143 changes by Paul Eggert (in particular, Indiana time zone moves) 4144 4145 an addition to the zic manual page to describe how special-case 4146 transitions are handled 4147 4148 4149 Release 2005r - 2005-12-27 09:27:13 -0500 4150 4151 Canadian changes by Paul Eggert 4152 4153 They also add "<pre>" directives to time zone data files and reflect 4154 changes to warning message logic in "zdump.c" (but with calls to 4155 "gettext" kept unbundled at the suggestion of Ken Pizzini). 4156 4157 4158 Release 2005q - 2005-12-13 09:17:09 -0500 4159 4160 Nothing earth-shaking here: 4161 1. Electronic mail addresses have been removed. 4162 2. Casts of the return value of exit have been removed. 4163 3. Casts of the argument of is.* macros have been added. 4164 4. Indentation in one section of zic.c has been fixed. 4165 5. References to dead URLs in the data files have been dealt with. 4166 4167 4168 Release 2005p - 2005-12-05 10:30:53 -0500 4169 4170 "systemv", "tz-link.htm", and "zdump.c" changes 4171 (less the casts of arguments to the is* macros) 4172 4173 4174 Release 2005o - 2005-11-28 10:55:26 -0500 4175 4176 Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert 4177 4178 zdump.c lint fixes by Arthur David Olson 4179 4180 4181 Release 2005n - 2005-10-03 09:44:09 -0400 4182 4183 changes by Paul Eggert (both the Uruguay changes and the Kyrgyzstan 4184 et al. changes) 4185 4186 4187 Release 2005m - 2005-08-29 12:15:40 -0400 4188 4189 changes by Paul Eggert (with a small tweak to the tz-art change) 4190 4191 a declaration of an unused variable has been removed from zdump.c 4192 4193 4194 Release 2005l - 2005-08-22 12:06:39 -0400 4195 4196 changes by Paul Eggert 4197 4198 overflow/underflow checks by Arthur David Olson, minus changes to 4199 the "Theory" file about the pending addition of 64-bit data (I grow 4200 less confident of the changes being accepted with each passing day, 4201 and the changes no longer increase the data files nine-fold--there's 4202 less than a doubling in size by my local Sun's reckoning) 4203 4204 4205 Release 2005k - 2005-07-14 14:14:24 -0400 4206 4207 The "leapseconds" file has been edited to reflect the recently 4208 announced leap second at the end of 2005. 4209 4210 I've also deleted electronic mail addresses from the files as an 4211 anti-spam measure. 4212 4213 4214 Release 2005j - 2005-06-13 14:34:13 -0400 4215 4216 These reflect changes to limit the length of time zone abbreviations 4217 and the characters used in those abbreviations. 4218 4219 There are also changes to handle POSIX-style "quoted" timezone 4220 environment variables. 4221 4222 The changes were circulated on the time zone mailing list; the only 4223 change since then was the removal of a couple of minimum-length of 4224 abbreviation checks. 4225 4226 4227 Release data2005i - 2005-04-21 15:04:16 -0400 4228 4229 changes (most importantly to Nicaragua and Haiti) by Paul Eggert 4230 4231 4232 Release 2005h - 2005-04-04 11:24:47 -0400 4233 4234 changes by Paul Eggert 4235 4236 minor changes to Makefile and zdump.c to produce more useful output 4237 when doing a "make typecheck" 4238 4239 4240 Release 2005g - 2005-03-14 10:11:21 -0500 4241 4242 changes by Paul Eggert (a change to current DST rules in Uruguay and 4243 an update to a link to time zone software) 4244 4245 4246 Release 2005f - 2005-03-01 08:45:32 -0500 4247 4248 data and documentation changes by Paul Eggert 4249 4250 4251 Release 2005e - 2005-02-10 15:59:44 -0500 4252 4253 [not summarized] 4254 4255 4256 Release code2005d - 2005-01-31 09:21:47 -0500 4257 4258 make zic complain about links to links if the -v flag is used 4259 4260 have "make public" do more code checking 4261 4262 add an include to "localtime.c" for the benefit of gcc systems 4263 4264 4265 Release 2005c - 2005-01-17 18:36:29 -0500 4266 4267 get better results when mktime runs on a system where time_t is double 4268 4269 changes to the data files (most importantly to Paraguay) 4270 4271 4272 Release 2005b - 2005-01-10 09:19:54 -0500 4273 4274 Get localtime and gmtime working on systems with exotic time_t types. 