NEWS revision 1.31
1 News for the tz database 2 3 Release 2020b - 2020-10-06 18:35:04 -0700 4 5 Briefly: 6 Revised predictions for Morocco's changes starting in 2023. 7 Canada's Yukon changes to -07 on 2020-11-01, not 2020-03-08. 8 Macquarie Island has stayed in sync with Tasmania since 2011. 9 Casey, Antarctica is at +08 in winter and +11 in summer. 10 zic no longer supports -y, nor the TYPE field of Rules. 11 12 Changes to future timestamps 13 14 Morocco's spring-forward after Ramadan is now predicted to occur 15 no sooner than two days after Ramadan, instead of one day. 16 (Thanks to Milamber.) The first altered prediction is for 2023, 17 now predicted to spring-forward on April 30 instead of April 23. 18 19 Changes to past and future timestamps 20 21 Casey Station, Antarctica has been using +08 in winter and +11 in 22 summer since 2018. The most recent transition from +08 to +11 was 23 2020-10-04 00:01. Also, Macquarie Island has been staying in 24 sync with Tasmania since 2011. (Thanks to Steffen Thorsen.) 25 26 Changes to past and future time zone abbreviations and DST flags 27 28 Canada's Yukon, represented by America/Whitehorse and 29 America/Dawson, changes its time zone rules from -08/-07 to 30 permanent -07 on 2020-11-01, not on 2020-03-08 as 2020a had it. 31 This change affects only the time zone abbreviation (MST vs PDT) 32 and daylight saving flag for the period between the two dates. 33 (Thanks to Andrew G. Smith.) 34 35 Changes to past timestamps 36 37 Correct several transitions for Hungary for 1918/1983. 38 For example, the 1983-09-25 fall-back was at 01:00, not 03:00. 39 (Thanks to Gza Nyry.) Also, the 1890 transition to standard 40 time was on 11-01, not 10-01 (thanks to Michael Deckers). 41 42 The 1891 French transition was on March 16, not March 15. The 43 1911-03-11 French transition was at midnight, not a minute later. 44 Monaco's transitions were on 1892-06-01 and 1911-03-29, not 45 1891-03-15 and 1911-03-11. (Thanks to Michael Deckers.) 46 47 Changes to code 48 49 Support for zic's long-obsolete '-y YEARISTYPE' option has been 50 removed and, with it, so has support for the TYPE field in Rule 51 lines, which is now reserved for compatibility with earlier zic. 52 These features were previously deprecated in release 2015f. 53 (Thanks to Tim Parenti.) 54 55 zic now defaults to '-b slim' instead of to '-b fat'. 56 57 zic's new '-l -' and '-p -' options uninstall any existing 58 localtime and posixrules files, respectively. 59 60 The undocumented and ineffective tzsetwall function has been 61 removed. 62 63 Changes to build procedure 64 65 The Makefile now defaults POSIXRULES to '-', so the posixrules 66 feature (obsolete as of 2019b) is no longer installed by default. 67 68 Changes to documentation and commentary 69 70 The long-obsolete files pacificnew, systemv, and yearistype.sh have 71 been removed from the distribution. (Thanks to Tim Parenti.) 72 73 74 Release 2020a - 2020-04-23 16:03:47 -0700 75 76 Briefly: 77 Morocco springs forward on 2020-05-31, not 2020-05-24. 78 Canada's Yukon advanced to -07 year-round on 2020-03-08. 79 America/Nuuk renamed from America/Godthab. 80 zic now supports expiration dates for leap second lists. 81 82 Changes to future timestamps 83 84 Morocco's second spring-forward transition in 2020 will be May 31, 85 not May 24 as predicted earlier. (Thanks to Semlali Naoufal.) 86 Adjust future-year predictions to use the first Sunday after the 87 day after Ramadan, not the first Sunday after Ramadan. 88 89 Canada's Yukon, represented by America/Whitehorse and 90 America/Dawson, advanced to -07 year-round, beginning with its 91 spring-forward transition on 2020-03-08, and will not fall back on 92 2020-11-01. Although a government press release calls this 93 "permanent Pacific Daylight Saving Time", we prefer MST for 94 consistency with nearby Dawson Creek, Creston, and Fort Nelson. 95 (Thanks to Tim Parenti.) 96 97 Changes to past timestamps 98 99 Shanghai observed DST in 1919. (Thanks to Phake Nick.) 100 101 Changes to timezone identifiers 102 103 To reflect current usage in English better, America/Godthab has 104 been renamed to America/Nuuk. A backwards-compatibility link 105 remains for the old name. 106 107 Changes to code 108 109 localtime.c no longer mishandles timestamps after the last 110 transition in a TZif file with leap seconds and with daylight 111 saving time transitions projected into the indefinite future. 112 For example, with TZ='America/Los_Angeles' with leap seconds, 113 zdump formerly reported a DST transition on 2038-03-14 114 from 01:59:32.999... to 02:59:33 instead of the correct transition 115 from 01:59:59.999... to 03:00:00. 116 117 zic -L now supports an Expires line in the leapseconds file, and 118 truncates the TZif output accordingly. This propagates leap 119 second expiration information into the TZif file, and avoids the 120 abovementioned localtime.c bug as well as similar bugs present in 121 many client implementations. If no Expires line is present, zic 122 -L instead truncates the TZif output based on the #expires comment 123 present in leapseconds files distributed by tzdb 2018f and later; 124 however, this usage is obsolescent. For now, the distributed 125 leapseconds file has an Expires line that is commented out, so 126 that the file can be fed to older versions of zic which ignore the 127 commented-out line. Future tzdb distributions are planned to 128 contain a leapseconds file with an Expires line. 129 130 The configuration macros HAVE_TZNAME and USG_COMPAT should now be 131 set to 1 if the system library supports the feature, and 2 if not. 132 As before, these macros are nonzero if tzcode should support the 133 feature, zero otherwise. 134 135 The configuration macro ALTZONE now has the same values with the 136 same meaning as HAVE_TZNAME and USG_COMPAT. 137 138 The code's defense against CRLF in leap-seconds.list is now 139 portable to POSIX awk. (Problem reported by Deborah Goldsmith.) 140 141 Although the undocumented tzsetwall function is not changed in 142 this release, it is now deprecated in preparation for removal in 143 future releases. Due to POSIX requirements, tzsetwall has not 144 worked for some time. Any code that uses it should instead use 145 tzalloc(NULL) or, if portability trumps thread-safety, should 146 unset the TZ environment variable. 147 148 Changes to commentary 149 150 The les-de-la-Madeleine and the Listuguj reserve are noted as 151 following America/Halifax, and comments about Yukon's "south" and 152 "north" have been corrected to say "east" and "west". (Thanks to 153 Jeffery Nichols.) 154 155 156 Release 2019c - 2019-09-11 08:59:48 -0700 157 158 Briefly: 159 Fiji observes DST from 2019-11-10 to 2020-01-12. 160 Norfolk Island starts observing Australian-style DST. 161 162 Changes to future timestamps 163 164 Fiji's next DST transitions will be 2019-11-10 and 2020-01-12 165 instead of 2019-11-03 and 2020-01-19. (Thanks to Raymond Kumar.) 166 Adjust future guesses accordingly. 167 168 Norfolk Island will observe Australian-style DST starting in 169 spring 2019. The first transition is on 2019-10-06. (Thanks to 170 Kyle Czech and Michael Deckers.) 171 172 Changes to past timestamps 173 174 Many corrections to time in Turkey from 1940 through 1985. 175 (Thanks to Oya Vula via Alois Treindl, and to Kvan Yazan.) 176 177 The Norfolk Island 1975-03-02 transition was at 02:00 standard 178 time, not 02:00 DST. (Thanks to Michael Deckers.) 179 180 South Korea observed DST from 1948 through 1951. Although this 181 info was supposed to appear in release 2014j, a typo inadvertently 182 suppressed the change. (Thanks to Alois Treindl.) 183 184 Detroit observed DST in 1967 and 1968 following the US DST rules, 185 except that its 1967 DST began on June 14 at 00:01. (Thanks to 186 Alois Treindl for pointing out that the old data entries were 187 probably wrong.) 188 189 Fix several errors in pre-1970 transitions in Perry County, IN. 190 (Thanks to Alois Triendl for pointing out the 1967/9 errors.) 191 192 Edmonton did not observe DST in 1967 or 1969. In 1946 Vancouver 193 ended DST on 09-29 not 10-13, and Vienna ended DST on 10-07 not 194 10-06. In 1945 Knigsberg (now Kaliningrad) switched from +01/+02 195 to +02/+03 on 04-10 not 01-01, and its +02/+03 is abbreviated 196 EET/EEST, not CET/CEST. (Thanks to Alois Triendl.) In 1946 197 Knigsberg switched to +03 on 04-07 not 01-01. 198 199 In 1946 Louisville switched from CST to CDT on 04-28 at 00:01, not 200 01-01 at 00:00. (Thanks to Alois Treindl and Michael Deckers.) 201 Also, it switched from CST to CDT on 1950-04-30, not 1947-04-27. 202 203 The 1892-05-01 transition in Brussels was at 00:17:30, not at noon. 204 (Thanks to Michael Deckers.) 205 206 Changes to past time zone abbreviations and DST flags 207 208 Hong Kong Winter Time, observed from 1941-10-01 to 1941-12-25, 209 is now flagged as DST and is abbreviated HKWT not HKT. 210 211 Changes to code 212 213 leapseconds.awk now relies only on its input data, rather than 214 also relying on its comments. (Inspired by code from Dennis 215 Ferguson and Chris Woodbury.) 216 217 The code now defends against CRLFs in leap-seconds.list. 218 (Thanks to Brian Inglis and Chris Woodbury.) 219 220 Changes to documentation and commentary 221 222 theory.html discusses leap seconds. (Thanks to Steve Summit.) 223 224 Nashville's newspapers dueled about the time of day in the 1950s. 225 (Thanks to John Seigenthaler.) 226 227 Liechtenstein observed Swiss DST in 1941/2. 228 (Thanks to Alois Treindl.) 229 230 231 Release 2019b - 2019-07-01 00:09:53 -0700 232 233 Briefly: 234 Brazil no longer observes DST. 235 'zic -b slim' outputs smaller TZif files; please try it out. 236 Palestine's 2019 spring-forward transition was on 03-29, not 03-30. 237 238 Changes to future timestamps 239 240 Brazil has canceled DST and will stay on standard time indefinitely. 241 (Thanks to Steffen Thorsen, Marcus Diniz, and Daniel Soares de 242 Oliveira.) 243 244 Predictions for Morocco now go through 2087 instead of 2037, to 245 work around a problem on newlib when using TZif files output by 246 zic 2019a or earlier. (Problem reported by David Gauchard.) 247 248 Changes to past and future timestamps 249 250 Palestine's 2019 spring transition was 03-29 at 00:00, not 03-30 251 at 01:00. (Thanks to Sharef Mustafa and Even Scharning.) Guess 252 future transitions to be March's last Friday at 00:00. 253 254 Changes to past timestamps 255 256 Hong Kong's 1941-06-15 spring-forward transition was at 03:00, not 257 03:30. Its 1945 transition from JST to HKT was on 11-18 at 02:00, 258 not 09-15 at 00:00. In 1946 its spring-forward transition was on 259 04-21 at 00:00, not the previous day at 03:30. From 1946 through 260 1952 its fall-back transitions occurred at 04:30, not at 03:30. 261 In 1947 its fall-back transition was on 11-30, not 12-30. 262 (Thanks to P Chan.) 263 264 Changes to past time zone abbreviations 265 266 Italy's 1866 transition to Rome Mean Time was on December 12, not 267 September 22. This affects only the time zone abbreviation for 268 Europe/Rome between those dates. (Thanks to Stephen Trainor and 269 Luigi Rosa.) 270 271 Changes affecting metadata only 272 273 Add info about the Crimea situation in zone1970.tab and zone.tab. 274 (Problem reported by Serhii Demediuk.) 275 276 Changes to code 277 278 zic's new -b option supports a way to control data bloat and to 279 test for year-2038 bugs in software that reads TZif files. 280 'zic -b fat' and 'zic -b slim' generate larger and smaller output; 281 for example, changing from fat to slim shrinks the Europe/London 282 file from 3648 to 1599 bytes, saving about 56%. Fat and slim 283 files represent the same set of timestamps and use the same TZif 284 format as documented in tzfile(5) and in Internet RFC 8536. 285 Fat format attempts to work around bugs or incompatibilities in 286 older software, notably software that mishandles 64-bit TZif data 287 or uses obsolete TZ strings like "EET-2EEST" that lack DST rules. 288 Slim format is more efficient and does not work around 64-bit bugs 289 or obsolete TZ strings. Currently zic defaults to fat format 290 unless you compile with -DZIC_BLOAT_DEFAULT=\"slim\"; this 291 out-of-the-box default is intended to change in future releases 292 as the buggy software often mishandles timestamps anyway. 293 294 zic no longer treats a set of rules ending in 2037 specially. 295 Previously, zic assumed that such a ruleset meant that future 296 timestamps could not be predicted, and therefore omitted a 297 POSIX-like TZ string in the TZif output. The old behavior is no 298 longer needed for current tzdata, and caused problems with newlib 299 when used with older tzdata (reported by David Gauchard). 300 301 zic no longer generates some artifact transitions. For example, 302 Europe/London no longer has a no-op transition in January 1996. 303 304 Changes to build procedure 305 306 tzdata.zi now assumes zic 2017c or later. This shrinks tzdata.zi 307 by a percent or so. 308 309 Changes to documentation and commentary 310 311 The Makefile now documents the POSIXRULES macro as being obsolete, 312 and similarly, zic's -p POSIXRULES option is now documented as 313 being obsolete. Although the POSIXRULES feature still exists and 314 works as before, in practice it is rarely used for its intended 315 purpose, and it does not work either in the default reference 316 implementation (for timestamps after 2037) or in common 317 implementations such as GNU/Linux (for contemporary timestamps). 318 Since POSIXRULES was designed primarily as a temporary transition 319 facility for System V platforms that died off decades ago, it is 320 being decommissioned rather than institutionalized. 321 322 New info on Bonin Islands and Marcus (thanks to Wakaba and Phake Nick). 323 324 325 Release 2019a - 2019-03-25 22:01:33 -0700 326 327 Briefly: 328 Palestine "springs forward" on 2019-03-30 instead of 2019-03-23. 329 Metlakatla "fell back" to rejoin Alaska Time on 2019-01-20 at 02:00. 330 331 Changes to past and future timestamps 332 333 Palestine will not start DST until 2019-03-30, instead of 2019-03-23 as 334 previously predicted. Adjust our prediction by guessing that spring 335 transitions will be between 24 and 30 March, which matches recent practice 336 since 2016. (Thanks to Even Scharning and Tim Parenti.) 337 338 Metlakatla ended its observance of Pacific standard time, 339 rejoining Alaska Time, on 2019-01-20 at 02:00. (Thanks to Ryan 340 Stanley and Tim Parenti.) 341 342 Changes to past timestamps 343 344 Israel observed DST in 1980 (08-02/09-13) and 1984 (05-05/08-25). 345 (Thanks to Alois Treindl and Isaac Starkman.) 