NEWS revision 1.32
1 News for the tz database 2 3 Release 2020c - 2020-10-16 11:15:53 -0700 4 5 Briefly: 6 Fiji starts DST later than usual, on 2020-12-20. 7 8 Changes to future timestamps 9 10 Fiji will start DST on 2020-12-20, instead of 2020-11-08 as 11 previously predicted. DST will still end on 2021-01-17. 12 (Thanks to Raymond Kumar and Alan Mintz.) Assume for now that 13 the later-than-usual start date is a one-time departure from the 14 recent pattern. 15 16 Changes to build procedure 17 18 Rearguard tarballs now contain an empty file pacificnew. 19 Some older downstream software expects this file to exist. 20 (Problem reported by Mike Cullinan.) 21 22 23 Release 2020b - 2020-10-06 18:35:04 -0700 24 25 Briefly: 26 Revised predictions for Morocco's changes starting in 2023. 27 Canada's Yukon changes to -07 on 2020-11-01, not 2020-03-08. 28 Macquarie Island has stayed in sync with Tasmania since 2011. 29 Casey, Antarctica is at +08 in winter and +11 in summer. 30 zic no longer supports -y, nor the TYPE field of Rules. 31 32 Changes to future timestamps 33 34 Morocco's spring-forward after Ramadan is now predicted to occur 35 no sooner than two days after Ramadan, instead of one day. 36 (Thanks to Milamber.) The first altered prediction is for 2023, 37 now predicted to spring-forward on April 30 instead of April 23. 38 39 Changes to past and future timestamps 40 41 Casey Station, Antarctica has been using +08 in winter and +11 in 42 summer since 2018. The most recent transition from +08 to +11 was 43 2020-10-04 00:01. Also, Macquarie Island has been staying in 44 sync with Tasmania since 2011. (Thanks to Steffen Thorsen.) 45 46 Changes to past and future time zone abbreviations and DST flags 47 48 Canada's Yukon, represented by America/Whitehorse and 49 America/Dawson, changes its time zone rules from -08/-07 to 50 permanent -07 on 2020-11-01, not on 2020-03-08 as 2020a had it. 51 This change affects only the time zone abbreviation (MST vs PDT) 52 and daylight saving flag for the period between the two dates. 53 (Thanks to Andrew G. Smith.) 54 55 Changes to past timestamps 56 57 Correct several transitions for Hungary for 1918/1983. 58 For example, the 1983-09-25 fall-back was at 01:00, not 03:00. 59 (Thanks to Gza Nyry.) Also, the 1890 transition to standard 60 time was on 11-01, not 10-01 (thanks to Michael Deckers). 61 62 The 1891 French transition was on March 16, not March 15. The 63 1911-03-11 French transition was at midnight, not a minute later. 64 Monaco's transitions were on 1892-06-01 and 1911-03-29, not 65 1891-03-15 and 1911-03-11. (Thanks to Michael Deckers.) 66 67 Changes to code 68 69 Support for zic's long-obsolete '-y YEARISTYPE' option has been 70 removed and, with it, so has support for the TYPE field in Rule 71 lines, which is now reserved for compatibility with earlier zic. 72 These features were previously deprecated in release 2015f. 73 (Thanks to Tim Parenti.) 74 75 zic now defaults to '-b slim' instead of to '-b fat'. 76 77 zic's new '-l -' and '-p -' options uninstall any existing 78 localtime and posixrules files, respectively. 79 80 The undocumented and ineffective tzsetwall function has been 81 removed. 82 83 Changes to build procedure 84 85 The Makefile now defaults POSIXRULES to '-', so the posixrules 86 feature (obsolete as of 2019b) is no longer installed by default. 87 88 Changes to documentation and commentary 89 90 The long-obsolete files pacificnew, systemv, and yearistype.sh have 91 been removed from the distribution. (Thanks to Tim Parenti.) 92 93 94 Release 2020a - 2020-04-23 16:03:47 -0700 95 96 Briefly: 97 Morocco springs forward on 2020-05-31, not 2020-05-24. 98 Canada's Yukon advanced to -07 year-round on 2020-03-08. 99 America/Nuuk renamed from America/Godthab. 100 zic now supports expiration dates for leap second lists. 101 102 Changes to future timestamps 103 104 Morocco's second spring-forward transition in 2020 will be May 31, 105 not May 24 as predicted earlier. (Thanks to Semlali Naoufal.) 106 Adjust future-year predictions to use the first Sunday after the 107 day after Ramadan, not the first Sunday after Ramadan. 108 109 Canada's Yukon, represented by America/Whitehorse and 110 America/Dawson, advanced to -07 year-round, beginning with its 111 spring-forward transition on 2020-03-08, and will not fall back on 112 2020-11-01. Although a government press release calls this 113 "permanent Pacific Daylight Saving Time", we prefer MST for 114 consistency with nearby Dawson Creek, Creston, and Fort Nelson. 115 (Thanks to Tim Parenti.) 116 117 Changes to past timestamps 118 119 Shanghai observed DST in 1919. (Thanks to Phake Nick.) 120 121 Changes to timezone identifiers 122 123 To reflect current usage in English better, America/Godthab has 124 been renamed to America/Nuuk. A backwards-compatibility link 125 remains for the old name. 126 127 Changes to code 128 129 localtime.c no longer mishandles timestamps after the last 130 transition in a TZif file with leap seconds and with daylight 131 saving time transitions projected into the indefinite future. 132 For example, with TZ='America/Los_Angeles' with leap seconds, 133 zdump formerly reported a DST transition on 2038-03-14 134 from 01:59:32.999... to 02:59:33 instead of the correct transition 135 from 01:59:59.999... to 03:00:00. 136 137 zic -L now supports an Expires line in the leapseconds file, and 138 truncates the TZif output accordingly. This propagates leap 139 second expiration information into the TZif file, and avoids the 140 abovementioned localtime.c bug as well as similar bugs present in 141 many client implementations. If no Expires line is present, zic 142 -L instead truncates the TZif output based on the #expires comment 143 present in leapseconds files distributed by tzdb 2018f and later; 144 however, this usage is obsolescent. For now, the distributed 145 leapseconds file has an Expires line that is commented out, so 146 that the file can be fed to older versions of zic which ignore the 147 commented-out line. Future tzdb distributions are planned to 148 contain a leapseconds file with an Expires line. 149 150 The configuration macros HAVE_TZNAME and USG_COMPAT should now be 151 set to 1 if the system library supports the feature, and 2 if not. 152 As before, these macros are nonzero if tzcode should support the 153 feature, zero otherwise. 154 155 The configuration macro ALTZONE now has the same values with the 156 same meaning as HAVE_TZNAME and USG_COMPAT. 157 158 The code's defense against CRLF in leap-seconds.list is now 159 portable to POSIX awk. (Problem reported by Deborah Goldsmith.) 160 161 Although the undocumented tzsetwall function is not changed in 162 this release, it is now deprecated in preparation for removal in 163 future releases. Due to POSIX requirements, tzsetwall has not 164 worked for some time. Any code that uses it should instead use 165 tzalloc(NULL) or, if portability trumps thread-safety, should 166 unset the TZ environment variable. 167 168 Changes to commentary 169 170 The les-de-la-Madeleine and the Listuguj reserve are noted as 171 following America/Halifax, and comments about Yukon's "south" and 172 "north" have been corrected to say "east" and "west". (Thanks to 173 Jeffery Nichols.) 174 175 176 Release 2019c - 2019-09-11 08:59:48 -0700 177 178 Briefly: 179 Fiji observes DST from 2019-11-10 to 2020-01-12. 180 Norfolk Island starts observing Australian-style DST. 181 182 Changes to future timestamps 183 184 Fiji's next DST transitions will be 2019-11-10 and 2020-01-12 185 instead of 2019-11-03 and 2020-01-19. (Thanks to Raymond Kumar.) 186 Adjust future guesses accordingly. 187 188 Norfolk Island will observe Australian-style DST starting in 189 spring 2019. The first transition is on 2019-10-06. (Thanks to 190 Kyle Czech and Michael Deckers.) 191 192 Changes to past timestamps 193 194 Many corrections to time in Turkey from 1940 through 1985. 195 (Thanks to Oya Vula via Alois Treindl, and to Kvan Yazan.) 196 197 The Norfolk Island 1975-03-02 transition was at 02:00 standard 198 time, not 02:00 DST. (Thanks to Michael Deckers.) 199 200 South Korea observed DST from 1948 through 1951. Although this 201 info was supposed to appear in release 2014j, a typo inadvertently 202 suppressed the change. (Thanks to Alois Treindl.) 203 204 Detroit observed DST in 1967 and 1968 following the US DST rules, 205 except that its 1967 DST began on June 14 at 00:01. (Thanks to 206 Alois Treindl for pointing out that the old data entries were 207 probably wrong.) 208 209 Fix several errors in pre-1970 transitions in Perry County, IN. 210 (Thanks to Alois Triendl for pointing out the 1967/9 errors.) 211 212 Edmonton did not observe DST in 1967 or 1969. In 1946 Vancouver 213 ended DST on 09-29 not 10-13, and Vienna ended DST on 10-07 not 214 10-06. In 1945 Knigsberg (now Kaliningrad) switched from +01/+02 215 to +02/+03 on 04-10 not 01-01, and its +02/+03 is abbreviated 216 EET/EEST, not CET/CEST. (Thanks to Alois Triendl.) In 1946 217 Knigsberg switched to +03 on 04-07 not 01-01. 218 219 In 1946 Louisville switched from CST to CDT on 04-28 at 00:01, not 220 01-01 at 00:00. (Thanks to Alois Treindl and Michael Deckers.) 221 Also, it switched from CST to CDT on 1950-04-30, not 1947-04-27. 222 223 The 1892-05-01 transition in Brussels was at 00:17:30, not at noon. 224 (Thanks to Michael Deckers.) 225 226 Changes to past time zone abbreviations and DST flags 227 228 Hong Kong Winter Time, observed from 1941-10-01 to 1941-12-25, 229 is now flagged as DST and is abbreviated HKWT not HKT. 230 231 Changes to code 232 233 leapseconds.awk now relies only on its input data, rather than 234 also relying on its comments. (Inspired by code from Dennis 235 Ferguson and Chris Woodbury.) 236 237 The code now defends against CRLFs in leap-seconds.list. 238 (Thanks to Brian Inglis and Chris Woodbury.) 239 240 Changes to documentation and commentary 241 242 theory.html discusses leap seconds. (Thanks to Steve Summit.) 243 244 Nashville's newspapers dueled about the time of day in the 1950s. 245 (Thanks to John Seigenthaler.) 246 247 Liechtenstein observed Swiss DST in 1941/2. 248 (Thanks to Alois Treindl.) 249 250 251 Release 2019b - 2019-07-01 00:09:53 -0700 252 253 Briefly: 254 Brazil no longer observes DST. 255 'zic -b slim' outputs smaller TZif files; please try it out. 256 Palestine's 2019 spring-forward transition was on 03-29, not 03-30. 257 258 Changes to future timestamps 259 260 Brazil has canceled DST and will stay on standard time indefinitely. 261 (Thanks to Steffen Thorsen, Marcus Diniz, and Daniel Soares de 262 Oliveira.) 263 264 Predictions for Morocco now go through 2087 instead of 2037, to 265 work around a problem on newlib when using TZif files output by 266 zic 2019a or earlier. (Problem reported by David Gauchard.) 267 268 Changes to past and future timestamps 269 270 Palestine's 2019 spring transition was 03-29 at 00:00, not 03-30 271 at 01:00. (Thanks to Sharef Mustafa and Even Scharning.) Guess 272 future transitions to be March's last Friday at 00:00. 273 274 Changes to past timestamps 275 276 Hong Kong's 1941-06-15 spring-forward transition was at 03:00, not 277 03:30. Its 1945 transition from JST to HKT was on 11-18 at 02:00, 278 not 09-15 at 00:00. In 1946 its spring-forward transition was on 279 04-21 at 00:00, not the previous day at 03:30. From 1946 through 280 1952 its fall-back transitions occurred at 04:30, not at 03:30. 281 In 1947 its fall-back transition was on 11-30, not 12-30. 282 (Thanks to P Chan.) 283 284 Changes to past time zone abbreviations 285 286 Italy's 1866 transition to Rome Mean Time was on December 12, not 287 September 22. This affects only the time zone abbreviation for 288 Europe/Rome between those dates. (Thanks to Stephen Trainor and 289 Luigi Rosa.) 290 291 Changes affecting metadata only 292 293 Add info about the Crimea situation in zone1970.tab and zone.tab. 294 (Problem reported by Serhii Demediuk.) 295 296 Changes to code 297 298 zic's new -b option supports a way to control data bloat and to 299 test for year-2038 bugs in software that reads TZif files. 300 'zic -b fat' and 'zic -b slim' generate larger and smaller output; 301 for example, changing from fat to slim shrinks the Europe/London 302 file from 3648 to 1599 bytes, saving about 56%. Fat and slim 303 files represent the same set of timestamps and use the same TZif 304 format as documented in tzfile(5) and in Internet RFC 8536. 305 Fat format attempts to work around bugs or incompatibilities in 306 older software, notably software that mishandles 64-bit TZif data 307 or uses obsolete TZ strings like "EET-2EEST" that lack DST rules. 308 Slim format is more efficient and does not work around 64-bit bugs 309 or obsolete TZ strings. Currently zic defaults to fat format 310 unless you compile with -DZIC_BLOAT_DEFAULT=\"slim\"; this 311 out-of-the-box default is intended to change in future releases 312 as the buggy software often mishandles timestamps anyway. 313 314 zic no longer treats a set of rules ending in 2037 specially. 315 Previously, zic assumed that such a ruleset meant that future 316 timestamps could not be predicted, and therefore omitted a 317 POSIX-like TZ string in the TZif output. The old behavior is no 318 longer needed for current tzdata, and caused problems with newlib 319 when used with older tzdata (reported by David Gauchard). 320 321 zic no longer generates some artifact transitions. For example, 322 Europe/London no longer has a no-op transition in January 1996. 323 324 Changes to build procedure 325 326 tzdata.zi now assumes zic 2017c or later. This shrinks tzdata.zi 327 by a percent or so. 328 329 Changes to documentation and commentary 330 331 The Makefile now documents the POSIXRULES macro as being obsolete, 332 and similarly, zic's -p POSIXRULES option is now documented as 333 being obsolete. Although the POSIXRULES feature still exists and 334 works as before, in practice it is rarely used for its intended 335 purpose, and it does not work either in the default reference 336 implementation (for timestamps after 2037) or in common 337 implementations such as GNU/Linux (for contemporary timestamps). 338 Since POSIXRULES was designed primarily as a temporary transition 339 facility for System V platforms that died off decades ago, it is 340 being decommissioned rather than institutionalized. 341 342 New info on Bonin Islands and Marcus (thanks to Wakaba and Phake Nick). 343 344 345 Release 2019a - 2019-03-25 22:01:33 -0700 346 347 Briefly: 348 Palestine "springs forward" on 2019-03-30 instead of 2019-03-23. 349 Metlakatla "fell back" to rejoin Alaska Time on 2019-01-20 at 02:00. 350 351 Changes to past and future timestamps 352 353 Palestine will not start DST until 2019-03-30, instead of 2019-03-23 as 354 previously predicted. Adjust our prediction by guessing that spring 355 transitions will be between 24 and 30 March, which matches recent practice 356 since 2016. (Thanks to Even Scharning and Tim Parenti.) 357 358 Metlakatla ended its observance of Pacific standard time, 359 rejoining Alaska Time, on 2019-01-20 at 02:00. (Thanks to Ryan 360 Stanley and Tim Parenti.) 361 362 Changes to past timestamps 363 364 Israel observed DST in 1980 (08-02/09-13) and 1984 (05-05/08-25). 365 (Thanks to Alois Treindl and Isaac Starkman.) 366 367 Changes to time zone abbreviations 368 369 Etc/UCT is now a backward-compatibility link to Etc/UTC, instead 370 of being a separate zone that generates the abbreviation "UCT", 371 which nowadays is typically a typo. (Problem reported by Isiah 372 Meadows.) 373 374 Changes to code 375 376 zic now has an -r option to limit the time range of output data. 377 For example, 'zic -r @1000000000' limits the output data to 378 timestamps starting 1000000000 seconds after the Epoch. 379 This helps shrink output size and can be useful for applications 380 not needing the full timestamp history, such as TZDIST truncation; 381 see Internet RFC 8536 section 5.1. (Inspired by a feature request 382 from Christopher Wong, helped along by bug reports from Wong and 383 from Tim Parenti.) 384 385 Changes to documentation 386 387 Mention Internet RFC 8536 (February 2019), which documents TZif. 388 389 tz-link.html now cites tzdata-meta 390 <https://tzdata-meta.timtimeonline.com/>. 391 392 393 Release 2018i - 2018-12-30 11:05:43 -0800 394 395 Briefly: 396 So Tom and Prncipe switches from +01 to +00 on 2019-01-01. 397 398 Changes to future timestamps 399 400 Due to a change in government, So Tom and Prncipe switches back 401 from +01 to +00 on 2019-01-01 at 02:00. (Thanks to Vadim 402 Nasardinov and Michael Deckers.) 403 404 405 Release 2018h - 2018-12-23 17:59:32 -0800 406 407 Briefly: 408 Qyzylorda, Kazakhstan moved from +06 to +05 on 2018-12-21. 409 New zone Asia/Qostanay because Qostanay, Kazakhstan didn't move. 410 Metlakatla, Alaska observes PST this winter only. 411 Guess Morocco will continue to adjust clocks around Ramadan. 412 Add predictions for Iran from 2038 through 2090. 413 414 Changes to future timestamps 415 416 Guess that Morocco will continue to fall back just before and 417 spring forward just after Ramadan, the practice since 2012. 418 (Thanks to Maamar Abdelkader.) This means Morocco will observe 419 negative DST during Ramadan in main and vanguard formats, and in 420 rearguard format it stays in the +00 timezone and observes 421 ordinary DST in all months other than Ramadan. As before, extend 422 this guesswork to the year 2037. As a consequence, Morocco is 423 scheduled to observe three DST transitions in some Gregorian years 424 (e.g., 2033) due to the mismatch between the Gregorian and Islamic 425 calendars. 426 427 The table of exact transitions for Iranian DST has been extended. 428 It formerly cut off before the year 2038 in a nod to 32-bit time_t. 429 It now cuts off before 2091 as there is doubt about how the Persian 430 calendar will treat 2091. This change predicts DST transitions in 431 2038-9, 2042-3, and 2046-7 to occur one day later than previously 432 predicted. As before, post-cutoff transitions are approximated. 433 434 Changes to past and future timestamps 435 436 Qyzylorda (aka Kyzylorda) oblast in Kazakhstan moved from +06 to 437 +05 on 2018-12-21. This is a zone split as Qostanay (aka 438 Kostanay) did not switch, so create a zone Asia/Qostanay. 439 440 Metlakatla moved from Alaska to Pacific standard time on 2018-11-04. 441 It did not change clocks that day and remains on -08 this winter. 442 (Thanks to Ryan Stanley.) It will revert to the usual Alaska 443 rules next spring, so this change affects only timestamps 444 from 2018-11-04 through 2019-03-10. 445 446 Change to past timestamps 447 448 Kwajalein's 1993-08-20 transition from -12 to +12 was at 24:00, 449 not 00:00. I transcribed the time incorrectly from Shanks. 450 (Thanks to Phake Nick.) 451 452 Nauru's 1979 transition was on 02-10 at 02:00, not 05-01 at 00:00. 453 (Thanks to Phake Nick.) 454 455 Guam observed DST irregularly from 1959 through 1977. 456 (Thanks to Phake Nick.) 457 458 Hong Kong observed DST in 1941 starting 06-15 (not 04-01), then on 459 10-01 changed standard time to +08:30 (not +08). Its transition 460 back to +08 after WWII was on 1945-09-15, not the previous day. 461 Its 1904-10-30 change took effect at 01:00 +08 (not 00:00 LMT). 462 (Thanks to Phake Nick, Steve Allen, and Joseph Myers.) Also, 463 its 1952 fallback was on 11-02 (not 10-25). 464 465 This release contains many changes to timestamps before 1946 due 466 to Japanese possession or occupation of Pacific/Chuuk, 467 Pacific/Guam, Pacific/Kosrae, Pacific/Kwajalein, Pacific/Majuro, 468 Pacific/Nauru, Pacific/Palau, and Pacific/Pohnpei. 469 (Thanks to Phake Nick.) 470 471 Assume that the Spanish East Indies was like the Philippines and 472 observed American time until the end of 1844. This affects 473 Pacific/Chuuk, Pacific/Kosrae, Pacific/Palau, and Pacific/Pohnpei. 474 475 Changes to past tm_isdst flags 476 477 For the recent Morocco change, the tm_isdst flag should be 1 from 478 2018-10-27 00:00 to 2018-10-28 03:00. (Thanks to Michael Deckers.) 479 Give a URL to the official decree. (Thanks to Matt Johnson.) 480 481 482 Release 2018g - 2018-10-26 22:22:45 -0700 483 484 Briefly: 485 Morocco switches to permanent +01 on 2018-10-28. 486 487 Changes to future timestamps 488 489 Morocco switches from +00/+01 to permanent +01 effective 2018-10-28, 490 so its clocks will not fall back as previously scheduled. 491 (Thanks to Mohamed Essedik Najd and Brian Inglis.) 492 493 Changes to code 494 495 When generating TZif files with leap seconds, zic no longer uses a 496 format that trips up older 32-bit clients, fixing a bug introduced 497 in 2018f. (Reported by Daniel Fischer.) Also, the zic workaround 498 for QTBUG-53071 now also works for TZif files with leap seconds. 499 500 The translator to rearguard format now rewrites the line 501 "Rule Japan 1948 1951 - Sep Sat>=8 25:00 0 S" to 502 "Rule Japan 1948 1951 - Sep Sun>=9 1:00 0 S". 503 This caters to zic before 2007 and to Oracle TZUpdater 2.2.0 504 and earlier. (Reported by Christos Zoulas.) 505 506 Changes to past time zone abbreviations 507 508 Change HDT to HWT/HPT for WWII-era abbreviations in Hawaii. 509 This reverts to 2011h, as the abbreviation change in 2011i was 510 likely inadvertent. 511 512 Changes to documentation 513 514 tzfile.5 has new sections on interoperability issues. 515 516 517 Release 2018f - 2018-10-18 00:14:18 -0700 518 519 Briefly: 520 Volgograd moves from +03 to +04 on 2018-10-28. 521 Fiji ends DST 2019-01-13, not 2019-01-20. 522 Most of Chile changes DST dates, effective 2019-04-06. 523 524 Changes to future timestamps 525 526 Volgograd moves from +03 to +04 on 2018-10-28 at 02:00. 527 (Thanks to Alexander Fetisov and Stepan Golosunov.) 528 529 Fiji ends DST 2019-01-13 instead of the 2019-01-20 previously 530 predicted. (Thanks to Raymond Kumar.) Adjust future predictions 531 accordingly. 532 533 Most of Chile will end DST on the first Saturday in April at 24:00 mainland 534 time, and resume DST on the first Saturday in September at 24:00 mainland 535 time. The changes are effective from 2019-04-06, and do not affect the 536 Magallanes region modeled by America/Punta_Arenas. (Thanks to Juan Correa 537 and Tim Parenti.) Adjust future predictions accordingly. 538 539 Changes to past timestamps 540 541 The 2018-05-05 North Korea 30-minute time zone change took place 542 at 23:30 the previous day, not at 00:00 that day. 543 544 China's 1988 spring-forward transition was on April 17, not 545 April 10. Its DST transitions in 1986/91 were at 02:00, not 00:00. 546 (Thanks to P Chan.) 547 548 Fix several issues for Macau before 1992. Macau's pre-1904 LMT 549 was off by 10 s. Macau switched to +08 in 1904 not 1912, and 550 temporarily switched to +09/+10 during World War II. Macau 551 observed DST in 1942/79, not 1961/80, and there were several 552 errors for transition times and dates. (Thanks to P Chan.) 553 554 The 1948-1951 fallback transitions in Japan were at 25:00 on 555 September's second Saturday, not at 24:00. (Thanks to Phake Nick.) 556 zic turns this into 01:00 on the day after September's second 557 Saturday, which is the best that POSIX or C platforms can do. 558 559 Incorporate 1940-1949 Asia/Shanghai DST transitions from a 2014 560 paper by Li Yu, replacing more-questionable data from Shanks. 561 562 Changes to time zone abbreviations 563 564 Use "PST" and "PDT" for Philippine time. (Thanks to Paul Goyette.) 565 566 Changes to code 567 568 zic now always generates TZif files where time type 0 is used for 569 timestamps before the first transition. This simplifies the 570 reading of TZif files and should not affect behavior of existing 571 TZif readers because the same set of time types is used; only 572 their internal indexes may have changed. This affects only the 573 legacy zones EST5EDT, CST6CDT, MST7MDT, PST8PDT, CET, MET, and 574 EET, which previously used nonzero types for these timestamps. 575 576 Because of the type 0 change, zic no longer outputs a dummy 577 transition at time -2**59 (before the Big Bang), as clients should 578 no longer need this to handle historical timestamps correctly. 579 This reverts a change introduced in 2013d and shrinks most TZif 580 files by a few bytes. 