4275 4276 Update the leap second commentary in the "leapseconds" file. 4277 4278 4279 Release 2005a - 2005-01-01 13:13:44 -0500 4280 4281 [not summarized] 4282 4283 4284 Release code2004i - 2004-12-14 13:42:58 -0500 4285 4286 Deal with systems where time_t is unsigned. 4287 4288 4289 Release code2004h - 2004-12-07 11:40:18 -0500 4290 4291 64-bit-time_t changes 4292 4293 4294 Release 2004g - 2004-11-02 09:06:01 -0500 4295 4296 update to Cuba (taking effect this weekend) 4297 4298 other changes by Paul Eggert 4299 4300 correction of the spelling of Oslo 4301 4302 changed versions of difftime.c and private.h 4303 4304 4305 Release code2004f - 2004-10-21 10:25:22 -0400 4306 4307 Cope with wide-ranging tm_year values. 4308 4309 4310 Release 2004e - 2004-10-11 14:47:21 -0400 4311 4312 Brazil/Argentina/Israel changes by Paul Eggert 4313 4314 changes to tz-link.htm by Paul 4315 4316 one small fix to Makefile 4317 4318 4319 Release 2004d - 2004-09-22 08:27:29 -0400 4320 4321 Avoid overflow problems when TM_YEAR_BASE is added to an integer. 4322 4323 4324 Release 2004c - 2004-08-11 12:06:26 -0400 4325 4326 asctime-related changes 4327 4328 (variants of) some of the documentation changes suggested by Paul Eggert 4329 4330 4331 Release 2004b - 2004-07-19 14:33:35 -0400 4332 4333 data changes by Paul Eggert - most importantly, updates for Argentina 4334 4335 4336 Release 2004a - 2004-05-27 12:00:47 -0400 4337 4338 changes by Paul Eggert 4339 4340 Handle DST transitions that occur at the end of a month in some 4341 years but at the start of the following month in other years. 4342 4343 Add a copy of the correspondence that's the basis for claims about 4344 DST in the Navajo Nation. 4345 4346 4347 Release 2003e - 2003-12-15 09:36:47 -0500 4348 4349 changes by Arthur David Olson (primarily code changes) 4350 4351 changes by Paul Eggert (primarily data changes) 4352 4353 minor changes to "Makefile" and "northamerica" (in the latter case, 4354 optimization of the "Toronto" rules) 4355 4356 4357 Release 2003d - 2003-10-06 09:34:44 -0400 4358 4359 changes by Paul Eggert 4360 4361 4362 Release 2003c - 2003-09-16 10:47:05 -0400 4363 4364 Fix bad returns in zic.c's inleap function. 4365 Thanks to Bradley White for catching the problem! 4366 4367 4368 Release 2003b - 2003-09-16 07:13:44 -0400 4369 4370 Add a "--version" option (and documentation) to the zic and zdump commands. 4371 4372 changes to overflow/underflow checking in zic 4373 4374 a localtime typo fix. 4375 4376 Update the leapseconds and tz-art.htm files. 4377 4378 4379 Release 2003a - 2003-03-24 09:30:54 -0500 4380 4381 changes by Paul Eggert 4382 4383 a few additions and modifications to the tz-art.htm file 4384 4385 4386 Release 2002d - 2002-10-15 13:12:42 -0400 4387 4388 changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab 4389 4390 There's also a new time zone quote in "tz-art.htm". 4391 4392 4393 Release 2002c - 2002-04-04 11:55:20 -0500 4394 4395 changes by Paul Eggert 4396 4397 Change zic.c to avoid creating symlinks to files that don't exist. 4398 4399 4400 Release 2002b - 2002-01-28 12:56:03 -0500 4401 4402 [These change notes are for Release 2002a, which was corrupted. 4403 2002b was a corrected version of 2002a.] 4404 4405 changes by Paul Eggert 4406 4407 Update the "leapseconds" file to note that there'll be no leap 4408 second at the end of June, 2002. 4409 4410 Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone. 4411 4412 Change to "difftime.c" to avoid sizeof problems. 