346 347 Changes to time zone abbreviations 348 349 Etc/UCT is now a backward-compatibility link to Etc/UTC, instead 350 of being a separate zone that generates the abbreviation "UCT", 351 which nowadays is typically a typo. (Problem reported by Isiah 352 Meadows.) 353 354 Changes to code 355 356 zic now has an -r option to limit the time range of output data. 357 For example, 'zic -r @1000000000' limits the output data to 358 timestamps starting 1000000000 seconds after the Epoch. 359 This helps shrink output size and can be useful for applications 360 not needing the full timestamp history, such as TZDIST truncation; 361 see Internet RFC 8536 section 5.1. (Inspired by a feature request 362 from Christopher Wong, helped along by bug reports from Wong and 363 from Tim Parenti.) 364 365 Changes to documentation 366 367 Mention Internet RFC 8536 (February 2019), which documents TZif. 368 369 tz-link.html now cites tzdata-meta 370 <https://tzdata-meta.timtimeonline.com/>. 371 372 373 Release 2018i - 2018-12-30 11:05:43 -0800 374 375 Briefly: 376 So Tom and Prncipe switches from +01 to +00 on 2019-01-01. 377 378 Changes to future timestamps 379 380 Due to a change in government, So Tom and Prncipe switches back 381 from +01 to +00 on 2019-01-01 at 02:00. (Thanks to Vadim 382 Nasardinov and Michael Deckers.) 383 384 385 Release 2018h - 2018-12-23 17:59:32 -0800 386 387 Briefly: 388 Qyzylorda, Kazakhstan moved from +06 to +05 on 2018-12-21. 389 New zone Asia/Qostanay because Qostanay, Kazakhstan didn't move. 390 Metlakatla, Alaska observes PST this winter only. 391 Guess Morocco will continue to adjust clocks around Ramadan. 392 Add predictions for Iran from 2038 through 2090. 393 394 Changes to future timestamps 395 396 Guess that Morocco will continue to fall back just before and 397 spring forward just after Ramadan, the practice since 2012. 398 (Thanks to Maamar Abdelkader.) This means Morocco will observe 399 negative DST during Ramadan in main and vanguard formats, and in 400 rearguard format it stays in the +00 timezone and observes 401 ordinary DST in all months other than Ramadan. As before, extend 402 this guesswork to the year 2037. As a consequence, Morocco is 403 scheduled to observe three DST transitions in some Gregorian years 404 (e.g., 2033) due to the mismatch between the Gregorian and Islamic 405 calendars. 406 407 The table of exact transitions for Iranian DST has been extended. 408 It formerly cut off before the year 2038 in a nod to 32-bit time_t. 409 It now cuts off before 2091 as there is doubt about how the Persian 410 calendar will treat 2091. This change predicts DST transitions in 411 2038-9, 2042-3, and 2046-7 to occur one day later than previously 412 predicted. As before, post-cutoff transitions are approximated. 413 414 Changes to past and future timestamps 415 416 Qyzylorda (aka Kyzylorda) oblast in Kazakhstan moved from +06 to 417 +05 on 2018-12-21. This is a zone split as Qostanay (aka 418 Kostanay) did not switch, so create a zone Asia/Qostanay. 419 420 Metlakatla moved from Alaska to Pacific standard time on 2018-11-04. 421 It did not change clocks that day and remains on -08 this winter. 422 (Thanks to Ryan Stanley.) It will revert to the usual Alaska 423 rules next spring, so this change affects only timestamps 424 from 2018-11-04 through 2019-03-10. 425 426 Change to past timestamps 427 428 Kwajalein's 1993-08-20 transition from -12 to +12 was at 24:00, 429 not 00:00. I transcribed the time incorrectly from Shanks. 430 (Thanks to Phake Nick.) 431 432 Nauru's 1979 transition was on 02-10 at 02:00, not 05-01 at 00:00. 433 (Thanks to Phake Nick.) 434 435 Guam observed DST irregularly from 1959 through 1977. 436 (Thanks to Phake Nick.) 437 438 Hong Kong observed DST in 1941 starting 06-15 (not 04-01), then on 439 10-01 changed standard time to +08:30 (not +08). Its transition 440 back to +08 after WWII was on 1945-09-15, not the previous day. 441 Its 1904-10-30 change took effect at 01:00 +08 (not 00:00 LMT). 442 (Thanks to Phake Nick, Steve Allen, and Joseph Myers.) Also, 443 its 1952 fallback was on 11-02 (not 10-25). 444 445 This release contains many changes to timestamps before 1946 due 446 to Japanese possession or occupation of Pacific/Chuuk, 447 Pacific/Guam, Pacific/Kosrae, Pacific/Kwajalein, Pacific/Majuro, 448 Pacific/Nauru, Pacific/Palau, and Pacific/Pohnpei. 449 (Thanks to Phake Nick.) 450 451 Assume that the Spanish East Indies was like the Philippines and 452 observed American time until the end of 1844. This affects 453 Pacific/Chuuk, Pacific/Kosrae, Pacific/Palau, and Pacific/Pohnpei. 454 455 Changes to past tm_isdst flags 456 457 For the recent Morocco change, the tm_isdst flag should be 1 from 458 2018-10-27 00:00 to 2018-10-28 03:00. (Thanks to Michael Deckers.) 459 Give a URL to the official decree. (Thanks to Matt Johnson.) 460 461 462 Release 2018g - 2018-10-26 22:22:45 -0700 463 464 Briefly: 465 Morocco switches to permanent +01 on 2018-10-28. 466 467 Changes to future timestamps 468 469 Morocco switches from +00/+01 to permanent +01 effective 2018-10-28, 470 so its clocks will not fall back as previously scheduled. 471 (Thanks to Mohamed Essedik Najd and Brian Inglis.) 472 473 Changes to code 474 475 When generating TZif files with leap seconds, zic no longer uses a 476 format that trips up older 32-bit clients, fixing a bug introduced 477 in 2018f. (Reported by Daniel Fischer.) Also, the zic workaround 478 for QTBUG-53071 now also works for TZif files with leap seconds. 479 480 The translator to rearguard format now rewrites the line 481 "Rule Japan 1948 1951 - Sep Sat>=8 25:00 0 S" to 482 "Rule Japan 1948 1951 - Sep Sun>=9 1:00 0 S". 483 This caters to zic before 2007 and to Oracle TZUpdater 2.2.0 484 and earlier. (Reported by Christos Zoulas.) 485 486 Changes to past time zone abbreviations 487 488 Change HDT to HWT/HPT for WWII-era abbreviations in Hawaii. 489 This reverts to 2011h, as the abbreviation change in 2011i was 490 likely inadvertent. 491 492 Changes to documentation 493 494 tzfile.5 has new sections on interoperability issues. 495 496 497 Release 2018f - 2018-10-18 00:14:18 -0700 498 499 Briefly: 500 Volgograd moves from +03 to +04 on 2018-10-28. 501 Fiji ends DST 2019-01-13, not 2019-01-20. 502 Most of Chile changes DST dates, effective 2019-04-06. 503 504 Changes to future timestamps 505 506 Volgograd moves from +03 to +04 on 2018-10-28 at 02:00. 507 (Thanks to Alexander Fetisov and Stepan Golosunov.) 508 509 Fiji ends DST 2019-01-13 instead of the 2019-01-20 previously 510 predicted. (Thanks to Raymond Kumar.) Adjust future predictions 511 accordingly. 512 513 Most of Chile will end DST on the first Saturday in April at 24:00 mainland 514 time, and resume DST on the first Saturday in September at 24:00 mainland 515 time. The changes are effective from 2019-04-06, and do not affect the 516 Magallanes region modeled by America/Punta_Arenas. (Thanks to Juan Correa 517 and Tim Parenti.) Adjust future predictions accordingly. 518 519 Changes to past timestamps 520 521 The 2018-05-05 North Korea 30-minute time zone change took place 522 at 23:30 the previous day, not at 00:00 that day. 523 524 China's 1988 spring-forward transition was on April 17, not 525 April 10. Its DST transitions in 1986/91 were at 02:00, not 00:00. 526 (Thanks to P Chan.) 527 528 Fix several issues for Macau before 1992. Macau's pre-1904 LMT 529 was off by 10 s. Macau switched to +08 in 1904 not 1912, and 530 temporarily switched to +09/+10 during World War II. Macau 531 observed DST in 1942/79, not 1961/80, and there were several 532 errors for transition times and dates. (Thanks to P Chan.) 533 534 The 1948-1951 fallback transitions in Japan were at 25:00 on 535 September's second Saturday, not at 24:00. (Thanks to Phake Nick.) 536 zic turns this into 01:00 on the day after September's second 537 Saturday, which is the best that POSIX or C platforms can do. 538 539 Incorporate 1940-1949 Asia/Shanghai DST transitions from a 2014 540 paper by Li Yu, replacing more-questionable data from Shanks. 541 542 Changes to time zone abbreviations 543 544 Use "PST" and "PDT" for Philippine time. (Thanks to Paul Goyette.) 545 546 Changes to code 547 548 zic now always generates TZif files where time type 0 is used for 549 timestamps before the first transition. This simplifies the 550 reading of TZif files and should not affect behavior of existing 551 TZif readers because the same set of time types is used; only 552 their internal indexes may have changed. This affects only the 553 legacy zones EST5EDT, CST6CDT, MST7MDT, PST8PDT, CET, MET, and 554 EET, which previously used nonzero types for these timestamps. 555 556 Because of the type 0 change, zic no longer outputs a dummy 557 transition at time -2**59 (before the Big Bang), as clients should 558 no longer need this to handle historical timestamps correctly. 559 This reverts a change introduced in 2013d and shrinks most TZif 560 files by a few bytes. 561 562 zic now supports negative time-of-day in Rule and Leap lines, e.g., 563 "Rule X min max - Apr lastSun -6:00 1:00 -" means the transition 564 occurs at 18:00 on the Saturday before the last Sunday in April. 565 This behavior was documented in 2018a but the code did not 566 entirely match the documentation. 567 568 localtime.c no longer requires at least one time type in TZif 569 files that lack transitions or have a POSIX-style TZ string. This 570 future-proofs the code against possible future extensions to the 571 format that would allow TZif files with POSIX-style TZ strings and 572 without transitions or time types. 573 574 A read-access subscript error in localtime.c has been fixed. 575 It could occur only in TZif files with timecnt == 0, something that 576 does not happen in practice now but could happen in future versions. 577 578 localtime.c no longer ignores TZif POSIX-style TZ strings that 579 specify only standard time. Instead, these TZ strings now 580 override the default time type for timestamps after the last 581 transition (or for all timestamps if there are no transitions), 582 just as DST strings specifying DST have always done. 583 584 leapseconds.awk now outputs "#updated" and "#expires" comments, 585 and supports leap seconds at the ends of months other than June 586 and December. (Inspired by suggestions from Chris Woodbury.) 587 588 Changes to documentation 589 590 New restrictions: A Rule name must start with a character that 591 is neither an ASCII digit nor "-" nor "+", and an unquoted name 592 should not use characters in the set "!$%&'()*,/:;<=>?@[\]^`{|}~". 593 The latter restriction makes room for future extensions (a 594 possibility noted by Tom Lane). 595 596 tzfile.5 now documents what time types apply before the first and 597 after the last transition, if any. 598 599 Documentation now uses the spelling "timezone" for a TZ setting 600 that determines timestamp history, and "time zone" for a 601 geographic region currently sharing the same standard time. 602 603 The name "TZif" is now used for the tz binary data format. 604 605 tz-link.htm now mentions the A0 TimeZone Migration utilities. 606 (Thanks to Aldrin Martoq for the link.) 607 608 Changes to build procedure 609 610 New 'make' target 'rearguard_tarballs' to build the rearguard 611 tarball only. This is a convenience on platforms that lack lzip 612 if you want to build the rearguard tarball. (Problem reported by 613 Deborah Goldsmith.) 614 615 tzdata.zi is now more stable from release to release. (Problem 616 noted by Tom Lane.) It is also a bit shorter. 617 618 tzdata.zi now can contain comment lines documenting configuration 619 information, such as which data format was selected, which input 620 files were used, and how leap seconds are treated. (Problems 621 noted by Lester Caine and Brian Inglis.) If the Makefile defaults 622 are used these comment lines are absent, for backward 623 compatibility. A redistributor intending to alter its copy of the 624 files should also append "-LABEL" to the 'version' file's first 625 line, where "LABEL" identifies the redistributor's change. 626 627 628 Release 2018e - 2018-05-01 23:42:51 -0700 629 630 Briefly: 631 632 North Korea switches back to +09 on 2018-05-05. 633 The main format uses negative DST again, for Ireland etc. 634 'make tarballs' now also builds a rearguard tarball. 635 New 's' and 'd' suffixes in SAVE columns of Rule and Zone lines. 636 637 Changes to past and future timestamps 638 639 North Korea switches back from +0830 to +09 on 2018-05-05. 640 (Thanks to Kang Seonghoon, Arthur David Olson, Seo Sanghyeon, 641 and Tim Parenti.) 642 643 Bring back the negative-DST changes of 2018a, except be more 644 compatible with data parsers that do not support negative DST. 645 Also, this now affects historical timestamps in Namibia and the 646 former Czechoslovakia, not just Ireland. The main format now uses 647 negative DST to model timestamps in Europe/Dublin (from 1971 on), 648 Europe/Prague (1946/7), and Africa/Windhoek (1994/2017). This 649 does not affect UT offsets, only time zone abbreviations and the 650 tm_isdst flag. Also, this does not affect rearguard or vanguard 651 formats; effectively the main format now uses vanguard instead of 652 rearguard format. Data parsers that do not support negative DST 653 can still use data from the rearguard tarball described below. 654 655 Changes to build procedure 656 657 The command 'make tarballs' now also builds the tarball 658 tzdataVERSION-rearguard.tar.gz, which is like tzdataVERSION.tar.gz 659 except that it uses rearguard format intended for trailing-edge 660 data parsers. 661 662 Changes to data format and to code 663 664 The SAVE column of Rule and Zone lines can now have an 's' or 'd' 665 suffix, which specifies whether the adjusted time is standard time 666 or daylight saving time. If no suffix is given, daylight saving 667 time is used if and only if the SAVE column is nonzero; this is 668 the longstanding behavior. Although this new feature is not used 669 in tzdata, it could be used to specify the legal time in Namibia 670 1994-2017, as opposed to the popular time (see below). 671 672 Changes to past timestamps 673 674 From 1994 through 2017 Namibia observed DST in winter, not summer. 675 That is, it used negative DST, as Ireland still does. This change 676 does not affect UTC offsets; it affects only the tm_isdst flag and 677 the abbreviation used during summer, which is now CAT, not WAST. 678 Although (as noted by Michael Deckers) summer and winter time were 679 both simply called "standard time" in Namibian law, in common 680 practice winter time was considered to be DST (as noted by Stephen 681 Colebourne). The full effect of this change is only in vanguard 682 and main format; in rearguard format, the tm_isdst flag is still 683 zero in winter and nonzero in summer. 684 685 In 1946/7 Czechoslovakia also observed negative DST in winter. 