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