581 582 zic now supports negative time-of-day in Rule and Leap lines, e.g., 583 "Rule X min max - Apr lastSun -6:00 1:00 -" means the transition 584 occurs at 18:00 on the Saturday before the last Sunday in April. 585 This behavior was documented in 2018a but the code did not 586 entirely match the documentation. 587 588 localtime.c no longer requires at least one time type in TZif 589 files that lack transitions or have a POSIX-style TZ string. This 590 future-proofs the code against possible future extensions to the 591 format that would allow TZif files with POSIX-style TZ strings and 592 without transitions or time types. 593 594 A read-access subscript error in localtime.c has been fixed. 595 It could occur only in TZif files with timecnt == 0, something that 596 does not happen in practice now but could happen in future versions. 597 598 localtime.c no longer ignores TZif POSIX-style TZ strings that 599 specify only standard time. Instead, these TZ strings now 600 override the default time type for timestamps after the last 601 transition (or for all timestamps if there are no transitions), 602 just as DST strings specifying DST have always done. 603 604 leapseconds.awk now outputs "#updated" and "#expires" comments, 605 and supports leap seconds at the ends of months other than June 606 and December. (Inspired by suggestions from Chris Woodbury.) 607 608 Changes to documentation 609 610 New restrictions: A Rule name must start with a character that 611 is neither an ASCII digit nor "-" nor "+", and an unquoted name 612 should not use characters in the set "!$%&'()*,/:;<=>?@[\]^`{|}~". 613 The latter restriction makes room for future extensions (a 614 possibility noted by Tom Lane). 615 616 tzfile.5 now documents what time types apply before the first and 617 after the last transition, if any. 618 619 Documentation now uses the spelling "timezone" for a TZ setting 620 that determines timestamp history, and "time zone" for a 621 geographic region currently sharing the same standard time. 622 623 The name "TZif" is now used for the tz binary data format. 624 625 tz-link.htm now mentions the A0 TimeZone Migration utilities. 626 (Thanks to Aldrin Martoq for the link.) 627 628 Changes to build procedure 629 630 New 'make' target 'rearguard_tarballs' to build the rearguard 631 tarball only. This is a convenience on platforms that lack lzip 632 if you want to build the rearguard tarball. (Problem reported by 633 Deborah Goldsmith.) 634 635 tzdata.zi is now more stable from release to release. (Problem 636 noted by Tom Lane.) It is also a bit shorter. 637 638 tzdata.zi now can contain comment lines documenting configuration 639 information, such as which data format was selected, which input 640 files were used, and how leap seconds are treated. (Problems 641 noted by Lester Caine and Brian Inglis.) If the Makefile defaults 642 are used these comment lines are absent, for backward 643 compatibility. A redistributor intending to alter its copy of the 644 files should also append "-LABEL" to the 'version' file's first 645 line, where "LABEL" identifies the redistributor's change. 646 647 648 Release 2018e - 2018-05-01 23:42:51 -0700 649 650 Briefly: 651 652 North Korea switches back to +09 on 2018-05-05. 653 The main format uses negative DST again, for Ireland etc. 654 'make tarballs' now also builds a rearguard tarball. 655 New 's' and 'd' suffixes in SAVE columns of Rule and Zone lines. 656 657 Changes to past and future timestamps 658 659 North Korea switches back from +0830 to +09 on 2018-05-05. 660 (Thanks to Kang Seonghoon, Arthur David Olson, Seo Sanghyeon, 661 and Tim Parenti.) 662 663 Bring back the negative-DST changes of 2018a, except be more 664 compatible with data parsers that do not support negative DST. 665 Also, this now affects historical timestamps in Namibia and the 666 former Czechoslovakia, not just Ireland. The main format now uses 667 negative DST to model timestamps in Europe/Dublin (from 1971 on), 668 Europe/Prague (1946/7), and Africa/Windhoek (1994/2017). This 669 does not affect UT offsets, only time zone abbreviations and the 670 tm_isdst flag. Also, this does not affect rearguard or vanguard 671 formats; effectively the main format now uses vanguard instead of 672 rearguard format. Data parsers that do not support negative DST 673 can still use data from the rearguard tarball described below. 674 675 Changes to build procedure 676 677 The command 'make tarballs' now also builds the tarball 678 tzdataVERSION-rearguard.tar.gz, which is like tzdataVERSION.tar.gz 679 except that it uses rearguard format intended for trailing-edge 680 data parsers. 681 682 Changes to data format and to code 683 684 The SAVE column of Rule and Zone lines can now have an 's' or 'd' 685 suffix, which specifies whether the adjusted time is standard time 686 or daylight saving time. If no suffix is given, daylight saving 687 time is used if and only if the SAVE column is nonzero; this is 688 the longstanding behavior. Although this new feature is not used 689 in tzdata, it could be used to specify the legal time in Namibia 690 1994-2017, as opposed to the popular time (see below). 691 692 Changes to past timestamps 693 694 From 1994 through 2017 Namibia observed DST in winter, not summer. 695 That is, it used negative DST, as Ireland still does. This change 696 does not affect UTC offsets; it affects only the tm_isdst flag and 697 the abbreviation used during summer, which is now CAT, not WAST. 698 Although (as noted by Michael Deckers) summer and winter time were 699 both simply called "standard time" in Namibian law, in common 700 practice winter time was considered to be DST (as noted by Stephen 701 Colebourne). The full effect of this change is only in vanguard 702 and main format; in rearguard format, the tm_isdst flag is still 703 zero in winter and nonzero in summer. 704 705 In 1946/7 Czechoslovakia also observed negative DST in winter. 706 The full effect of this change is only in vanguard and main 707 formats; in rearguard format, it is modeled as plain GMT without 708 daylight saving. Also, the dates of some 1944/5 DST transitions 709 in Czechoslovakia have been changed. 710 711 712 Release 2018d - 2018-03-22 07:05:46 -0700 713 714 Briefly: 715 716 Palestine starts DST a week earlier in 2018. 717 Add support for vanguard and rearguard data consumers. 718 Add subsecond precision to source data format, though not to data. 719 720 Changes to future timestamps 721 722 In 2018, Palestine starts DST on March 24, not March 31. 723 Adjust future predictions accordingly. (Thanks to Sharef Mustafa.) 724 725 Changes to past and future timestamps 726 727 Casey Station in Antarctica changed from +11 to +08 on 2018-03-11 728 at 04:00. (Thanks to Steffen Thorsen.) 729 730 Changes to past timestamps 731 732 Historical transitions for Uruguay, represented by 733 America/Montevideo, have been updated per official legal documents, 734 replacing previous data mainly originating from the inventions of 735 Shanks & Pottenger. This has resulted in adjustments ranging from 736 30 to 90 minutes in either direction over at least two dozen 737 distinct periods ranging from one day to several years in length. 738 A mere handful of pre-1991 transitions are unaffected; data since 739 then has come from more reliable contemporaneous reporting. These 740 changes affect various timestamps in 1920-1923, 1936, 1939, 741 1942-1943, 1959, 1966-1970, 1972, 1974-1980, and 1988-1990. 742 Additionally, Uruguay's pre-standard-time UT offset has been 743 adjusted westward by 7 seconds, from UT-03:44:44 to UT-03:44:51, to 744 match the location of the Observatory of the National Meteorological 745 Institute in Montevideo. 746 (Thanks to Jeremie Bonjour, Tim Parenti, and Michael Deckers.) 747 748 Enderbury and Kiritimati skipped New Year's Eve 1994, not 749 New Year's Day 1995. (Thanks to Kerry Shetline.) 750 751 Fix the 1912-01-01 transition for Portugal and its colonies. 752 This transition was at 00:00 according to the new UT offset, not 753 according to the old one. Also assume that Cape Verde switched on 754 the same date as the rest, not in 1907. This affects 755 Africa/Bissau, Africa/Sao_Tome, Asia/Macau, Atlantic/Azores, 756 Atlantic/Cape_Verde, Atlantic/Madeira, and Europe/Lisbon. 757 (Thanks to Michael Deckers.) 758 759 Fix an off-by-1 error for pre-1913 timestamps in Jamaica and in 760 Turks & Caicos. 761 762 Changes to past time zone abbreviations 763 764 MMT took effect in Uruguay from 1908-06-10, not 1898-06-28. There 765 is no clock change associated with the transition. 766 767 Changes to build procedure 768 769 The new DATAFORM macro in the Makefile lets the installer choose 770 among three source data formats. The idea is to lessen downstream 771 disruption when data formats are improved. 772 773 * DATAFORM=vanguard installs from the latest, bleeding-edge 774 format. DATAFORM=main (the default) installs from the format 775 used in the 'africa' etc. files. DATAFORM=rearguard installs 776 from a trailing-edge format. Eventually, elements of today's 777 vanguard format should move to the main format, and similarly 778 the main format's features should eventually move to the 779 rearguard format. 780 781 * In the current version, the main and rearguard formats are 782 identical and match that of 2018c, so this change does not 783 affect default behavior. The vanguard format currently contains 784 one feature not in the main format: negative SAVE values. This 785 improves support for Ireland, which uses Irish Standard Time 786 (IST, UTC+01) in summer and GMT (UTC) in winter. tzcode has 787 supported negative SAVE values for decades, and this feature 788 should move to the main format soon. However, it will not move 789 to the rearguard format for quite some time because some 790 downstream parsers do not support it. 791 792 * The build procedure constructs three files vanguard.zi, main.zi, 793 and rearguard.zi, one for each format. Although the files 794 represent essentially the same data, they may have minor 795 discrepancies that users are not likely to notice. The files 796 are intended for downstream data consumers and are not 797 installed. Zoneinfo parsers that do not support negative SAVE values 798 should start using rearguard.zi, so that they will be unaffected 799 when the negative-DST feature moves from vanguard to main. 800 Bleeding-edge Zoneinfo parsers that support the new features 801 already can use vanguard.zi; in this respect, current tzcode is 802 bleeding-edge. 803 804 The Makefile should now be safe for parallelized builds, and 'make 805 -j to2050new.tzs' is now much faster on a multiprocessor host 806 with GNU Make. 807 808 When built with -DSUPPRESS_TZDIR, the tzcode library no longer 809 prepends TZDIR/ to file names that do not begin with '/'. This is 810 not recommended for general use, due to its security implications. 811 (From a suggestion by Manuela Friedrich.) 812 813 Changes to code 814 815 zic now accepts subsecond precision in expressions like 816 00:19:32.13, which is approximately the legal time of the 817 Netherlands from 1835 to 1937. However, because it is 818 questionable whether the few recorded uses of non-integer offsets 819 had subsecond precision in practice, there are no plans for tzdata 820 to use this feature. (Thanks to Steve Allen for pointing out 821 the limitations of historical data in this area.) 822 823 The code is a bit more portable to MS-Windows. Installers can 824 compile with -DRESERVE_STD_EXT_IDS on MS-Windows platforms that 825 reserve identifiers like 'localtime'. (Thanks to Manuela 826 Friedrich.) 827 828 Changes to documentation and commentary 829 830 theory.html now outlines tzdb's extensions to POSIX's model for 831 civil time, and has a section "POSIX features no longer needed" 832 that lists POSIX API components that are now vestigial. 833 (From suggestions by Steve Summit.) It also better distinguishes 834 time zones from tz regions. (From a suggestion by Guy Harris.) 835 836 Commentary is now more consistent about using the phrase "daylight 837 saving time", to match the C name tm_isdst. Daylight saving time 838 need not occur in summer, and need not have a positive offset from 839 standard time. 840 841 Commentary about historical transitions in Uruguay has been expanded 842 with links to many relevant legal documents. 843 (Thanks to Tim Parenti.) 844 845 Commentary now uses some non-ASCII characters with Unicode value 846 less than U+0100, as they can be useful and should work even with 847 older editors such as XEmacs. 848 849 850 Release 2018c - 2018-01-22 23:00:44 -0800 851 852 Briefly: 853 Revert Irish changes that relied on negative SAVE values. 854 855 Changes to tm_isdst 856 857 Revert the 2018a change to Europe/Dublin. As before, this change 858 does not affect UT offsets or abbreviations; it affects only 859 whether timestamps are considered to be standard time or 860 daylight-saving time, as expressed in the tm_isdst flag of C's 861 struct tm type. This reversion is intended to be a temporary 862 workaround for problems discovered with downstream uses of 863 releases 2018a and 2018b, which implemented Irish time by using 864 negative SAVE values in the Eire rules of the 'europe' file. 865 Although negative SAVE values have been part of tzcode for many 866 years and are supported by many platforms, they were not 867 documented before 2018a and ICU and OpenJDK do not currently 868 support them. A mechanism to export data to platforms lacking 869 support for negative DST is planned to be developed before the 870 change is reapplied. (Problems reported by Deborah Goldsmith and 871 Stephen Colebourne.) 872 873 Changes to past timestamps 874 875 Japanese DST transitions (1948-1951) were Sundays at 00:00, not 876 Saturdays or Sundays at 02:00. (Thanks to Takayuki Nikai.) 877 878 Changes to build procedure 879 880 The build procedure now works around mawk 1.3.3's lack of support 881 for character class expressions. (Problem reported by Ohyama.) 882 883 884 Release 2018b - 2018-01-17 23:24:48 -0800 885 886 Briefly: 887 Fix a packaging problem in tz2018a, which was missing 'pacificnew'. 888 889 Changes to build procedure 890 891 The distribution now contains the file 'pacificnew' again. 892 This file was inadvertantly omitted in the 2018a distribution. 893 (Problem reported by Matias Fonzo.) 894 895 896 Release 2018a - 2018-01-12 22:29:21 -0800 897 898 Briefly: 899 So Tom and Prncipe switched from +00 to +01. 900 Brazil's DST will now start on November's first Sunday. 901 Ireland's standard time is now in the summer, not the winter. 902 Use Debian-style installation locations, instead of 4.3BSD-style. 903 New zic option -t. 904 905 Changes to past and future timestamps 906 907 So Tom and Prncipe switched from +00 to +01 on 2018-01-01 at 908 01:00. (Thanks to Steffen Thorsen and Michael Deckers.) 909 910 Changes to future timestamps 911 912 Starting in 2018 southern Brazil will begin DST on November's 913 first Sunday instead of October's third Sunday. (Thanks to 914 Steffen Thorsen.) 915 916 Changes to past timestamps 917 918 A discrepancy of 4 s in timestamps before 1931 in South Sudan has 919 been corrected. The 'backzone' and 'zone.tab' files did not agree 920 with the 'africa' and 'zone1970.tab' files. (Problem reported by 921 Michael Deckers.) 922 923 The abbreviation invented for Bolivia Summer Time (1931-2) is now 924 BST instead of BOST, to be more consistent with the convention 925 used for Latvian Summer Time (1918-9) and for British Summer Time. 926 927 Changes to tm_isdst 928 929 Change Europe/Dublin so that it observes Irish Standard Time (UT 930 +01) in summer and GMT (as negative daylight-saving) in winter, 931 instead of observing standard time (GMT) in winter and Irish 932 Summer Time (UT +01) in summer. This change does not affect UT 933 offsets or abbreviations; it affects only whether timestamps are 934 considered to be standard time or daylight-saving time, as 935 expressed in the tm_isdst flag of C's struct tm type. 936 (Discrepancy noted by Derick Rethans.) 937 938 Changes to build procedure 939 940 The default installation locations have been changed to mostly 941 match Debian circa 2017, instead of being designed as an add-on to 942 4.3BSD circa 1986. This affects the Makefile macros TOPDIR, 943 TZDIR, MANDIR, and LIBDIR. New Makefile macros TZDEFAULT, USRDIR, 944 USRSHAREDIR, BINDIR, ZDUMPDIR, and ZICDIR let installers tailor 945 locations more precisely. (This responds to suggestions from 946 Brian Inglis and from Steve Summit.) 947 948 The default installation procedure no longer creates the 949 backward-compatibility link US/Pacific-New, which causes 950 confusion during user setup (e.g., see Debian bug 815200). 951 Use 'make BACKWARD="backward pacificnew"' to create the link 952 anyway, for now. Eventually we plan to remove the link entirely. 953 954 tzdata.zi now contains a version-number comment. 955 (Suggested by Tom Lane.) 956 957 The Makefile now quotes values like BACKWARD more carefully when 958 passing them to the shell. (Problem reported by Zefram.) 959 960 Builders no longer need to specify -DHAVE_SNPRINTF on platforms 961 that have snprintf and use pre-C99 compilers. (Problem reported 962 by Jon Skeet.) 963 964 Changes to code 965 966 zic has a new option -t FILE that specifies the location of the 967 file that determines local time when TZ is unset. The default for 968 this location can be configured via the new TZDEFAULT makefile 969 macro, which defaults to /etc/localtime. 970 971 Diagnostics and commentary now distinguish UT from UTC more 972 carefully; see theory.html for more information about UT vs UTC. 973 974 zic has been ported to GCC 8's -Wstringop-truncation option. 975 (Problem reported by Martin Sebor.) 976 977 Changes to documentation and commentary 978 979 The zic man page now documents the longstanding behavior that 980 times and years can be out of the usual range, with negative times 981 counting backwards from midnight and with year 0 preceding year 1. 982 (Problem reported by Michael Deckers.) 983 984 The theory.html file now mentions the POSIX limit of six chars 985 per abbreviation, and lists alphabetic abbreviations used. 986 987 The files tz-art.htm and tz-link.htm have been renamed to 988 tz-art.html and tz-link.html, respectively, for consistency with 989 other file names and to simplify web server configuration. 990 991 992 Release 2017c - 2017-10-20 14:49:34 -0700 993 994 Briefly: 995 Northern Cyprus switches from +03 to +02/+03 on 2017-10-29. 996 Fiji ends DST 2018-01-14, not 2018-01-21. 997 Namibia switches from +01/+02 to +02 on 2018-04-01. 998 Sudan switches from +03 to +02 on 2017-11-01. 999 Tonga likely switches from +13/+14 to +13 on 2017-11-05. 1000 Turks & Caicos switches from -04 to -05/-04 on 2018-11-04. 1001 A new file tzdata.zi now holds a small text copy of all data. 1002 The zic input format has been regularized slightly. 1003 1004 Changes to future timestamps 1005 1006 Northern Cyprus has decided to resume EU rules starting 1007 2017-10-29, thus reinstituting winter time. 1008 1009 Fiji ends DST 2018-01-14 instead of the 2018-01-21 previously 1010 predicted. (Thanks to Dominic Fok.) Adjust future predictions 1011 accordingly. 1012 1013 Namibia will switch from +01 with DST to +02 all year on 1014 2017-09-03 at 02:00. This affects UT offsets starting 2018-04-01 1015 at 02:00. (Thanks to Steffen Thorsen.) 1016 1017 Sudan will switch from +03 to +02 on 2017-11-01. (Thanks to Ahmed 1018 Atyya and Yahia Abdalla.) South Sudan is not switching, so 1019 Africa/Juba is no longer a link to Africa/Khartoum. 1020 1021 Tonga has likely ended its experiment with DST, and will not 1022 adjust its clocks on 2017-11-05. Although Tonga has not announced 1023 whether it will continue to observe DST, the IATA is assuming that 1024 it will not. (Thanks to David Wade.) 1025 1026 Turks & Caicos will switch from -04 all year to -05 with US DST on 1027 2018-03-11 at 03:00. This affects UT offsets starting 2018-11-04 1028 at 02:00. (Thanks to Steffen Thorsen.) 1029 1030 Changes to past timestamps 1031 1032 Namibia switched from +02 to +01 on 1994-03-21, not 1994-04-03. 1033 (Thanks to Arthur David Olson.) 1034 1035 Detroit did not observe DST in 1967. 1036 1037 Use railway time for Asia/Kolkata before 1941, by switching to 1038 Madras local time (UT +052110) in 1870, then to IST (UT +0530) in 1039 1906. Also, treat 1941-2's +0630 as DST, like 1942-5. 1040 1041 Europe/Dublin's 1946 and 1947 fallback transitions occurred at 1042 02:00 standard time, not 02:00 DST. (Thanks to Michael Deckers.) 1043 1044 Pacific/Apia and Pacific/Pago_Pago switched from Antipodean to 1045 American time in 1892, not 1879. (Thanks to Michael Deckers.) 1046 1047 Adjust the 1867 transition in Alaska to better reflect the 1048 historical record, by changing it to occur on 1867-10-18 at 15:30 1049 Sitka time rather than at the start of 1867-10-17 local time. 1050 Although strictly speaking this is accurate only for Sitka, 1051 the rest of Alaska's blanks need to be filled in somehow. 1052 1053 Fix off-by-one errors in UT offsets for Adak and Nome before 1867. 1054 (Thanks to Michael Deckers.) 1055 1056 Add 7 s to the UT offset in Asia/Yangon before 1920. 1057 1058 Changes to zone names 1059 1060 Remove Canada/East-Saskatchewan from the 'backward' file, as it 1061 exceeded the 14-character limit and was an unused misnomer anyway. 1062 1063 Changes to build procedure 1064 1065 To support applications that prefer to read time zone data in text 1066 form, two zic input files tzdata.zi and leapseconds are now 1067 installed by default. The commands 'zic tzdata.zi' and 'zic -L 1068 leapseconds tzdata.zi' can reproduce the tzdata binary files 1069 without and with leap seconds, respectively. To prevent these two 1070 new files from being installed, use 'make TZDATA_TEXT=', and to 1071 suppress leap seconds from the tzdata text installation, use 'make 1072 TZDATA_TEXT=tzdata.zi'. 1073 1074 'make BACKWARD=' now suppresses backward-compatibility names 1075 like 'US/Pacific' that are defined in the 'backward' and 1076 'pacificnew' files. 1077 1078 'make check' now works on systems that lack a UTF-8 locale, 1079 or that lack the nsgmls program. Set UTF8_LOCALE to configure 1080 the name of a UTF-8 locale, if you have one. 1081 1082 Y2K runtime checks are no longer enabled by default. Add 1083 -DDEPRECATE_TWO_DIGIT_YEARS to CFLAGS to enable them, instead of 1084 adding -DNO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU 1085 to disable them. (New name suggested by Brian Inglis.) 1086 1087 The build procedure for zdump now works on AIX 7.1. 1088 (Problem reported by Kees Dekker.) 1089 1090 Changes to code 1091 1092 zic and the reference runtime now reject multiple leap seconds 1093 within 28 days of each other, or leap seconds before the Epoch. 1094 As a result, support for double leap seconds, which was 1095 obsolescent and undocumented, has been removed. Double leap 1096 seconds were an error in the C89 standard; they have never existed 1097 in civil timekeeping. (Thanks to Robert Elz and Bradley White for 1098 noticing glitches in the code that uncovered this problem.) 1099 1100 zic now warns about use of the obsolescent and undocumented -y 1101 option, and about use of the obsolescent TYPE field of Rule lines. 1102 1103 zic now allows unambiguous abbreviations like "Sa" and "Su" for 1104 weekdays; formerly it rejected them due to a bug. Conversely, zic 1105 no longer considers non-prefixes to be abbreviations; for example, 1106 it no longer accepts "lF" as an abbreviation for "lastFriday". 1107 Also, zic warns about the undocumented usage with a "last-" 1108 prefix, e.g., "last-Fri". 1109 1110 Similarly, zic now accepts the unambiguous abbreviation "L" for 1111 "Link" in ordinary context and for "Leap" in leap-second context. 1112 Conversely, zic no longer accepts non-prefixes such as "La" as 1113 abbreviations for words like "Leap". 1114 1115 zic no longer accepts leap second lines in ordinary input, or 1116 ordinary lines in leap second input. Formerly, zic sometimes 1117 warned about this undocumented usage and handled it incorrectly. 