686 The full effect of this change is only in vanguard and main 687 formats; in rearguard format, it is modeled as plain GMT without 688 daylight saving. Also, the dates of some 1944/5 DST transitions 689 in Czechoslovakia have been changed. 690 691 692 Release 2018d - 2018-03-22 07:05:46 -0700 693 694 Briefly: 695 696 Palestine starts DST a week earlier in 2018. 697 Add support for vanguard and rearguard data consumers. 698 Add subsecond precision to source data format, though not to data. 699 700 Changes to future timestamps 701 702 In 2018, Palestine starts DST on March 24, not March 31. 703 Adjust future predictions accordingly. (Thanks to Sharef Mustafa.) 704 705 Changes to past and future timestamps 706 707 Casey Station in Antarctica changed from +11 to +08 on 2018-03-11 708 at 04:00. (Thanks to Steffen Thorsen.) 709 710 Changes to past timestamps 711 712 Historical transitions for Uruguay, represented by 713 America/Montevideo, have been updated per official legal documents, 714 replacing previous data mainly originating from the inventions of 715 Shanks & Pottenger. This has resulted in adjustments ranging from 716 30 to 90 minutes in either direction over at least two dozen 717 distinct periods ranging from one day to several years in length. 718 A mere handful of pre-1991 transitions are unaffected; data since 719 then has come from more reliable contemporaneous reporting. These 720 changes affect various timestamps in 1920-1923, 1936, 1939, 721 1942-1943, 1959, 1966-1970, 1972, 1974-1980, and 1988-1990. 722 Additionally, Uruguay's pre-standard-time UT offset has been 723 adjusted westward by 7 seconds, from UT-03:44:44 to UT-03:44:51, to 724 match the location of the Observatory of the National Meteorological 725 Institute in Montevideo. 726 (Thanks to Jeremie Bonjour, Tim Parenti, and Michael Deckers.) 727 728 Enderbury and Kiritimati skipped New Year's Eve 1994, not 729 New Year's Day 1995. (Thanks to Kerry Shetline.) 730 731 Fix the 1912-01-01 transition for Portugal and its colonies. 732 This transition was at 00:00 according to the new UT offset, not 733 according to the old one. Also assume that Cape Verde switched on 734 the same date as the rest, not in 1907. This affects 735 Africa/Bissau, Africa/Sao_Tome, Asia/Macau, Atlantic/Azores, 736 Atlantic/Cape_Verde, Atlantic/Madeira, and Europe/Lisbon. 737 (Thanks to Michael Deckers.) 738 739 Fix an off-by-1 error for pre-1913 timestamps in Jamaica and in 740 Turks & Caicos. 741 742 Changes to past time zone abbreviations 743 744 MMT took effect in Uruguay from 1908-06-10, not 1898-06-28. There 745 is no clock change associated with the transition. 746 747 Changes to build procedure 748 749 The new DATAFORM macro in the Makefile lets the installer choose 750 among three source data formats. The idea is to lessen downstream 751 disruption when data formats are improved. 752 753 * DATAFORM=vanguard installs from the latest, bleeding-edge 754 format. DATAFORM=main (the default) installs from the format 755 used in the 'africa' etc. files. DATAFORM=rearguard installs 756 from a trailing-edge format. Eventually, elements of today's 757 vanguard format should move to the main format, and similarly 758 the main format's features should eventually move to the 759 rearguard format. 760 761 * In the current version, the main and rearguard formats are 762 identical and match that of 2018c, so this change does not 763 affect default behavior. The vanguard format currently contains 764 one feature not in the main format: negative SAVE values. This 765 improves support for Ireland, which uses Irish Standard Time 766 (IST, UTC+01) in summer and GMT (UTC) in winter. tzcode has 767 supported negative SAVE values for decades, and this feature 768 should move to the main format soon. However, it will not move 769 to the rearguard format for quite some time because some 770 downstream parsers do not support it. 771 772 * The build procedure constructs three files vanguard.zi, main.zi, 773 and rearguard.zi, one for each format. Although the files 774 represent essentially the same data, they may have minor 775 discrepancies that users are not likely to notice. The files 776 are intended for downstream data consumers and are not 777 installed. Zoneinfo parsers that do not support negative SAVE values 778 should start using rearguard.zi, so that they will be unaffected 779 when the negative-DST feature moves from vanguard to main. 780 Bleeding-edge Zoneinfo parsers that support the new features 781 already can use vanguard.zi; in this respect, current tzcode is 782 bleeding-edge. 783 784 The Makefile should now be safe for parallelized builds, and 'make 785 -j to2050new.tzs' is now much faster on a multiprocessor host 786 with GNU Make. 787 788 When built with -DSUPPRESS_TZDIR, the tzcode library no longer 789 prepends TZDIR/ to file names that do not begin with '/'. This is 790 not recommended for general use, due to its security implications. 791 (From a suggestion by Manuela Friedrich.) 792 793 Changes to code 794 795 zic now accepts subsecond precision in expressions like 796 00:19:32.13, which is approximately the legal time of the 797 Netherlands from 1835 to 1937. However, because it is 798 questionable whether the few recorded uses of non-integer offsets 799 had subsecond precision in practice, there are no plans for tzdata 800 to use this feature. (Thanks to Steve Allen for pointing out 801 the limitations of historical data in this area.) 802 803 The code is a bit more portable to MS-Windows. Installers can 804 compile with -DRESERVE_STD_EXT_IDS on MS-Windows platforms that 805 reserve identifiers like 'localtime'. (Thanks to Manuela 806 Friedrich.) 807 808 Changes to documentation and commentary 809 810 theory.html now outlines tzdb's extensions to POSIX's model for 811 civil time, and has a section "POSIX features no longer needed" 812 that lists POSIX API components that are now vestigial. 813 (From suggestions by Steve Summit.) It also better distinguishes 814 time zones from tz regions. (From a suggestion by Guy Harris.) 815 816 Commentary is now more consistent about using the phrase "daylight 817 saving time", to match the C name tm_isdst. Daylight saving time 818 need not occur in summer, and need not have a positive offset from 819 standard time. 820 821 Commentary about historical transitions in Uruguay has been expanded 822 with links to many relevant legal documents. 823 (Thanks to Tim Parenti.) 824 825 Commentary now uses some non-ASCII characters with Unicode value 826 less than U+0100, as they can be useful and should work even with 827 older editors such as XEmacs. 828 829 830 Release 2018c - 2018-01-22 23:00:44 -0800 831 832 Briefly: 833 Revert Irish changes that relied on negative SAVE values. 834 835 Changes to tm_isdst 836 837 Revert the 2018a change to Europe/Dublin. As before, this change 838 does not affect UT offsets or abbreviations; it affects only 839 whether timestamps are considered to be standard time or 840 daylight-saving time, as expressed in the tm_isdst flag of C's 841 struct tm type. This reversion is intended to be a temporary 842 workaround for problems discovered with downstream uses of 843 releases 2018a and 2018b, which implemented Irish time by using 844 negative SAVE values in the Eire rules of the 'europe' file. 845 Although negative SAVE values have been part of tzcode for many 846 years and are supported by many platforms, they were not 847 documented before 2018a and ICU and OpenJDK do not currently 848 support them. A mechanism to export data to platforms lacking 849 support for negative DST is planned to be developed before the 850 change is reapplied. (Problems reported by Deborah Goldsmith and 851 Stephen Colebourne.) 852 853 Changes to past timestamps 854 855 Japanese DST transitions (1948-1951) were Sundays at 00:00, not 856 Saturdays or Sundays at 02:00. (Thanks to Takayuki Nikai.) 857 858 Changes to build procedure 859 860 The build procedure now works around mawk 1.3.3's lack of support 861 for character class expressions. (Problem reported by Ohyama.) 862 863 864 Release 2018b - 2018-01-17 23:24:48 -0800 865 866 Briefly: 867 Fix a packaging problem in tz2018a, which was missing 'pacificnew'. 868 869 Changes to build procedure 870 871 The distribution now contains the file 'pacificnew' again. 872 This file was inadvertantly omitted in the 2018a distribution. 873 (Problem reported by Matias Fonzo.) 874 875 876 Release 2018a - 2018-01-12 22:29:21 -0800 877 878 Briefly: 879 So Tom and Prncipe switched from +00 to +01. 880 Brazil's DST will now start on November's first Sunday. 881 Ireland's standard time is now in the summer, not the winter. 882 Use Debian-style installation locations, instead of 4.3BSD-style. 883 New zic option -t. 884 885 Changes to past and future timestamps 886 887 So Tom and Prncipe switched from +00 to +01 on 2018-01-01 at 888 01:00. (Thanks to Steffen Thorsen and Michael Deckers.) 889 890 Changes to future timestamps 891 892 Starting in 2018 southern Brazil will begin DST on November's 893 first Sunday instead of October's third Sunday. (Thanks to 894 Steffen Thorsen.) 895 896 Changes to past timestamps 897 898 A discrepancy of 4 s in timestamps before 1931 in South Sudan has 899 been corrected. The 'backzone' and 'zone.tab' files did not agree 900 with the 'africa' and 'zone1970.tab' files. (Problem reported by 901 Michael Deckers.) 902 903 The abbreviation invented for Bolivia Summer Time (1931-2) is now 904 BST instead of BOST, to be more consistent with the convention 905 used for Latvian Summer Time (1918-9) and for British Summer Time. 906 907 Changes to tm_isdst 908 909 Change Europe/Dublin so that it observes Irish Standard Time (UT 910 +01) in summer and GMT (as negative daylight-saving) in winter, 911 instead of observing standard time (GMT) in winter and Irish 912 Summer Time (UT +01) in summer. This change does not affect UT 913 offsets or abbreviations; it affects only whether timestamps are 914 considered to be standard time or daylight-saving time, as 915 expressed in the tm_isdst flag of C's struct tm type. 916 (Discrepancy noted by Derick Rethans.) 917 918 Changes to build procedure 919 920 The default installation locations have been changed to mostly 921 match Debian circa 2017, instead of being designed as an add-on to 922 4.3BSD circa 1986. This affects the Makefile macros TOPDIR, 923 TZDIR, MANDIR, and LIBDIR. New Makefile macros TZDEFAULT, USRDIR, 924 USRSHAREDIR, BINDIR, ZDUMPDIR, and ZICDIR let installers tailor 925 locations more precisely. (This responds to suggestions from 926 Brian Inglis and from Steve Summit.) 927 928 The default installation procedure no longer creates the 929 backward-compatibility link US/Pacific-New, which causes 930 confusion during user setup (e.g., see Debian bug 815200). 931 Use 'make BACKWARD="backward pacificnew"' to create the link 932 anyway, for now. Eventually we plan to remove the link entirely. 933 934 tzdata.zi now contains a version-number comment. 935 (Suggested by Tom Lane.) 936 937 The Makefile now quotes values like BACKWARD more carefully when 938 passing them to the shell. (Problem reported by Zefram.) 939 940 Builders no longer need to specify -DHAVE_SNPRINTF on platforms 941 that have snprintf and use pre-C99 compilers. (Problem reported 942 by Jon Skeet.) 943 944 Changes to code 945 946 zic has a new option -t FILE that specifies the location of the 947 file that determines local time when TZ is unset. The default for 948 this location can be configured via the new TZDEFAULT makefile 949 macro, which defaults to /etc/localtime. 950 951 Diagnostics and commentary now distinguish UT from UTC more 952 carefully; see theory.html for more information about UT vs UTC. 953 954 zic has been ported to GCC 8's -Wstringop-truncation option. 955 (Problem reported by Martin Sebor.) 956 957 Changes to documentation and commentary 958 959 The zic man page now documents the longstanding behavior that 960 times and years can be out of the usual range, with negative times 961 counting backwards from midnight and with year 0 preceding year 1. 962 (Problem reported by Michael Deckers.) 963 964 The theory.html file now mentions the POSIX limit of six chars 965 per abbreviation, and lists alphabetic abbreviations used. 966 967 The files tz-art.htm and tz-link.htm have been renamed to 968 tz-art.html and tz-link.html, respectively, for consistency with 969 other file names and to simplify web server configuration. 970 971 972 Release 2017c - 2017-10-20 14:49:34 -0700 973 974 Briefly: 975 Northern Cyprus switches from +03 to +02/+03 on 2017-10-29. 976 Fiji ends DST 2018-01-14, not 2018-01-21. 977 Namibia switches from +01/+02 to +02 on 2018-04-01. 978 Sudan switches from +03 to +02 on 2017-11-01. 979 Tonga likely switches from +13/+14 to +13 on 2017-11-05. 980 Turks & Caicos switches from -04 to -05/-04 on 2018-11-04. 981 A new file tzdata.zi now holds a small text copy of all data. 982 The zic input format has been regularized slightly. 983 984 Changes to future timestamps 985 986 Northern Cyprus has decided to resume EU rules starting 987 2017-10-29, thus reinstituting winter time. 988 989 Fiji ends DST 2018-01-14 instead of the 2018-01-21 previously 990 predicted. (Thanks to Dominic Fok.) Adjust future predictions 991 accordingly. 992 993 Namibia will switch from +01 with DST to +02 all year on 994 2017-09-03 at 02:00. This affects UT offsets starting 2018-04-01 995 at 02:00. (Thanks to Steffen Thorsen.) 996 997 Sudan will switch from +03 to +02 on 2017-11-01. (Thanks to Ahmed 998 Atyya and Yahia Abdalla.) South Sudan is not switching, so 999 Africa/Juba is no longer a link to Africa/Khartoum. 1000 1001 Tonga has likely ended its experiment with DST, and will not 1002 adjust its clocks on 2017-11-05. Although Tonga has not announced 1003 whether it will continue to observe DST, the IATA is assuming that 1004 it will not. (Thanks to David Wade.) 1005 1006 Turks & Caicos will switch from -04 all year to -05 with US DST on 1007 2018-03-11 at 03:00. This affects UT offsets starting 2018-11-04 1008 at 02:00. (Thanks to Steffen Thorsen.) 1009 1010 Changes to past timestamps 1011 1012 Namibia switched from +02 to +01 on 1994-03-21, not 1994-04-03. 1013 (Thanks to Arthur David Olson.) 1014 1015 Detroit did not observe DST in 1967. 1016 1017 Use railway time for Asia/Kolkata before 1941, by switching to 1018 Madras local time (UT +052110) in 1870, then to IST (UT +0530) in 1019 1906. Also, treat 1941-2's +0630 as DST, like 1942-5. 1020 1021 Europe/Dublin's 1946 and 1947 fallback transitions occurred at 1022 02:00 standard time, not 02:00 DST. (Thanks to Michael Deckers.) 1023 1024 Pacific/Apia and Pacific/Pago_Pago switched from Antipodean to 1025 American time in 1892, not 1879. (Thanks to Michael Deckers.) 