4413 4414 4415 Release 2001d - 2001-10-09 13:31:32 -0400 4416 4417 changes by Paul Eggert 4418 4419 4420 Release 2001c - 2001-06-05 13:59:55 -0400 4421 4422 changes by Paul Eggert and Andrew Brown 4423 4424 4425 Release 2001b - 2001-04-05 16:44:38 -0400 4426 4427 changes by Paul Eggert (modulo jnorgard's typo fix) 4428 4429 tz-art.htm has been HTMLified. 4430 4431 4432 Release 2001a - 2001-03-13 12:57:44 -0500 4433 4434 changes by Paul Eggert 4435 4436 An addition to the "leapseconds" file: comments with the text of the 4437 latest IERS leap second notice. 4438 4439 Trailing white space has been removed from data file lines, and 4440 repeated spaces in "Rule Jordan" lines in the "asia" file have been 4441 converted to tabs. 4442 4443 4444 Release 2000h - 2000-12-14 15:33:38 -0500 4445 4446 changes by Paul Eggert 4447 4448 one typo fix in the "art" file 4449 4450 With providence, this is the last update of the millennium. 4451 4452 4453 Release 2000g - 2000-10-10 11:35:22 -0400 4454 4455 changes by Paul Eggert 4456 4457 correction of John Mackin's name submitted by Robert Elz 4458 4459 Garry Shandling's Daylight Saving Time joke (!?!) from the recent 4460 Emmy Awards broadcast. 4461 4462 4463 Release 2000f - 2000-08-10 09:31:58 -0400 4464 4465 changes by Paul Eggert 4466 4467 Added information in "tz-art.htm" on a Seinfeld reference to DST. 4468 4469 Error checking and messages in the "yearistype" script have been 4470 improved. 4471 4472 4473 Release 2000e - 2000-07-31 09:27:54 -0400 4474 4475 data changes by Paul Eggert 4476 4477 a change to the default value of the defined constant HAVE_STRERROR 4478 4479 the addition of a Dave Barry quote on DST to the tz-arts file 4480 4481 4482 Release 2000d - 2000-04-20 15:43:04 -0400 4483 4484 changes to the documentation and code of strftime for C99 conformance 4485 4486 a bug fix for date.c 4487 4488 These are based on (though modified from) changes by Paul Eggert. 4489 4490 4491 Release 2000c - 2000-03-04 10:31:43 -0500 4492 4493 changes by Paul Eggert 4494 4495 4496 Release 2000b - 2000-02-21 12:16:29 -0500 4497 4498 changes by Paul Eggert and Joseph Myers 4499 4500 modest tweaks to the tz-art.htm and tz-link.htm files 4501 4502 4503 Release 2000a - 2000-01-18 09:21:26 -0500 4504 4505 changes by Paul Eggert 4506 4507 The two hypertext documents have also been renamed. 4508 4509 4510 Release code1999i-data1999j - 1999-11-15 18:43:22 -0500 4511 4512 Paul Eggert's changes 4513 4514 additions to the "zic" manual page and the "Arts.htm" file 4515 4516 4517 Release code1999h-data1999i - 1999-11-08 14:55:21 -0500 4518 4519 [not summarized] 4520 4521 4522 Release data1999h - 1999-10-07 03:50:29 -0400 4523 4524 changes by Paul Eggert to "europe" (most importantly, fixing 4525 Lithuania and Estonia) 4526 4527 4528 Release 1999g - 1999-09-28 11:06:18 -0400 4529 4530 data changes by Paul Eggert (most importantly, the change for 4531 Lebanon that buys correctness for this coming Sunday) 4532 4533 The "code" file contains changes to "Makefile" and "checktab.awk" to 4534 allow better checking of time zone files before they are published. 4535 4536 4537 Release 1999f - 1999-09-23 09:48:14 -0400 4538 4539 changes by Arthur David Olson and Paul Eggert 4540 4541 4542 Release 1999e - 1999-08-17 15:20:54 -0400 4543 4544 changes circulated by Paul Eggert, although the change to handling 4545 of DST-specifying timezone names has been commented out for now 4546 (search for "XXX" in "localtime.c" for details). These files also 4547 do not make any changes to the start of DST in Brazil. 4548 4549 In addition to Paul's changes, there are updates to "Arts.htm" and 4550 cleanups of URLs. 4551 4552 4553 Release 1999d - 1999-03-30 11:31:07 -0500 4554 4555 changes by Paul Eggert 4556 4557 The Makefile's "make public" rule has also been changed to do a test 4558 compile of each individual time zone data file (which should help 4559 avoid problems such as the one we had with Nicosia). 