1118 1119 The new macro HAVE_TZNAME governs whether the tzname external 1120 variable is exported, instead of USG_COMPAT. USG_COMPAT now 1121 governs only the external variables "timezone" and "daylight". 1122 This change is needed because the three variables are not in the 1123 same category: although POSIX requires tzname, it specifies the 1124 other two variables as optional. Also, USG_COMPAT is now 1 or 0: 1125 if not defined, the code attempts to guess it from other macros. 1126 1127 localtime.c and difftime.c no longer require stdio.h, and .c files 1128 other than zic.c no longer require sys/wait.h. 1129 1130 zdump.c no longer assumes snprintf. (Reported by Jonathan Leffler.) 1131 1132 Calculation of time_t extrema works around a bug in GCC 4.8.4 1133 (Reported by Stan Shebs and Joseph Myers.) 1134 1135 zic.c no longer mistranslates formats of line numbers in non-English 1136 locales. (Problem reported by Benno Schulenberg.) 1137 1138 Several minor changes have been made to the code to make it a 1139 bit easier to port to MS-Windows and Solaris. (Thanks to Kees 1140 Dekker for reporting the problems.) 1141 1142 Changes to documentation and commentary 1143 1144 The two new files 'theory.html' and 'calendars' contain the 1145 contents of the removed file 'Theory'. The goal is to document 1146 tzdb theory more accessibly. 1147 1148 The zic man page now documents abbreviation rules. 1149 1150 tz-link.htm now covers how to apply tzdata changes to clients. 1151 (Thanks to Jorge Fbregas for the AIX link.) It also mentions MySQL. 1152 1153 The leap-seconds.list URL has been updated to something that is 1154 more reliable for tzdb. (Thanks to Tim Parenti and Brian Inglis.) 1155 1156 Release 2017b - 2017-03-17 07:30:38 -0700 1157 1158 Briefly: Haiti has resumed DST. 1159 1160 Changes to past and future timestamps 1161 1162 Haiti resumed observance of DST in 2017. (Thanks to Steffen Thorsen.) 1163 1164 Changes to past timestamps 1165 1166 Liberia changed from -004430 to +00 on 1972-01-07, not 1972-05-01. 1167 1168 Use "MMT" to abbreviate Liberia's time zone before 1972, as "-004430" 1169 is one byte over the POSIX limit. (Problem reported by Derick Rethans.) 1170 1171 Changes to code 1172 1173 The reference localtime implementation now falls back on the 1174 current US daylight-saving transition rules rather than the 1175 1987-2006 rules. This fallback occurs only when (1) the TZ 1176 environment variable has a value like "AST4ADT" that asks 1177 for daylight saving time but does not specify the rules, (2) there 1178 is no file by that name, and (3) the TZDEFRULES file cannot be 1179 loaded. (Thanks to Tom Lane.) 1180 1181 1182 Release 2017a - 2017-02-28 00:05:36 -0800 1183 1184 Briefly: Southern Chile moves from -04/-03 to -03, and Mongolia 1185 discontinues DST. 1186 1187 Changes to future timestamps 1188 1189 Mongolia no longer observes DST. (Thanks to Ganbold Tsagaankhuu.) 1190 1191 Chile's Region of Magallanes moves from -04/-03 to -03 year-round. 1192 Its clocks diverge from America/Santiago starting 2017-05-13 at 1193 23:00, hiving off a new zone America/Punta_Arenas. Although the 1194 Chilean government says this change expires in May 2019, for now 1195 assume it's permanent. (Thanks to Juan Correa and Deborah 1196 Goldsmith.) This also affects Antarctica/Palmer. 1197 1198 Changes to past timestamps 1199 1200 Fix many entries for historical timestamps for Europe/Madrid 1201 before 1979, to agree with tables compiled by Pere Planesas of the 1202 National Astronomical Observatory of Spain. As a side effect, 1203 this changes some timestamps for Africa/Ceuta before 1929, which 1204 are probably guesswork anyway. (Thanks to Steve Allen and 1205 Pierpaolo Bernardi for the heads-ups, and to Michael Deckers for 1206 correcting the 1901 transition.) 1207 1208 Ecuador observed DST from 1992-11-28 to 1993-02-05. 1209 (Thanks to Alois Treindl.) 1210 1211 Asia/Atyrau and Asia/Oral were at +03 (not +04) before 1930-06-21. 1212 (Thanks to Stepan Golosunov.) 1213 1214 Changes to past and future time zone abbreviations 1215 1216 Switch to numeric time zone abbreviations for South America, as 1217 part of the ongoing project of removing invented abbreviations. 1218 This avoids the need to invent an abbreviation for the new Chilean 1219 new zone. Similarly, switch from invented to numeric time zone 1220 abbreviations for Afghanistan, American Samoa, the Azores, 1221 Bangladesh, Bhutan, the British Indian Ocean Territory, Brunei, 1222 Cape Verde, Chatham Is, Christmas I, Cocos (Keeling) Is, Cook Is, 1223 Dubai, East Timor, Eucla, Fiji, French Polynesia, Greenland, 1224 Indochina, Iran, Iraq, Kiribati, Lord Howe, Macquarie, Malaysia, 1225 the Maldives, Marshall Is, Mauritius, Micronesia, Mongolia, 1226 Myanmar, Nauru, Nepal, New Caledonia, Niue, Norfolk I, Palau, 1227 Papua New Guinea, the Philippines, Pitcairn, Qatar, Runion, St 1228 Pierre & Miquelon, Samoa, Saudi Arabia, Seychelles, Singapore, 1229 Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, Wallis & Futuna, and 1230 Xinjiang; for 20-minute daylight saving time in Ghana before 1943; 1231 for half-hour daylight saving time in Belize before 1944 and in 1232 the Dominican Republic before 1975; and for Canary Islands before 1233 1946, for Guinea-Bissau before 1975, for Iceland before 1969, for 1234 Indian Summer Time before 1942, for Indonesia before around 1964, 1235 for Kenya before 1960, for Liberia before 1973, for Madeira before 1236 1967, for Namibia before 1943, for the Netherlands in 1937-9, for 1237 Pakistan before 1971, for Western Sahara before 1977, and for 1238 Zaporozhye in 1880-1924. 1239 1240 For Alaska time from 1900 through 1967, instead of "CAT" use the 1241 abbreviation "AST", the abbreviation commonly used at the time 1242 (Atlantic Standard Time had not been standardized yet). Use "AWT" 1243 and "APT" instead of the invented abbreviations "CAWT" and "CAPT". 1244 1245 Use "CST" and "CDT" instead of invented abbreviations for Macau 1246 before 1999 and Taiwan before 1938, and use "JST" instead of the 1247 invented abbreviation "JCST" for Japan and Korea before 1938. 1248 1249 Change to database entry category 1250 1251 Move the Pacific/Johnston link from 'australasia' to 'backward', 1252 since Johnston is now uninhabited. 1253 1254 Changes to code 1255 1256 zic no longer mishandles some transitions in January 2038 when it 1257 attempts to work around Qt bug 53071. This fixes a bug affecting 1258 Pacific/Tongatapu that was introduced in zic 2016e. localtime.c 1259 now contains a workaround, useful when loading a file generated by 1260 a buggy zic. (Problem and localtime.c fix reported by Bradley 1261 White.) 1262 1263 zdump -i now outputs non-hour numeric time zone abbreviations 1264 without a colon, e.g., "+0530" rather than "+05:30". This agrees 1265 with zic %z and with common practice, and simplifies auditing of 1266 zdump output. 1267 1268 zdump is now buildable again with -DUSE_LTZ=0. 1269 (Problem reported by Joseph Myers.) 1270 1271 zdump.c now always includes private.h, to avoid code duplication 1272 with private.h. (Problem reported by Kees Dekker.) 1273 1274 localtime.c no longer mishandles early or late timestamps 1275 when TZ is set to a POSIX-style string that specifies DST. 1276 (Problem reported by Kees Dekker.) 1277 1278 date and strftime now cause %z to generate "-0000" instead of 1279 "+0000" when the UT offset is zero and the time zone abbreviation 1280 begins with "-". 1281 1282 Changes to documentation and commentary 1283 1284 The 'Theory' file now better documents choice of historical time 1285 zone abbreviations. (Problems reported by Michael Deckers.) 1286 1287 tz-link.htm now covers leap smearing, which is popular in clouds. 1288 1289 1290 Release 2016j - 2016-11-22 23:17:13 -0800 1291 1292 Briefly: Saratov, Russia moves from +03 to +04 on 2016-12-04. 1293 1294 Changes to future timestamps 1295 1296 Saratov, Russia switches from +03 to +04 on 2016-12-04 at 02:00. 1297 This hives off a new zone Europe/Saratov from Europe/Volgograd. 1298 (Thanks to Yuri Konotopov and Stepan Golosunov.) 1299 1300 Changes to past timestamps 1301 1302 The new zone Asia/Atyrau for Atyra Region, Kazakhstan, is like 1303 Asia/Aqtau except it switched from +05/+06 to +04/+05 in spring 1304 1999, not fall 1994. (Thanks to Stepan Golosunov.) 1305 1306 Changes to past time zone abbreviations 1307 1308 Asia/Gaza and Asia/Hebron now use "EEST", not "EET", to denote 1309 summer time before 1948. The old use of "EET" was a typo. 1310 1311 Changes to code 1312 1313 zic no longer mishandles file systems that lack hard links, fixing 1314 bugs introduced in 2016g. (Problems reported by Tom Lane.) 1315 Also, when the destination already contains symbolic links, zic 1316 should now work better on systems where the 'link' system call 1317 does not follow symbolic links. 1318 1319 Changes to documentation and commentary 1320 1321 tz-link.htm now documents the relationship between release version 1322 numbers and development-repository commit tags. (Suggested by 1323 Paul Koning.) 1324 1325 The 'Theory' file now documents UT. 1326 1327 iso3166.tab now accents "Curaao", and commentary now mentions 1328 the names "Cabo Verde" and "Czechia". (Thanks to Ji Boh.) 1329 1330 1331 Release 2016i - 2016-11-01 23:19:52 -0700 1332 1333 Briefly: Cyprus split into two time zones on 2016-10-30, and Tonga 1334 reintroduces DST on 2016-11-06. 1335 1336 Changes to future timestamps 1337 1338 Pacific/Tongatapu begins DST on 2016-11-06 at 02:00, ending on 1339 2017-01-15 at 03:00. Assume future observances in Tonga will be 1340 from the first Sunday in November through the third Sunday in 1341 January, like Fiji. (Thanks to Pulu Anau.) Switch to numeric 1342 time zone abbreviations for this zone. 1343 1344 Changes to past and future timestamps 1345 1346 Northern Cyprus is now +03 year round, causing a split in Cyprus 1347 time zones starting 2016-10-30 at 04:00. This creates a zone 1348 Asia/Famagusta. (Thanks to Even Scharning and Matt Johnson.) 1349 1350 Antarctica/Casey switched from +08 to +11 on 2016-10-22. 1351 (Thanks to Steffen Thorsen.) 1352 1353 Changes to past timestamps 1354 1355 Several corrections were made for pre-1975 timestamps in Italy. 1356 These affect Europe/Malta, Europe/Rome, Europe/San_Marino, and 1357 Europe/Vatican. 1358 1359 First, the 1893-11-01 00:00 transition in Italy used the new UT 1360 offset (+01), not the old (+00:49:56). (Thanks to Michael 1361 Deckers.) 1362 1363 Second, rules for daylight saving in Italy were changed to agree 1364 with Italy's National Institute of Metrological Research (INRiM) 1365 except for 1944, as follows (thanks to Pierpaolo Bernardi, Brian 1366 Inglis, and Michael Deckers): 1367 1368 The 1916-06-03 transition was at 24:00, not 00:00. 1369 1370 The 1916-10-01, 1919-10-05, and 1920-09-19 transitions were at 1371 00:00, not 01:00. 1372 1373 The 1917-09-30 and 1918-10-06 transitions were at 24:00, not 1374 01:00. 1375 1376 The 1944-09-17 transition was at 03:00, not 01:00. This 1377 particular change is taken from Italian law as INRiM's table, 1378 (which says 02:00) appears to have a typo here. Also, keep the 1379 1944-04-03 transition for Europe/Rome, as Rome was controlled by 1380 Germany then. 1381 1382 The 1967-1970 and 1972-1974 fallback transitions were at 01:00, 1383 not 00:00. 1384 1385 Changes to code 1386 1387 The code should now be buildable on AmigaOS merely by setting the 1388 appropriate Makefile variables. (From a patch by Carsten Larsen.) 1389 1390 1391 Release 2016h - 2016-10-19 23:17:57 -0700 1392 1393 Changes to future timestamps 1394 1395 Asia/Gaza and Asia/Hebron end DST on 2016-10-29 at 01:00, not 1396 2016-10-21 at 00:00. (Thanks to Sharef Mustafa.) Predict that 1397 future fall transitions will be on the last Saturday of October 1398 at 01:00, which is consistent with predicted spring transitions 1399 on the last Saturday of March. (Thanks to Tim Parenti.) 1400 1401 Changes to past timestamps 1402 1403 In Turkey, transitions in 1986-1990 were at 01:00 standard time 1404 not at 02:00, and the spring 1994 transition was on March 20, not 1405 March 27. (Thanks to Kvan Yazan.) 1406 1407 Changes to past and future time zone abbreviations 1408 1409 Asia/Colombo now uses numeric time zone abbreviations like "+0530" 1410 instead of alphabetic ones like "IST" and "LKT". Various 1411 English-language sources use "IST", "LKT" and "SLST", with no 1412 working consensus. (Usage of "SLST" mentioned by Sadika 1413 Sumanapala.) 1414 1415 Changes to code 1416 1417 zic no longer mishandles relativizing file names when creating 1418 symbolic links like /etc/localtime, when these symbolic links 1419 are outside the usual directory hierarchy. This fixes a bug 1420 introduced in 2016g. (Problem reported by Andreas Stieger.) 1421 1422 Changes to build procedure 1423 1424 New rules 'traditional_tarballs' and 'traditional_signatures' for 1425 building just the traditional-format distribution. (Requested by 1426 Deborah Goldsmith.) 1427 1428 The file 'version' is now put into the tzdata tarball too. 1429 (Requested by Howard Hinnant.) 1430 1431 Changes to documentation and commentary 1432 1433 The 'Theory' file now has a section on interface stability. 1434 (Requested by Paul Koning.) It also mentions features like 1435 tm_zone and localtime_rz that have long been supported by the 1436 reference code. 1437 1438 tz-link.htm has improved coverage of time zone boundaries suitable 1439 for geolocation. (Thanks to heads-ups from Evan Siroky and Matt 1440 Johnson.) 1441 1442 The US commentary now mentions Allen and the "day of two noons". 1443 1444 The Fiji commentary mentions the government's 2016-10-03 press 1445 release. (Thanks to Raymond Kumar.) 1446 1447 1448 Release 2016g - 2016-09-13 08:56:38 -0700 1449 1450 Changes to future timestamps 1451 1452 Turkey switched from EET/EEST (+02/+03) to permanent +03, 1453 effective 2016-09-07. (Thanks to Burak AYDIN.) Use "+03" rather 1454 than an invented abbreviation for the new time. 1455 1456 New leap second 2016-12-31 23:59:60 UTC as per IERS Bulletin C 52. 1457 (Thanks to Tim Parenti.) 1458 1459 Changes to past timestamps 1460 1461 For America/Los_Angeles, spring-forward transition times have been 1462 corrected from 02:00 to 02:01 in 1948, and from 02:00 to 01:00 in 1463 1950-1966. 1464 1465 For zones using Soviet time on 1919-07-01, transitions to UT-based 1466 time were at 00:00 UT, not at 02:00 local time. The affected 1467 zones are Europe/Kirov, Europe/Moscow, Europe/Samara, and 1468 Europe/Ulyanovsk. (Thanks to Alexander Belopolsky.) 1469 1470 Changes to past and future time zone abbreviations 1471 1472 The Factory zone now uses the time zone abbreviation -00 instead 1473 of a long English-language string, as -00 is now the normal way to 1474 represent an undefined time zone. 1475 1476 Several zones in Antarctica and the former Soviet Union, along 1477 with zones intended for ships at sea that cannot use POSIX TZ 1478 strings, now use numeric time zone abbreviations instead of 1479 invented or obsolete alphanumeric abbreviations. The affected 1480 zones are Antarctica/Casey, Antarctica/Davis, 1481 Antarctica/DumontDUrville, Antarctica/Mawson, Antarctica/Rothera, 1482 Antarctica/Syowa, Antarctica/Troll, Antarctica/Vostok, 1483 Asia/Anadyr, Asia/Ashgabat, Asia/Baku, Asia/Bishkek, Asia/Chita, 1484 Asia/Dushanbe, Asia/Irkutsk, Asia/Kamchatka, Asia/Khandyga, 1485 Asia/Krasnoyarsk, Asia/Magadan, Asia/Omsk, Asia/Sakhalin, 1486 Asia/Samarkand, Asia/Srednekolymsk, Asia/Tashkent, Asia/Tbilisi, 1487 Asia/Ust-Nera, Asia/Vladivostok, Asia/Yakutsk, Asia/Yekaterinburg, 1488 Asia/Yerevan, Etc/GMT-14, Etc/GMT-13, Etc/GMT-12, Etc/GMT-11, 1489 Etc/GMT-10, Etc/GMT-9, Etc/GMT-8, Etc/GMT-7, Etc/GMT-6, Etc/GMT-5, 1490 Etc/GMT-4, Etc/GMT-3, Etc/GMT-2, Etc/GMT-1, Etc/GMT+1, Etc/GMT+2, 1491 Etc/GMT+3, Etc/GMT+4, Etc/GMT+5, Etc/GMT+6, Etc/GMT+7, Etc/GMT+8, 1492 Etc/GMT+9, Etc/GMT+10, Etc/GMT+11, Etc/GMT+12, Europe/Kaliningrad, 1493 Europe/Minsk, Europe/Samara, Europe/Volgograd, and 1494 Indian/Kerguelen. For Europe/Moscow the invented abbreviation MSM 1495 was replaced by +05, whereas MSK and MSD were kept as they are not 1496 our invention and are widely used. 1497 1498 Changes to zone names 1499 1500 Rename Asia/Rangoon to Asia/Yangon, with a backward compatibility link. 1501 (Thanks to David Massoud.) 1502 1503 Changes to code 1504 1505 zic no longer generates binary files containing POSIX TZ-like 1506 strings that disagree with the local time type after the last 1507 explicit transition in the data. This fixes a bug with 1508 Africa/Casablanca and Africa/El_Aaiun in some year-2037 timestamps 1509 on the reference platform. (Thanks to Alexander Belopolsky for 1510 reporting the bug and suggesting a way forward.) 1511 1512 If the installed localtime and/or posixrules files are symbolic 1513 links, zic now keeps them symbolic links when updating them, for 1514 compatibility with platforms like OpenSUSE where other programs 1515 configure these files as symlinks. 1516 1517 zic now avoids hard linking to symbolic links, avoids some 1518 unnecessary mkdir and stat system calls, and uses shorter file 1519 names internally. 1520 1521 zdump has a new -i option to generate transitions in a 1522 more-compact but still human-readable format. This option is 1523 experimental, and the output format may change in future versions. 1524 (Thanks to Jon Skeet for suggesting that an option was needed, 1525 and thanks to Tim Parenti and Chris Rovick for further comments.) 1526 1527 Changes to build procedure 1528 1529 An experimental distribution format is available, in addition 1530 to the traditional format which will continue to be distributed. 1531 The new format is a tarball tzdb-VERSION.tar.lz with signature 1532 file tzdb-VERSION.tar.lz.asc. It unpacks to a top-level directory 1533 tzdb-VERSION containing the code and data of the traditional 1534 two-tarball format, along with extra data that may be useful. 1535 (Thanks to Antonio Diaz Diaz, Oscar van Vlijmen, and many others 1536 for comments about the experimental format.) 1537 1538 The release version number is now more accurate in the usual case 1539 where releases are built from a Git repository. For example, if 1540 23 commits and some working-file changes have been made since 1541 release 2016g, the version number is now something like 1542 '2016g-23-g50556e3-dirty' instead of the misleading '2016g'. 1543 Tagged releases use the same version number format as before, 1544 e.g., '2016g'. To support the more-accurate version number, its 1545 specification has moved from a line in the Makefile to a new 1546 source file 'version'. 1547 1548 The experimental distribution contains a file to2050.tzs that 1549 contains what should be the output of 'zdump -i -c 2050' on 1550 primary zones. If this file is available, 'make check' now checks 1551 that zdump generates this output. 1552 1553 'make check_web' now works on Fedora-like distributions. 1554 1555 Changes to documentation and commentary 1556 1557 tzfile.5 now documents the new restriction on POSIX TZ-like 1558 strings that is now implemented by zic. 1559 1560 Comments now cite URLs for some 1917-1921 Russian DST decrees. 1561 (Thanks to Alexander Belopolsky.) 1562 1563 tz-link.htm mentions JuliaTime (thanks to Curtis Vogt) and Time4J 1564 (thanks to Meno Hochschild) and ThreeTen-Extra, and its 1565 description of Java 8 has been brought up to date (thanks to 1566 Stephen Colebourne). Its description of local time on Mars has 1567 been updated to match current practice, and URLs have been updated 1568 and some obsolete ones removed. 1569 1570 1571 Release 2016f - 2016-07-05 16:26:51 +0200 1572 1573 Changes affecting future timestamps 1574 1575 The Egyptian government changed its mind on short notice, and 1576 Africa/Cairo will not introduce DST starting 2016-07-07 after all. 1577 (Thanks to Mina Samuel.) 1578 1579 Asia/Novosibirsk switches from +06 to +07 on 2016-07-24 at 02:00. 1580 (Thanks to Stepan Golosunov.) 1581 1582 Changes to past and future timestamps 1583 1584 Asia/Novokuznetsk and Asia/Novosibirsk now use numeric time zone 1585 abbreviations instead of invented ones. 1586 1587 Changes affecting past timestamps 1588 1589 Europe/Minsk's 1992-03-29 spring-forward transition was at 02:00 not 00:00. 1590 (Thanks to Stepan Golosunov.) 1591 1592 1593 Release 2016e - 2016-06-14 08:46:16 -0700 1594 1595 Changes affecting future timestamps 1596 1597 Africa/Cairo observes DST in 2016 from July 7 to the end of October. 1598 Guess October 27 and 24:00 transitions. (Thanks to Steffen Thorsen.) 1599 For future years, guess April's last Thursday to October's last 1600 Thursday except for Ramadan. 1601 1602 Changes affecting past timestamps 1603 1604 Locations while uninhabited now use '-00', not 'zzz', as a 1605 placeholder time zone abbreviation. This is inspired by Internet 1606 RFC 3339 and is more consistent with numeric time zone 1607 abbreviations already used elsewhere. The change affects several 1608 arctic and antarctic locations, e.g., America/Cambridge_Bay before 1609 1920 and Antarctica/Troll before 2005. 1610 1611 Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was 1612 at 03:00, not 23:00 the previous day. (Thanks to Michael Deckers.) 1613 1614 Changes to code 1615 1616 zic now outputs a dummy transition at time 2**31 - 1 in zones 1617 whose POSIX-style TZ strings contain a '<'. This mostly works 1618 around Qt bug 53071 <https://bugreports.qt.io/browse/QTBUG-53071>. 1619 (Thanks to Zhanibek Adilbekov for reporting the Qt bug.) 1620 1621 Changes affecting documentation and commentary 1622 1623 tz-link.htm says why governments should give plenty of notice for 1624 time zone or DST changes, and refers to Matt Johnson's blog post. 1625 1626 tz-link.htm mentions Tzdata for Elixir. (Thanks to Matt Johnson.) 1627 1628 1629 Release 2016d - 2016-04-17 22:50:29 -0700 1630 1631 Changes affecting future timestamps 1632 1633 America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30. 1634 (Thanks to Alexander Krivenyshev for the heads-up.) 1635 1636 Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00. 1637 (Thanks to Alexander Krivenyshev and Matt Johnson.) 1638 1639 New zone Asia/Tomsk, split off from Asia/Novosibirsk. It covers 1640 Tomsk Oblast, Russia, which switches from +06 to +07 on 2016-05-29 1641 at 02:00. (Thanks to Stepan Golosunov.) 1642 1643 Changes affecting past timestamps 1644 1645 New zone Europe/Kirov, split off from Europe/Volgograd. It covers 1646 Kirov Oblast, Russia, which switched from +04/+05 to +03/+04 on 1647 1989-03-26 at 02:00, roughly a year after Europe/Volgograd made 1648 the same change. (Thanks to Stepan Golosunov.) 1649 1650 Russia and nearby locations had daylight-saving transitions on 1651 1992-03-29 at 02:00 and 1992-09-27 at 03:00, instead of on 1652 1992-03-28 at 23:00 and 1992-09-26 at 23:00. (Thanks to Stepan 1653 Golosunov.) 1654 1655 Many corrections to historical time in Kazakhstan from 1991 1656 through 2005. (Thanks to Stepan Golosunov.) Replace Kazakhstan's 1657 invented time zone abbreviations with numeric abbreviations. 1658 1659 Changes to commentary 1660 1661 Mention Internet RFCs 7808 (TZDIST) and 7809 (CalDAV time zone references). 1662 1663 1664 Release 2016c - 2016-03-23 00:51:27 -0700 1665 1666 Changes affecting future timestamps 1667 1668 Azerbaijan no longer observes DST. (Thanks to Steffen Thorsen.) 1669 1670 Chile reverts from permanent to seasonal DST. (Thanks to Juan 1671 Correa for the heads-up, and to Tim Parenti for corrections.) 1672 Guess that future transitions are August's and May's second 1673 Saturdays at 24:00 mainland time. Also, call the period from 1674 2014-09-07 through 2016-05-14 daylight saving time instead of 1675 standard time, as that seems more appropriate now. 1676 1677 Changes affecting past timestamps 1678 1679 Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to 1680 +02/+03 on 1989-03-26, not 1991-03-31. Europe/Volgograd changed 1681 from +04/+05 to +03/+04 on 1988-03-27, not 1989-03-26. 1682 (Thanks to Stepan Golosunov.) 1683 1684 Changes to commentary 1685 1686 Several updates and URLs for historical and proposed Russian changes. 1687 (Thanks to Stepan Golosunov, Matt Johnson, and Alexander Krivenyshev.) 