1026 1027 Adjust the 1867 transition in Alaska to better reflect the 1028 historical record, by changing it to occur on 1867-10-18 at 15:30 1029 Sitka time rather than at the start of 1867-10-17 local time. 1030 Although strictly speaking this is accurate only for Sitka, 1031 the rest of Alaska's blanks need to be filled in somehow. 1032 1033 Fix off-by-one errors in UT offsets for Adak and Nome before 1867. 1034 (Thanks to Michael Deckers.) 1035 1036 Add 7 s to the UT offset in Asia/Yangon before 1920. 1037 1038 Changes to zone names 1039 1040 Remove Canada/East-Saskatchewan from the 'backward' file, as it 1041 exceeded the 14-character limit and was an unused misnomer anyway. 1042 1043 Changes to build procedure 1044 1045 To support applications that prefer to read time zone data in text 1046 form, two zic input files tzdata.zi and leapseconds are now 1047 installed by default. The commands 'zic tzdata.zi' and 'zic -L 1048 leapseconds tzdata.zi' can reproduce the tzdata binary files 1049 without and with leap seconds, respectively. To prevent these two 1050 new files from being installed, use 'make TZDATA_TEXT=', and to 1051 suppress leap seconds from the tzdata text installation, use 'make 1052 TZDATA_TEXT=tzdata.zi'. 1053 1054 'make BACKWARD=' now suppresses backward-compatibility names 1055 like 'US/Pacific' that are defined in the 'backward' and 1056 'pacificnew' files. 1057 1058 'make check' now works on systems that lack a UTF-8 locale, 1059 or that lack the nsgmls program. Set UTF8_LOCALE to configure 1060 the name of a UTF-8 locale, if you have one. 1061 1062 Y2K runtime checks are no longer enabled by default. Add 1063 -DDEPRECATE_TWO_DIGIT_YEARS to CFLAGS to enable them, instead of 1064 adding -DNO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU 1065 to disable them. (New name suggested by Brian Inglis.) 1066 1067 The build procedure for zdump now works on AIX 7.1. 1068 (Problem reported by Kees Dekker.) 1069 1070 Changes to code 1071 1072 zic and the reference runtime now reject multiple leap seconds 1073 within 28 days of each other, or leap seconds before the Epoch. 1074 As a result, support for double leap seconds, which was 1075 obsolescent and undocumented, has been removed. Double leap 1076 seconds were an error in the C89 standard; they have never existed 1077 in civil timekeeping. (Thanks to Robert Elz and Bradley White for 1078 noticing glitches in the code that uncovered this problem.) 1079 1080 zic now warns about use of the obsolescent and undocumented -y 1081 option, and about use of the obsolescent TYPE field of Rule lines. 1082 1083 zic now allows unambiguous abbreviations like "Sa" and "Su" for 1084 weekdays; formerly it rejected them due to a bug. Conversely, zic 1085 no longer considers non-prefixes to be abbreviations; for example, 1086 it no longer accepts "lF" as an abbreviation for "lastFriday". 1087 Also, zic warns about the undocumented usage with a "last-" 1088 prefix, e.g., "last-Fri". 1089 1090 Similarly, zic now accepts the unambiguous abbreviation "L" for 1091 "Link" in ordinary context and for "Leap" in leap-second context. 1092 Conversely, zic no longer accepts non-prefixes such as "La" as 1093 abbreviations for words like "Leap". 1094 1095 zic no longer accepts leap second lines in ordinary input, or 1096 ordinary lines in leap second input. Formerly, zic sometimes 1097 warned about this undocumented usage and handled it incorrectly. 1098 1099 The new macro HAVE_TZNAME governs whether the tzname external 1100 variable is exported, instead of USG_COMPAT. USG_COMPAT now 1101 governs only the external variables "timezone" and "daylight". 1102 This change is needed because the three variables are not in the 1103 same category: although POSIX requires tzname, it specifies the 1104 other two variables as optional. Also, USG_COMPAT is now 1 or 0: 1105 if not defined, the code attempts to guess it from other macros. 1106 1107 localtime.c and difftime.c no longer require stdio.h, and .c files 1108 other than zic.c no longer require sys/wait.h. 1109 1110 zdump.c no longer assumes snprintf. (Reported by Jonathan Leffler.) 1111 1112 Calculation of time_t extrema works around a bug in GCC 4.8.4 1113 (Reported by Stan Shebs and Joseph Myers.) 1114 1115 zic.c no longer mistranslates formats of line numbers in non-English 1116 locales. (Problem reported by Benno Schulenberg.) 1117 1118 Several minor changes have been made to the code to make it a 1119 bit easier to port to MS-Windows and Solaris. (Thanks to Kees 1120 Dekker for reporting the problems.) 1121 1122 Changes to documentation and commentary 1123 1124 The two new files 'theory.html' and 'calendars' contain the 1125 contents of the removed file 'Theory'. The goal is to document 1126 tzdb theory more accessibly. 1127 1128 The zic man page now documents abbreviation rules. 1129 1130 tz-link.htm now covers how to apply tzdata changes to clients. 1131 (Thanks to Jorge Fbregas for the AIX link.) It also mentions MySQL. 1132 1133 The leap-seconds.list URL has been updated to something that is 1134 more reliable for tzdb. (Thanks to Tim Parenti and Brian Inglis.) 1135 1136 Release 2017b - 2017-03-17 07:30:38 -0700 1137 1138 Briefly: Haiti has resumed DST. 1139 1140 Changes to past and future timestamps 1141 1142 Haiti resumed observance of DST in 2017. (Thanks to Steffen Thorsen.) 1143 1144 Changes to past timestamps 1145 1146 Liberia changed from -004430 to +00 on 1972-01-07, not 1972-05-01. 1147 1148 Use "MMT" to abbreviate Liberia's time zone before 1972, as "-004430" 1149 is one byte over the POSIX limit. (Problem reported by Derick Rethans.) 1150 1151 Changes to code 1152 1153 The reference localtime implementation now falls back on the 1154 current US daylight-saving transition rules rather than the 1155 1987-2006 rules. This fallback occurs only when (1) the TZ 1156 environment variable has a value like "AST4ADT" that asks 1157 for daylight saving time but does not specify the rules, (2) there 1158 is no file by that name, and (3) the TZDEFRULES file cannot be 1159 loaded. (Thanks to Tom Lane.) 1160 1161 1162 Release 2017a - 2017-02-28 00:05:36 -0800 1163 1164 Briefly: Southern Chile moves from -04/-03 to -03, and Mongolia 1165 discontinues DST. 1166 1167 Changes to future timestamps 1168 1169 Mongolia no longer observes DST. (Thanks to Ganbold Tsagaankhuu.) 1170 1171 Chile's Region of Magallanes moves from -04/-03 to -03 year-round. 1172 Its clocks diverge from America/Santiago starting 2017-05-13 at 1173 23:00, hiving off a new zone America/Punta_Arenas. Although the 1174 Chilean government says this change expires in May 2019, for now 1175 assume it's permanent. (Thanks to Juan Correa and Deborah 1176 Goldsmith.) This also affects Antarctica/Palmer. 1177 1178 Changes to past timestamps 1179 1180 Fix many entries for historical timestamps for Europe/Madrid 1181 before 1979, to agree with tables compiled by Pere Planesas of the 1182 National Astronomical Observatory of Spain. As a side effect, 1183 this changes some timestamps for Africa/Ceuta before 1929, which 1184 are probably guesswork anyway. (Thanks to Steve Allen and 1185 Pierpaolo Bernardi for the heads-ups, and to Michael Deckers for 1186 correcting the 1901 transition.) 1187 1188 Ecuador observed DST from 1992-11-28 to 1993-02-05. 1189 (Thanks to Alois Treindl.) 1190 1191 Asia/Atyrau and Asia/Oral were at +03 (not +04) before 1930-06-21. 1192 (Thanks to Stepan Golosunov.) 1193 1194 Changes to past and future time zone abbreviations 1195 1196 Switch to numeric time zone abbreviations for South America, as 1197 part of the ongoing project of removing invented abbreviations. 1198 This avoids the need to invent an abbreviation for the new Chilean 1199 new zone. Similarly, switch from invented to numeric time zone 1200 abbreviations for Afghanistan, American Samoa, the Azores, 1201 Bangladesh, Bhutan, the British Indian Ocean Territory, Brunei, 1202 Cape Verde, Chatham Is, Christmas I, Cocos (Keeling) Is, Cook Is, 1203 Dubai, East Timor, Eucla, Fiji, French Polynesia, Greenland, 1204 Indochina, Iran, Iraq, Kiribati, Lord Howe, Macquarie, Malaysia, 1205 the Maldives, Marshall Is, Mauritius, Micronesia, Mongolia, 1206 Myanmar, Nauru, Nepal, New Caledonia, Niue, Norfolk I, Palau, 1207 Papua New Guinea, the Philippines, Pitcairn, Qatar, Runion, St 1208 Pierre & Miquelon, Samoa, Saudi Arabia, Seychelles, Singapore, 1209 Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, Wallis & Futuna, and 1210 Xinjiang; for 20-minute daylight saving time in Ghana before 1943; 1211 for half-hour daylight saving time in Belize before 1944 and in 1212 the Dominican Republic before 1975; and for Canary Islands before 1213 1946, for Guinea-Bissau before 1975, for Iceland before 1969, for 1214 Indian Summer Time before 1942, for Indonesia before around 1964, 1215 for Kenya before 1960, for Liberia before 1973, for Madeira before 1216 1967, for Namibia before 1943, for the Netherlands in 1937-9, for 1217 Pakistan before 1971, for Western Sahara before 1977, and for 1218 Zaporozhye in 1880-1924. 1219 1220 For Alaska time from 1900 through 1967, instead of "CAT" use the 1221 abbreviation "AST", the abbreviation commonly used at the time 1222 (Atlantic Standard Time had not been standardized yet). Use "AWT" 1223 and "APT" instead of the invented abbreviations "CAWT" and "CAPT". 1224 1225 Use "CST" and "CDT" instead of invented abbreviations for Macau 1226 before 1999 and Taiwan before 1938, and use "JST" instead of the 1227 invented abbreviation "JCST" for Japan and Korea before 1938. 1228 1229 Change to database entry category 1230 1231 Move the Pacific/Johnston link from 'australasia' to 'backward', 1232 since Johnston is now uninhabited. 1233 1234 Changes to code 1235 1236 zic no longer mishandles some transitions in January 2038 when it 1237 attempts to work around Qt bug 53071. This fixes a bug affecting 1238 Pacific/Tongatapu that was introduced in zic 2016e. localtime.c 1239 now contains a workaround, useful when loading a file generated by 1240 a buggy zic. (Problem and localtime.c fix reported by Bradley 1241 White.) 1242 1243 zdump -i now outputs non-hour numeric time zone abbreviations 1244 without a colon, e.g., "+0530" rather than "+05:30". This agrees 1245 with zic %z and with common practice, and simplifies auditing of 1246 zdump output. 1247 1248 zdump is now buildable again with -DUSE_LTZ=0. 1249 (Problem reported by Joseph Myers.) 1250 1251 zdump.c now always includes private.h, to avoid code duplication 1252 with private.h. (Problem reported by Kees Dekker.) 1253 1254 localtime.c no longer mishandles early or late timestamps 1255 when TZ is set to a POSIX-style string that specifies DST. 1256 (Problem reported by Kees Dekker.) 1257 1258 date and strftime now cause %z to generate "-0000" instead of 1259 "+0000" when the UT offset is zero and the time zone abbreviation 1260 begins with "-". 1261 1262 Changes to documentation and commentary 1263 1264 The 'Theory' file now better documents choice of historical time 1265 zone abbreviations. (Problems reported by Michael Deckers.) 1266 1267 tz-link.htm now covers leap smearing, which is popular in clouds. 1268 1269 1270 Release 2016j - 2016-11-22 23:17:13 -0800 1271 1272 Briefly: Saratov, Russia moves from +03 to +04 on 2016-12-04. 1273 1274 Changes to future timestamps 1275 1276 Saratov, Russia switches from +03 to +04 on 2016-12-04 at 02:00. 1277 This hives off a new zone Europe/Saratov from Europe/Volgograd. 1278 (Thanks to Yuri Konotopov and Stepan Golosunov.) 1279 1280 Changes to past timestamps 1281 1282 The new zone Asia/Atyrau for Atyra Region, Kazakhstan, is like 1283 Asia/Aqtau except it switched from +05/+06 to +04/+05 in spring 1284 1999, not fall 1994. (Thanks to Stepan Golosunov.) 1285 1286 Changes to past time zone abbreviations 1287 1288 Asia/Gaza and Asia/Hebron now use "EEST", not "EET", to denote 1289 summer time before 1948. The old use of "EET" was a typo. 1290 1291 Changes to code 1292 1293 zic no longer mishandles file systems that lack hard links, fixing 1294 bugs introduced in 2016g. (Problems reported by Tom Lane.) 1295 Also, when the destination already contains symbolic links, zic 1296 should now work better on systems where the 'link' system call 1297 does not follow symbolic links. 1298 1299 Changes to documentation and commentary 1300 1301 tz-link.htm now documents the relationship between release version 1302 numbers and development-repository commit tags. (Suggested by 1303 Paul Koning.) 1304 1305 The 'Theory' file now documents UT. 1306 1307 iso3166.tab now accents "Curaao", and commentary now mentions 1308 the names "Cabo Verde" and "Czechia". (Thanks to Ji Boh.) 1309 1310 1311 Release 2016i - 2016-11-01 23:19:52 -0700 1312 1313 Briefly: Cyprus split into two time zones on 2016-10-30, and Tonga 1314 reintroduces DST on 2016-11-06. 1315 1316 Changes to future timestamps 1317 1318 Pacific/Tongatapu begins DST on 2016-11-06 at 02:00, ending on 1319 2017-01-15 at 03:00. Assume future observances in Tonga will be 1320 from the first Sunday in November through the third Sunday in 1321 January, like Fiji. (Thanks to Pulu Anau.) Switch to numeric 1322 time zone abbreviations for this zone. 1323 1324 Changes to past and future timestamps 1325 1326 Northern Cyprus is now +03 year round, causing a split in Cyprus 1327 time zones starting 2016-10-30 at 04:00. This creates a zone 1328 Asia/Famagusta. (Thanks to Even Scharning and Matt Johnson.) 1329 1330 Antarctica/Casey switched from +08 to +11 on 2016-10-22. 1331 (Thanks to Steffen Thorsen.) 1332 1333 Changes to past timestamps 1334 1335 Several corrections were made for pre-1975 timestamps in Italy. 1336 These affect Europe/Malta, Europe/Rome, Europe/San_Marino, and 1337 Europe/Vatican. 1338 1339 First, the 1893-11-01 00:00 transition in Italy used the new UT 1340 offset (+01), not the old (+00:49:56). (Thanks to Michael 1341 Deckers.) 1342 1343 Second, rules for daylight saving in Italy were changed to agree 1344 with Italy's National Institute of Metrological Research (INRiM) 1345 except for 1944, as follows (thanks to Pierpaolo Bernardi, Brian 1346 Inglis, and Michael Deckers): 1347 1348 The 1916-06-03 transition was at 24:00, not 00:00. 1349 1350 The 1916-10-01, 1919-10-05, and 1920-09-19 transitions were at 1351 00:00, not 01:00. 1352 1353 The 1917-09-30 and 1918-10-06 transitions were at 24:00, not 1354 01:00. 1355 1356 The 1944-09-17 transition was at 03:00, not 01:00. This 1357 particular change is taken from Italian law as INRiM's table, 1358 (which says 02:00) appears to have a typo here. Also, keep the 1359 1944-04-03 transition for Europe/Rome, as Rome was controlled by 1360 Germany then. 1361 1362 The 1967-1970 and 1972-1974 fallback transitions were at 01:00, 1363 not 00:00. 