4560 4561 4562 Release 1999c - 1999-03-25 09:47:47 -0500 4563 4564 changes by Paul Eggert, most importantly the change for Chile. 4565 4566 4567 Release 1999b - 1999-02-01 17:51:44 -0500 4568 4569 changes by Paul Eggert 4570 4571 code changes (suggested by Mani Varadarajan, mani at be.com) for 4572 correct handling of symbolic links when building using a relative directory 4573 4574 code changes to generate correct messages for failed links 4575 4576 updates to the URLs in Arts.htm 4577 4578 4579 Release 1999a - 1999-01-19 16:20:29 -0500 4580 4581 error message internationalizations and corrections in zic.c and 4582 zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz, 4583 to whom thanks!) 4584 4585 4586 Release code1998h-data1998i - 1998-10-01 09:56:10 -0400 4587 4588 changes for Brazil, Chile, and Germany 4589 4590 support for use of "24:00" in the input files for the time zone compiler 4591 4592 4593 Release code1998g-data1998h - 1998-09-24 10:50:28 -0400 4594 4595 changes by Paul Eggert 4596 4597 correction to a define in the "private.h" file 4598 4599 4600 Release data1998g - 1998-08-11 03:28:35 -0000 4601 [tzdata1998g.tar.gz is missing!] 4602 4603 Lithuanian change provided by mgedmin at pub.osf.it 4604 4605 Move creation of the GMT link with Etc/GMT to "etcetera" (from 4606 "backward") to ensure that the GMT file is created even where folks 4607 don't want the "backward" links (as suggested by Paul Eggert). 4608 4609 4610 Release data1998f - 1998-07-20 13:50:00 -0000 4611 [tzdata1998f.tar.gz is missing!] 4612 4613 Update the "leapseconds" file to include the newly-announced 4614 insertion at the end of 1998. 4615 4616 4617 Release code1998f - 1998-06-01 10:18:31 -0400 4618 4619 addition to localtime.c by Guy Harris 4620 4621 4622 Release 1998e - 1998-05-28 09:56:26 -0400 4623 4624 The Makefile is changed to produce zoneinfo-posix rather than 4625 zoneinfo/posix, and to produce zoneinfo-leaps rather than 4626 zoneinfo/right. 4627 4628 data changes by Paul Eggert 4629 4630 changes from Guy Harris to provide asctime_r and ctime_r 4631 4632 A usno1998 file (substantially identical to usno1997) has been added. 4633 4634 4635 Release 1998d - 1998-05-14 11:58:34 -0400 4636 4637 changes to comments (in particular, elimination of references to CIA maps). 4638 "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places 4639 where changes occur. 4640 4641 4642 Release 1998c - 1998-02-28 12:32:26 -0500 4643 4644 changes by Paul Eggert (save the "French correction," on which I'll 4645 wait for the dust to settle) 4646 4647 symlink changes 4648 4649 changes and additions to Arts.htm 4650 4651 4652 Release 1998b - 1998-01-17 14:31:51 -0500 4653 4654 URL cleanups and additions 4655 4656 4657 Release 1998a - 1998-01-13 12:37:35 -0500 4658 4659 changes by Paul Eggert 4660 4661 4662 Release code1997i-data1997k - 1997-12-29 09:53:41 -0500 4663 4664 changes by Paul Eggert, with minor modifications from Arthur David 4665 Olson to make the files more browser friendly 4666 4667 4668 Release code1997h-data1997j - 1997-12-18 17:47:35 -0500 4669 4670 minor changes to put "TZif" at the start of each timezone information file 4671 4672 a rule has also been added to the Makefile so you can 4673 make zones 4674 to just recompile the zone information files (rather than doing a 4675 full "make install" with its other effects). 4676 4677 4678 Release data1997i - 1997-10-07 08:45:38 -0400 4679 4680 changes to Africa by Paul Eggert 4681 4682 4683 Release code1997g-data1997h - 1997-09-04 16:56:54 -0400 4684 4685 corrections for Uruguay (and other locations) 4686 4687 Arthur David Olson's simple-minded fix allowing mktime to both 4688 correctly handle leap seconds and correctly handle tm_sec values 4689 upon which arithmetic has been performed. 