1688 1689 1690 Release 2016b - 2016-03-12 17:30:14 -0800 1691 1692 Compatibility note 1693 1694 Starting with release 2016b, some data entries cause zic implementations 1695 derived from tz releases 2005j through 2015e to issue warnings like 1696 "time zone abbreviation differs from POSIX standard (+03)". 1697 These warnings should not otherwise affect zic's output and can safely be 1698 ignored on today's platforms, as the warnings refer to a restriction in 1699 POSIX.1-1988 that was removed in POSIX.1-2001. One way to suppress the 1700 warnings is to upgrade to zic derived from tz releases 2015f and later. 1701 1702 Changes affecting future timestamps 1703 1704 New zones Europe/Astrakhan and Europe/Ulyanovsk for Astrakhan and 1705 Ulyanovsk Oblasts, Russia, both of which will switch from +03 to +04 on 1706 2016-03-27 at 02:00 local time. They need distinct zones since their 1707 post-1970 histories disagree. New zone Asia/Barnaul for Altai Krai and 1708 Altai Republic, Russia, which will switch from +06 to +07 on the same date 1709 and local time. The Astrakhan change is already official; the others have 1710 passed the first reading in the State Duma and are extremely likely. 1711 Also, Asia/Sakhalin moves from +10 to +11 on 2016-03-27 at 02:00. 1712 (Thanks to Alexander Krivenyshev for the heads-up, and to Matt Johnson 1713 and Stepan Golosunov for followup.) 1714 1715 As a trial of a new system that needs less information to be made up, 1716 the new zones use numeric time zone abbreviations like "+04" 1717 instead of invented abbreviations like "ASTT". 1718 1719 Haiti will not observe DST in 2016. (Thanks to Jean Antoine via 1720 Steffen Thorsen.) 1721 1722 Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00. 1723 (Thanks to Hannah Kreitem.) Guess future transitions will be March's last 1724 Saturday at 01:00, not March's last Friday at 24:00. 1725 1726 Changes affecting past timestamps 1727 1728 Europe/Chisinau observed DST during 1990, and switched from +04 to 1729 +03 at 1990-05-06 02:00, instead of switching from +03 to +02. 1730 (Thanks to Stepan Golosunov.) 1731 1732 1991 abbreviations in Europe/Samara should be SAMT/SAMST, not 1733 KUYT/KUYST. (Thanks to Stepan Golosunov.) 1734 1735 Changes to code 1736 1737 tzselect's diagnostics and checking, and checktab.awk's checking, 1738 have been improved. (Thanks to J William Piggott.) 1739 1740 tzcode now builds under MinGW. (Thanks to Ian Abbott and Esben Haabendal.) 1741 1742 tzselect now tests Julian-date TZ settings more accurately. 1743 (Thanks to J William Piggott.) 1744 1745 Changes to commentary 1746 1747 Comments in zone tables have been improved. (Thanks to J William Piggott.) 1748 1749 tzselect again limits its menu comments so that menus fit on a 1750 2480 alphanumeric display. 1751 1752 A new web page tz-how-to.html. (Thanks to Bill Seymour.) 1753 1754 In the Theory file, the description of possible time zone abbreviations in 1755 tzdata has been cleaned up, as the old description was unclear and 1756 inconsistent. (Thanks to Alain Mouette for reporting the problem.) 1757 1758 1759 Release 2016a - 2016-01-26 23:28:02 -0800 1760 1761 Changes affecting future timestamps 1762 1763 America/Cayman will not observe daylight saving this year after all. 1764 Revert our guess that it would. (Thanks to Matt Johnson.) 1765 1766 Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00. 1767 (Thanks to Alexander Krivenyshev.) 1768 1769 Asia/Tehran now has DST predictions for the year 2038 and later, 1770 to be March 21 00:00 to September 21 00:00. This is likely better 1771 than predicting no DST, albeit off by a day every now and then. 1772 1773 Changes affecting past and future timestamps 1774 1775 America/Metlakatla switched from PST all year to AKST/AKDT on 1776 2015-11-01 at 02:00. (Thanks to Steffen Thorsen.) 1777 1778 America/Santa_Isabel has been removed, and replaced with a 1779 backward compatibility link to America/Tijuana. Its contents were 1780 apparently based on a misreading of Mexican legislation. 1781 1782 Changes affecting past timestamps 1783 1784 Asia/Karachi's two transition times in 2002 were off by a minute. 1785 (Thanks to Matt Johnson.) 1786 1787 Changes affecting build procedure 1788 1789 An installer can now combine leap seconds with use of the backzone file, 1790 e.g., with 'make PACKRATDATA=backzone REDO=posix_right zones'. 1791 The old 'make posix_packrat' rule is now marked as obsolescent. 1792 (Thanks to Ian Abbott for an initial implementation.) 1793 1794 Changes affecting documentation and commentary 1795 1796 A new file LICENSE makes it easier to see that the code and data 1797 are mostly public-domain. (Thanks to James Knight.) The three 1798 non-public-domain files now use the current (3-clause) BSD license 1799 instead of older versions of that license. 1800 1801 tz-link.htm mentions the BDE library (thanks to Andrew Paprocki), 1802 CCTZ (thanks to Tim Parenti), TimeJones.com, and has a new section 1803 on editing tz source files (with a mention of Sublime zoneinfo, 1804 thanks to Gilmore Davidson). 1805 1806 The Theory and asia files now mention the 2015 book "The Global 1807 Transformation of Time, 1870-1950", and cite a couple of reviews. 1808 1809 The America/Chicago entry now documents the informal use of US 1810 central time in Fort Pierre, South Dakota. (Thanks to Rick 1811 McDermid, Matt Johnson, and Steve Jones.) 1812 1813 1814 Release 2015g - 2015-10-01 00:39:51 -0700 1815 1816 Changes affecting future timestamps 1817 1818 Turkey's 2015 fall-back transition is scheduled for Nov. 8, not Oct. 25. 1819 (Thanks to Fatih.) 1820 1821 Norfolk moves from +1130 to +1100 on 2015-10-04 at 02:00 local time. 1822 (Thanks to Alexander Krivenyshev.) 1823 1824 Fiji's 2016 fall-back transition is scheduled for January 17, not 24. 1825 (Thanks to Ken Rylander.) 1826 1827 Fort Nelson, British Columbia will not fall back on 2015-11-01. It has 1828 effectively been on MST (-0700) since it advanced its clocks on 2015-03-08. 1829 New zone America/Fort_Nelson. (Thanks to Matt Johnson.) 1830 1831 Changes affecting past timestamps 1832 1833 Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00. 1834 1835 Changes affecting code 1836 1837 localtime no longer mishandles America/Anchorage after 2037. 1838 (Thanks to Bradley White for reporting the bug.) 1839 1840 On hosts with signed 32-bit time_t, localtime no longer mishandles 1841 Pacific/Fiji after 2038-01-16 14:00 UTC. 1842 1843 The localtime module allows the variables 'timezone', 'daylight', 1844 and 'altzone' to be in common storage shared with other modules, 1845 and declares them in case the system <time.h> does not. 1846 (Problems reported by Kees Dekker.) 1847 1848 On platforms with tm_zone, strftime.c now assumes it is not NULL. 1849 This simplifies the code and is consistent with zdump.c. 1850 (Problem reported by Christos Zoulas.) 1851 1852 Changes affecting documentation 1853 1854 The tzfile man page now documents that transition times denote the 1855 starts (not the ends) of the corresponding time periods. 1856 (Ambiguity reported by Bill Seymour.) 1857 1858 1859 Release 2015f - 2015-08-10 18:06:56 -0700 1860 1861 Changes affecting future timestamps 1862 1863 North Korea switches to +0830 on 2015-08-15. (Thanks to Steffen Thorsen.) 1864 The abbreviation remains "KST". (Thanks to Robert Elz.) 1865 1866 Uruguay no longer observes DST. (Thanks to Steffen Thorsen 1867 and Pablo Camargo.) 1868 1869 Changes affecting past and future timestamps 1870 1871 Moldova starts and ends DST at 00:00 UTC, not at 01:00 UTC. 1872 (Thanks to Roman Tudos.) 1873 1874 Changes affecting data format and code 1875 1876 zic's '-y YEARISTYPE' option is no longer documented. The TYPE 1877 field of a Rule line should now be '-'; the old values 'even', 1878 'odd', 'uspres', 'nonpres', 'nonuspres' were already undocumented. 1879 Although the implementation has not changed, these features do not 1880 work in the default installation, they are not used in the data, 1881 and they are now considered obsolescent. 1882 1883 zic now checks that two rules don't take effect at the same time. 1884 (Thanks to Jon Skeet and Arthur David Olson.) Constraints on 1885 simultaneity are now documented. 1886 1887 The two characters '%z' in a zone format now stand for the UT 1888 offset, e.g., '-07' for seven hours behind UT and '+0530' for 1889 five hours and thirty minutes ahead. This better supports time 1890 zone abbreviations conforming to POSIX.1-2001 and later. 1891 1892 Changes affecting installed data files 1893 1894 Comments for America/Halifax and America/Glace_Bay have been improved. 1895 (Thanks to Brian Inglis.) 1896 1897 Data entries have been simplified for Atlantic/Canary, Europe/Simferopol, 1898 Europe/Sofia, and Europe/Tallinn. This yields slightly smaller 1899 installed data files for Europe/Simferopol and Europe/Tallinn. 1900 It does not affect timestamps. (Thanks to Howard Hinnant.) 1901 1902 Changes affecting code 1903 1904 zdump and zic no longer warn about valid time zone abbreviations 1905 like '-05'. 1906 1907 Some Visual Studio 2013 warnings have been suppressed. 1908 (Thanks to Kees Dekker.) 1909 1910 'date' no longer sets the time of day and its -a, -d, -n and -t 1911 options have been removed. Long obsolescent, the implementation 1912 of these features had porting problems. Builders no longer need 1913 to configure HAVE_ADJTIME, HAVE_SETTIMEOFDAY, or HAVE_UTMPX_H. 1914 (Thanks to Kees Dekker for pointing out the problem.) 1915 1916 Changes affecting documentation 1917 1918 The Theory file mentions naming issues earlier, as these seem to be 1919 poorly publicized (thanks to Gilmore Davidson for reporting the problem). 1920 1921 tz-link.htm mentions Time Zone Database Parser (thanks to Howard Hinnant). 1922 1923 Mention that Herbert Samuel introduced the term "Summer Time". 1924 1925 1926 Release 2015e - 2015-06-13 10:56:02 -0700 1927 1928 Changes affecting future timestamps 1929 1930 Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00, 1931 not 06-13 and 07-18 as we had guessed. (Thanks to Milamber.) 1932 1933 Assume Cayman Islands will observe DST starting next year, using US rules. 1934 Although it isn't guaranteed, it is the most likely. 1935 1936 Changes affecting data format 1937 1938 The file 'iso3166.tab' now uses UTF-8, so that its entries can better 1939 spell the names of land Islands, Cte d'Ivoire, and Runion. 1940 1941 Changes affecting code 1942 1943 When displaying data, tzselect converts it to the current locale's 1944 encoding if the iconv command works. (Problem reported by random832.) 1945 1946 tzselect no longer mishandles Dominica, fixing a bug introduced 1947 in Release 2014f. (Problem reported by Owen Leibman.) 1948 1949 zic -l no longer fails when compiled with -DTZDEFAULT=\"/etc/localtime\". 1950 This fixes a bug introduced in Release 2014f. 1951 (Problem reported by Leonardo Chiquitto.) 1952 1953 1954 Release 2015d - 2015-04-24 08:09:46 -0700 1955 1956 Changes affecting future timestamps 1957 1958 Egypt will not observe DST in 2015 and will consider canceling it 1959 permanently. For now, assume no DST indefinitely. 1960 (Thanks to Ahmed Nazmy and Tim Parenti.) 1961 1962 Changes affecting past timestamps 1963 1964 America/Whitehorse switched from UT -09 to -08 on 1967-05-28, not 1965 1966-07-01. Also, Yukon's time zone history is documented better. 1966 (Thanks to Brian Inglis and Dennis Ferguson.) 1967 1968 Change affecting past and future time zone abbreviations 1969 1970 The abbreviations for Hawaii-Aleutian standard and daylight times 1971 have been changed from HAST/HADT to HST/HDT, as per US Government 1972 Printing Office style. This affects only America/Adak since 1983, 1973 as America/Honolulu was already using the new style. 1974 1975 Changes affecting code 1976 1977 zic has some minor performance improvements. 1978 1979 1980 Release 2015c - 2015-04-11 08:55:55 -0700 1981 1982 Changes affecting future timestamps 1983 1984 Egypt's spring-forward transition is at 24:00 on April's last Thursday, 1985 not 00:00 on April's last Friday. 2015's transition will therefore be on 1986 Thursday, April 30 at 24:00, not Friday, April 24 at 00:00. Similar fixes 1987 apply to 2026, 2037, 2043, etc. (Thanks to Steffen Thorsen.) 1988 1989 Changes affecting past timestamps 1990 1991 The following changes affect some pre-1991 Chile-related timestamps 1992 in America/Santiago, Antarctica/Palmer, and Pacific/Easter. 1993 1994 The 1910 transition was January 10, not January 1. 1995 1996 The 1918 transition was September 10, not September 1. 1997 1998 The UT -04 time observed from 1932 to 1942 is now considered to 1999 be standard time, not year-round DST. 2000 2001 Santiago observed DST (UT -03) from 1946-07-15 through 2002 1946-08-31, then reverted to standard time, then switched to -05 2003 on 1947-04-01. 2004 2005 Assume transitions before 1968 were at 00:00, since we have no data 2006 saying otherwise. 2007 2008 The spring 1988 transition was 1988-10-09, not 1988-10-02. 2009 The fall 1990 transition was 1990-03-11, not 1990-03-18. 2010 2011 Assume no UT offset change for Pacific/Easter on 1890-01-01, 2012 and omit all transitions on Pacific/Easter from 1942 through 1946 2013 since we have no data suggesting that they existed. 2014 2015 One more zone has been turned into a link, as it differed 2016 from an existing zone only for older timestamps. As usual, 2017 this change affects UT offsets in pre-1970 timestamps only. 2018 The zone's old contents have been moved to the 'backzone' file. 2019 The affected zone is America/Montreal. 2020 2021 Changes affecting commentary 2022 2023 Mention the TZUpdater tool. 2024 2025 Mention "The Time Now". (Thanks to Brandon Ramsey.) 2026 2027 2028 Release 2015b - 2015-03-19 23:28:11 -0700 2029 2030 Changes affecting future timestamps 2031 2032 Mongolia will start observing DST again this year, from the last 2033 Saturday in March at 02:00 to the last Saturday in September at 00:00. 2034 (Thanks to Ganbold Tsagaankhuu.) 2035 2036 Palestine will start DST on March 28, not March 27. Also, 2037 correct the fall 2014 transition from September 26 to October 24. 2038 Adjust future predictions accordingly. (Thanks to Steffen Thorsen.) 2039 2040 Changes affecting past timestamps 2041 2042 The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a 2043 regression. (Thanks to Stuart Bishop for reporting the problem.) 2044 2045 Some more zones have been turned into links, when they differed 2046 from existing zones only for older timestamps. As usual, 2047 these changes affect UT offsets in pre-1970 timestamps only. 2048 Their old contents have been moved to the 'backzone' file. 2049 The affected zones are: America/Antigua, America/Cayman, 2050 Pacific/Midway, and Pacific/Saipan. 2051 2052 Changes affecting time zone abbreviations 2053 2054 Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD". 2055 (Thanks to Hank W.) 2056 2057 Changes affecting code 2058 2059 Fix integer overflow bug in reference 'mktime' implementation. 2060 (Problem reported by Jrg Richter.) 2061 2062 Allow -Dtime_tz=time_t compilations, and allow -Dtime_tz=... libraries 2063 to be used in the same executable as standard-library time_t functions. 2064 (Problems reported by Bradley White.) 2065 2066 Changes affecting commentary 2067 2068 Cite the recent Mexican decree changing Quintana Roo's time zone. 2069 (Thanks to Carlos Ral Perasso.) 2070 2071 Likewise for the recent Chilean decree. (Thanks to Eduardo Romero Urra.) 2072 2073 Update info about Mars time. 2074 2075 2076 Release 2015a - 2015-01-29 22:35:20 -0800 2077 2078 Changes affecting future timestamps 2079 2080 The Mexican state of Quintana Roo, represented by America/Cancun, 2081 will shift from Central Time with DST to Eastern Time without DST 2082 on 2015-02-01 at 02:00. (Thanks to Steffen Thorsen and Gwillim Law.) 2083 2084 Chile will not change clocks in April or thereafter; its new standard time 2085 will be its old daylight saving time. This affects America/Santiago, 2086 Pacific/Easter, and Antarctica/Palmer. (Thanks to Juan Correa.) 2087 2088 New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49. 2089 (Thanks to Tim Parenti.) 2090 2091 Changes affecting past timestamps 2092 2093 Iceland observed DST in 1919 and 1921, and its 1939 fallback 2094 transition was Oct. 29, not Nov. 29. Remove incorrect data from 2095 Shanks about time in Iceland between 1837 and 1908. 2096 2097 Some more zones have been turned into links, when they differed 2098 from existing zones only for older timestamps. As usual, 2099 these changes affect UT offsets in pre-1970 timestamps only. 2100 Their old contents have been moved to the 'backzone' file. 2101 The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait, 2102 and Asia/Muscat. 2103 2104 Changes affecting code 2105 2106 tzalloc now scrubs time zone abbreviations compatibly with the way 2107 that tzset always has, by replacing invalid bytes with '_' and by 2108 shortening too-long abbreviations. 2109 2110 tzselect ports to POSIX awk implementations, no longer mishandles 2111 POSIX TZ settings when GNU awk is used, and reports POSIX TZ 2112 settings to the user. (Thanks to Stefan Kuhn.) 2113 2114 Changes affecting build procedure 2115 2116 'make check' now checks for links to links in the data. 2117 One such link (for Africa/Asmera) has been fixed. 2118 (Thanks to Stephen Colebourne for pointing out the problem.) 2119 2120 Changes affecting commentary 2121 2122 The leapseconds file commentary now mentions the expiration date. 2123 (Problem reported by Martin Burnicki.) 2124 2125 Update Mexican Library of Congress URL. 2126 2127 2128 Release 2014j - 2014-11-10 17:37:11 -0800 2129 2130 Changes affecting current and future timestamps 2131 2132 Turks & Caicos' switch from US eastern time to UT -04 year-round 2133 did not occur on 2014-11-02 at 02:00. It's currently scheduled 2134 for 2015-11-01 at 02:00. (Thanks to Chris Walton.) 2135 2136 Changes affecting past timestamps 2137 2138 Many pre-1989 timestamps have been corrected for Asia/Seoul and 2139 Asia/Pyongyang, based on sources for the Korean-language Wikipedia 2140 entry for time in Korea. (Thanks to Sanghyuk Jung.) Also, no 2141 longer guess that Pyongyang mimicked Seoul time after World War II, 2142 as this is politically implausible. 2143 2144 Some more zones have been turned into links, when they differed 2145 from existing zones only for older timestamps. As usual, 2146 these changes affect UT offsets in pre-1970 timestamps only. 2147 Their old contents have been moved to the 'backzone' file. 2148 The affected zones are: Africa/Addis_Ababa, Africa/Asmara, 2149 Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Kampala, 2150 Africa/Mogadishu, Indian/Antananarivo, Indian/Comoro, and 2151 Indian/Mayotte. 2152 2153 Changes affecting commentary 2154 2155 The commentary is less enthusiastic about Shanks as a source, 2156 and is more careful to distinguish UT from UTC. 2157 2158 2159 Release 2014i - 2014-10-21 22:04:57 -0700 2160 2161 Changes affecting future timestamps 2162 2163 Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00. 2164 (Thanks to Ken Rylander for the heads-up.) Guess that future 2165 years will use a similar pattern. 2166 2167 A new Zone Pacific/Bougainville, for the part of Papua New Guinea 2168 that plans to switch from UT +10 to +11 on 2014-12-28 at 02:00. 2169 (Thanks to Kiley Walbom for the heads-up.) 2170 2171 Changes affecting time zone abbreviations 2172 2173 Since Belarus is not changing its clocks even though Moscow is, 2174 the time zone abbreviation in Europe/Minsk is changing from FET 2175 to its more-traditional value MSK on 2014-10-26 at 01:00. 2176 (Thanks to Alexander Bokovoy for the heads-up about Belarus.) 2177 2178 The new abbreviation IDT stands for the pre-1976 use of UT +08 in 2179 Indochina, to distinguish it better from ICT (+07). 2180 2181 Changes affecting past timestamps 2182 2183 Many timestamps have been corrected for Asia/Ho_Chi_Minh before 1976 2184 (thanks to Trn Ngc Qun for an indirect pointer to Trn Tin Bnh's 2185 authoritative book). Asia/Ho_Chi_Minh has been added to 2186 zone1970.tab, to give tzselect users in Vietnam two choices, 2187 since north and south Vietnam disagreed after our 1970 cutoff. 2188 2189 Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as 2190 they differed from existing zones only for older timestamps. As 2191 usual, these changes affect pre-1970 timestamps only. Their old 2192 contents have been moved to the 'backzone' file. 2193 2194 Changes affecting code 2195 2196 The time-related library functions now set errno on failure, and 2197 some crashes in the new tzalloc-related library functions have 2198 been fixed. (Thanks to Christos Zoulas for reporting most of 2199 these problems and for suggesting fixes.) 2200 2201 If USG_COMPAT is defined and the requested timestamp is standard time, 2202 the tz library's localtime and mktime functions now set the extern 2203 variable timezone to a value appropriate for that timestamp; and 2204 similarly for ALTZONE, daylight saving time, and the altzone variable. 2205 This change is a companion to the tzname change in 2014h, and is 2206 designed to make timezone and altzone more compatible with tzname. 2207 2208 The tz library's functions now set errno to EOVERFLOW if they fail 2209 because the result cannot be represented. ctime and ctime_r now 2210 return NULL and set errno when a timestamp is out of range, rather 2211 than having undefined behavior. 2212 2213 Some bugs associated with the new 2014g functions have been fixed. 2214 This includes a bug that largely incapacitated the new functions 2215 time2posix_z and posix2time_z. (Thanks to Christos Zoulas.) 2216 It also includes some uses of uninitialized variables after tzalloc. 2217 The new code uses the standard type 'ssize_t', which the Makefile 2218 now gives porting advice about. 2219 2220 Changes affecting commentary 2221 2222 Updated URLs for NRC Canada (thanks to Matt Johnson and Brian Inglis). 2223 2224 2225 Release 2014h - 2014-09-25 18:59:03 -0700 2226 2227 Changes affecting past timestamps 2228 2229 America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28. 2230 2231 Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01, 2232 not 1920-01-06. The old entry was based on a misinterpretation of Shanks. 2233 2234 Some more zones have been turned into links, when they differed 2235 from existing zones only for older timestamps. As usual, 2236 these changes affect UT offsets in pre-1970 timestamps only. 2237 Their old contents have been moved to the 'backzone' file. 2238 The affected zones are: Africa/Blantyre, Africa/Bujumbura, 2239 Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi, 2240 Africa/Lusaka, Africa/Maseru, and Africa/Mbabane. 2241 2242 Changes affecting code 2243 2244 zdump -V and -v now output gmtoff= values on all platforms, 2245 not merely on platforms defining TM_GMTOFF. 2246 2247 The tz library's localtime and mktime functions now set tzname to a value 2248 appropriate for the requested timestamp, and zdump now uses this 2249 on platforms not defining TM_ZONE, fixing a 2014g regression. 2250 (Thanks to Tim Parenti for reporting the problem.) 2251 2252 The tz library no longer sets tzname if localtime or mktime fails. 2253 2254 zdump -c no longer mishandles transitions near year boundaries. 2255 (Thanks to Tim Parenti for reporting the problem.) 2256 2257 An access to uninitialized data has been fixed. 2258 (Thanks to Jrg Richter for reporting the problem.) 2259 2260 When THREAD_SAFE is defined, the code ports to the C11 memory model. 2261 A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined 2262 and two threads race to initialize data used by gmtime-like functions. 2263 (Thanks to Andy Heninger for reporting the problems.) 2264 2265 Changes affecting build procedure 2266 2267 'make check' now checks better for properly-sorted data. 2268 2269 Changes affecting documentation and commentary 2270 2271 zdump's gmtoff=N output is now documented, and its isdst=D output 2272 is now documented to possibly output D values other than 0 or 1. 2273 2274 zdump -c's treatment of years is now documented to use the 2275 Gregorian calendar and Universal Time without leap seconds, 2276 and its behavior at cutoff boundaries is now documented better. 