1364 1365 Changes to code 1366 1367 The code should now be buildable on AmigaOS merely by setting the 1368 appropriate Makefile variables. (From a patch by Carsten Larsen.) 1369 1370 1371 Release 2016h - 2016-10-19 23:17:57 -0700 1372 1373 Changes to future timestamps 1374 1375 Asia/Gaza and Asia/Hebron end DST on 2016-10-29 at 01:00, not 1376 2016-10-21 at 00:00. (Thanks to Sharef Mustafa.) Predict that 1377 future fall transitions will be on the last Saturday of October 1378 at 01:00, which is consistent with predicted spring transitions 1379 on the last Saturday of March. (Thanks to Tim Parenti.) 1380 1381 Changes to past timestamps 1382 1383 In Turkey, transitions in 1986-1990 were at 01:00 standard time 1384 not at 02:00, and the spring 1994 transition was on March 20, not 1385 March 27. (Thanks to Kvan Yazan.) 1386 1387 Changes to past and future time zone abbreviations 1388 1389 Asia/Colombo now uses numeric time zone abbreviations like "+0530" 1390 instead of alphabetic ones like "IST" and "LKT". Various 1391 English-language sources use "IST", "LKT" and "SLST", with no 1392 working consensus. (Usage of "SLST" mentioned by Sadika 1393 Sumanapala.) 1394 1395 Changes to code 1396 1397 zic no longer mishandles relativizing file names when creating 1398 symbolic links like /etc/localtime, when these symbolic links 1399 are outside the usual directory hierarchy. This fixes a bug 1400 introduced in 2016g. (Problem reported by Andreas Stieger.) 1401 1402 Changes to build procedure 1403 1404 New rules 'traditional_tarballs' and 'traditional_signatures' for 1405 building just the traditional-format distribution. (Requested by 1406 Deborah Goldsmith.) 1407 1408 The file 'version' is now put into the tzdata tarball too. 1409 (Requested by Howard Hinnant.) 1410 1411 Changes to documentation and commentary 1412 1413 The 'Theory' file now has a section on interface stability. 1414 (Requested by Paul Koning.) It also mentions features like 1415 tm_zone and localtime_rz that have long been supported by the 1416 reference code. 1417 1418 tz-link.htm has improved coverage of time zone boundaries suitable 1419 for geolocation. (Thanks to heads-ups from Evan Siroky and Matt 1420 Johnson.) 1421 1422 The US commentary now mentions Allen and the "day of two noons". 1423 1424 The Fiji commentary mentions the government's 2016-10-03 press 1425 release. (Thanks to Raymond Kumar.) 1426 1427 1428 Release 2016g - 2016-09-13 08:56:38 -0700 1429 1430 Changes to future timestamps 1431 1432 Turkey switched from EET/EEST (+02/+03) to permanent +03, 1433 effective 2016-09-07. (Thanks to Burak AYDIN.) Use "+03" rather 1434 than an invented abbreviation for the new time. 1435 1436 New leap second 2016-12-31 23:59:60 UTC as per IERS Bulletin C 52. 1437 (Thanks to Tim Parenti.) 1438 1439 Changes to past timestamps 1440 1441 For America/Los_Angeles, spring-forward transition times have been 1442 corrected from 02:00 to 02:01 in 1948, and from 02:00 to 01:00 in 1443 1950-1966. 1444 1445 For zones using Soviet time on 1919-07-01, transitions to UT-based 1446 time were at 00:00 UT, not at 02:00 local time. The affected 1447 zones are Europe/Kirov, Europe/Moscow, Europe/Samara, and 1448 Europe/Ulyanovsk. (Thanks to Alexander Belopolsky.) 1449 1450 Changes to past and future time zone abbreviations 1451 1452 The Factory zone now uses the time zone abbreviation -00 instead 1453 of a long English-language string, as -00 is now the normal way to 1454 represent an undefined time zone. 1455 1456 Several zones in Antarctica and the former Soviet Union, along 1457 with zones intended for ships at sea that cannot use POSIX TZ 1458 strings, now use numeric time zone abbreviations instead of 1459 invented or obsolete alphanumeric abbreviations. The affected 1460 zones are Antarctica/Casey, Antarctica/Davis, 1461 Antarctica/DumontDUrville, Antarctica/Mawson, Antarctica/Rothera, 1462 Antarctica/Syowa, Antarctica/Troll, Antarctica/Vostok, 1463 Asia/Anadyr, Asia/Ashgabat, Asia/Baku, Asia/Bishkek, Asia/Chita, 1464 Asia/Dushanbe, Asia/Irkutsk, Asia/Kamchatka, Asia/Khandyga, 1465 Asia/Krasnoyarsk, Asia/Magadan, Asia/Omsk, Asia/Sakhalin, 1466 Asia/Samarkand, Asia/Srednekolymsk, Asia/Tashkent, Asia/Tbilisi, 1467 Asia/Ust-Nera, Asia/Vladivostok, Asia/Yakutsk, Asia/Yekaterinburg, 1468 Asia/Yerevan, Etc/GMT-14, Etc/GMT-13, Etc/GMT-12, Etc/GMT-11, 1469 Etc/GMT-10, Etc/GMT-9, Etc/GMT-8, Etc/GMT-7, Etc/GMT-6, Etc/GMT-5, 1470 Etc/GMT-4, Etc/GMT-3, Etc/GMT-2, Etc/GMT-1, Etc/GMT+1, Etc/GMT+2, 1471 Etc/GMT+3, Etc/GMT+4, Etc/GMT+5, Etc/GMT+6, Etc/GMT+7, Etc/GMT+8, 1472 Etc/GMT+9, Etc/GMT+10, Etc/GMT+11, Etc/GMT+12, Europe/Kaliningrad, 1473 Europe/Minsk, Europe/Samara, Europe/Volgograd, and 1474 Indian/Kerguelen. For Europe/Moscow the invented abbreviation MSM 1475 was replaced by +05, whereas MSK and MSD were kept as they are not 1476 our invention and are widely used. 1477 1478 Changes to zone names 1479 1480 Rename Asia/Rangoon to Asia/Yangon, with a backward compatibility link. 1481 (Thanks to David Massoud.) 1482 1483 Changes to code 1484 1485 zic no longer generates binary files containing POSIX TZ-like 1486 strings that disagree with the local time type after the last 1487 explicit transition in the data. This fixes a bug with 1488 Africa/Casablanca and Africa/El_Aaiun in some year-2037 timestamps 1489 on the reference platform. (Thanks to Alexander Belopolsky for 1490 reporting the bug and suggesting a way forward.) 1491 1492 If the installed localtime and/or posixrules files are symbolic 1493 links, zic now keeps them symbolic links when updating them, for 1494 compatibility with platforms like OpenSUSE where other programs 1495 configure these files as symlinks. 1496 1497 zic now avoids hard linking to symbolic links, avoids some 1498 unnecessary mkdir and stat system calls, and uses shorter file 1499 names internally. 1500 1501 zdump has a new -i option to generate transitions in a 1502 more-compact but still human-readable format. This option is 1503 experimental, and the output format may change in future versions. 1504 (Thanks to Jon Skeet for suggesting that an option was needed, 1505 and thanks to Tim Parenti and Chris Rovick for further comments.) 1506 1507 Changes to build procedure 1508 1509 An experimental distribution format is available, in addition 1510 to the traditional format which will continue to be distributed. 1511 The new format is a tarball tzdb-VERSION.tar.lz with signature 1512 file tzdb-VERSION.tar.lz.asc. It unpacks to a top-level directory 1513 tzdb-VERSION containing the code and data of the traditional 1514 two-tarball format, along with extra data that may be useful. 1515 (Thanks to Antonio Diaz Diaz, Oscar van Vlijmen, and many others 1516 for comments about the experimental format.) 1517 1518 The release version number is now more accurate in the usual case 1519 where releases are built from a Git repository. For example, if 1520 23 commits and some working-file changes have been made since 1521 release 2016g, the version number is now something like 1522 '2016g-23-g50556e3-dirty' instead of the misleading '2016g'. 1523 Tagged releases use the same version number format as before, 1524 e.g., '2016g'. To support the more-accurate version number, its 1525 specification has moved from a line in the Makefile to a new 1526 source file 'version'. 1527 1528 The experimental distribution contains a file to2050.tzs that 1529 contains what should be the output of 'zdump -i -c 2050' on 1530 primary zones. If this file is available, 'make check' now checks 1531 that zdump generates this output. 1532 1533 'make check_web' now works on Fedora-like distributions. 1534 1535 Changes to documentation and commentary 1536 1537 tzfile.5 now documents the new restriction on POSIX TZ-like 1538 strings that is now implemented by zic. 1539 1540 Comments now cite URLs for some 1917-1921 Russian DST decrees. 1541 (Thanks to Alexander Belopolsky.) 1542 1543 tz-link.htm mentions JuliaTime (thanks to Curtis Vogt) and Time4J 1544 (thanks to Meno Hochschild) and ThreeTen-Extra, and its 1545 description of Java 8 has been brought up to date (thanks to 1546 Stephen Colebourne). Its description of local time on Mars has 1547 been updated to match current practice, and URLs have been updated 1548 and some obsolete ones removed. 1549 1550 1551 Release 2016f - 2016-07-05 16:26:51 +0200 1552 1553 Changes affecting future timestamps 1554 1555 The Egyptian government changed its mind on short notice, and 1556 Africa/Cairo will not introduce DST starting 2016-07-07 after all. 1557 (Thanks to Mina Samuel.) 1558 1559 Asia/Novosibirsk switches from +06 to +07 on 2016-07-24 at 02:00. 1560 (Thanks to Stepan Golosunov.) 1561 1562 Changes to past and future timestamps 1563 1564 Asia/Novokuznetsk and Asia/Novosibirsk now use numeric time zone 1565 abbreviations instead of invented ones. 1566 1567 Changes affecting past timestamps 1568 1569 Europe/Minsk's 1992-03-29 spring-forward transition was at 02:00 not 00:00. 1570 (Thanks to Stepan Golosunov.) 1571 1572 1573 Release 2016e - 2016-06-14 08:46:16 -0700 1574 1575 Changes affecting future timestamps 1576 1577 Africa/Cairo observes DST in 2016 from July 7 to the end of October. 1578 Guess October 27 and 24:00 transitions. (Thanks to Steffen Thorsen.) 1579 For future years, guess April's last Thursday to October's last 1580 Thursday except for Ramadan. 1581 1582 Changes affecting past timestamps 1583 1584 Locations while uninhabited now use '-00', not 'zzz', as a 1585 placeholder time zone abbreviation. This is inspired by Internet 1586 RFC 3339 and is more consistent with numeric time zone 1587 abbreviations already used elsewhere. The change affects several 1588 arctic and antarctic locations, e.g., America/Cambridge_Bay before 1589 1920 and Antarctica/Troll before 2005. 1590 1591 Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was 1592 at 03:00, not 23:00 the previous day. (Thanks to Michael Deckers.) 1593 1594 Changes to code 1595 1596 zic now outputs a dummy transition at time 2**31 - 1 in zones 1597 whose POSIX-style TZ strings contain a '<'. This mostly works 1598 around Qt bug 53071 <https://bugreports.qt.io/browse/QTBUG-53071>. 1599 (Thanks to Zhanibek Adilbekov for reporting the Qt bug.) 1600 1601 Changes affecting documentation and commentary 1602 1603 tz-link.htm says why governments should give plenty of notice for 1604 time zone or DST changes, and refers to Matt Johnson's blog post. 1605 1606 tz-link.htm mentions Tzdata for Elixir. (Thanks to Matt Johnson.) 1607 1608 1609 Release 2016d - 2016-04-17 22:50:29 -0700 1610 1611 Changes affecting future timestamps 1612 1613 America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30. 1614 (Thanks to Alexander Krivenyshev for the heads-up.) 1615 1616 Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00. 1617 (Thanks to Alexander Krivenyshev and Matt Johnson.) 1618 1619 New zone Asia/Tomsk, split off from Asia/Novosibirsk. It covers 1620 Tomsk Oblast, Russia, which switches from +06 to +07 on 2016-05-29 1621 at 02:00. (Thanks to Stepan Golosunov.) 1622 1623 Changes affecting past timestamps 1624 1625 New zone Europe/Kirov, split off from Europe/Volgograd. It covers 1626 Kirov Oblast, Russia, which switched from +04/+05 to +03/+04 on 1627 1989-03-26 at 02:00, roughly a year after Europe/Volgograd made 1628 the same change. (Thanks to Stepan Golosunov.) 1629 1630 Russia and nearby locations had daylight-saving transitions on 1631 1992-03-29 at 02:00 and 1992-09-27 at 03:00, instead of on 1632 1992-03-28 at 23:00 and 1992-09-26 at 23:00. (Thanks to Stepan 1633 Golosunov.) 1634 1635 Many corrections to historical time in Kazakhstan from 1991 1636 through 2005. (Thanks to Stepan Golosunov.) Replace Kazakhstan's 1637 invented time zone abbreviations with numeric abbreviations. 1638 1639 Changes to commentary 1640 1641 Mention Internet RFCs 7808 (TZDIST) and 7809 (CalDAV time zone references). 1642 1643 1644 Release 2016c - 2016-03-23 00:51:27 -0700 1645 1646 Changes affecting future timestamps 1647 1648 Azerbaijan no longer observes DST. (Thanks to Steffen Thorsen.) 1649 1650 Chile reverts from permanent to seasonal DST. (Thanks to Juan 1651 Correa for the heads-up, and to Tim Parenti for corrections.) 1652 Guess that future transitions are August's and May's second 1653 Saturdays at 24:00 mainland time. Also, call the period from 1654 2014-09-07 through 2016-05-14 daylight saving time instead of 1655 standard time, as that seems more appropriate now. 1656 1657 Changes affecting past timestamps 1658 1659 Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to 1660 +02/+03 on 1989-03-26, not 1991-03-31. Europe/Volgograd changed 1661 from +04/+05 to +03/+04 on 1988-03-27, not 1989-03-26. 1662 (Thanks to Stepan Golosunov.) 1663 1664 Changes to commentary 1665 1666 Several updates and URLs for historical and proposed Russian changes. 1667 (Thanks to Stepan Golosunov, Matt Johnson, and Alexander Krivenyshev.) 1668 1669 1670 Release 2016b - 2016-03-12 17:30:14 -0800 1671 1672 Compatibility note 1673 1674 Starting with release 2016b, some data entries cause zic implementations 1675 derived from tz releases 2005j through 2015e to issue warnings like 1676 "time zone abbreviation differs from POSIX standard (+03)". 1677 These warnings should not otherwise affect zic's output and can safely be 1678 ignored on today's platforms, as the warnings refer to a restriction in 1679 POSIX.1-1988 that was removed in POSIX.1-2001. One way to suppress the 1680 warnings is to upgrade to zic derived from tz releases 2015f and later. 1681 1682 Changes affecting future timestamps 1683 1684 New zones Europe/Astrakhan and Europe/Ulyanovsk for Astrakhan and 1685 Ulyanovsk Oblasts, Russia, both of which will switch from +03 to +04 on 1686 2016-03-27 at 02:00 local time. They need distinct zones since their 1687 post-1970 histories disagree. New zone Asia/Barnaul for Altai Krai and 1688 Altai Republic, Russia, which will switch from +06 to +07 on the same date 1689 and local time. The Astrakhan change is already official; the others have 1690 passed the first reading in the State Duma and are extremely likely. 1691 Also, Asia/Sakhalin moves from +10 to +11 on 2016-03-27 at 02:00. 1692 (Thanks to Alexander Krivenyshev for the heads-up, and to Matt Johnson 1693 and Stepan Golosunov for followup.) 1694 1695 As a trial of a new system that needs less information to be made up, 1696 the new zones use numeric time zone abbreviations like "+04" 1697 instead of invented abbreviations like "ASTT". 1698 1699 Haiti will not observe DST in 2016. (Thanks to Jean Antoine via 1700 Steffen Thorsen.) 1701 1702 Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00. 