4690 4691 4692 Release code1997f-data1997g - 1997-07-19 13:15:02 -0400 4693 4694 Paul Eggert's updates 4695 4696 a small change to a function prototype; 4697 4698 "Music" has been renamed "Arts.htm", HTMLified, and augmented to 4699 include information on Around the World in Eighty Days. 4700 4701 4702 Release code1997e-data1997f - 1997-05-03 18:52:34 -0400 4703 4704 fixes to zic's error handling 4705 4706 changes inspired by the item circulated on Slovenia 4707 4708 The description of Web resources has been HTMLified for browsing 4709 convenience. 4710 4711 A new piece of tz-related music has been added to the "Music" file. 4712 4713 4714 Release code1997d-data1997e - 1997-03-29 12:48:52 -0500 4715 4716 Paul Eggert's latest suggestions 4717 4718 4719 Release code1997c-data1997d - 1997-03-07 20:37:54 -0500 4720 4721 changes to "zic.c" to correct performance of the "-s" option 4722 4723 a new file "usno1997" 4724 4725 4726 Release data1997c - 1997-03-04 09:58:18 -0500 4727 4728 changes in Israel 4729 4730 4731 Release 1997b - 1997-02-27 18:34:19 -0500 4732 4733 The data file incorporates the 1997 leap second. 4734 4735 The code file incorporates Arthur David Olson's take on the 4736 zic/multiprocessor/directory-creation situation. 4737 4738 4739 Release 1997a - 1997-01-21 09:11:10 -0500 4740 4741 Paul Eggert's Antarctica (and other changes) 4742 4743 Arthur David Olson finessed the "getopt" issue by checking against 4744 both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1 4745 is returned while SunOS 5.5's manual says EOF is returned). 4746 4747 4748 Release code1996o-data1996n - 1996-12-27 21:42:05 -0500 4749 4750 Paul Eggert's latest changes 4751 4752 4753 Release code1996n - 1996-12-16 09:42:02 -0500 4754 4755 link snapping fix from Bruce Evans (via Garrett Wollman) 4756 4757 4758 Release data1996m - 1996-11-24 02:37:34 -0000 4759 [tzdata1996m.tar.gz is missing!] 4760 4761 Paul Eggert's batch of changes 4762 4763 4764 Release code1996m-data1996l - 1996-11-05 14:00:12 -0500 4765 4766 No functional changes here; the files have simply been changed to 4767 make more use of ISO style dates in comments. The names of the above 4768 files now include the year in full. 4769 4770 4771 Release code96l - 1996-09-08 17:12:20 -0400 4772 4773 tzcode96k was missing a couple of pieces. 4774 4775 4776 Release 96k - 1996-09-08 16:06:22 -0400 4777 4778 the latest round of changes from Paul Eggert 4779 4780 the recent Year 2000 material 4781 4782 4783 Release code96j - 1996-07-30 13:18:53 -0400 4784 4785 Set sp->typecnt as suggested by Timothy Patrick Murphy. 4786 4787 4788 Release code96i - 1996-07-27 20:11:35 -0400 4789 4790 Paul's suggested patch for strftime %V week numbers 4791 4792 4793 Release data96i - 1996-07-01 18:13:04 -0400 4794 4795 "northamerica" and "europe" changes by Paul Eggert 4796 4797 4798 Release code96h - 1996-06-05 08:02:21 -0400 4799 4800 fix for handling transitions specified in Universal Time 4801 4802 Some "public domain" notices have also been added. 4803 4804 4805 Release code96g - 1996-05-16 14:00:26 -0400 4806 4807 fix for the simultaneous-DST-and-zone-change challenge 4808 4809 4810 Release data96h - 1996-05-09 17:40:51 -0400 4811 4812 changes by Paul Eggert 4813 4814 4815 Release code96f-data96g - 1996-05-03 03:09:59 -0000 4816 [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!] 4817 4818 The changes get us some of the way to fixing the problems noted in Paul 4819 Eggert's letter yesterday (in addition to a few others). The approach 4820 has been to make zic a bit smarter about figuring out what time zone 4821 abbreviations apply just after the time specified in the "UNTIL" part 4822 of a zone line. Putting the smarts in zic means avoiding having 4823 transition times show up in both "Zone" lines and "Rule" lines, which 4824 in turn avoids multiple transition time entries in time zone files. 4825 (This also makes the zic input files such as "europe" a bit shorter and 4826 should ease maintenance.) 