2277 (Thanks to Arthur David Olson and Tim Parenti for reporting the problems.) 2278 2279 Programs are now documented to use the proleptic Gregorian calendar. 2280 (Thanks to Alan Barrett for the suggestion.) 2281 2282 Fractional-second GMT offsets have been documented for civil time 2283 in 19th-century Chennai, Jakarta, and New York. 2284 2285 2286 Release 2014g - 2014-08-28 12:31:23 -0700 2287 2288 Changes affecting future timestamps 2289 2290 Turks & Caicos is switching from US eastern time to UT -04 2291 year-round, modeled as a switch on 2014-11-02 at 02:00. 2292 [As noted in 2014j, this switch was later delayed.] 2293 2294 Changes affecting past timestamps 2295 2296 Time in Russia or the USSR before 1926 or so has been corrected by 2297 a few seconds in the following zones: Asia/Irkutsk, 2298 Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi, 2299 Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara. For 2300 Asia/Yekaterinburg the correction is a few minutes. (Thanks to 2301 Vladimir Karpinsky.) 2302 2303 The Portuguese decree of 1911-05-26 took effect on 1912-01-01. 2304 This affects 1911 timestamps in Africa/Bissau, Africa/Luanda, 2305 Atlantic/Azores, and Atlantic/Madeira. Also, Lisbon's pre-1912 2306 GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32. 2307 (Thanks to Stephen Colebourne for pointing to the decree.) 2308 2309 Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59. 2310 2311 A new file 'backzone' contains data which may appeal to 2312 connoisseurs of old timestamps, although it is out of scope for 2313 the tz database, is often poorly sourced, and contains some data 2314 that is known to be incorrect. The new file is not recommended 2315 for ordinary use and its entries are not installed by default. 2316 (Thanks to Lester Caine for the high-quality Jersey, Guernsey, and 2317 Isle of Man entries.) 2318 2319 Some more zones have been turned into links, when they differed 2320 from existing zones only for older timestamps. As usual, 2321 these changes affect UT offsets in pre-1970 timestamps only. 2322 Their old contents have been moved to the 'backzone' file. 2323 The affected zones are: Africa/Bangui, Africa/Brazzaville, 2324 Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda, 2325 Africa/Malabo, Africa/Niamey, and Africa/Porto-Novo. 2326 2327 Changes affecting code 2328 2329 Unless NETBSD_INSPIRED is defined to 0, the tz library now 2330 supplies functions for creating and using objects that represent 2331 timezones. The new functions are tzalloc, tzfree, localtime_rz, 2332 mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and 2333 time2posix_z. They are intended for performance: for example, 2334 localtime_rz (unlike localtime_r) is trivially thread-safe without 2335 locking. (Thanks to Christos Zoulas for proposing NetBSD-inspired 2336 functions, and to Alan Barrett and Jonathan Lennox for helping to 2337 debug the change.) 2338 2339 zdump now builds with the tz library unless USE_LTZ is defined to 0, 2340 This lets zdump use tz features even if the system library lacks them. 2341 To build zdump with the system library, use 'make CFLAGS=-DUSE_LTZ=0 2342 TZDOBJS=zdump.o CHECK_TIME_T_ALTERNATIVES='. 2343 2344 zdump now uses localtime_rz if available, as it's significantly faster, 2345 and it can help zdump better diagnose invalid timezone names. 2346 Define HAVE_LOCALTIME_RZ to 0 to suppress this. HAVE_LOCALTIME_RZ 2347 defaults to 1 if NETBSD_INSPIRED && USE_LTZ. When localtime_rz is 2348 not available, zdump now uses localtime_r and tzset if available, 2349 as this is a bit cleaner and faster than plain localtime. Compile 2350 with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system 2351 lacks these two functions. 2352 2353 If THREAD_SAFE is defined to 1, the tz library is now thread-safe. 2354 Although not needed for tz's own applications, which are single-threaded, 2355 this supports POSIX better if the tz library is used in multithreaded apps. 2356 2357 Some crashes have been fixed when zdump or the tz library is given 2358 invalid or outlandish input. 2359 2360 The tz library no longer mishandles leap seconds on platforms with 2361 unsigned time_t in timezones that lack ordinary transitions after 1970. 2362 2363 The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not 2364 already defined, to make it easier to configure on common platforms. 2365 Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this. 2366 2367 Unless the new macro UNINIT_TRAP is defined to 1, the tz code now 2368 assumes that reading uninitialized memory yields garbage values 2369 but does not cause other problems such as traps. 2370 2371 If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now 2372 more likely to guess right for ambiguous timestamps near 2373 transitions where tm_isdst does not change. 2374 2375 If HAVE_STRFTIME_L is defined to 1, the tz library now defines 2376 strftime_l for compatibility with recent versions of POSIX. 2377 Only the C locale is supported, though. HAVE_STRFTIME_L defaults 2378 to 1 on recent POSIX versions, and to 0 otherwise. 2379 2380 tzselect -c now uses a hybrid distance measure that works better 2381 in Africa. (Thanks to Alan Barrett for noting the problem.) 2382 2383 The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used, 2384 or when time_tz is defined. 2385 2386 When HAVE_UTMPX_H is set the 'date' command now builds on systems 2387 whose <utmpx.h> file does not define WTMPX_FILE, and when setting 2388 the date it updates the wtmpx file if _PATH_WTMPX is defined. 2389 This affects GNU/Linux and similar systems. 2390 2391 For easier maintenance later, some C code has been simplified, 2392 some lint has been removed, and the code has been tweaked so that 2393 plain 'make' is more likely to work. 2394 2395 The C type 'bool' is now used for boolean values, instead of 'int'. 2396 2397 The long-obsolete LOCALE_HOME code has been removed. 2398 2399 The long-obsolete 'gtime' function has been removed. 2400 2401 Changes affecting build procedure 2402 2403 'zdump' no longer links in ialloc.o, as it's not needed. 2404 2405 'make check_time_t_alternatives' no longer assumes GNU diff. 2406 2407 Changes affecting distribution tarballs 2408 2409 The files checktab.awk and zoneinfo2tdf.pl are now distributed in 2410 the tzdata tarball instead of the tzcode tarball, since they help 2411 maintain the data. The NEWS and Theory files are now also 2412 distributed in the tzdata tarball, as they're relevant for data. 2413 (Thanks to Alan Barrett for pointing this out.) Also, the 2414 leapseconds.awk file is no longer distributed in the tzcode 2415 tarball, since it belongs in the tzdata tarball (where 2014f 2416 inadvertently also distributed it). 2417 2418 Changes affecting documentation and commentary 2419 2420 A new file CONTRIBUTING is distributed. (Thanks to Tim Parenti for 2421 suggesting a CONTRIBUTING file, and to Tony Finch and Walter Harms 2422 for debugging it.) 2423 2424 The man pages have been updated to use function prototypes, 2425 to document thread-safe variants like localtime_r, and to document 2426 the NetBSD-inspired functions tzalloc, tzfree, localtime_rz, and 2427 mktime_z. 2428 2429 The fields in Link lines have been renamed to be more descriptive 2430 and more like the parameters of 'ln'. LINK-FROM has become TARGET, 2431 and LINK-TO has become LINK-NAME. 2432 2433 tz-link.htm mentions the IETF's tzdist working group; Windows 2434 Runtime etc. (thanks to Matt Johnson); and HP-UX's tztab. 2435 2436 Some broken URLs have been fixed in the commentary. (Thanks to 2437 Lester Caine.) 2438 2439 Commentary about Philippines DST has been updated, and commentary 2440 on pre-1970 time in India has been added. 2441 2442 2443 Release 2014f - 2014-08-05 17:42:36 -0700 2444 2445 Changes affecting future timestamps 2446 2447 Russia will subtract an hour from most of its time zones on 2014-10-26 2448 at 02:00 local time. (Thanks to Alexander Krivenyshev.) 2449 There are a few exceptions: Magadan Oblast (Asia/Magadan) and Zabaykalsky 2450 Krai are subtracting two hours; conversely, Chukotka Autonomous Okrug 2451 (Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka), Kemerovo Oblast 2452 (Asia/Novokuznetsk), and the Samara Oblast and the Udmurt Republic 2453 (Europe/Samara) are not changing their clocks. The changed zones are 2454 Europe/Kaliningrad, Europe/Moscow, Europe/Simferopol, Europe/Volgograd, 2455 Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk, 2456 Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Khandyga, 2457 Asia/Sakhalin, and Asia/Ust-Nera; Asia/Magadan will have two hours 2458 subtracted; and Asia/Novokuznetsk's time zone abbreviation is affected, 2459 but not its UTC offset. Two zones are added: Asia/Chita (split 2460 from Asia/Yakutsk, and also with two hours subtracted) and 2461 Asia/Srednekolymsk (split from Asia/Magadan, but with only one hour 2462 subtracted). (Thanks to Tim Parenti for much of the above.) 2463 2464 Changes affecting time zone abbreviations 2465 2466 Australian eastern time zone abbreviations are now AEST/AEDT not EST, 2467 and similarly for the other Australian zones. That is, for eastern 2468 standard and daylight saving time the abbreviations are AEST and AEDT 2469 instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT, 2470 and AWST/AWDT are now used instead of the former CST, CWST, and WST. 2471 This change does not affect UT offsets, only time zone abbreviations. 2472 (Thanks to Rich Tibbett and many others.) 2473 2474 Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07) 2475 effective 2014-10-26 at 02:00 local time. 2476 2477 The time zone abbreviation for Xinjiang Time (observed in rmqi) 2478 has been changed from URUT to XJT. (Thanks to Luther Ma.) 2479 2480 Prefer MSK/MSD for Moscow time in Russia, even in other cities. 2481 Similarly, prefer EET/EEST for eastern European time in Russia. 2482 2483 Change time zone abbreviations in (western) Samoa to use "ST" and 2484 "DT" suffixes, as this is more likely to match common practice. 2485 Prefix "W" to (western) Samoa time when its standard-time offset 2486 disagrees with that of American Samoa. 2487 2488 America/Metlakatla now uses PST, not MeST, to abbreviate its time zone. 2489 2490 Time zone abbreviations have been updated for Japan's two time 2491 zones used 1896-1937. JWST now stands for Western Standard 2492 Time, and JCST for Central Standard Time (formerly this was CJT). 2493 These abbreviations are now used for time in Korea, Taiwan, 2494 and Sakhalin while controlled by Japan. 2495 2496 Changes affecting past timestamps 2497 2498 China's five zones have been simplified to two, since the post-1970 2499 differences in the other three seem to have been imaginary. The 2500 zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been 2501 removed; backwards-compatibility links still work, albeit with 2502 different behaviors for timestamps before May 1980. Asia/Urumqi's 2503 1980 transition to UT +08 has been removed, so that it is now at 2504 +06 and not +08. (Thanks to Luther Ma and to Alois Treindl; 2505 Treindl sent helpful translations of two papers by Guo Qingsheng.) 2506 2507 Some zones have been turned into links, when they differed from existing 2508 zones only for older UT offsets where data entries were likely invented. 2509 These changes affect UT offsets in pre-1970 timestamps only. This is 2510 similar to the change in release 2013e, except this time for western 2511 Africa. The affected zones are: Africa/Bamako, Africa/Banjul, 2512 Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome, 2513 Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, and 2514 Atlantic/St_Helena. This also affects the backwards-compatibility 2515 link Africa/Timbuktu. (Thanks to Alan Barrett, Stephen Colebourne, 2516 Tim Parenti, and David Patte for reporting problems in earlier 2517 versions of this change.) 2518 2519 Asia/Shanghai's pre-standard-time UT offset has been changed from 2520 8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its 2521 transition to standard time has been changed from 1928 to 1901. 2522 2523 Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01, 2524 then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945. 2525 In 1946 it observed DST from 05-15 through 09-30; in 1947 2526 from 04-15 through 10-31; and in 1979 from 07-01 through 09-30. 2527 (Thanks to Yu-Cheng Chuang.) 2528 2529 Asia/Riyadh's transition to standard time is now 1947-03-14, not 1950. 2530 2531 Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not 2532 10-03 at 00:00. (Thanks to Konstantin Hyppnen.) 2533 2534 Pacific/Pago_Pago has been changed from UT -11:30 to -11 for the 2535 period from 1911 to 1950. 2536 2537 Pacific/Chatham has been changed to New Zealand standard time plus 2538 45 minutes for the period before 1957, reflecting a 1956 remark in 2539 the New Zealand parliament. 2540 2541 Europe/Budapest has several pre-1946 corrections: in 1918 the transition 2542 out of DST was on 09-16, not 09-29; in 1919 it was on 11-24, not 09-15; in 2543 1945 it was on 11-01, not 11-03; in 1941 the transition to DST was 04-08 2544 not 04-06 at 02:00; and there was no DST in 1920. 2545 2546 Africa/Accra is now assumed to have observed DST from 1920 through 1935. 2547 2548 Time in Russia before 1927 or so has been corrected by a few seconds in 2549 the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi, 2550 Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg, Europe/Helsinki, and 2551 Europe/Riga. Also, Moscow's location has been changed to its Kilometer 0 2552 point. (Thanks to Vladimir Karpinsky for the Moscow changes.) 2553 2554 Changes affecting data format 2555 2556 A new file 'zone1970.tab' supersedes 'zone.tab' in the installed data. 2557 The new file's extended format allows multiple country codes per zone. 2558 The older file is still installed but is deprecated; its format is 2559 not changing and it will still be distributed for a while, but new 2560 applications should use the new file. 2561 2562 The new file format simplifies maintenance of obscure locations. 2563 To test this, it adds coverage for the Crozet Islands and the 2564 Scattered Islands. (Thanks to Tobias Conradi and Antoine Leca.) 2565 2566 The file 'iso3166.tab' is planned to switch from ASCII to UTF-8. 2567 It is still ASCII now, but commentary about the switch has been added. 2568 The new file 'zone1970.tab' already uses UTF-8. 2569 2570 Changes affecting code 2571 2572 'localtime', 'mktime', etc. now use much less stack space if ALL_STATE 2573 is defined. (Thanks to Elliott Hughes for reporting the problem.) 2574 2575 'zic' no longer mishandles input when ignoring case in locales that 2576 are not compatible with English, e.g., unibyte Turkish locales when 2577 compiled with HAVE_GETTEXT. 2578 2579 Error diagnostics of 'zic' and 'yearistype' have been reworded so that 2580 they no longer use ASCII '-' as if it were a dash. 2581 2582 'zic' now rejects output file names that contain '.' or '..' components. 2583 (Thanks to Tim Parenti for reporting the problem.) 2584 2585 'zic -v' now warns about output file names that do not follow 2586 POSIX rules, or that contain a digit or '.'. (Thanks to Arthur 2587 David Olson for starting the ball rolling on this.) 2588 2589 Some lint has been removed when using GCC_DEBUG_FLAGS with GCC 4.9.0. 2590 2591 Changes affecting build procedure 2592 2593 'zic' no longer links in localtime.o and asctime.o, as they're not needed. 2594 (Thanks to John Cochran.) 2595 2596 Changes affecting documentation and commentary 2597 2598 The 'Theory' file documents legacy names, the longstanding 2599 exceptions to the POSIX-inspired file name rules. 2600 2601 The 'zic' documentation clarifies the role of time types when 2602 interpreting dates. (Thanks to Arthur David Olson.) 2603 2604 Documentation and commentary now prefer UTF-8 to US-ASCII, 2605 allowing the use of proper accents in foreign words and names. 2606 Code and data have not changed because of this. (Thanks to 2607 Garrett Wollman, Ian Abbott, and Guy Harris for helping to debug 2608 this.) 2609 2610 Non-HTML documentation and commentary now use plain-text URLs instead of 2611 HTML insertions, and are more consistent about bracketing URLs when they 2612 are not already surrounded by white space. (Thanks to suggestions by 2613 Steffen Nurpmeso.) 2614 2615 There is new commentary about Xujiahui Observatory, the five time-zone 2616 project in China from 1918 to 1949, timekeeping in Japanese-occupied 2617 Shanghai, and Tibet Time in the 1950s. The sharp-eyed can spot the 2618 warlord Jin Shuren in the data. 2619 2620 Commentary about the coverage of each Russian zone has been standardized. 2621 (Thanks to Tim Parenti.) 2622 2623 There is new commentary about contemporary timekeeping in Ethiopia. 2624 2625 Obsolete comments about a 2007 proposal for DST in Kuwait has been removed. 2626 2627 There is new commentary about time in Poland in 1919. 2628 2629 Proper credit has been given to DST inventor George Vernon Hudson. 2630 2631 Commentary about time in Metlakatla, AK and Resolute, NU has been 2632 improved, with a new source for the former. 2633 2634 In zone.tab, Pacific/Easter no longer mentions Salas y Gmez, as it 2635 is uninhabited. 2636 2637 Commentary about permanent Antarctic bases has been updated. 2638 2639 Several typos have been corrected. (Thanks to Tim Parenti for 2640 contributing some of these fixes.) 2641 2642 tz-link.htm now mentions the JavaScript libraries Moment Timezone, 2643 TimezoneJS.Date, Walltime-js, and Timezone. (Thanks to a heads-up 2644 from Matt Johnson.) Also, it mentions the Go 'latlong' package. 2645 (Thanks to a heads-up from Dirkjan Ochtman.) 2646 2647 The files usno1988, usno1989, usno1989a, usno1995, usno1997, and usno1998 2648 have been removed. These obsolescent US Naval Observatory entries were no 2649 longer helpful for maintenance. (Thanks to Tim Parenti for the suggestion.) 2650 2651 2652 Release 2014e - 2014-06-12 21:53:52 -0700 2653 2654 Changes affecting near-future timestamps 2655 2656 Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00. 2657 (Thanks to Imed Chihi.) Guess that from 2015 on Egypt will temporarily 2658 switch to standard time at 24:00 the last Thursday before Ramadan, and 2659 back to DST at 00:00 the first Friday after Ramadan. 2660 2661 Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00. (Thanks 2662 to Milamber Space Network.) Guess that from 2015 on Morocco will 2663 temporarily switch to standard time at 03:00 the last Saturday before 2664 Ramadan, and back to DST at 02:00 the first Saturday after Ramadan. 2665 2666 Changes affecting past timestamps 2667 2668 The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of 2669 "MSD" for Moscow's double daylight time in summer 1921. Also, a typo 2670 "VLASST" has been repaired to be "VLAST" for Vladivostok summer time 2671 in 1991. (Thanks to Hank W. for reporting the problems.) 2672 2673 Changes affecting commentary 2674 2675 tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the 2676 draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and 2677 removes stale pointers to World Time Explorer and WORLDTIME. 2678 2679 2680 Release 2014d - 2014-05-27 21:34:40 -0700 2681 2682 Changes affecting code 2683 2684 zic no longer generates files containing timestamps before the Big Bang. 2685 This works around GNOME glib bug 878 2686 <https://gitlab.gnome.org/GNOME/glib/issues/878> 2687 (Thanks to Leonardo Chiquitto for reporting the bug, and to 2688 Arthur David Olson and James Cloos for suggesting improvements to the fix.) 2689 2690 Changes affecting documentation 2691 2692 tz-link.htm now mentions GNOME. 2693 2694 2695 Release 2014c - 2014-05-13 07:44:13 -0700 2696 2697 Changes affecting near-future timestamps 2698 2699 Egypt observes DST starting 2014-05-15 at 24:00. 2700 (Thanks to Ahmad El-Dardiry and Gunther Vermier.) 2701 Details have not been announced, except that DST will not be observed 2702 during Ramadan. Guess that DST will stop during the same Ramadan dates as 2703 Morocco, and that Egypt's future spring and fall transitions will be the 2704 same as 2010 when it last observed DST, namely April's last Friday at 2705 00:00 to September's last Thursday at 23:00 standard time. Also, guess 2706 that Ramadan transitions will be at 00:00 standard time. 2707 2708 Changes affecting code 2709 2710 zic now generates transitions for minimum time values, eliminating guesswork 2711 when handling low-valued timestamps. (Thanks to Arthur David Olson.) 2712 2713 Port to Cygwin sans glibc. (Thanks to Arthur David Olson.) 2714 2715 Changes affecting commentary and documentation 2716 2717 Remove now-confusing comment about Jordan. (Thanks to Oleksii Nochovnyi.) 2718 2719 2720 Release 2014b - 2014-03-24 21:28:50 -0700 2721 2722 Changes affecting near-future timestamps 2723 2724 Crimea switches to Moscow time on 2014-03-30 at 02:00 local time. 2725 (Thanks to Alexander Krivenyshev.) Move its zone.tab entry from UA to RU. 2726 2727 New entry for Troll station, Antarctica. (Thanks to Paul-Inge Flakstad and 2728 Bengt-Inge Larsson.) This is currently an approximation; a better version 2729 will require the zic and localtime fixes mentioned below, and the plan is 2730 to wait for a while until at least the zic fixes propagate. 2731 2732 Changes affecting code 2733 2734 'zic' and 'localtime' no longer reject locations needing four transitions 2735 per year for the foreseeable future. (Thanks to Andrew Main (Zefram).) 2736 Also, 'zic' avoids some unlikely failures due to integer overflow. 2737 2738 Changes affecting build procedure 2739 2740 'make check' now detects Rule lines defined but never used. 2741 The NZAQ rules, an instance of this problem, have been removed. 2742 2743 Changes affecting commentary and documentation 2744 2745 Fix Tuesday/Thursday typo in description of time in Israel. 2746 (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.) 2747 2748 Microsoft Windows 8.1 doesn't support tz database names. (Thanks 2749 to Donald MacQueen.) Instead, the Microsoft Windows Store app 2750 library supports them. 2751 2752 Add comments about Johnston Island time in the 1960s. 2753 (Thanks to Lyle McElhaney.) 2754 2755 Morocco's 2014 DST start will be as predicted. 2756 (Thanks to Sebastien Willemijns.) 2757 2758 2759 Release 2014a - 2014-03-07 23:30:29 -0800 2760 2761 Changes affecting near-future timestamps 2762 2763 Turkey begins DST on 2014-03-31, not 03-30. (Thanks to Faruk Pasin for 2764 the heads-up, and to Tim Parenti for simplifying the update.) 2765 2766 Changes affecting past timestamps 2767 2768 Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00. 2769 (Thanks to Steffen Thorsen.) 2770 2771 Ukraine switched from Moscow to Eastern European time on 1990-07-01 2772 (not 1992-01-01), and observed DST during the entire next winter. 2773 (Thanks to Vladimir in Moscow via Alois Treindl.) 2774 2775 In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03. 2776 (Thanks to Avigdor Finkelstein.) 2777 2778 Changes affecting code 2779 2780 A uninitialized-storage bug in 'localtime' has been fixed. 2781 (Thanks to Logan Chien.) 2782 2783 Changes affecting the build procedure 2784 2785 The settings for 'make check_web' now default to Ubuntu 13.10. 2786 2787 Changes affecting commentary and documentation 2788 2789 The boundary of the US Pacific time zone is given more accurately. 2790 (Thanks to Alan Mintz.) 2791 2792 Chile's 2014 DST will be as predicted. (Thanks to Jos Miguel Garrido.) 2793 2794 Paraguay's 2014 DST will be as predicted. (Thanks to Carlos Ral Perasso.) 2795 2796 Better descriptions of countries with same time zone history as 2797 Trinidad and Tobago since 1970. (Thanks to Alan Barrett for suggestion.) 2798 2799 Several changes affect tz-link.htm, the main web page. 2800 2801 Mention Time.is (thanks to Even Scharning) and WX-now (thanks to 2802 David Braverman). 2803 2804 Mention xCal (Internet RFC 6321) and jCal. 2805 2806 Microsoft has some support for tz database names. 2807 2808 CLDR data formats include both XML and JSON. 2809 2810 Mention Maggiolo's map of solar vs standard time. 2811 (Thanks to Arthur David Olson.) 2812 2813 Mention TZ4Net. (Thanks to Matt Johnson.) 2814 2815 Mention the timezone-olson Haskell package. 