1703 (Thanks to Hannah Kreitem.) Guess future transitions will be March's last 1704 Saturday at 01:00, not March's last Friday at 24:00. 1705 1706 Changes affecting past timestamps 1707 1708 Europe/Chisinau observed DST during 1990, and switched from +04 to 1709 +03 at 1990-05-06 02:00, instead of switching from +03 to +02. 1710 (Thanks to Stepan Golosunov.) 1711 1712 1991 abbreviations in Europe/Samara should be SAMT/SAMST, not 1713 KUYT/KUYST. (Thanks to Stepan Golosunov.) 1714 1715 Changes to code 1716 1717 tzselect's diagnostics and checking, and checktab.awk's checking, 1718 have been improved. (Thanks to J William Piggott.) 1719 1720 tzcode now builds under MinGW. (Thanks to Ian Abbott and Esben Haabendal.) 1721 1722 tzselect now tests Julian-date TZ settings more accurately. 1723 (Thanks to J William Piggott.) 1724 1725 Changes to commentary 1726 1727 Comments in zone tables have been improved. (Thanks to J William Piggott.) 1728 1729 tzselect again limits its menu comments so that menus fit on a 1730 2480 alphanumeric display. 1731 1732 A new web page tz-how-to.html. (Thanks to Bill Seymour.) 1733 1734 In the Theory file, the description of possible time zone abbreviations in 1735 tzdata has been cleaned up, as the old description was unclear and 1736 inconsistent. (Thanks to Alain Mouette for reporting the problem.) 1737 1738 1739 Release 2016a - 2016-01-26 23:28:02 -0800 1740 1741 Changes affecting future timestamps 1742 1743 America/Cayman will not observe daylight saving this year after all. 1744 Revert our guess that it would. (Thanks to Matt Johnson.) 1745 1746 Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00. 1747 (Thanks to Alexander Krivenyshev.) 1748 1749 Asia/Tehran now has DST predictions for the year 2038 and later, 1750 to be March 21 00:00 to September 21 00:00. This is likely better 1751 than predicting no DST, albeit off by a day every now and then. 1752 1753 Changes affecting past and future timestamps 1754 1755 America/Metlakatla switched from PST all year to AKST/AKDT on 1756 2015-11-01 at 02:00. (Thanks to Steffen Thorsen.) 1757 1758 America/Santa_Isabel has been removed, and replaced with a 1759 backward compatibility link to America/Tijuana. Its contents were 1760 apparently based on a misreading of Mexican legislation. 1761 1762 Changes affecting past timestamps 1763 1764 Asia/Karachi's two transition times in 2002 were off by a minute. 1765 (Thanks to Matt Johnson.) 1766 1767 Changes affecting build procedure 1768 1769 An installer can now combine leap seconds with use of the backzone file, 1770 e.g., with 'make PACKRATDATA=backzone REDO=posix_right zones'. 1771 The old 'make posix_packrat' rule is now marked as obsolescent. 1772 (Thanks to Ian Abbott for an initial implementation.) 1773 1774 Changes affecting documentation and commentary 1775 1776 A new file LICENSE makes it easier to see that the code and data 1777 are mostly public-domain. (Thanks to James Knight.) The three 1778 non-public-domain files now use the current (3-clause) BSD license 1779 instead of older versions of that license. 1780 1781 tz-link.htm mentions the BDE library (thanks to Andrew Paprocki), 1782 CCTZ (thanks to Tim Parenti), TimeJones.com, and has a new section 1783 on editing tz source files (with a mention of Sublime zoneinfo, 1784 thanks to Gilmore Davidson). 1785 1786 The Theory and asia files now mention the 2015 book "The Global 1787 Transformation of Time, 1870-1950", and cite a couple of reviews. 1788 1789 The America/Chicago entry now documents the informal use of US 1790 central time in Fort Pierre, South Dakota. (Thanks to Rick 1791 McDermid, Matt Johnson, and Steve Jones.) 1792 1793 1794 Release 2015g - 2015-10-01 00:39:51 -0700 1795 1796 Changes affecting future timestamps 1797 1798 Turkey's 2015 fall-back transition is scheduled for Nov. 8, not Oct. 25. 1799 (Thanks to Fatih.) 1800 1801 Norfolk moves from +1130 to +1100 on 2015-10-04 at 02:00 local time. 1802 (Thanks to Alexander Krivenyshev.) 1803 1804 Fiji's 2016 fall-back transition is scheduled for January 17, not 24. 1805 (Thanks to Ken Rylander.) 1806 1807 Fort Nelson, British Columbia will not fall back on 2015-11-01. It has 1808 effectively been on MST (-0700) since it advanced its clocks on 2015-03-08. 1809 New zone America/Fort_Nelson. (Thanks to Matt Johnson.) 1810 1811 Changes affecting past timestamps 1812 1813 Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00. 1814 1815 Changes affecting code 1816 1817 localtime no longer mishandles America/Anchorage after 2037. 1818 (Thanks to Bradley White for reporting the bug.) 1819 1820 On hosts with signed 32-bit time_t, localtime no longer mishandles 1821 Pacific/Fiji after 2038-01-16 14:00 UTC. 1822 1823 The localtime module allows the variables 'timezone', 'daylight', 1824 and 'altzone' to be in common storage shared with other modules, 1825 and declares them in case the system <time.h> does not. 1826 (Problems reported by Kees Dekker.) 1827 1828 On platforms with tm_zone, strftime.c now assumes it is not NULL. 1829 This simplifies the code and is consistent with zdump.c. 1830 (Problem reported by Christos Zoulas.) 1831 1832 Changes affecting documentation 1833 1834 The tzfile man page now documents that transition times denote the 1835 starts (not the ends) of the corresponding time periods. 1836 (Ambiguity reported by Bill Seymour.) 1837 1838 1839 Release 2015f - 2015-08-10 18:06:56 -0700 1840 1841 Changes affecting future timestamps 1842 1843 North Korea switches to +0830 on 2015-08-15. (Thanks to Steffen Thorsen.) 1844 The abbreviation remains "KST". (Thanks to Robert Elz.) 1845 1846 Uruguay no longer observes DST. (Thanks to Steffen Thorsen 1847 and Pablo Camargo.) 1848 1849 Changes affecting past and future timestamps 1850 1851 Moldova starts and ends DST at 00:00 UTC, not at 01:00 UTC. 1852 (Thanks to Roman Tudos.) 1853 1854 Changes affecting data format and code 1855 1856 zic's '-y YEARISTYPE' option is no longer documented. The TYPE 1857 field of a Rule line should now be '-'; the old values 'even', 1858 'odd', 'uspres', 'nonpres', 'nonuspres' were already undocumented. 1859 Although the implementation has not changed, these features do not 1860 work in the default installation, they are not used in the data, 1861 and they are now considered obsolescent. 1862 1863 zic now checks that two rules don't take effect at the same time. 1864 (Thanks to Jon Skeet and Arthur David Olson.) Constraints on 1865 simultaneity are now documented. 1866 1867 The two characters '%z' in a zone format now stand for the UT 1868 offset, e.g., '-07' for seven hours behind UT and '+0530' for 1869 five hours and thirty minutes ahead. This better supports time 1870 zone abbreviations conforming to POSIX.1-2001 and later. 1871 1872 Changes affecting installed data files 1873 1874 Comments for America/Halifax and America/Glace_Bay have been improved. 1875 (Thanks to Brian Inglis.) 1876 1877 Data entries have been simplified for Atlantic/Canary, Europe/Simferopol, 1878 Europe/Sofia, and Europe/Tallinn. This yields slightly smaller 1879 installed data files for Europe/Simferopol and Europe/Tallinn. 1880 It does not affect timestamps. (Thanks to Howard Hinnant.) 1881 1882 Changes affecting code 1883 1884 zdump and zic no longer warn about valid time zone abbreviations 1885 like '-05'. 1886 1887 Some Visual Studio 2013 warnings have been suppressed. 1888 (Thanks to Kees Dekker.) 1889 1890 'date' no longer sets the time of day and its -a, -d, -n and -t 1891 options have been removed. Long obsolescent, the implementation 1892 of these features had porting problems. Builders no longer need 1893 to configure HAVE_ADJTIME, HAVE_SETTIMEOFDAY, or HAVE_UTMPX_H. 1894 (Thanks to Kees Dekker for pointing out the problem.) 1895 1896 Changes affecting documentation 1897 1898 The Theory file mentions naming issues earlier, as these seem to be 1899 poorly publicized (thanks to Gilmore Davidson for reporting the problem). 1900 1901 tz-link.htm mentions Time Zone Database Parser (thanks to Howard Hinnant). 1902 1903 Mention that Herbert Samuel introduced the term "Summer Time". 1904 1905 1906 Release 2015e - 2015-06-13 10:56:02 -0700 1907 1908 Changes affecting future timestamps 1909 1910 Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00, 1911 not 06-13 and 07-18 as we had guessed. (Thanks to Milamber.) 1912 1913 Assume Cayman Islands will observe DST starting next year, using US rules. 1914 Although it isn't guaranteed, it is the most likely. 1915 1916 Changes affecting data format 1917 1918 The file 'iso3166.tab' now uses UTF-8, so that its entries can better 1919 spell the names of land Islands, Cte d'Ivoire, and Runion. 1920 1921 Changes affecting code 1922 1923 When displaying data, tzselect converts it to the current locale's 1924 encoding if the iconv command works. (Problem reported by random832.) 1925 1926 tzselect no longer mishandles Dominica, fixing a bug introduced 1927 in Release 2014f. (Problem reported by Owen Leibman.) 1928 1929 zic -l no longer fails when compiled with -DTZDEFAULT=\"/etc/localtime\". 1930 This fixes a bug introduced in Release 2014f. 1931 (Problem reported by Leonardo Chiquitto.) 1932 1933 1934 Release 2015d - 2015-04-24 08:09:46 -0700 1935 1936 Changes affecting future timestamps 1937 1938 Egypt will not observe DST in 2015 and will consider canceling it 1939 permanently. For now, assume no DST indefinitely. 1940 (Thanks to Ahmed Nazmy and Tim Parenti.) 1941 1942 Changes affecting past timestamps 1943 1944 America/Whitehorse switched from UT -09 to -08 on 1967-05-28, not 1945 1966-07-01. Also, Yukon's time zone history is documented better. 1946 (Thanks to Brian Inglis and Dennis Ferguson.) 1947 1948 Change affecting past and future time zone abbreviations 1949 1950 The abbreviations for Hawaii-Aleutian standard and daylight times 1951 have been changed from HAST/HADT to HST/HDT, as per US Government 1952 Printing Office style. This affects only America/Adak since 1983, 1953 as America/Honolulu was already using the new style. 1954 1955 Changes affecting code 1956 1957 zic has some minor performance improvements. 1958 1959 1960 Release 2015c - 2015-04-11 08:55:55 -0700 1961 1962 Changes affecting future timestamps 1963 1964 Egypt's spring-forward transition is at 24:00 on April's last Thursday, 1965 not 00:00 on April's last Friday. 2015's transition will therefore be on 1966 Thursday, April 30 at 24:00, not Friday, April 24 at 00:00. Similar fixes 1967 apply to 2026, 2037, 2043, etc. (Thanks to Steffen Thorsen.) 1968 1969 Changes affecting past timestamps 1970 1971 The following changes affect some pre-1991 Chile-related timestamps 1972 in America/Santiago, Antarctica/Palmer, and Pacific/Easter. 1973 1974 The 1910 transition was January 10, not January 1. 1975 1976 The 1918 transition was September 10, not September 1. 1977 1978 The UT -04 time observed from 1932 to 1942 is now considered to 1979 be standard time, not year-round DST. 1980 1981 Santiago observed DST (UT -03) from 1946-07-15 through 1982 1946-08-31, then reverted to standard time, then switched to -05 1983 on 1947-04-01. 1984 1985 Assume transitions before 1968 were at 00:00, since we have no data 1986 saying otherwise. 1987 1988 The spring 1988 transition was 1988-10-09, not 1988-10-02. 1989 The fall 1990 transition was 1990-03-11, not 1990-03-18. 1990 1991 Assume no UT offset change for Pacific/Easter on 1890-01-01, 1992 and omit all transitions on Pacific/Easter from 1942 through 1946 1993 since we have no data suggesting that they existed. 1994 1995 One more zone has been turned into a link, as it differed 1996 from an existing zone only for older timestamps. As usual, 1997 this change affects UT offsets in pre-1970 timestamps only. 1998 The zone's old contents have been moved to the 'backzone' file. 1999 The affected zone is America/Montreal. 2000 2001 Changes affecting commentary 2002 2003 Mention the TZUpdater tool. 2004 2005 Mention "The Time Now". (Thanks to Brandon Ramsey.) 2006 2007 2008 Release 2015b - 2015-03-19 23:28:11 -0700 2009 2010 Changes affecting future timestamps 2011 2012 Mongolia will start observing DST again this year, from the last 2013 Saturday in March at 02:00 to the last Saturday in September at 00:00. 2014 (Thanks to Ganbold Tsagaankhuu.) 2015 2016 Palestine will start DST on March 28, not March 27. Also, 2017 correct the fall 2014 transition from September 26 to October 24. 2018 Adjust future predictions accordingly. (Thanks to Steffen Thorsen.) 2019 2020 Changes affecting past timestamps 2021 2022 The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a 2023 regression. (Thanks to Stuart Bishop for reporting the problem.) 2024 2025 Some more zones have been turned into links, when they differed 2026 from existing zones only for older timestamps. As usual, 2027 these changes affect UT offsets in pre-1970 timestamps only. 2028 Their old contents have been moved to the 'backzone' file. 2029 The affected zones are: America/Antigua, America/Cayman, 2030 Pacific/Midway, and Pacific/Saipan. 2031 2032 Changes affecting time zone abbreviations 2033 2034 Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD". 2035 (Thanks to Hank W.) 2036 2037 Changes affecting code 2038 2039 Fix integer overflow bug in reference 'mktime' implementation. 2040 (Problem reported by Jrg Richter.) 2041 2042 Allow -Dtime_tz=time_t compilations, and allow -Dtime_tz=... libraries 2043 to be used in the same executable as standard-library time_t functions. 2044 (Problems reported by Bradley White.) 2045 2046 Changes affecting commentary 2047 2048 Cite the recent Mexican decree changing Quintana Roo's time zone. 2049 (Thanks to Carlos Ral Perasso.) 2050 2051 Likewise for the recent Chilean decree. (Thanks to Eduardo Romero Urra.) 2052 2053 Update info about Mars time. 2054 2055 2056 Release 2015a - 2015-01-29 22:35:20 -0800 2057 2058 Changes affecting future timestamps 2059 2060 The Mexican state of Quintana Roo, represented by America/Cancun, 2061 will shift from Central Time with DST to Eastern Time without DST 2062 on 2015-02-01 at 02:00. (Thanks to Steffen Thorsen and Gwillim Law.) 2063 2064 Chile will not change clocks in April or thereafter; its new standard time 2065 will be its old daylight saving time. This affects America/Santiago, 2066 Pacific/Easter, and Antarctica/Palmer. (Thanks to Juan Correa.) 2067 2068 New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49. 2069 (Thanks to Tim Parenti.) 2070 2071 Changes affecting past timestamps 2072 2073 Iceland observed DST in 1919 and 1921, and its 1939 fallback 2074 transition was Oct. 29, not Nov. 29. Remove incorrect data from 2075 Shanks about time in Iceland between 1837 and 1908. 