4827 4828 4829 Release data96f - 1996-04-19 19:20:03 -0000 4830 [tzdata96f.tar.gz is missing!] 4831 4832 The only changes are to the "northamerica" file; the time zone 4833 abbreviation for Denver is corrected to MST (and MDT), and the 4834 comments for Mexico have been updated. 4835 4836 4837 Release data96e - 1996-03-19 17:37:26 -0500 4838 4839 Proposals by Paul Eggert, in particular the Portugal change that 4840 comes into play at the end of this month. 4841 4842 4843 Release data96d - 1996-03-18 20:49:39 -0500 4844 4845 [not summarized] 4846 4847 4848 Release code96e - 1996-02-29 15:43:27 -0000 4849 [tzcode96e.tar.gz is missing!] 4850 4851 internationalization changes and the fix to the documentation for strftime 4852 4853 4854 Release code96d-data96c - 1996-02-12 11:05:27 -0500 4855 4856 The "code" file simply updates Bob Kridle's electronic address. 4857 4858 The "data" file updates rules for Mexico. 4859 4860 4861 Release data96b - 1996-01-27 15:44:42 -0500 4862 4863 Kiribati change 4864 4865 4866 Release code96c - 1996-01-16 16:58:15 -0500 4867 4868 leap-year streamlining and binary-search changes 4869 4870 fix to newctime.3 4871 4872 4873 Release code96b - 1996-01-10 20:42:39 -0500 4874 4875 fixes and enhancements from Paul Eggert, including code that 4876 emulates the behavior of recent versions of the SunOS "date" 4877 command. 4878 4879 4880 Release 96a - 1996-01-06 09:08:24 -0500 4881 4882 Israel updates 4883 4884 fixes to strftime.c for correct ISO 8601 week number generation, 4885 plus support for two new formats ('G' and 'g') to give ISO 8601 year 4886 numbers (which are not necessarily the same as calendar year numbers) 4887 4888 4889 Release code95i-data95m - 1995-12-21 12:46:47 -0500 4890 4891 The latest revisions from Paul Eggert are included, the usno1995 4892 file has been updated, and a new file ("WWW") covering useful URLs 4893 has been added. 4894 4895 4896 Release code95h-data95l - 1995-12-19 18:10:12 -0500 4897 4898 A simplification of a macro definition, a change to data for Sudan, 4899 and (for last minute shoppers) notes in the "Music" file on the CD 4900 "Old Man Time". 4901 4902 4903 Release code95g-data95k - 1995-10-30 10:32:47 -0500 4904 4905 (slightly reformatted) 8-bit-clean proposed patch 4906 4907 minor patch: US/Eastern -> America/New_York 4908 4909 snapshot of the USNO's latest data ("usno1995") 4910 4911 some other minor cleanups 4912 4913 4914 Release code95f-data95j - 1995-10-28 21:01:34 -0000 4915 [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!] 4916 4917 European cleanups 4918 4919 support for 64-bit time_t's 4920 4921 optimization in localtime.c 4922 4923 4924 Release code95e - 1995-10-13 13:23:57 -0400 4925 4926 the mktime change to scan from future to past when trying to find time zone 4927 offsets 4928 4929 4930 Release data95i - 1995-09-26 10:43:26 -0400 4931 4932 For Canada/Central, guess that the Sun customer's "one week too 4933 early" was just a approximation, and the true error is one month 4934 too early. This is consistent with the rest of Canada. 4935 4936 4937 Release data95h - 1995-09-21 11:26:48 -0400 4938 4939 latest changes from Paul Eggert 4940 4941 4942 Release code95d - 1995-09-14 11:14:45 -0400 4943 4944 the addition of a "Music" file, which documents four recorded 4945 versions of the tune "Save That Time". 4946 4947 4948 Release data95g - 1995-09-01 17:21:36 -0400 4949 4950 "yearistype" correction 4951 4952 4953 Release data95f - 1995-08-28 20:46:56 -0400 4954 4955 Paul Eggert's change to the australasia file 4956 4957 4958 Release data95e - 1995-07-08 18:02:34 -0400 4959 4960 The only change is a leap second at the end of this year. 4961 Thanks to Bradley White for forwarding news on the leap second. 