2816 2817 Mention zeitverschiebung.net. (Thanks to Martin Jger.) 2818 2819 Remove moribund links to daylight-savings-time.info and to 2820 Simple Timer + Clocks. 2821 2822 Update two links. (Thanks to Oscar van Vlijmen.) 2823 2824 Fix some formatting glitches, e.g., remove random newlines from 2825 abbr elements' title attributes. 2826 2827 2828 Release 2013i - 2013-12-17 07:25:23 -0800 2829 2830 Changes affecting near-future timestamps: 2831 2832 Jordan switches back to standard time at 00:00 on December 20, 2013. 2833 The 2006-2011 transition schedule is planned to resume in 2014. 2834 (Thanks to Steffen Thorsen.) 2835 2836 Changes affecting past timestamps: 2837 2838 In 2004, Cuba began DST on March 28, not April 4. 2839 (Thanks to Steffen Thorsen.) 2840 2841 Changes affecting code 2842 2843 The compile-time flag NOSOLAR has been removed, as nowadays the 2844 benefit of slightly shrinking runtime table size is outweighed by the 2845 cost of disallowing potential future updates that exceed old limits. 2846 2847 Changes affecting documentation and commentary 2848 2849 The files solar87, solar88, and solar89 are no longer distributed. 2850 They were a negative experiment - that is, a demonstration that 2851 tz data can represent solar time only with some difficulty and error. 2852 Their presence in the distribution caused confusion, as Riyadh 2853 civil time was generally not solar time in those years. 2854 2855 tz-link.htm now mentions Noda Time. (Thanks to Matt Johnson.) 2856 2857 2858 Release 2013h - 2013-10-25 15:32:32 -0700 2859 2860 Changes affecting current and future timestamps: 2861 2862 Libya has switched its UT offset back to +02 without DST, instead 2863 of +01 with DST. (Thanks to Even Scharning.) 2864 2865 Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules. 2866 (Thanks to Gwillim Law.) 2867 2868 Changes affecting future timestamps: 2869 2870 Acre and (we guess) western Amazonas will switch from UT -04 to -05 2871 on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe. 2872 (Thanks to Steffen Thorsen.) 2873 2874 Add entries for DST transitions in Morocco in the year 2038. 2875 This avoids some year-2038 glitches introduced in 2013g. 2876 (Thanks to Yoshito Umaoka for reporting the problem.) 2877 2878 Changes affecting API 2879 2880 The 'tzselect' command no longer requires the 'select' command, 2881 and should now work with /bin/sh on more platforms. It also works 2882 around a bug in BusyBox awk before version 1.21.0. (Thanks to 2883 Patrick 'P. J.' McDermott and Alan Barrett.) 2884 2885 Changes affecting code 2886 2887 Fix localtime overflow bugs with 32-bit unsigned time_t. 2888 2889 zdump no longer assumes sscanf returns maximal values on overflow. 2890 2891 Changes affecting the build procedure 2892 2893 The builder can specify which programs to use, if any, instead of 2894 'ar' and 'ranlib', and libtz.a is now built locally before being 2895 installed. (Thanks to Michael Forney.) 2896 2897 A dependency typo in the 'zdump' rule has been fixed. 2898 (Thanks to Andrew Paprocki.) 2899 2900 The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f' 2901 work as specified by POSIX.2-1992 or later; this is portable nowadays. 2902 2903 'make clean' no longer removes 'leapseconds', since it's 2904 host-independent and is part of the distribution. 2905 2906 The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed. 2907 2908 Changes affecting documentation and commentary 2909 2910 tz-link.htm now mentions TC TIMEZONE's draft time zone service protocol 2911 (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle). 2912 2913 Update URLs in tz-link page. Add URLs for Microsoft Windows, since 2914 8.1 introduces tz support. Remove URLs for Tru64 and UnixWare (no 2915 longer maintained) and for old advisories. SOFA now does C. 2916 2917 Release 2013g - 2013-09-30 21:08:26 -0700 2918 2919 Changes affecting current and near-future timestamps 2920 2921 Morocco now observes DST from the last Sunday in March to the last 2922 Sunday in October, not April to September respectively. (Thanks 2923 to Steffen Thorsen.) 2924 2925 Changes affecting 'zic' 2926 2927 'zic' now runs on platforms that lack both hard links and symlinks. 2928 (Thanks to Theo Veenker for reporting the problem, for MinGW.) 2929 Also, fix some bugs on platforms that lack hard links but have symlinks. 2930 2931 'zic -v' again warns that Asia/Tehran has no POSIX environment variable 2932 to predict the far future, fixing a bug introduced in 2013e. 2933 2934 Changes affecting the build procedure 2935 2936 The 'leapseconds' file is again put into the tzdata tarball. 2937 Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to 2938 Matt Burgess and Ian Abbott.) The timestamps of these and other 2939 dependent files in tarballs are adjusted more consistently. 2940 2941 Changes affecting documentation and commentary 2942 2943 The README file is now part of the data tarball as well as the code. 2944 It now states that files are public domain unless otherwise specified. 2945 (Thanks to Andrew Main (Zefram) for asking for clarifications.) 2946 Its details about the 1989 release moved to a place of honor near 2947 the end of NEWS. 2948 2949 2950 Release 2013f - 2013-09-24 23:37:36 -0700 2951 2952 Changes affecting near-future timestamps 2953 2954 Tocantins will very likely not observe DST starting this spring. 2955 (Thanks to Steffen Thorsen.) 2956 2957 Jordan will likely stay at UT +03 indefinitely, and will not fall 2958 back this fall. 2959 2960 Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.) 2961 2962 Changes affecting API 2963 2964 The types of the global variables 'timezone' and 'altzone' (if present) 2965 have been changed back to 'long'. This is required for 'timezone' 2966 by POSIX, and for 'altzone' by common practice, e.g., Solaris 11. 2967 These variables were originally 'long' in the tz code, but were 2968 mistakenly changed to 'time_t' in 1987; nobody reported the 2969 incompatibility until now. The difference matters on x32, where 2970 'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.) 2971 2972 Changes affecting the build procedure 2973 2974 Avoid long strings in leapseconds.awk to work around a mawk bug. 2975 (Thanks to Cyril Baurand.) 2976 2977 Changes affecting documentation and commentary 2978 2979 New file 'NEWS' that contains release notes like this one. 2980 2981 Paraguay's law does not specify DST transition time; 00:00 is customary. 2982 (Thanks to Waldemar Villamayor-Venialbo.) 2983 2984 Minor capitalization fixes. 2985 2986 Changes affecting version-control only 2987 2988 The experimental GitHub repository now contains annotated and 2989 signed tags for recent releases, e.g., '2013e' for Release 2013e. 2990 Releases are tagged starting with 2012e; earlier releases were 2991 done differently, and tags would either not have a simple name or 2992 not exactly match what was released. 2993 2994 'make set-timestamps' is now simpler and a bit more portable. 2995 2996 2997 Release 2013e - 2013-09-19 23:50:04 -0700 2998 2999 Changes affecting near-future timestamps 3000 3001 This year Fiji will start DST on October 27, not October 20. 3002 (Thanks to David Wheeler for the heads-up.) For now, guess that 3003 Fiji will continue to spring forward the Sunday before the fourth 3004 Monday in October. 3005 3006 Changes affecting current and future time zone abbreviations 3007 3008 Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian 3009 time zone abbreviations since 1932. (Thanks to George Ziegler, 3010 Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and 3011 Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura, 3012 Asia/Makassar, and Asia/Pontianak. 3013 3014 Use ART (UT -03, standard time), rather than WARST (also -03, but 3015 daylight saving time) for San Luis, Argentina since 2009. 3016 3017 Changes affecting Godthb timestamps after 2037 if version mismatch 3018 3019 Allow POSIX-like TZ strings where the transition time's hour can 3020 range from -167 through 167, instead of the POSIX-required 0 3021 through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the 3022 new Fiji rules. This is a more-compact way to represent 3023 far-future timestamps for America/Godthab, America/Santiago, 3024 Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem, 3025 Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by 3026 this change. (Derived from a suggestion by Arthur David Olson.) 3027 3028 Allow POSIX-like TZ strings where daylight saving time is in 3029 effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western 3030 Argentina Summer Time all year. This supports a more-compact way 3031 to represent the 2013d data for America/Argentina/San_Luis. 3032 Because of the change for San Luis noted above this change does not 3033 affect the current data. (Thanks to Andrew Main (Zefram) for 3034 suggestions that improved this change.) 3035 3036 Where these two TZ changes take effect, there is a minor extension 3037 to the tz file format in that it allows new values for the 3038 embedded TZ-format string, and the tz file format version number 3039 has therefore been increased from 2 to 3 as a precaution. 3040 Version-2-based client code should continue to work as before for 3041 all timestamps before 2038. Existing version-2-based client code 3042 (tzcode, GNU/Linux, Solaris) has been tested on version-3-format 3043 files, and typically works in practice even for timestamps after 3044 2037; the only known exception is America/Godthab. 3045 3046 Changes affecting timestamps before 1970 3047 3048 Pacific/Johnston is now a link to Pacific/Honolulu. This corrects 3049 some errors before 1947. 3050 3051 Some zones have been turned into links, when they differ from existing 3052 zones only in older data entries that were likely invented or that 3053 differ only in LMT or transitions from LMT. These changes affect 3054 only timestamps before 1943. The affected zones are: 3055 Africa/Juba, America/Anguilla, America/Aruba, America/Dominica, 3056 America/Grenada, America/Guadeloupe, America/Marigot, 3057 America/Montserrat, America/St_Barthelemy, America/St_Kitts, 3058 America/St_Lucia, America/St_Thomas, America/St_Vincent, 3059 America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for 3060 confirming that the old Europe/Vaduz zone was wrong and the new 3061 link is better for WWII-era times.) 3062 3063 Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects 3064 America/Cayman, America/Jamaica and America/Grand_Turk timestamps 3065 from 1890 to 1912. 3066 3067 Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46. 3068 This affects Europe/Zurich timestamps from 1853 to 1894. (Thanks 3069 to Alois Treindl.) 3070 3071 Change the date of the circa-1850 Zurich transition from 1849-09-12 3072 to 1853-07-16, overriding Shanks with data from Messerli about 3073 postal and telegraph time in Switzerland. 3074 3075 Changes affecting time zone abbreviations before 1970 3076 3077 For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932, 3078 as Jakarta was called Batavia back then. 3079 3080 Changes affecting API 3081 3082 The 'zic' command now outputs a dummy transition when far-future 3083 data can't be summarized using a TZ string, and uses a 402-year 3084 window rather than a 400-year window. For the current data, this 3085 affects only the Asia/Tehran file. It does not affect any of the 3086 timestamps that this file represents, so zdump outputs the same 3087 information as before. (Thanks to Andrew Main (Zefram).) 3088 3089 The 'date' command has a new '-r' option, which lets you specify 3090 the integer time to display, a la FreeBSD. 3091 3092 The 'tzselect' command has two new options '-c' and '-n', which lets you 3093 select a zone based on latitude and longitude. 3094 3095 The 'zic' command's '-v' option now warns about constructs that 3096 require the new version-3 binary file format. (Thanks to Arthur 3097 David Olson for the suggestion.) 3098 3099 Support for floating-point time_t has been removed. 3100 It was always dicey, and POSIX no longer requires it. 3101 (Thanks to Eric Blake for suggesting to the POSIX committee to 3102 remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy 3103 Heninger, Arthur David Olson, and Alois Treindl, for reporting 3104 bugs and elucidating some of the corners of the old floating-point 3105 implementation.) 3106 3107 The signatures of 'offtime', 'timeoff', and 'gtime' have been 3108 changed back to the old practice of using 'long' to represent UT 3109 offsets. This had been inadvertently and mistakenly changed to 3110 'int_fast32_t'. (Thanks to Christos Zoulas.) 3111 3112 The code avoids undefined behavior on integer overflow in some 3113 more places, including gmtime, localtime, mktime and zdump. 3114 3115 Changes affecting the zdump utility 3116 3117 zdump now outputs "UT" when referring to Universal Time, not "UTC". 3118 "UTC" does not make sense for timestamps that predate the introduction 3119 of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen 3120 for clarifying UT vs UTC.) 3121 3122 Data changes affecting behavior of tzselect and similar programs 3123 3124 Country code BQ is now called the more-common name "Caribbean Netherlands" 3125 rather than the more-official "Bonaire, St Eustatius & Saba". 3126 3127 Remove from zone.tab the names America/Montreal, America/Shiprock, 3128 and Antarctica/South_Pole, as they are equivalent to existing 3129 same-country-code zones for post-1970 timestamps. The data entries for 3130 these names are unchanged, so the names continue to work as before. 3131 3132 Changes affecting code internals 3133 3134 zic -c now runs way faster on 64-bit hosts when given large numbers. 3135 3136 zic now uses vfprintf to avoid allocating and freeing some memory. 3137 3138 tzselect now computes the list of continents from the data, 3139 rather than have it hard-coded. 3140 3141 Minor changes pacify GCC 4.7.3 and GCC 4.8.1. 3142 3143 Changes affecting the build procedure 3144 3145 The 'leapseconds' file is now generated automatically from a 3146 new file 'leap-seconds.list', which is a copy of 3147 <ftp://ftp.nist.gov/pub/time/leap-seconds.list> 3148 A new source file 'leapseconds.awk' implements this. 3149 The goal is simplification of the future maintenance of 'leapseconds'. 3150 3151 When building the 'posix' or 'right' subdirectories, if the 3152 subdirectory would be a copy of the default subdirectory, it is 3153 now made a symbolic link if that is supported. This saves about 3154 2 MB of file system space. 3155 3156 The links America/Shiprock and Antarctica/South_Pole have been 3157 moved to the 'backward' file. This affects only nondefault builds 3158 that omit 'backward'. 3159 3160 Changes affecting version-control only 3161 3162 .gitignore now ignores 'date'. 3163 3164 Changes affecting documentation and commentary 3165 3166 Changes to the 'tzfile' man page 3167 3168 It now mentions that the binary file format may be extended in 3169 future versions by appending data. 3170 3171 It now refers to the 'zdump' and 'zic' man pages. 3172 3173 Changes to the 'zic' man page 3174 3175 It lists conditions that elicit a warning with '-v'. 3176 3177 It says that the behavior is unspecified when duplicate names 3178 are given, or if the source of one link is the target of another. 3179 3180 Its examples are updated to match the latest data. 3181 3182 The definition of white space has been clarified slightly. 3183 (Thanks to Michael Deckers.) 3184 3185 Changes to the 'Theory' file 3186 3187 There is a new section about the accuracy of the tz database, 3188 describing the many ways that errors can creep in, and 3189 explaining why so many of the pre-1970 timestamps are wrong or 3190 misleading (thanks to Steve Allen, Lester Caine, and Garrett 3191 Wollman for discussions that contributed to this). 3192 3193 The 'Theory' file describes LMT better (this follows a 3194 suggestion by Guy Harris). 3195 3196 It refers to the 2013 edition of POSIX rather than the 2004 edition. 3197 3198 It's mentioned that excluding 'backward' should not affect the 3199 other data, and it suggests at least one zone.tab name per 3200 inhabited country (thanks to Stephen Colebourne). 3201 3202 Some longstanding restrictions on names are documented, e.g., 3203 'America/New_York' precludes 'America/New_York/Bronx'. 3204 3205 It gives more reasons for the 1970 cutoff. 3206 3207 It now mentions which time_t variants are supported, such as 3208 signed integer time_t. (Thanks to Paul Goyette for reporting 3209 typos in an experimental version of this change.) 3210 3211 (Thanks to Philip Newton for correcting typos in these changes.) 3212 3213 Documentation and commentary is more careful to distinguish UT in 3214 general from UTC in particular. (Thanks to Steve Allen.) 3215 3216 Add a better source for the Zurich 1894 transition. 3217 (Thanks to Pierre-Yves Berger.) 3218 3219 Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.) 3220 3221 3222 Release 2013d - 2013-07-05 07:38:01 -0700 3223 3224 Changes affecting future timestamps: 3225 3226 Morocco's midsummer transitions this year are July 7 and August 10, 3227 not July 9 and August 8. (Thanks to Andrew Paprocki.) 3228 3229 Israel now falls back on the last Sunday of October. 3230 (Thanks to Ephraim Silverberg.) 3231 3232 Changes affecting past timestamps: 3233 3234 Specify Jerusalem's location more precisely; this changes the pre-1880 3235 times by 2 s. 3236 3237 Changing affecting metadata only: 3238 3239 Fix typos in the entries for country codes BQ and SX. 3240 3241 Changes affecting code: 3242 3243 Rework the code to fix a bug with handling Australia/Macquarie on 3244 32-bit hosts (thanks to Arthur David Olson). 3245 3246 Port to platforms like NetBSD, where time_t can be wider than long. 3247 3248 Add support for testing time_t types other than the system's. 3249 Run 'make check_time_t_alternatives' to try this out. 3250 Currently, the tests fail for unsigned time_t; 3251 this should get fixed at some point. 3252 3253 Changes affecting documentation and commentary: 3254 3255 Deemphasize the significance of national borders. 3256 3257 Update the zdump man page. 3258 3259 Remove obsolete NOID comment (thanks to Denis Excoffier). 3260 3261 Update several URLs and comments in the web pages. 3262 3263 Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler). 3264 3265 Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka). 3266 3267 3268 Release 2013c - 2013-04-19 16:17:40 -0700 3269 3270 Changes affecting current and future timestamps: 3271 3272 Palestine observed DST starting March 29, 2013. (Thanks to 3273 Steffen Thorsen.) From 2013 on, Gaza and Hebron both observe DST, 3274 with the predicted rules being the last Thursday in March at 24:00 3275 to the first Friday on or after September 21 at 01:00. 3276 3277 Assume that the recent change to Paraguay's DST rules is permanent, 3278 by moving the end of DST to the 4th Sunday in March every year. 3279 (Thanks to Carlos Ral Perasso.) 3280 3281 Changes affecting past timestamps: 3282 3283 Fix some historical data for Palestine to agree with that of 3284 timeanddate.com, as follows: 3285 3286 The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not 3287 00:00 Apr 1. 3288 3289 The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not 3290 02:00. 3291 3292 The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27. 3293 3294 The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2. 3295 3296 The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01. 3297 3298 The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00. 3299 3300 Fix times of habitation for Macquarie to agree with the Tasmania 3301 Parks & Wildlife Service history, which indicates that permanent 3302 habitation was 1899-1919 and 1948 on. 3303 3304 Changing affecting metadata only: 3305 3306 Macquarie Island is politically part of Australia, not Antarctica. 3307 (Thanks to Tobias Conradi.) 3308 3309 Sort Macquarie more-consistently with other parts of Australia. 3310 (Thanks to Tim Parenti.) 3311 3312 3313 Release 2013b - 2013-03-10 22:33:40 -0700 3314 3315 Changes affecting current and future timestamps: 3316 3317 Haiti uses US daylight-saving rules this year, and presumably future years. 3318 This changes timestamps starting today. (Thanks to Steffen Thorsen.) 3319 3320 Paraguay will end DST on March 24 this year. 3321 (Thanks to Steffen Thorsen.) For now, assume it's just this year. 3322 3323 Morocco does not observe DST during Ramadan; 3324 try to predict Ramadan in Morocco as best we can. 3325 (Thanks to Erik Homoet for the heads-up.) 3326 3327 Changes affecting commentary: 3328 3329 Update URLs in tz-link page. Add URLs for webOS, BB10, iOS. 3330 Update URL for Solaris. Mention Internet RFC 6557. 3331 Update Internet RFCs 2445->5545, 2822->5322. 3332 Switch from FTP to HTTP for Internet RFCs. 3333 3334 3335 Release 2013a - 2013-02-27 09:20:35 -0800 3336 3337 Change affecting binary data format: 3338 3339 The zone offset at the end of version-2-format zone files is now 3340 allowed to be 24:00, as per POSIX.1-2008. (Thanks to Arthur David Olson.) 3341 3342 Changes affecting current and future timestamps: 3343 3344 Chile's 2013 rules, and we guess rules for 2014 and later, will be 3345 the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC. 3346 (Thanks to Steffen Thorsen and Robert Elz.) 3347 3348 New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen. 3349 (Thanks to Tobias Conradi and Arthur David Olson.) 3350 3351 Many changes affect historical timestamps before 1940. 3352 These were deduced from: Milne J. Civil time. Geogr J. 1899 3353 Feb;13(2):173-94 <https://www.jstor.org/stable/1774359>. 3354 3355 Changes affecting the code: 3356 3357 Fix zic bug that mishandled Egypt's 2010 changes (this also affected 3358 the data). (Thanks to Arthur David Olson.) 3359 3360 Fix localtime bug when time_t is unsigned and data files were generated 3361 by a signed time_t system. (Thanks to Doug Bailey for reporting and 3362 to Arthur David Olson for fixing.) 3363 3364 Allow the email address for bug reports to be set by the packager. 3365 The default is tz (a] iana.org, as before. (Thanks to Joseph S. Myers.) 3366 3367 Update HTML checking to be compatible with Ubuntu 12.10. 3368 3369 Check that files are a safe subset of ASCII. At some point we may 3370 relax this requirement to a safe subset of UTF-8. Without the 3371 check, some non-UTF-8 encodings were leaking into the distribution. 3372 3373 Commentary changes: 3374 3375 Restore a comment about copyright notices that was inadvertently deleted. 3376 (Thanks to Arthur David Olson.) 3377 3378 Improve the commentary about which districts observe what times 3379 in Russia. (Thanks to Oscar van Vlijmen and Arthur David Olson.) 3380 3381 Add web page links to tz.js. 3382 3383 Add "Run by the Monkeys" to tz-art. (Thanks to Arthur David Olson.) 3384 3385 3386 Release 2012j - 2012-11-12 18:34:49 -0800 3387 3388 Libya moved to CET this weekend, but with DST planned next year. 3389 (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.) 3390 3391 Signatures now have the extension .asc, not .sign, as that's more 3392 standard. (Thanks to Phil Pennock.) 3393 3394 The output of 'zdump --version', and of 'zic --version', now 3395 uses a format that is more typical for --version. 3396 (Thanks to Joseph S. Myers.) 3397 3398 The output of 'tzselect --help', 'zdump --help', and 'zic --help' 3399 now uses tz (a] iana.org rather than the old elsie address. 3400 3401 zic -v now complains about abbreviations that are less than 3 3402 or more than 6 characters, as per Posix. Formerly, it checked 3403 for abbreviations that were more than 3. 3404 3405 'make public' no longer puts its temporary directory under /tmp, 3406 and uses the just-built zic rather than the system zic. 3407 3408 Various fixes to documentation and commentary. 3409 3410 3411 Release 2012i - 2012-11-03 12:57:09 -0700 3412 3413 Cuba switches from DST tomorrow at 01:00. (Thanks to Steffen Thorsen.) 3414 3415 Linker flags can now be specified via LDFLAGS. 3416 AWK now defaults to 'awk', not 'nawk'. 3417 The shell in tzselect now defaults to /bin/bash, but this can 3418 be overridden by specifying KSHELL. 3419 The main web page now mentions the unofficial GitHub repository. 3420 (Thanks to Mike Frysinger.) 