2076 2077 Some more zones have been turned into links, when they differed 2078 from existing zones only for older timestamps. As usual, 2079 these changes affect UT offsets in pre-1970 timestamps only. 2080 Their old contents have been moved to the 'backzone' file. 2081 The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait, 2082 and Asia/Muscat. 2083 2084 Changes affecting code 2085 2086 tzalloc now scrubs time zone abbreviations compatibly with the way 2087 that tzset always has, by replacing invalid bytes with '_' and by 2088 shortening too-long abbreviations. 2089 2090 tzselect ports to POSIX awk implementations, no longer mishandles 2091 POSIX TZ settings when GNU awk is used, and reports POSIX TZ 2092 settings to the user. (Thanks to Stefan Kuhn.) 2093 2094 Changes affecting build procedure 2095 2096 'make check' now checks for links to links in the data. 2097 One such link (for Africa/Asmera) has been fixed. 2098 (Thanks to Stephen Colebourne for pointing out the problem.) 2099 2100 Changes affecting commentary 2101 2102 The leapseconds file commentary now mentions the expiration date. 2103 (Problem reported by Martin Burnicki.) 2104 2105 Update Mexican Library of Congress URL. 2106 2107 2108 Release 2014j - 2014-11-10 17:37:11 -0800 2109 2110 Changes affecting current and future timestamps 2111 2112 Turks & Caicos' switch from US eastern time to UT -04 year-round 2113 did not occur on 2014-11-02 at 02:00. It's currently scheduled 2114 for 2015-11-01 at 02:00. (Thanks to Chris Walton.) 2115 2116 Changes affecting past timestamps 2117 2118 Many pre-1989 timestamps have been corrected for Asia/Seoul and 2119 Asia/Pyongyang, based on sources for the Korean-language Wikipedia 2120 entry for time in Korea. (Thanks to Sanghyuk Jung.) Also, no 2121 longer guess that Pyongyang mimicked Seoul time after World War II, 2122 as this is politically implausible. 2123 2124 Some more zones have been turned into links, when they differed 2125 from existing zones only for older timestamps. As usual, 2126 these changes affect UT offsets in pre-1970 timestamps only. 2127 Their old contents have been moved to the 'backzone' file. 2128 The affected zones are: Africa/Addis_Ababa, Africa/Asmara, 2129 Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Kampala, 2130 Africa/Mogadishu, Indian/Antananarivo, Indian/Comoro, and 2131 Indian/Mayotte. 2132 2133 Changes affecting commentary 2134 2135 The commentary is less enthusiastic about Shanks as a source, 2136 and is more careful to distinguish UT from UTC. 2137 2138 2139 Release 2014i - 2014-10-21 22:04:57 -0700 2140 2141 Changes affecting future timestamps 2142 2143 Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00. 2144 (Thanks to Ken Rylander for the heads-up.) Guess that future 2145 years will use a similar pattern. 2146 2147 A new Zone Pacific/Bougainville, for the part of Papua New Guinea 2148 that plans to switch from UT +10 to +11 on 2014-12-28 at 02:00. 2149 (Thanks to Kiley Walbom for the heads-up.) 2150 2151 Changes affecting time zone abbreviations 2152 2153 Since Belarus is not changing its clocks even though Moscow is, 2154 the time zone abbreviation in Europe/Minsk is changing from FET 2155 to its more-traditional value MSK on 2014-10-26 at 01:00. 2156 (Thanks to Alexander Bokovoy for the heads-up about Belarus.) 2157 2158 The new abbreviation IDT stands for the pre-1976 use of UT +08 in 2159 Indochina, to distinguish it better from ICT (+07). 2160 2161 Changes affecting past timestamps 2162 2163 Many timestamps have been corrected for Asia/Ho_Chi_Minh before 1976 2164 (thanks to Trn Ngc Qun for an indirect pointer to Trn Tin Bnh's 2165 authoritative book). Asia/Ho_Chi_Minh has been added to 2166 zone1970.tab, to give tzselect users in Vietnam two choices, 2167 since north and south Vietnam disagreed after our 1970 cutoff. 2168 2169 Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as 2170 they differed from existing zones only for older timestamps. As 2171 usual, these changes affect pre-1970 timestamps only. Their old 2172 contents have been moved to the 'backzone' file. 2173 2174 Changes affecting code 2175 2176 The time-related library functions now set errno on failure, and 2177 some crashes in the new tzalloc-related library functions have 2178 been fixed. (Thanks to Christos Zoulas for reporting most of 2179 these problems and for suggesting fixes.) 2180 2181 If USG_COMPAT is defined and the requested timestamp is standard time, 2182 the tz library's localtime and mktime functions now set the extern 2183 variable timezone to a value appropriate for that timestamp; and 2184 similarly for ALTZONE, daylight saving time, and the altzone variable. 2185 This change is a companion to the tzname change in 2014h, and is 2186 designed to make timezone and altzone more compatible with tzname. 2187 2188 The tz library's functions now set errno to EOVERFLOW if they fail 2189 because the result cannot be represented. ctime and ctime_r now 2190 return NULL and set errno when a timestamp is out of range, rather 2191 than having undefined behavior. 2192 2193 Some bugs associated with the new 2014g functions have been fixed. 2194 This includes a bug that largely incapacitated the new functions 2195 time2posix_z and posix2time_z. (Thanks to Christos Zoulas.) 2196 It also includes some uses of uninitialized variables after tzalloc. 2197 The new code uses the standard type 'ssize_t', which the Makefile 2198 now gives porting advice about. 2199 2200 Changes affecting commentary 2201 2202 Updated URLs for NRC Canada (thanks to Matt Johnson and Brian Inglis). 2203 2204 2205 Release 2014h - 2014-09-25 18:59:03 -0700 2206 2207 Changes affecting past timestamps 2208 2209 America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28. 2210 2211 Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01, 2212 not 1920-01-06. The old entry was based on a misinterpretation of Shanks. 2213 2214 Some more zones have been turned into links, when they differed 2215 from existing zones only for older timestamps. As usual, 2216 these changes affect UT offsets in pre-1970 timestamps only. 2217 Their old contents have been moved to the 'backzone' file. 2218 The affected zones are: Africa/Blantyre, Africa/Bujumbura, 2219 Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi, 2220 Africa/Lusaka, Africa/Maseru, and Africa/Mbabane. 2221 2222 Changes affecting code 2223 2224 zdump -V and -v now output gmtoff= values on all platforms, 2225 not merely on platforms defining TM_GMTOFF. 2226 2227 The tz library's localtime and mktime functions now set tzname to a value 2228 appropriate for the requested timestamp, and zdump now uses this 2229 on platforms not defining TM_ZONE, fixing a 2014g regression. 2230 (Thanks to Tim Parenti for reporting the problem.) 2231 2232 The tz library no longer sets tzname if localtime or mktime fails. 2233 2234 zdump -c no longer mishandles transitions near year boundaries. 2235 (Thanks to Tim Parenti for reporting the problem.) 2236 2237 An access to uninitialized data has been fixed. 2238 (Thanks to Jrg Richter for reporting the problem.) 2239 2240 When THREAD_SAFE is defined, the code ports to the C11 memory model. 2241 A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined 2242 and two threads race to initialize data used by gmtime-like functions. 2243 (Thanks to Andy Heninger for reporting the problems.) 2244 2245 Changes affecting build procedure 2246 2247 'make check' now checks better for properly-sorted data. 2248 2249 Changes affecting documentation and commentary 2250 2251 zdump's gmtoff=N output is now documented, and its isdst=D output 2252 is now documented to possibly output D values other than 0 or 1. 2253 2254 zdump -c's treatment of years is now documented to use the 2255 Gregorian calendar and Universal Time without leap seconds, 2256 and its behavior at cutoff boundaries is now documented better. 2257 (Thanks to Arthur David Olson and Tim Parenti for reporting the problems.) 2258 2259 Programs are now documented to use the proleptic Gregorian calendar. 2260 (Thanks to Alan Barrett for the suggestion.) 2261 2262 Fractional-second GMT offsets have been documented for civil time 2263 in 19th-century Chennai, Jakarta, and New York. 2264 2265 2266 Release 2014g - 2014-08-28 12:31:23 -0700 2267 2268 Changes affecting future timestamps 2269 2270 Turks & Caicos is switching from US eastern time to UT -04 2271 year-round, modeled as a switch on 2014-11-02 at 02:00. 2272 [As noted in 2014j, this switch was later delayed.] 2273 2274 Changes affecting past timestamps 2275 2276 Time in Russia or the USSR before 1926 or so has been corrected by 2277 a few seconds in the following zones: Asia/Irkutsk, 2278 Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi, 2279 Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara. For 2280 Asia/Yekaterinburg the correction is a few minutes. (Thanks to 2281 Vladimir Karpinsky.) 2282 2283 The Portuguese decree of 1911-05-26 took effect on 1912-01-01. 2284 This affects 1911 timestamps in Africa/Bissau, Africa/Luanda, 2285 Atlantic/Azores, and Atlantic/Madeira. Also, Lisbon's pre-1912 2286 GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32. 2287 (Thanks to Stephen Colebourne for pointing to the decree.) 2288 2289 Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59. 2290 2291 A new file 'backzone' contains data which may appeal to 2292 connoisseurs of old timestamps, although it is out of scope for 2293 the tz database, is often poorly sourced, and contains some data 2294 that is known to be incorrect. The new file is not recommended 2295 for ordinary use and its entries are not installed by default. 2296 (Thanks to Lester Caine for the high-quality Jersey, Guernsey, and 2297 Isle of Man entries.) 2298 2299 Some more zones have been turned into links, when they differed 2300 from existing zones only for older timestamps. As usual, 2301 these changes affect UT offsets in pre-1970 timestamps only. 2302 Their old contents have been moved to the 'backzone' file. 2303 The affected zones are: Africa/Bangui, Africa/Brazzaville, 2304 Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda, 2305 Africa/Malabo, Africa/Niamey, and Africa/Porto-Novo. 2306 2307 Changes affecting code 2308 2309 Unless NETBSD_INSPIRED is defined to 0, the tz library now 2310 supplies functions for creating and using objects that represent 2311 timezones. The new functions are tzalloc, tzfree, localtime_rz, 2312 mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and 2313 time2posix_z. They are intended for performance: for example, 2314 localtime_rz (unlike localtime_r) is trivially thread-safe without 2315 locking. (Thanks to Christos Zoulas for proposing NetBSD-inspired 2316 functions, and to Alan Barrett and Jonathan Lennox for helping to 2317 debug the change.) 2318 2319 zdump now builds with the tz library unless USE_LTZ is defined to 0, 2320 This lets zdump use tz features even if the system library lacks them. 2321 To build zdump with the system library, use 'make CFLAGS=-DUSE_LTZ=0 2322 TZDOBJS=zdump.o CHECK_TIME_T_ALTERNATIVES='. 2323 2324 zdump now uses localtime_rz if available, as it's significantly faster, 2325 and it can help zdump better diagnose invalid timezone names. 2326 Define HAVE_LOCALTIME_RZ to 0 to suppress this. HAVE_LOCALTIME_RZ 2327 defaults to 1 if NETBSD_INSPIRED && USE_LTZ. When localtime_rz is 2328 not available, zdump now uses localtime_r and tzset if available, 2329 as this is a bit cleaner and faster than plain localtime. Compile 2330 with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system 2331 lacks these two functions. 2332 2333 If THREAD_SAFE is defined to 1, the tz library is now thread-safe. 2334 Although not needed for tz's own applications, which are single-threaded, 2335 this supports POSIX better if the tz library is used in multithreaded apps. 2336 2337 Some crashes have been fixed when zdump or the tz library is given 2338 invalid or outlandish input. 2339 2340 The tz library no longer mishandles leap seconds on platforms with 2341 unsigned time_t in timezones that lack ordinary transitions after 1970. 2342 2343 The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not 2344 already defined, to make it easier to configure on common platforms. 2345 Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this. 2346 2347 Unless the new macro UNINIT_TRAP is defined to 1, the tz code now 2348 assumes that reading uninitialized memory yields garbage values 2349 but does not cause other problems such as traps. 2350 2351 If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now 2352 more likely to guess right for ambiguous timestamps near 2353 transitions where tm_isdst does not change. 2354 2355 If HAVE_STRFTIME_L is defined to 1, the tz library now defines 2356 strftime_l for compatibility with recent versions of POSIX. 2357 Only the C locale is supported, though. HAVE_STRFTIME_L defaults 2358 to 1 on recent POSIX versions, and to 0 otherwise. 2359 2360 tzselect -c now uses a hybrid distance measure that works better 2361 in Africa. (Thanks to Alan Barrett for noting the problem.) 2362 2363 The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used, 2364 or when time_tz is defined. 2365 2366 When HAVE_UTMPX_H is set the 'date' command now builds on systems 2367 whose <utmpx.h> file does not define WTMPX_FILE, and when setting 2368 the date it updates the wtmpx file if _PATH_WTMPX is defined. 2369 This affects GNU/Linux and similar systems. 2370 2371 For easier maintenance later, some C code has been simplified, 2372 some lint has been removed, and the code has been tweaked so that 2373 plain 'make' is more likely to work. 2374 2375 The C type 'bool' is now used for boolean values, instead of 'int'. 2376 2377 The long-obsolete LOCALE_HOME code has been removed. 2378 2379 The long-obsolete 'gtime' function has been removed. 2380 2381 Changes affecting build procedure 2382 2383 'zdump' no longer links in ialloc.o, as it's not needed. 2384 2385 'make check_time_t_alternatives' no longer assumes GNU diff. 2386 2387 Changes affecting distribution tarballs 2388 2389 The files checktab.awk and zoneinfo2tdf.pl are now distributed in 2390 the tzdata tarball instead of the tzcode tarball, since they help 2391 maintain the data. The NEWS and Theory files are now also 2392 distributed in the tzdata tarball, as they're relevant for data. 2393 (Thanks to Alan Barrett for pointing this out.) Also, the 2394 leapseconds.awk file is no longer distributed in the tzcode 2395 tarball, since it belongs in the tzdata tarball (where 2014f 2396 inadvertently also distributed it). 