4962 4963 4964 Release data95d - 1995-07-03 13:26:22 -0400 4965 4966 Paul Eggert's changes 4967 4968 4969 Release data95c - 1995-07-02 19:19:28 -0400 4970 4971 changes to "asia", "backward", "europe", and "southamerica" 4972 (read: northamericacentrics need not apply) 4973 4974 4975 Release code95c - 1995-03-13 14:00:46 -0500 4976 4977 one-line fix for sign extension problems in detzcode 4978 4979 4980 Release 95b - 1995-03-04 11:22:38 -0500 4981 4982 Minor changes in both: 4983 4984 The "code" file contains a workaround for the lack of "unistd.h" in 4985 Microsoft C++ version 7. 4986 4987 The "data" file contains a fixed "Link" for America/Shiprock. 4988 4989 4990 Release 94h - 1994-12-10 12:51:14 -0500 4991 4992 The files: 4993 4994 * incorporate the changes to "zdump" and "date" to make changes to 4995 the "TZ" environment variable permanent; 4996 4997 * incorporate the table changes by Paul Eggert; 4998 4999 * include (and document) support for universal time specifications in 5000 data files - but do not (yet) include use of this feature in the 5001 data files. 5002 5003 Think of this as "TZ Classic" - the software has been set up not to break if 5004 universal time shows up in its input, and data entries have been 5005 left as is so as not to break existing implementations. 5006 5007 5008 Release data94f - 1994-08-20 12:56:09 -0400 5009 5010 (with thanks!) the latest data updates from Paul Eggert 5011 5012 5013 Release data94e - 1994-06-04 13:13:53 -0400 5014 5015 [not summarized] 5016 5017 5018 Release code94g - 1994-05-05 12:14:07 -0400 5019 5020 fix missing "optind.c" and a reference to it in the Makefile 5021 5022 5023 Release code94f - 1994-05-05 13:00:33 -0000 5024 [tzcode94f.tar.gz is missing!] 5025 5026 changes to avoid overflow in difftime, as well as changes to cope 5027 with the 52/53 challenge in strftime 5028 5029 5030 Release code94e - 1994-03-30 23:32:59 -0500 5031 5032 change for the benefit of PCTS 5033 5034 5035 Release 94d - 1994-02-24 15:42:25 -0500 5036 5037 Avoid clashes with POSIX semantics for zones such as GMT+4. 5038 5039 Some other very minor housekeeping is also present. 5040 5041 5042 Release code94c - 1994-02-10 08:52:40 -0500 5043 5044 Fix bug where mkdirs was broken unless you compile with 5045 -fwritable-strings (which is generally losing to do). 5046 5047 5048 Release 94b - 1994-02-07 10:04:33 -0500 5049 5050 work by Paul Eggert who notes: 5051 5052 I found another book of time zone histories by E W Whitman; it's not 5053 as extensive as Shanks but has a few goodies of its own. I used it 5054 to update the tables. I also fixed some more as a result of 5055 correspondence with Adam David and Peter Ilieve, and move some stray 5056 links from 'europe' to 'backward'. I corrected some scanning errors 5057 in usno1989. 5058 5059 As far as the code goes, I fixed zic to allow years in the range 5060 INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900. 5061 And I cleaned up the zic documentation a little bit. 5062 5063 5064 Release data94a - 1994-02-03 08:58:54 -0500 5065 5066 It simply incorporates the recently announced leap second into the 5067 "leapseconds" file. 5068 5069 5070 Release 93g - 1993-11-22 17:28:27 -0500 5071 5072 Paul Eggert has provided a good deal of historic information (based 5073 on Shanks), and there are some code changes to deal with the buglets 5074 that crawled out in dealing with the new information. 5075 5076 5077 Release 93f - 1993-10-15 12:27:46 -0400 5078 5079 Paul Eggert's changes 5080 5081 5082 Release 93e - 1993-09-05 21:21:44 -0400 5083 5084 This has updated data for Israel, England, and Kwajalein. There's 5085 also an update to "zdump" to cope with Kwajalein's 24-hour jump. 5086 Thanks to Paul Eggert and Peter Ilieve for the changes. 