3421 3422 Tarball signatures can now be built by running 'make signatures'. 3423 There are also new makefile rules 'tarballs', 'check_public', and 3424 separate makefile rules for each tarball and signature file. 3425 A few makefile rules are now more portable to strict POSIX. 3426 3427 The main web page now lists the canonical IANA URL. 3428 3429 3430 Release 2012h - 2012-10-26 22:49:10 -0700 3431 3432 Bahia no longer has DST. (Thanks to Kelley Cook.) 3433 3434 Tocantins has DST. (Thanks to Rodrigo Severo.) 3435 3436 Israel has new DST rules next year. (Thanks to Ephraim Silverberg.) 3437 3438 Jordan stays on DST this winter. (Thanks to Steffen Thorsen.) 3439 3440 Web page updates. 3441 3442 More C modernization, except that at Arthur David Olson's suggestion 3443 the instances of 'register' were kept. 3444 3445 3446 Release 2012g - 2012-10-17 20:59:45 -0700 3447 3448 Samoa fall 2012 and later. (Thanks to Nicholas Pereira and Robert Elz.) 3449 3450 Palestine fall 2012. (Thanks to Steffen Thorsen.) 3451 3452 Assume C89. 3453 3454 To attack the version-number problem, this release ships the file 3455 'Makefile' (which contains the release number) in both the tzcode and 3456 the tzdata tarballs. The two Makefiles are identical, and should be 3457 identical in any matching pair of tarballs, so it shouldn't matter 3458 which order you extract the tarballs. Perhaps we can come up with a 3459 better version-number scheme at some point; this scheme does have the 3460 virtue of not adding more files. 3461 3462 3463 Release 2012f - 2012-09-12 23:17:03 -0700 3464 3465 * australasia (Pacific/Fiji): Fiji DST is October 21 through January 3466 20 this year. (Thanks to Steffen Thorsen.) 3467 3468 3469 Release 2012e - 2012-08-02 20:44:55 -0700 3470 3471 * australasia (Pacific/Fakaofo): Tokelau is UT +13, not +14. 3472 (Thanks to Steffen Thorsen.) 3473 3474 * Use a single version number for both code and data. 3475 3476 * .gitignore: New file. 3477 3478 * Remove trailing white space. 3479 3480 3481 Release code2012c-data2012d - 2012-07-19 16:35:33 -0700 3482 3483 Changes for Morocco's timestamps, which take effect in a couple of 3484 hours, along with infrastructure changes to accommodate how the tz 3485 code and data are released on IANA. 3486 3487 3488 Release data2012c - 2012-03-27 12:17:25 -0400 3489 3490 africa 3491 Summer time changes for Morocco (to start late April 2012) 3492 3493 asia 3494 Changes for 2012 for Gaza & the West Bank (Hebron) and Syria 3495 3496 northamerica 3497 Haiti following US/Canada rules for 2012 (and we're assuming, 3498 for now anyway, for the future). 3499 3500 3501 Release 2012b - 2012-03-02 12:29:15 +0700 3502 3503 There is just one change to tzcode2012b (compared with 2012a): 3504 the Makefile that was accidentally included with 2012a has been 3505 replaced with the version that should have been there, which is 3506 identical with the previous version (from tzcode2011i). 3507 3508 There are just two changes in tzdata2012b compared with 2012a. 3509 3510 Most significantly, summer time in Cuba has been delayed 3 weeks 3511 (now starts April 1 rather than March 11). Since Mar 11 (the old start 3512 date, as listed in 2012a) is just a little over a week away, this 3513 change is urgent. 3514 3515 Less importantly, an excess tab in one of the changes in zone.tab 3516 in 2012a has been removed. 3517 3518 3519 Release 2012a - 2012-03-01 18:28:10 +0700 3520 3521 The changes in tzcode2012a (compared to the previous version, 2011i) 3522 are entirely to the README and tz-art.htm and tz-link.htm files, if 3523 none of those concern you, you can ignore the code update. The changes 3524 reflect the changed addresses for the mailing list and the code and 3525 data distribution points & methods (and a link to DateTime::TimeZone::Tzfile 3526 has been added to tz-link.htm). 3527 3528 In tzdata2012a (compared to the previous release, which was 2011n) 3529 the major changes are: 3530 Chile 2011/2012 and 2012/2013 summer time date adjustments. 3531 Falkland Islands onto permanent summer time (we're assuming for the 3532 foreseeable future, though 2012 is all we're fairly certain of.) 3533 Armenia has abolished Summer Time. 3534 Tokelau jumped the International Date Line back last December 3535 (just the same as their near neighbour, Samoa). 3536 America/Creston is a new zone for a small area of British Columbia 3537 There will be a leapsecond 2012-06-30 23:59:60 UTC. 3538 3539 Other minor changes are: 3540 Corrections to 1918 Canadian summer time end dates. 3541 Updated URL for UK time zone history (in comments) 3542 A few typos in Le Corre's list of free French place names (comments) 3543 3544 3545 Release data2011n - 2011-10-30 14:57:54 +0700 3546 3547 There are three changes of note - most urgently, Cuba (America/Havana) 3548 has extended summer time by two weeks, now to end on Nov 13, rather than 3549 the (already past) Oct 30. Second, the Pridnestrovian Moldavian Republic 3550 (Europe/Tiraspol) decided not to split from the rest of Moldova after 3551 all, and consequently that zone has been removed (again) and reinstated 3552 in the "backward" file as a link to Europe/Chisinau. And third, the 3553 end date for Fiji's summer time this summer was moved forward from the 3554 earlier planned Feb 26, to Jan 22. 3555 3556 Apart from that, Moldova (MD) returns to a single entry in zone.tab 3557 (and the incorrect syntax that was in the 2011m version of that file 3558 is so fixed - it would have been fixed in a different way had this 3559 change not happened - that's the "missing" sccs version id). 3560 3561 3562 Release data2011m - 2011-10-24 21:42:16 +0700 3563 3564 In particular, the typos in comments in the data (2011-11-17 should have 3565 been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that 3566 Tim Parenti noted) have been fixed, and the change for Ukraine has been 3567 made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to 3568 Tim Parenti, and also Denys Gavrysh) 3569 3570 In addition, I added Europe/Tiraspol to zone.tab. 3571 3572 This time, all the files have new version numbers... (including the files 3573 otherwise unchanged in 2011m that were changed in 2011l but didn't get new 3574 version numbers there...) 3575 3576 3577 Release data2011l - 2011-10-10 11:15:43 +0700 3578 3579 There are just 2 changes that cause different generated tzdata files from 3580 zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil 3581 is included, but commented out. Compared with the diff I sent out last week, 3582 this version also includes attributions for the sources for the changes 3583 (in much the same format as ado used, but the html tags have not been 3584 checked, verified, or used in any way at all, so if there are errors there, 3585 please let me know.) 3586 3587 3588 Release data2011k - 2011-09-20 17:54:03 -0400 3589 3590 [not summarized] 3591 3592 3593 Release data2011j - 2011-09-12 09:22:49 -0400 3594 3595 (contemporary changes for Samoa; past changes for Kenya, Uganda, and 3596 Tanzania); there are also two spelling corrections to comments in 3597 the australasia file (with thanks to Christos Zoulas). 3598 3599 3600 Release 2011i - 2011-08-29 05:56:32 -0400 3601 3602 [not summarized] 3603 3604 3605 Release data2011h - 2011-06-15 18:41:48 -0400 3606 3607 Russia and Curaao changes 3608 3609 3610 Release 2011g - 2011-04-25 09:07:22 -0400 3611 3612 update the rules for Egypt to reflect its abandonment of DST this year 3613 3614 3615 Release 2011f - 2011-04-06 17:14:53 -0400 3616 3617 [not summarized] 3618 3619 3620 Release 2011e - 2011-03-31 16:04:38 -0400 3621 3622 Morocco, Chile, and tz-link changes 3623 3624 3625 Release 2011d - 2011-03-14 09:18:01 -0400 3626 3627 changes that impact present-day timestamps in Cuba, Samoa, and Turkey 3628 3629 3630 Release 2011c - 2011-03-07 09:30:09 -0500 3631 3632 These do affect current timestamps in Chile and Annette Island, Canada. 3633 3634 3635 Release 2011b - 2011-02-07 08:44:50 -0500 3636 3637 [not summarized] 3638 3639 3640 Release 2011a - 2011-01-24 10:30:16 -0500 3641 3642 [not summarized] 3643 3644 3645 Release data2010o - 2010-11-01 09:18:23 -0400 3646 3647 change to the end of DST in Fiji in 2011 3648 3649 3650 Release 2010n - 2010-10-25 08:19:17 -0400 3651 3652 [not summarized] 3653 3654 3655 Release 2010m - 2010-09-27 09:24:48 -0400 3656 3657 Hong Kong, Vostok, and zic.c changes 3658 3659 3660 Release 2010l - 2010-08-16 06:57:25 -0400 3661 3662 [not summarized] 3663 3664 3665 Release 2010k - 2010-07-26 10:42:27 -0400 3666 3667 [not summarized] 3668 3669 3670 Release 2010j - 2010-05-10 09:07:48 -0400 3671 3672 changes for Baha de Banderas and for version naming 3673 3674 3675 Release data2010i - 2010-04-16 18:50:45 -0400 3676 3677 the end of DST in Morocco on 2010-08-08 3678 3679 3680 Release data2010h - 2010-04-05 09:58:56 -0400 3681 3682 [not summarized] 3683 3684 3685 Release data2010g - 2010-03-24 11:14:53 -0400 3686 3687 [not summarized] 3688 3689 3690 Release 2010f - 2010-03-22 09:45:46 -0400 3691 3692 [not summarized] 3693 3694 3695 Release data2010e - 2010-03-08 14:24:27 -0500 3696 3697 corrects the Dhaka bug found by Danvin Ruangchan 3698 3699 3700 Release data2010d - 2010-03-06 07:26:01 -0500 3701 3702 [not summarized] 3703 3704 3705 Release 2010c - 2010-03-01 09:20:58 -0500 3706 3707 changes including KRE's suggestion for earlier initialization of 3708 "goahead" and "goback" structure elements 3709 3710 3711 Release code2010a - 2010-02-16 10:40:04 -0500 3712 3713 [not summarized] 3714 3715 3716 Release data2010b - 2010-01-20 12:37:01 -0500 3717 3718 Mexico changes 3719 3720 3721 Release data2010a - 2010-01-18 08:30:04 -0500 3722 3723 changes to Dhaka 3724 3725 3726 Release data2009u - 2009-12-26 08:32:28 -0500 3727 3728 changes to DST in Bangladesh 3729 3730 3731 Release 2009t - 2009-12-21 13:24:27 -0500 3732 3733 [not summarized] 3734 3735 3736 Release data2009s - 2009-11-14 10:26:32 -0500 3737 3738 (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change 3739 3740 3741 Release 2009r - 2009-11-09 10:10:31 -0500 3742 3743 "antarctica" and "tz-link.htm" changes 3744 3745 3746 Release 2009q - 2009-11-02 09:12:40 -0500 3747 3748 with two corrections as reported by Eric Muller and Philip Newton 3749 3750 3751 Release data2009p - 2009-10-23 15:05:27 -0400 3752 3753 Argentina (including San Luis) changes (with the correction from 3754 Mariano Absatz) 3755 3756 3757 Release data2009o - 2009-10-14 16:49:38 -0400 3758 3759 Samoa (commentary only), Pakistan, and Bangladesh changes 3760 3761 3762 Release data2009n - 2009-09-22 15:13:38 -0400 3763 3764 added commentary for Argentina and a change to the end of DST in 3765 2009 in Pakistan 3766 3767 3768 Release data2009m - 2009-09-03 10:23:43 -0400 3769 3770 Samoa and Palestine changes 3771 3772 3773 Release data2009l - 2009-08-14 09:13:07 -0400 3774 3775 Samoa (comments only) and Egypt 3776 3777 3778 Release 2009k - 2009-07-20 09:46:08 -0400 3779 3780 [not summarized] 3781 3782 3783 Release data2009j - 2009-06-15 06:43:59 -0400 3784 3785 Bangladesh change (with a short turnaround since the DST change is 3786 impending) 3787 3788 3789 Release 2009i - 2009-06-08 09:21:22 -0400 3790 3791 updating for DST in Bangladesh this year 3792 3793 3794 Release 2009h - 2009-05-26 09:19:14 -0400 3795 3796 [not summarized] 3797 3798 3799 Release data2009g - 2009-04-20 16:34:07 -0400 3800 3801 Cairo 3802 3803 3804 Release data2009f - 2009-04-10 11:00:52 -0400 3805 3806 correct DST in Pakistan 3807 3808 3809 Release 2009e - 2009-04-06 09:08:11 -0400 3810 3811 [not summarized] 3812 3813 3814 Release 2009d - 2009-03-23 09:38:12 -0400 3815 3816 Morocco, Tunisia, Argentina, and American Astronomical Society changes 3817 3818 3819 Release data2009c - 2009-03-16 09:47:51 -0400 3820 3821 change to the start of Cuban DST 3822 3823 3824 Release 2009b - 2009-02-09 11:15:22 -0500 3825 3826 [not summarized] 3827 3828 3829 Release 2009a - 2009-01-21 10:09:39 -0500 3830 3831 [not summarized] 3832 3833 3834 Release data2008i - 2008-10-21 12:10:25 -0400 3835 3836 southamerica and zone.tab files, with Argentina DST rule changes and 3837 United States zone reordering and recommenting 3838 3839 3840 Release 2008h - 2008-10-13 07:33:56 -0400 3841 3842 [not summarized] 3843 3844 3845 Release 2008g - 2008-10-06 09:03:18 -0400 3846 3847 Fix a broken HTML anchor and update Brazil's DST transitions; 3848 there's also a slight reordering of information in tz-art.htm. 3849 3850 3851 Release data2008f - 2008-09-09 22:33:26 -0400 3852 3853 [not summarized] 3854 3855 3856 Release 2008e - 2008-07-28 14:11:17 -0400 3857 3858 changes by Arthur David Olson and Jesper Nrgaard Welen 3859 3860 3861 Release data2008d - 2008-07-07 09:51:38 -0400 3862 3863 changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo 3864 3865 3866 Release data2008c - 2008-05-19 17:48:03 -0400 3867 3868 Pakistan, Morocco, and Mongolia 3869 3870 3871 Release data2008b - 2008-03-24 08:30:59 -0400 3872 3873 including renaming Asia/Calcutta to Asia/Kolkata, with a backward 3874 link provided 3875 3876 3877 Release 2008a - 2008-03-08 05:42:16 -0500 3878 3879 [not summarized] 3880 3881 3882 Release 2007k - 2007-12-31 10:25:22 -0500 3883 3884 most importantly, changes to the "southamerica" file based on 3885 Argentina's readoption of daylight saving time 3886 3887 3888 Release 2007j - 2007-12-03 09:51:01 -0500 3889 3890 1. eliminate the "P" (parameter) macro; 3891 3892 2. the "noncontroversial" changes circulated on the time zone 3893 mailing list (less the changes to "logwtmp.c"); 3894 3895 3. eliminate "too many transition" errors when "min" is used in time 3896 zone rules; 3897 3898 4. changes by Paul Eggert (including updated information for Venezuela). 3899 3900 3901 Release data2007i - 2007-10-30 10:28:11 -0400 3902 3903 changes for Cuba and Syria 3904 3905 3906 Release 2007h - 2007-10-01 10:05:51 -0400 3907 3908 changes by Paul Eggert, as well as an updated link to the ICU 3909 project in tz-link.htm 3910 3911 3912 Release 2007g - 2007-08-20 10:47:59 -0400 3913 3914 changes by Paul Eggert 3915 3916 The "leapseconds" file has been updated to incorporate the most 3917 recent International Earth Rotation and Reference Systems Service 3918 (IERS) bulletin. 3919 3920 There's an addition to tz-art.htm regarding the television show "Medium". 3921 3922 3923 Release 2007f - 2007-05-07 10:46:46 -0400 3924 3925 changes by Paul Eggert (including Haiti, Turks and Caicos, and New 3926 Zealand) 3927 3928 changes to zic.c to allow hour values greater than 24 (along with 3929 Paul's improved time value overflow checking) 3930 3931 3932 Release 2007e - 2007-04-02 10:11:52 -0400 3933 3934 Syria and Honduras changes by Paul Eggert 3935 3936 zic.c variable renaming changes by Arthur David Olson 3937 3938 3939 Release 2007d - 2007-03-20 08:48:30 -0400 3940 3941 changes by Paul Eggert 3942 3943 the elimination of white space at the ends of lines 3944 3945 3946 Release 2007c - 2007-02-26 09:09:37 -0500 3947 3948 changes by Paul Eggert 3949 3950 3951 Release 2007b - 2007-02-12 09:34:20 -0500 3952 3953 Paul Eggert's proposed change to the quotation handling logic in zic.c. 3954 3955 changes to the commentary in "leapseconds" reflecting the IERS 3956 announcement that there is to be no positive leap second at the end 3957 of June 2007. 3958 3959 3960 Release 2007a - 2007-01-08 12:28:29 -0500 3961 3962 changes by Paul Eggert 3963 3964 Derick Rethan's Asmara change 3965 3966 Oscar van Vlijmen's Easter Island local mean time change 3967 3968 symbolic link changes 3969 3970 3971 Release 2006p - 2006-11-27 08:54:27 -0500 3972 3973 changes by Paul Eggert 3974 3975 3976 Release 2006o - 2006-11-06 09:18:07 -0500 3977 3978 changes by Paul Eggert 3979 3980 3981 Release 2006n - 2006-10-10 11:32:06 -0400 3982 3983 changes by Paul Eggert 3984 3985 3986 Release 2006m - 2006-10-02 15:32:35 -0400 3987 3988 changes for Uruguay, Palestine, and Egypt by Paul Eggert 3989 3990 (minimalist) changes to zic.8 to clarify "until" information 3991 3992 3993 Release data2006l - 2006-09-18 12:58:11 -0400 3994 3995 Paul's best-effort work on this coming weekend's Egypt time change 3996 3997 3998 Release 2006k - 2006-08-28 12:19:09 -0400 3999 4000 changes by Paul Eggert 4001 4002 4003 Release 2006j - 2006-08-21 09:56:32 -0400 4004 4005 changes by Paul Eggert 4006 4007 4008 Release code2006i - 2006-08-07 12:30:55 -0400 4009 4010 localtime.c fixes 4011 4012 Ken Pizzini's conversion script 4013 4014 4015 Release code2006h - 2006-07-24 09:19:37 -0400 4016 4017 adds public domain notices to four files 4018 4019 includes a fix for transition times being off by a second 4020 4021 adds a new recording to the "arts" file (information courtesy Colin Bowern) 4022 4023 4024 Release 2006g - 2006-05-08 17:18:09 -0400 4025 4026 northamerica changes by Paul Eggert 4027 4028 4029 Release 2006f - 2006-05-01 11:46:00 -0400 4030 4031 a missing version number problem is fixed (with thanks to Bradley 4032 White for catching the problem) 4033 4034 4035 Release 2006d - 2006-04-17 14:33:43 -0400 4036 4037 changes by Paul Eggert 4038 4039 added new items to tz-arts.htm that were found by Paul 4040 4041 4042 Release 2006c - 2006-04-03 10:09:32 -0400 4043 4044 two sets of data changes by Paul Eggert 4045 4046 a fencepost error fix in zic.c 4047 4048 changes to zic.c and the "europe" file to minimize differences 4049 between output produced by the old 32-bit zic and the new 64-bit 4050 version 4051 4052 4053 Release 2006b - 2006-02-20 10:08:18 -0500 4054 [tz32code2006b + tz64code2006b + tzdata2006b] 4055 4056 64-bit code 4057 4058 All SCCS IDs were bumped to "8.1" for this release. 4059 4060 4061 Release 2006a - 2006-01-30 08:59:31 -0500 4062 4063 changes by Paul Eggert (in particular, Indiana time zone moves) 4064 4065 an addition to the zic manual page to describe how special-case 4066 transitions are handled 4067 4068 4069 Release 2005r - 2005-12-27 09:27:13 -0500 4070 4071 Canadian changes by Paul Eggert 4072 4073 They also add "<pre>" directives to time zone data files and reflect 4074 changes to warning message logic in "zdump.c" (but with calls to 4075 "gettext" kept unbundled at the suggestion of Ken Pizzini). 4076 4077 4078 Release 2005q - 2005-12-13 09:17:09 -0500 4079 4080 Nothing earth-shaking here: 4081 1. Electronic mail addresses have been removed. 4082 2. Casts of the return value of exit have been removed. 4083 3. Casts of the argument of is.* macros have been added. 4084 4. Indentation in one section of zic.c has been fixed. 4085 5. References to dead URLs in the data files have been dealt with. 4086 4087 4088 Release 2005p - 2005-12-05 10:30:53 -0500 4089 4090 "systemv", "tz-link.htm", and "zdump.c" changes 4091 (less the casts of arguments to the is* macros) 4092 4093 4094 Release 2005o - 2005-11-28 10:55:26 -0500 4095 4096 Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert 4097 4098 zdump.c lint fixes by Arthur David Olson 4099 4100 4101 Release 2005n - 2005-10-03 09:44:09 -0400 4102 4103 changes by Paul Eggert (both the Uruguay changes and the Kyrgyzstan 4104 et al. changes) 4105 4106 4107 Release 2005m - 2005-08-29 12:15:40 -0400 4108 4109 changes by Paul Eggert (with a small tweak to the tz-art change) 4110 4111 a declaration of an unused variable has been removed from zdump.c 4112 4113 4114 Release 2005l - 2005-08-22 12:06:39 -0400 4115 4116 changes by Paul Eggert 4117 4118 overflow/underflow checks by Arthur David Olson, minus changes to 4119 the "Theory" file about the pending addition of 64-bit data (I grow 4120 less confident of the changes being accepted with each passing day, 4121 and the changes no longer increase the data files nine-fold--there's 4122 less than a doubling in size by my local Sun's reckoning) 4123 4124 4125 Release 2005k - 2005-07-14 14:14:24 -0400 4126 4127 The "leapseconds" file has been edited to reflect the recently 4128 announced leap second at the end of 2005. 4129 4130 I've also deleted electronic mail addresses from the files as an 4131 anti-spam measure. 4132 4133 4134 Release 2005j - 2005-06-13 14:34:13 -0400 4135 4136 These reflect changes to limit the length of time zone abbreviations 4137 and the characters used in those abbreviations. 4138 4139 There are also changes to handle POSIX-style "quoted" timezone 4140 environment variables. 4141 4142 The changes were circulated on the time zone mailing list; the only 4143 change since then was the removal of a couple of minimum-length of 4144 abbreviation checks. 4145 4146 4147 Release data2005i - 2005-04-21 15:04:16 -0400 4148 4149 changes (most importantly to Nicaragua and Haiti) by Paul Eggert 4150 4151 4152 Release 2005h - 2005-04-04 11:24:47 -0400 4153 4154 changes by Paul Eggert 4155 4156 minor changes to Makefile and zdump.c to produce more useful output 4157 when doing a "make typecheck" 4158 4159 4160 Release 2005g - 2005-03-14 10:11:21 -0500 4161 4162 changes by Paul Eggert (a change to current DST rules in Uruguay and 4163 an update to a link to time zone software) 4164 4165 4166 Release 2005f - 2005-03-01 08:45:32 -0500 4167 4168 data and documentation changes by Paul Eggert 4169 4170 4171 Release 2005e - 2005-02-10 15:59:44 -0500 4172 4173 [not summarized] 4174 4175 4176 Release code2005d - 2005-01-31 09:21:47 -0500 4177 4178 make zic complain about links to links if the -v flag is used 4179 4180 have "make public" do more code checking 4181 4182 add an include to "localtime.c" for the benefit of gcc systems 4183 4184 4185 Release 2005c - 2005-01-17 18:36:29 -0500 4186 4187 get better results when mktime runs on a system where time_t is double 4188 4189 changes to the data files (most importantly to Paraguay) 4190 4191 4192 Release 2005b - 2005-01-10 09:19:54 -0500 4193 4194 Get localtime and gmtime working on systems with exotic time_t types. 4195 4196 Update the leap second commentary in the "leapseconds" file. 4197 4198 4199 Release 2005a - 2005-01-01 13:13:44 -0500 4200 4201 [not summarized] 4202 4203 4204 Release code2004i - 2004-12-14 13:42:58 -0500 4205 4206 Deal with systems where time_t is unsigned. 4207 4208 4209 Release code2004h - 2004-12-07 11:40:18 -0500 4210 4211 64-bit-time_t changes 4212 4213 4214 Release 2004g - 2004-11-02 09:06:01 -0500 4215 4216 update to Cuba (taking effect this weekend) 4217 4218 other changes by Paul Eggert 4219 4220 correction of the spelling of Oslo 4221 4222 changed versions of difftime.c and private.h 4223 4224 4225 Release code2004f - 2004-10-21 10:25:22 -0400 4226 4227 Cope with wide-ranging tm_year values. 4228 4229 4230 Release 2004e - 2004-10-11 14:47:21 -0400 4231 4232 Brazil/Argentina/Israel changes by Paul Eggert 4233 4234 changes to tz-link.htm by Paul 4235 4236 one small fix to Makefile 4237 4238 4239 Release 2004d - 2004-09-22 08:27:29 -0400 4240 4241 Avoid overflow problems when TM_YEAR_BASE is added to an integer. 4242 4243 4244 Release 2004c - 2004-08-11 12:06:26 -0400 4245 4246 asctime-related changes 4247 4248 (variants of) some of the documentation changes suggested by Paul Eggert 4249 4250 4251 Release 2004b - 2004-07-19 14:33:35 -0400 4252 4253 data changes by Paul Eggert - most importantly, updates for Argentina 4254 4255 4256 Release 2004a - 2004-05-27 12:00:47 -0400 4257 4258 changes by Paul Eggert 4259 4260 Handle DST transitions that occur at the end of a month in some 4261 years but at the start of the following month in other years. 4262 4263 Add a copy of the correspondence that's the basis for claims about 4264 DST in the Navajo Nation. 4265 4266 4267 Release 2003e - 2003-12-15 09:36:47 -0500 4268 4269 changes by Arthur David Olson (primarily code changes) 4270 4271 changes by Paul Eggert (primarily data changes) 4272 4273 minor changes to "Makefile" and "northamerica" (in the latter case, 4274 optimization of the "Toronto" rules) 4275 4276 4277 Release 2003d - 2003-10-06 09:34:44 -0400 4278 4279 changes by Paul Eggert 4280 4281 4282 Release 2003c - 2003-09-16 10:47:05 -0400 4283 4284 Fix bad returns in zic.c's inleap function. 4285 Thanks to Bradley White for catching the problem! 4286 4287 4288 Release 2003b - 2003-09-16 07:13:44 -0400 4289 4290 Add a "--version" option (and documentation) to the zic and zdump commands. 4291 4292 changes to overflow/underflow checking in zic 4293 4294 a localtime typo fix. 4295 4296 Update the leapseconds and tz-art.htm files. 