5087 5088 5089 Release 93d - 1993-06-17 23:34:17 -0400 5090 5091 new fix and new data on Israel 5092 5093 5094 Release 93c - 1993-06-06 19:31:55 -0400 5095 5096 [not summarized] 5097 5098 5099 Release 93b - 1993-02-02 14:53:58 -0500 5100 5101 updated "leapseconds" file 5102 5103 5104 Release 93 - 1993-01-08 07:01:06 -0500 5105 5106 At kre's suggestion, the package has been split in two - a code piece 5107 (which also includes documentation) that's only of use to folks who 5108 want to recompile things and a data piece useful to anyone who can 5109 run "zic". 5110 5111 The new version has a few changes to the data files, a few 5112 portability changes, and an off-by-one fix (with thanks to 5113 Tom Karzes at deshaw.com for providing a description and a 5114 solution). 5115 5116 5117 Release 92c - 1992-11-21 17:35:36 -0000 5118 [tz92c.tar.Z is missing!] 5119 5120 The fallout from the latest round of DST transitions. 5121 5122 There are changes for Portugal, Saskatchewan, and "Pacific-New"; 5123 there's also a change to "zic.c" that makes it portable to more systems. 5124 5125 5126 Release 92 - 1992-04-25 18:17:03 -0000 5127 [tz92.tar.Z is missing!] 5128 5129 By popular demand (well, at any rate, following a request by kre at munnari) 5130 5131 5132 The 1989 update of the time zone package featured: 5133 5134 * POSIXization (including interpretation of POSIX-style TZ environment 5135 variables, provided by Guy Harris), 5136 * ANSIfication (including versions of "mktime" and "difftime"), 5137 * SVIDulation (an "altzone" variable) 5138 * MACHination (the "gtime" function) 5139 * corrections to some time zone data (including corrections to the rules 5140 for Great Britain and New Zealand) 5141 * reference data from the United States Naval Observatory for folks who 5142 want to do additional time zones 5143 * and the 1989 data for Saudi Arabia. 5144 5145 (Since this code will be treated as "part of the implementation" in some 5146 places and as "part of the application" in others, there's no good way to 5147 name functions, such as timegm, that are not part of the proposed ANSI C 5148 standard; such functions have kept their old, underscore-free names in this 5149 update.) 5150 5151 And the "dysize" function has disappeared; it was present to allow 5152 compilation of the "date" command on old BSD systems, and a version of "date" 5153 is now provided in the package. The "date" command is not created when you 5154 "make all" since it may lack options provided by the version distributed with 5155 your operating system, or may not interact with the system in the same way 5156 the native version does. 5157 5158 Since POSIX frowns on correct leap second handling, the default behavior of 5159 the "zic" command (in the absence of a "-L" option) has been changed to omit 5160 leap second information from its output files. 5161 5162 5163 ----- 5164 Notes 5165 5166 This file contains copies of the part of each release announcement 5167 that talks about the changes in that release. The text has been 5168 adapted and reformatted for the purposes of this file. 5169 5170 Traditionally a release R consists of a pair of tarball files, 5171 tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g., 5172 code2010a, data2012c) consist of just one or the other tarball, and a 5173 few (e.g., code2012c-data2012d) have tarballs with mixed version 5174 numbers. Recent releases also come in an experimental format 5175 consisting of a single tarball tzdb-R.tar.lz with extra data. 5176 5177 Release timestamps are taken from the release's commit (for newer, 5178 Git-based releases), from the newest file in the tarball (for older 5179 releases, where this info is available) or from the email announcing 5180 the release (if all else fails; these are marked with a time zone 5181 abbreviation of -0000 and an "is missing!" comment). 5182 5183 Earlier versions of the code and data were not announced on the tz 5184 list and are not summarized here. 5185 5186 This file is in the public domain. 5187 5188 Local Variables: 5189 coding: utf-8 5190 End: 5191
Indexes created Mon Sep 29 21:09:56 GMT 2025