4297 4298 4299 Release 2003a - 2003-03-24 09:30:54 -0500 4300 4301 changes by Paul Eggert 4302 4303 a few additions and modifications to the tz-art.htm file 4304 4305 4306 Release 2002d - 2002-10-15 13:12:42 -0400 4307 4308 changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab 4309 4310 There's also a new time zone quote in "tz-art.htm". 4311 4312 4313 Release 2002c - 2002-04-04 11:55:20 -0500 4314 4315 changes by Paul Eggert 4316 4317 Change zic.c to avoid creating symlinks to files that don't exist. 4318 4319 4320 Release 2002b - 2002-01-28 12:56:03 -0500 4321 4322 [These change notes are for Release 2002a, which was corrupted. 4323 2002b was a corrected version of 2002a.] 4324 4325 changes by Paul Eggert 4326 4327 Update the "leapseconds" file to note that there'll be no leap 4328 second at the end of June, 2002. 4329 4330 Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone. 4331 4332 Change to "difftime.c" to avoid sizeof problems. 4333 4334 4335 Release 2001d - 2001-10-09 13:31:32 -0400 4336 4337 changes by Paul Eggert 4338 4339 4340 Release 2001c - 2001-06-05 13:59:55 -0400 4341 4342 changes by Paul Eggert and Andrew Brown 4343 4344 4345 Release 2001b - 2001-04-05 16:44:38 -0400 4346 4347 changes by Paul Eggert (modulo jnorgard's typo fix) 4348 4349 tz-art.htm has been HTMLified. 4350 4351 4352 Release 2001a - 2001-03-13 12:57:44 -0500 4353 4354 changes by Paul Eggert 4355 4356 An addition to the "leapseconds" file: comments with the text of the 4357 latest IERS leap second notice. 4358 4359 Trailing white space has been removed from data file lines, and 4360 repeated spaces in "Rule Jordan" lines in the "asia" file have been 4361 converted to tabs. 4362 4363 4364 Release 2000h - 2000-12-14 15:33:38 -0500 4365 4366 changes by Paul Eggert 4367 4368 one typo fix in the "art" file 4369 4370 With providence, this is the last update of the millennium. 4371 4372 4373 Release 2000g - 2000-10-10 11:35:22 -0400 4374 4375 changes by Paul Eggert 4376 4377 correction of John Mackin's name submitted by Robert Elz 4378 4379 Garry Shandling's Daylight Saving Time joke (!?!) from the recent 4380 Emmy Awards broadcast. 4381 4382 4383 Release 2000f - 2000-08-10 09:31:58 -0400 4384 4385 changes by Paul Eggert 4386 4387 Added information in "tz-art.htm" on a Seinfeld reference to DST. 4388 4389 Error checking and messages in the "yearistype" script have been 4390 improved. 4391 4392 4393 Release 2000e - 2000-07-31 09:27:54 -0400 4394 4395 data changes by Paul Eggert 4396 4397 a change to the default value of the defined constant HAVE_STRERROR 4398 4399 the addition of a Dave Barry quote on DST to the tz-arts file 4400 4401 4402 Release 2000d - 2000-04-20 15:43:04 -0400 4403 4404 changes to the documentation and code of strftime for C99 conformance 4405 4406 a bug fix for date.c 4407 4408 These are based on (though modified from) changes by Paul Eggert. 4409 4410 4411 Release 2000c - 2000-03-04 10:31:43 -0500 4412 4413 changes by Paul Eggert 4414 4415 4416 Release 2000b - 2000-02-21 12:16:29 -0500 4417 4418 changes by Paul Eggert and Joseph Myers 4419 4420 modest tweaks to the tz-art.htm and tz-link.htm files 4421 4422 4423 Release 2000a - 2000-01-18 09:21:26 -0500 4424 4425 changes by Paul Eggert 4426 4427 The two hypertext documents have also been renamed. 4428 4429 4430 Release code1999i-data1999j - 1999-11-15 18:43:22 -0500 4431 4432 Paul Eggert's changes 4433 4434 additions to the "zic" manual page and the "Arts.htm" file 4435 4436 4437 Release code1999h-data1999i - 1999-11-08 14:55:21 -0500 4438 4439 [not summarized] 4440 4441 4442 Release data1999h - 1999-10-07 03:50:29 -0400 4443 4444 changes by Paul Eggert to "europe" (most importantly, fixing 4445 Lithuania and Estonia) 4446 4447 4448 Release 1999g - 1999-09-28 11:06:18 -0400 4449 4450 data changes by Paul Eggert (most importantly, the change for 4451 Lebanon that buys correctness for this coming Sunday) 4452 4453 The "code" file contains changes to "Makefile" and "checktab.awk" to 4454 allow better checking of time zone files before they are published. 4455 4456 4457 Release 1999f - 1999-09-23 09:48:14 -0400 4458 4459 changes by Arthur David Olson and Paul Eggert 4460 4461 4462 Release 1999e - 1999-08-17 15:20:54 -0400 4463 4464 changes circulated by Paul Eggert, although the change to handling 4465 of DST-specifying timezone names has been commented out for now 4466 (search for "XXX" in "localtime.c" for details). These files also 4467 do not make any changes to the start of DST in Brazil. 4468 4469 In addition to Paul's changes, there are updates to "Arts.htm" and 4470 cleanups of URLs. 4471 4472 4473 Release 1999d - 1999-03-30 11:31:07 -0500 4474 4475 changes by Paul Eggert 4476 4477 The Makefile's "make public" rule has also been changed to do a test 4478 compile of each individual time zone data file (which should help 4479 avoid problems such as the one we had with Nicosia). 4480 4481 4482 Release 1999c - 1999-03-25 09:47:47 -0500 4483 4484 changes by Paul Eggert, most importantly the change for Chile. 4485 4486 4487 Release 1999b - 1999-02-01 17:51:44 -0500 4488 4489 changes by Paul Eggert 4490 4491 code changes (suggested by Mani Varadarajan, mani at be.com) for 4492 correct handling of symbolic links when building using a relative directory 4493 4494 code changes to generate correct messages for failed links 4495 4496 updates to the URLs in Arts.htm 4497 4498 4499 Release 1999a - 1999-01-19 16:20:29 -0500 4500 4501 error message internationalizations and corrections in zic.c and 4502 zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz, 4503 to whom thanks!) 4504 4505 4506 Release code1998h-data1998i - 1998-10-01 09:56:10 -0400 4507 4508 changes for Brazil, Chile, and Germany 4509 4510 support for use of "24:00" in the input files for the time zone compiler 4511 4512 4513 Release code1998g-data1998h - 1998-09-24 10:50:28 -0400 4514 4515 changes by Paul Eggert 4516 4517 correction to a define in the "private.h" file 4518 4519 4520 Release data1998g - 1998-08-11 03:28:35 -0000 4521 [tzdata1998g.tar.gz is missing!] 4522 4523 Lithuanian change provided by mgedmin at pub.osf.it 4524 4525 Move creation of the GMT link with Etc/GMT to "etcetera" (from 4526 "backward") to ensure that the GMT file is created even where folks 4527 don't want the "backward" links (as suggested by Paul Eggert). 4528 4529 4530 Release data1998f - 1998-07-20 13:50:00 -0000 4531 [tzdata1998f.tar.gz is missing!] 4532 4533 Update the "leapseconds" file to include the newly-announced 4534 insertion at the end of 1998. 4535 4536 4537 Release code1998f - 1998-06-01 10:18:31 -0400 4538 4539 addition to localtime.c by Guy Harris 4540 4541 4542 Release 1998e - 1998-05-28 09:56:26 -0400 4543 4544 The Makefile is changed to produce zoneinfo-posix rather than 4545 zoneinfo/posix, and to produce zoneinfo-leaps rather than 4546 zoneinfo/right. 4547 4548 data changes by Paul Eggert 4549 4550 changes from Guy Harris to provide asctime_r and ctime_r 4551 4552 A usno1998 file (substantially identical to usno1997) has been added. 4553 4554 4555 Release 1998d - 1998-05-14 11:58:34 -0400 4556 4557 changes to comments (in particular, elimination of references to CIA maps). 4558 "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places 4559 where changes occur. 4560 4561 4562 Release 1998c - 1998-02-28 12:32:26 -0500 4563 4564 changes by Paul Eggert (save the "French correction," on which I'll 4565 wait for the dust to settle) 4566 4567 symlink changes 4568 4569 changes and additions to Arts.htm 4570 4571 4572 Release 1998b - 1998-01-17 14:31:51 -0500 4573 4574 URL cleanups and additions 4575 4576 4577 Release 1998a - 1998-01-13 12:37:35 -0500 4578 4579 changes by Paul Eggert 4580 4581 4582 Release code1997i-data1997k - 1997-12-29 09:53:41 -0500 4583 4584 changes by Paul Eggert, with minor modifications from Arthur David 4585 Olson to make the files more browser friendly 4586 4587 4588 Release code1997h-data1997j - 1997-12-18 17:47:35 -0500 4589 4590 minor changes to put "TZif" at the start of each timezone information file 4591 4592 a rule has also been added to the Makefile so you can 4593 make zones 4594 to just recompile the zone information files (rather than doing a 4595 full "make install" with its other effects). 4596 4597 4598 Release data1997i - 1997-10-07 08:45:38 -0400 4599 4600 changes to Africa by Paul Eggert 4601 4602 4603 Release code1997g-data1997h - 1997-09-04 16:56:54 -0400 4604 4605 corrections for Uruguay (and other locations) 4606 4607 Arthur David Olson's simple-minded fix allowing mktime to both 4608 correctly handle leap seconds and correctly handle tm_sec values 4609 upon which arithmetic has been performed. 4610 4611 4612 Release code1997f-data1997g - 1997-07-19 13:15:02 -0400 4613 4614 Paul Eggert's updates 4615 4616 a small change to a function prototype; 4617 4618 "Music" has been renamed "Arts.htm", HTMLified, and augmented to 4619 include information on Around the World in Eighty Days. 4620 4621 4622 Release code1997e-data1997f - 1997-05-03 18:52:34 -0400 4623 4624 fixes to zic's error handling 4625 4626 changes inspired by the item circulated on Slovenia 4627 4628 The description of Web resources has been HTMLified for browsing 4629 convenience. 4630 4631 A new piece of tz-related music has been added to the "Music" file. 4632 4633 4634 Release code1997d-data1997e - 1997-03-29 12:48:52 -0500 4635 4636 Paul Eggert's latest suggestions 4637 4638 4639 Release code1997c-data1997d - 1997-03-07 20:37:54 -0500 4640 4641 changes to "zic.c" to correct performance of the "-s" option 4642 4643 a new file "usno1997" 4644 4645 4646 Release data1997c - 1997-03-04 09:58:18 -0500 4647 4648 changes in Israel 4649 4650 4651 Release 1997b - 1997-02-27 18:34:19 -0500 4652 4653 The data file incorporates the 1997 leap second. 4654 4655 The code file incorporates Arthur David Olson's take on the 4656 zic/multiprocessor/directory-creation situation. 4657 4658 4659 Release 1997a - 1997-01-21 09:11:10 -0500 4660 4661 Paul Eggert's Antarctica (and other changes) 4662 4663 Arthur David Olson finessed the "getopt" issue by checking against 4664 both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1 4665 is returned while SunOS 5.5's manual says EOF is returned). 4666 4667 4668 Release code1996o-data1996n - 1996-12-27 21:42:05 -0500 4669 4670 Paul Eggert's latest changes 4671 4672 4673 Release code1996n - 1996-12-16 09:42:02 -0500 4674 4675 link snapping fix from Bruce Evans (via Garrett Wollman) 4676 4677 4678 Release data1996m - 1996-11-24 02:37:34 -0000 4679 [tzdata1996m.tar.gz is missing!] 4680 4681 Paul Eggert's batch of changes 4682 4683 4684 Release code1996m-data1996l - 1996-11-05 14:00:12 -0500 4685 4686 No functional changes here; the files have simply been changed to 4687 make more use of ISO style dates in comments. The names of the above 4688 files now include the year in full. 4689 4690 4691 Release code96l - 1996-09-08 17:12:20 -0400 4692 4693 tzcode96k was missing a couple of pieces. 4694 4695 4696 Release 96k - 1996-09-08 16:06:22 -0400 4697 4698 the latest round of changes from Paul Eggert 4699 4700 the recent Year 2000 material 4701 4702 4703 Release code96j - 1996-07-30 13:18:53 -0400 4704 4705 Set sp->typecnt as suggested by Timothy Patrick Murphy. 4706 4707 4708 Release code96i - 1996-07-27 20:11:35 -0400 4709 4710 Paul's suggested patch for strftime %V week numbers 4711 4712 4713 Release data96i - 1996-07-01 18:13:04 -0400 4714 4715 "northamerica" and "europe" changes by Paul Eggert 4716 4717 4718 Release code96h - 1996-06-05 08:02:21 -0400 4719 4720 fix for handling transitions specified in Universal Time 4721 4722 Some "public domain" notices have also been added. 4723 4724 4725 Release code96g - 1996-05-16 14:00:26 -0400 4726 4727 fix for the simultaneous-DST-and-zone-change challenge 4728 4729 4730 Release data96h - 1996-05-09 17:40:51 -0400 4731 4732 changes by Paul Eggert 4733 4734 4735 Release code96f-data96g - 1996-05-03 03:09:59 -0000 4736 [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!] 4737 4738 The changes get us some of the way to fixing the problems noted in Paul 4739 Eggert's letter yesterday (in addition to a few others). The approach 4740 has been to make zic a bit smarter about figuring out what time zone 4741 abbreviations apply just after the time specified in the "UNTIL" part 4742 of a zone line. Putting the smarts in zic means avoiding having 4743 transition times show up in both "Zone" lines and "Rule" lines, which 4744 in turn avoids multiple transition time entries in time zone files. 4745 (This also makes the zic input files such as "europe" a bit shorter and 4746 should ease maintenance.) 4747 4748 4749 Release data96f - 1996-04-19 19:20:03 -0000 4750 [tzdata96f.tar.gz is missing!] 4751 4752 The only changes are to the "northamerica" file; the time zone 4753 abbreviation for Denver is corrected to MST (and MDT), and the 4754 comments for Mexico have been updated. 4755 4756 4757 Release data96e - 1996-03-19 17:37:26 -0500 4758 4759 Proposals by Paul Eggert, in particular the Portugal change that 4760 comes into play at the end of this month. 4761 4762 4763 Release data96d - 1996-03-18 20:49:39 -0500 4764 4765 [not summarized] 4766 4767 4768 Release code96e - 1996-02-29 15:43:27 -0000 4769 [tzcode96e.tar.gz is missing!] 4770 4771 internationalization changes and the fix to the documentation for strftime 4772 4773 4774 Release code96d-data96c - 1996-02-12 11:05:27 -0500 4775 4776 The "code" file simply updates Bob Kridle's electronic address. 4777 4778 The "data" file updates rules for Mexico. 4779 4780 4781 Release data96b - 1996-01-27 15:44:42 -0500 4782 4783 Kiribati change 4784 4785 4786 Release code96c - 1996-01-16 16:58:15 -0500 4787 4788 leap-year streamlining and binary-search changes 4789 4790 fix to newctime.3 4791 4792 4793 Release code96b - 1996-01-10 20:42:39 -0500 4794 4795 fixes and enhancements from Paul Eggert, including code that 4796 emulates the behavior of recent versions of the SunOS "date" 4797 command. 4798 4799 4800 Release 96a - 1996-01-06 09:08:24 -0500 4801 4802 Israel updates 4803 4804 fixes to strftime.c for correct ISO 8601 week number generation, 4805 plus support for two new formats ('G' and 'g') to give ISO 8601 year 4806 numbers (which are not necessarily the same as calendar year numbers) 4807 4808 4809 Release code95i-data95m - 1995-12-21 12:46:47 -0500 4810 4811 The latest revisions from Paul Eggert are included, the usno1995 4812 file has been updated, and a new file ("WWW") covering useful URLs 4813 has been added. 4814 4815 4816 Release code95h-data95l - 1995-12-19 18:10:12 -0500 4817 4818 A simplification of a macro definition, a change to data for Sudan, 4819 and (for last minute shoppers) notes in the "Music" file on the CD 4820 "Old Man Time". 4821 4822 4823 Release code95g-data95k - 1995-10-30 10:32:47 -0500 4824 4825 (slightly reformatted) 8-bit-clean proposed patch 4826 4827 minor patch: US/Eastern -> America/New_York 4828 4829 snapshot of the USNO's latest data ("usno1995") 4830 4831 some other minor cleanups 4832 4833 4834 Release code95f-data95j - 1995-10-28 21:01:34 -0000 4835 [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!] 4836 4837 European cleanups 4838 4839 support for 64-bit time_t's 4840 4841 optimization in localtime.c 4842 4843 4844 Release code95e - 1995-10-13 13:23:57 -0400 4845 4846 the mktime change to scan from future to past when trying to find time zone 4847 offsets 4848 4849 4850 Release data95i - 1995-09-26 10:43:26 -0400 4851 4852 For Canada/Central, guess that the Sun customer's "one week too 4853 early" was just a approximation, and the true error is one month 4854 too early. This is consistent with the rest of Canada. 4855 4856 4857 Release data95h - 1995-09-21 11:26:48 -0400 4858 4859 latest changes from Paul Eggert 4860 4861 4862 Release code95d - 1995-09-14 11:14:45 -0400 4863 4864 the addition of a "Music" file, which documents four recorded 4865 versions of the tune "Save That Time". 4866 4867 4868 Release data95g - 1995-09-01 17:21:36 -0400 4869 4870 "yearistype" correction 4871 4872 4873 Release data95f - 1995-08-28 20:46:56 -0400 4874 4875 Paul Eggert's change to the australasia file 4876 4877 4878 Release data95e - 1995-07-08 18:02:34 -0400 4879 4880 The only change is a leap second at the end of this year. 4881 Thanks to Bradley White for forwarding news on the leap second. 4882 4883 4884 Release data95d - 1995-07-03 13:26:22 -0400 4885 4886 Paul Eggert's changes 4887 4888 4889 Release data95c - 1995-07-02 19:19:28 -0400 4890 4891 changes to "asia", "backward", "europe", and "southamerica" 4892 (read: northamericacentrics need not apply) 4893 4894 4895 Release code95c - 1995-03-13 14:00:46 -0500 4896 4897 one-line fix for sign extension problems in detzcode 4898 4899 4900 Release 95b - 1995-03-04 11:22:38 -0500 4901 4902 Minor changes in both: 4903 4904 The "code" file contains a workaround for the lack of "unistd.h" in 4905 Microsoft C++ version 7. 4906 4907 The "data" file contains a fixed "Link" for America/Shiprock. 4908 4909 4910 Release 94h - 1994-12-10 12:51:14 -0500 4911 4912 The files: 4913 4914 * incorporate the changes to "zdump" and "date" to make changes to 4915 the "TZ" environment variable permanent; 4916 4917 * incorporate the table changes by Paul Eggert; 4918 4919 * include (and document) support for universal time specifications in 4920 data files - but do not (yet) include use of this feature in the 4921 data files. 4922 4923 Think of this as "TZ Classic" - the software has been set up not to break if 4924 universal time shows up in its input, and data entries have been 4925 left as is so as not to break existing implementations. 4926 4927 4928 Release data94f - 1994-08-20 12:56:09 -0400 4929 4930 (with thanks!) the latest data updates from Paul Eggert 4931 4932 4933 Release data94e - 1994-06-04 13:13:53 -0400 4934 4935 [not summarized] 4936 4937 4938 Release code94g - 1994-05-05 12:14:07 -0400 4939 4940 fix missing "optind.c" and a reference to it in the Makefile 4941 4942 4943 Release code94f - 1994-05-05 13:00:33 -0000 4944 [tzcode94f.tar.gz is missing!] 4945 4946 changes to avoid overflow in difftime, as well as changes to cope 4947 with the 52/53 challenge in strftime 4948 4949 4950 Release code94e - 1994-03-30 23:32:59 -0500 4951 4952 change for the benefit of PCTS 4953 4954 4955 Release 94d - 1994-02-24 15:42:25 -0500 4956 4957 Avoid clashes with POSIX semantics for zones such as GMT+4. 4958 4959 Some other very minor housekeeping is also present. 4960 4961 4962 Release code94c - 1994-02-10 08:52:40 -0500 4963 4964 Fix bug where mkdirs was broken unless you compile with 4965 -fwritable-strings (which is generally losing to do). 4966 4967 4968 Release 94b - 1994-02-07 10:04:33 -0500 4969 4970 work by Paul Eggert who notes: 4971 4972 I found another book of time zone histories by E W Whitman; it's not 4973 as extensive as Shanks but has a few goodies of its own. I used it 4974 to update the tables. I also fixed some more as a result of 4975 correspondence with Adam David and Peter Ilieve, and move some stray 4976 links from 'europe' to 'backward'. I corrected some scanning errors 4977 in usno1989. 4978 4979 As far as the code goes, I fixed zic to allow years in the range 4980 INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900. 4981 And I cleaned up the zic documentation a little bit. 4982 4983 4984 Release data94a - 1994-02-03 08:58:54 -0500 4985 4986 It simply incorporates the recently announced leap second into the 4987 "leapseconds" file. 4988 4989 4990 Release 93g - 1993-11-22 17:28:27 -0500 4991 4992 Paul Eggert has provided a good deal of historic information (based 4993 on Shanks), and there are some code changes to deal with the buglets 4994 that crawled out in dealing with the new information. 4995 4996 4997 Release 93f - 1993-10-15 12:27:46 -0400 4998 4999 Paul Eggert's changes 5000 5001 5002 Release 93e - 1993-09-05 21:21:44 -0400 5003 5004 This has updated data for Israel, England, and Kwajalein. There's 5005 also an update to "zdump" to cope with Kwajalein's 24-hour jump. 5006 Thanks to Paul Eggert and Peter Ilieve for the changes. 5007 5008 5009 Release 93d - 1993-06-17 23:34:17 -0400 5010 5011 new fix and new data on Israel 5012 5013 5014 Release 93c - 1993-06-06 19:31:55 -0400 5015 5016 [not summarized] 5017 5018 5019 Release 93b - 1993-02-02 14:53:58 -0500 5020 5021 updated "leapseconds" file 5022 5023 5024 Release 93 - 1993-01-08 07:01:06 -0500 5025 5026 At kre's suggestion, the package has been split in two - a code piece 5027 (which also includes documentation) that's only of use to folks who 5028 want to recompile things and a data piece useful to anyone who can 5029 run "zic". 5030 5031 The new version has a few changes to the data files, a few 5032 portability changes, and an off-by-one fix (with thanks to 5033 Tom Karzes at deshaw.com for providing a description and a 5034 solution). 5035 5036 5037 Release 92c - 1992-11-21 17:35:36 -0000 5038 [tz92c.tar.Z is missing!] 5039 5040 The fallout from the latest round of DST transitions. 5041 5042 There are changes for Portugal, Saskatchewan, and "Pacific-New"; 5043 there's also a change to "zic.c" that makes it portable to more systems. 5044 5045 5046 Release 92 - 1992-04-25 18:17:03 -0000 5047 [tz92.tar.Z is missing!] 5048 5049 By popular demand (well, at any rate, following a request by kre at munnari) 5050 5051 5052 The 1989 update of the time zone package featured: 5053 5054 * POSIXization (including interpretation of POSIX-style TZ environment 5055 variables, provided by Guy Harris), 5056 * ANSIfication (including versions of "mktime" and "difftime"), 5057 * SVIDulation (an "altzone" variable) 5058 * MACHination (the "gtime" function) 5059 * corrections to some time zone data (including corrections to the rules 5060 for Great Britain and New Zealand) 5061 * reference data from the United States Naval Observatory for folks who 5062 want to do additional time zones 5063 * and the 1989 data for Saudi Arabia. 5064 5065 (Since this code will be treated as "part of the implementation" in some 5066 places and as "part of the application" in others, there's no good way to 5067 name functions, such as timegm, that are not part of the proposed ANSI C 5068 standard; such functions have kept their old, underscore-free names in this 5069 update.) 5070 5071 And the "dysize" function has disappeared; it was present to allow 5072 compilation of the "date" command on old BSD systems, and a version of "date" 5073 is now provided in the package. The "date" command is not created when you 5074 "make all" since it may lack options provided by the version distributed with 5075 your operating system, or may not interact with the system in the same way 5076 the native version does. 5077 5078 Since POSIX frowns on correct leap second handling, the default behavior of 5079 the "zic" command (in the absence of a "-L" option) has been changed to omit 5080 leap second information from its output files. 5081 5082 5083 ----- 5084 Notes 5085 5086 This file contains copies of the part of each release announcement 5087 that talks about the changes in that release. The text has been 5088 adapted and reformatted for the purposes of this file. 5089 5090 Traditionally a release R consists of a pair of tarball files, 5091 tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g., 5092 code2010a, data2012c) consist of just one or the other tarball, and a 5093 few (e.g., code2012c-data2012d) have tarballs with mixed version 5094 numbers. Recent releases also come in an experimental format 5095 consisting of a single tarball tzdb-R.tar.lz with extra data. 5096 5097 Release timestamps are taken from the release's commit (for newer, 5098 Git-based releases), from the newest file in the tarball (for older 5099 releases, where this info is available) or from the email announcing 5100 the release (if all else fails; these are marked with a time zone 5101 abbreviation of -0000 and an "is missing!" comment). 5102 5103 Earlier versions of the code and data were not announced on the tz 5104 list and are not summarized here. 5105 5106 This file is in the public domain. 5107 5108 Local Variables: 5109 coding: utf-8 5110 End: 5111
Indexes created Tue Sep 30 17:09:57 GMT 2025