2397 2398 Changes affecting documentation and commentary 2399 2400 A new file CONTRIBUTING is distributed. (Thanks to Tim Parenti for 2401 suggesting a CONTRIBUTING file, and to Tony Finch and Walter Harms 2402 for debugging it.) 2403 2404 The man pages have been updated to use function prototypes, 2405 to document thread-safe variants like localtime_r, and to document 2406 the NetBSD-inspired functions tzalloc, tzfree, localtime_rz, and 2407 mktime_z. 2408 2409 The fields in Link lines have been renamed to be more descriptive 2410 and more like the parameters of 'ln'. LINK-FROM has become TARGET, 2411 and LINK-TO has become LINK-NAME. 2412 2413 tz-link.htm mentions the IETF's tzdist working group; Windows 2414 Runtime etc. (thanks to Matt Johnson); and HP-UX's tztab. 2415 2416 Some broken URLs have been fixed in the commentary. (Thanks to 2417 Lester Caine.) 2418 2419 Commentary about Philippines DST has been updated, and commentary 2420 on pre-1970 time in India has been added. 2421 2422 2423 Release 2014f - 2014-08-05 17:42:36 -0700 2424 2425 Changes affecting future timestamps 2426 2427 Russia will subtract an hour from most of its time zones on 2014-10-26 2428 at 02:00 local time. (Thanks to Alexander Krivenyshev.) 2429 There are a few exceptions: Magadan Oblast (Asia/Magadan) and Zabaykalsky 2430 Krai are subtracting two hours; conversely, Chukotka Autonomous Okrug 2431 (Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka), Kemerovo Oblast 2432 (Asia/Novokuznetsk), and the Samara Oblast and the Udmurt Republic 2433 (Europe/Samara) are not changing their clocks. The changed zones are 2434 Europe/Kaliningrad, Europe/Moscow, Europe/Simferopol, Europe/Volgograd, 2435 Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk, 2436 Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Khandyga, 2437 Asia/Sakhalin, and Asia/Ust-Nera; Asia/Magadan will have two hours 2438 subtracted; and Asia/Novokuznetsk's time zone abbreviation is affected, 2439 but not its UTC offset. Two zones are added: Asia/Chita (split 2440 from Asia/Yakutsk, and also with two hours subtracted) and 2441 Asia/Srednekolymsk (split from Asia/Magadan, but with only one hour 2442 subtracted). (Thanks to Tim Parenti for much of the above.) 2443 2444 Changes affecting time zone abbreviations 2445 2446 Australian eastern time zone abbreviations are now AEST/AEDT not EST, 2447 and similarly for the other Australian zones. That is, for eastern 2448 standard and daylight saving time the abbreviations are AEST and AEDT 2449 instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT, 2450 and AWST/AWDT are now used instead of the former CST, CWST, and WST. 2451 This change does not affect UT offsets, only time zone abbreviations. 2452 (Thanks to Rich Tibbett and many others.) 2453 2454 Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07) 2455 effective 2014-10-26 at 02:00 local time. 2456 2457 The time zone abbreviation for Xinjiang Time (observed in rmqi) 2458 has been changed from URUT to XJT. (Thanks to Luther Ma.) 2459 2460 Prefer MSK/MSD for Moscow time in Russia, even in other cities. 2461 Similarly, prefer EET/EEST for eastern European time in Russia. 2462 2463 Change time zone abbreviations in (western) Samoa to use "ST" and 2464 "DT" suffixes, as this is more likely to match common practice. 2465 Prefix "W" to (western) Samoa time when its standard-time offset 2466 disagrees with that of American Samoa. 2467 2468 America/Metlakatla now uses PST, not MeST, to abbreviate its time zone. 2469 2470 Time zone abbreviations have been updated for Japan's two time 2471 zones used 1896-1937. JWST now stands for Western Standard 2472 Time, and JCST for Central Standard Time (formerly this was CJT). 2473 These abbreviations are now used for time in Korea, Taiwan, 2474 and Sakhalin while controlled by Japan. 2475 2476 Changes affecting past timestamps 2477 2478 China's five zones have been simplified to two, since the post-1970 2479 differences in the other three seem to have been imaginary. The 2480 zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been 2481 removed; backwards-compatibility links still work, albeit with 2482 different behaviors for timestamps before May 1980. Asia/Urumqi's 2483 1980 transition to UT +08 has been removed, so that it is now at 2484 +06 and not +08. (Thanks to Luther Ma and to Alois Treindl; 2485 Treindl sent helpful translations of two papers by Guo Qingsheng.) 2486 2487 Some zones have been turned into links, when they differed from existing 2488 zones only for older UT offsets where data entries were likely invented. 2489 These changes affect UT offsets in pre-1970 timestamps only. This is 2490 similar to the change in release 2013e, except this time for western 2491 Africa. The affected zones are: Africa/Bamako, Africa/Banjul, 2492 Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome, 2493 Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, and 2494 Atlantic/St_Helena. This also affects the backwards-compatibility 2495 link Africa/Timbuktu. (Thanks to Alan Barrett, Stephen Colebourne, 2496 Tim Parenti, and David Patte for reporting problems in earlier 2497 versions of this change.) 2498 2499 Asia/Shanghai's pre-standard-time UT offset has been changed from 2500 8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its 2501 transition to standard time has been changed from 1928 to 1901. 2502 2503 Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01, 2504 then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945. 2505 In 1946 it observed DST from 05-15 through 09-30; in 1947 2506 from 04-15 through 10-31; and in 1979 from 07-01 through 09-30. 2507 (Thanks to Yu-Cheng Chuang.) 2508 2509 Asia/Riyadh's transition to standard time is now 1947-03-14, not 1950. 2510 2511 Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not 2512 10-03 at 00:00. (Thanks to Konstantin Hyppnen.) 2513 2514 Pacific/Pago_Pago has been changed from UT -11:30 to -11 for the 2515 period from 1911 to 1950. 2516 2517 Pacific/Chatham has been changed to New Zealand standard time plus 2518 45 minutes for the period before 1957, reflecting a 1956 remark in 2519 the New Zealand parliament. 2520 2521 Europe/Budapest has several pre-1946 corrections: in 1918 the transition 2522 out of DST was on 09-16, not 09-29; in 1919 it was on 11-24, not 09-15; in 2523 1945 it was on 11-01, not 11-03; in 1941 the transition to DST was 04-08 2524 not 04-06 at 02:00; and there was no DST in 1920. 2525 2526 Africa/Accra is now assumed to have observed DST from 1920 through 1935. 2527 2528 Time in Russia before 1927 or so has been corrected by a few seconds in 2529 the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi, 2530 Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg, Europe/Helsinki, and 2531 Europe/Riga. Also, Moscow's location has been changed to its Kilometer 0 2532 point. (Thanks to Vladimir Karpinsky for the Moscow changes.) 2533 2534 Changes affecting data format 2535 2536 A new file 'zone1970.tab' supersedes 'zone.tab' in the installed data. 2537 The new file's extended format allows multiple country codes per zone. 2538 The older file is still installed but is deprecated; its format is 2539 not changing and it will still be distributed for a while, but new 2540 applications should use the new file. 2541 2542 The new file format simplifies maintenance of obscure locations. 2543 To test this, it adds coverage for the Crozet Islands and the 2544 Scattered Islands. (Thanks to Tobias Conradi and Antoine Leca.) 2545 2546 The file 'iso3166.tab' is planned to switch from ASCII to UTF-8. 2547 It is still ASCII now, but commentary about the switch has been added. 2548 The new file 'zone1970.tab' already uses UTF-8. 2549 2550 Changes affecting code 2551 2552 'localtime', 'mktime', etc. now use much less stack space if ALL_STATE 2553 is defined. (Thanks to Elliott Hughes for reporting the problem.) 2554 2555 'zic' no longer mishandles input when ignoring case in locales that 2556 are not compatible with English, e.g., unibyte Turkish locales when 2557 compiled with HAVE_GETTEXT. 2558 2559 Error diagnostics of 'zic' and 'yearistype' have been reworded so that 2560 they no longer use ASCII '-' as if it were a dash. 2561 2562 'zic' now rejects output file names that contain '.' or '..' components. 2563 (Thanks to Tim Parenti for reporting the problem.) 2564 2565 'zic -v' now warns about output file names that do not follow 2566 POSIX rules, or that contain a digit or '.'. (Thanks to Arthur 2567 David Olson for starting the ball rolling on this.) 2568 2569 Some lint has been removed when using GCC_DEBUG_FLAGS with GCC 4.9.0. 2570 2571 Changes affecting build procedure 2572 2573 'zic' no longer links in localtime.o and asctime.o, as they're not needed. 2574 (Thanks to John Cochran.) 2575 2576 Changes affecting documentation and commentary 2577 2578 The 'Theory' file documents legacy names, the longstanding 2579 exceptions to the POSIX-inspired file name rules. 2580 2581 The 'zic' documentation clarifies the role of time types when 2582 interpreting dates. (Thanks to Arthur David Olson.) 2583 2584 Documentation and commentary now prefer UTF-8 to US-ASCII, 2585 allowing the use of proper accents in foreign words and names. 2586 Code and data have not changed because of this. (Thanks to 2587 Garrett Wollman, Ian Abbott, and Guy Harris for helping to debug 2588 this.) 2589 2590 Non-HTML documentation and commentary now use plain-text URLs instead of 2591 HTML insertions, and are more consistent about bracketing URLs when they 2592 are not already surrounded by white space. (Thanks to suggestions by 2593 Steffen Nurpmeso.) 2594 2595 There is new commentary about Xujiahui Observatory, the five time-zone 2596 project in China from 1918 to 1949, timekeeping in Japanese-occupied 2597 Shanghai, and Tibet Time in the 1950s. The sharp-eyed can spot the 2598 warlord Jin Shuren in the data. 2599 2600 Commentary about the coverage of each Russian zone has been standardized. 2601 (Thanks to Tim Parenti.) 2602 2603 There is new commentary about contemporary timekeeping in Ethiopia. 2604 2605 Obsolete comments about a 2007 proposal for DST in Kuwait has been removed. 2606 2607 There is new commentary about time in Poland in 1919. 2608 2609 Proper credit has been given to DST inventor George Vernon Hudson. 2610 2611 Commentary about time in Metlakatla, AK and Resolute, NU has been 2612 improved, with a new source for the former. 2613 2614 In zone.tab, Pacific/Easter no longer mentions Salas y Gmez, as it 2615 is uninhabited. 2616 2617 Commentary about permanent Antarctic bases has been updated. 2618 2619 Several typos have been corrected. (Thanks to Tim Parenti for 2620 contributing some of these fixes.) 2621 2622 tz-link.htm now mentions the JavaScript libraries Moment Timezone, 2623 TimezoneJS.Date, Walltime-js, and Timezone. (Thanks to a heads-up 2624 from Matt Johnson.) Also, it mentions the Go 'latlong' package. 2625 (Thanks to a heads-up from Dirkjan Ochtman.) 2626 2627 The files usno1988, usno1989, usno1989a, usno1995, usno1997, and usno1998 2628 have been removed. These obsolescent US Naval Observatory entries were no 2629 longer helpful for maintenance. (Thanks to Tim Parenti for the suggestion.) 2630 2631 2632 Release 2014e - 2014-06-12 21:53:52 -0700 2633 2634 Changes affecting near-future timestamps 2635 2636 Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00. 2637 (Thanks to Imed Chihi.) Guess that from 2015 on Egypt will temporarily 2638 switch to standard time at 24:00 the last Thursday before Ramadan, and 2639 back to DST at 00:00 the first Friday after Ramadan. 2640 2641 Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00. (Thanks 2642 to Milamber Space Network.) Guess that from 2015 on Morocco will 2643 temporarily switch to standard time at 03:00 the last Saturday before 2644 Ramadan, and back to DST at 02:00 the first Saturday after Ramadan. 2645 2646 Changes affecting past timestamps 2647 2648 The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of 2649 "MSD" for Moscow's double daylight time in summer 1921. Also, a typo 2650 "VLASST" has been repaired to be "VLAST" for Vladivostok summer time 2651 in 1991. (Thanks to Hank W. for reporting the problems.) 2652 2653 Changes affecting commentary 2654 2655 tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the 2656 draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and 2657 removes stale pointers to World Time Explorer and WORLDTIME. 2658 2659 2660 Release 2014d - 2014-05-27 21:34:40 -0700 2661 2662 Changes affecting code 2663 2664 zic no longer generates files containing timestamps before the Big Bang. 2665 This works around GNOME glib bug 878 2666 <https://gitlab.gnome.org/GNOME/glib/issues/878> 2667 (Thanks to Leonardo Chiquitto for reporting the bug, and to 2668 Arthur David Olson and James Cloos for suggesting improvements to the fix.) 2669 2670 Changes affecting documentation 2671 2672 tz-link.htm now mentions GNOME. 2673 2674 2675 Release 2014c - 2014-05-13 07:44:13 -0700 2676 2677 Changes affecting near-future timestamps 2678 2679 Egypt observes DST starting 2014-05-15 at 24:00. 2680 (Thanks to Ahmad El-Dardiry and Gunther Vermier.) 2681 Details have not been announced, except that DST will not be observed 2682 during Ramadan. Guess that DST will stop during the same Ramadan dates as 2683 Morocco, and that Egypt's future spring and fall transitions will be the 2684 same as 2010 when it last observed DST, namely April's last Friday at 2685 00:00 to September's last Thursday at 23:00 standard time. Also, guess 2686 that Ramadan transitions will be at 00:00 standard time. 2687 2688 Changes affecting code 2689 2690 zic now generates transitions for minimum time values, eliminating guesswork 2691 when handling low-valued timestamps. (Thanks to Arthur David Olson.) 2692 2693 Port to Cygwin sans glibc. (Thanks to Arthur David Olson.) 2694 2695 Changes affecting commentary and documentation 2696 2697 Remove now-confusing comment about Jordan. (Thanks to Oleksii Nochovnyi.) 2698 2699 2700 Release 2014b - 2014-03-24 21:28:50 -0700 2701 2702 Changes affecting near-future timestamps 2703 2704 Crimea switches to Moscow time on 2014-03-30 at 02:00 local time. 2705 (Thanks to Alexander Krivenyshev.) Move its zone.tab entry from UA to RU. 2706 2707 New entry for Troll station, Antarctica. (Thanks to Paul-Inge Flakstad and 2708 Bengt-Inge Larsson.) This is currently an approximation; a better version 2709 will require the zic and localtime fixes mentioned below, and the plan is 2710 to wait for a while until at least the zic fixes propagate. 2711 2712 Changes affecting code 2713 2714 'zic' and 'localtime' no longer reject locations needing four transitions 2715 per year for the foreseeable future. (Thanks to Andrew Main (Zefram).) 2716 Also, 'zic' avoids some unlikely failures due to integer overflow. 2717 2718 Changes affecting build procedure 2719 2720 'make check' now detects Rule lines defined but never used. 2721 The NZAQ rules, an instance of this problem, have been removed. 2722 2723 Changes affecting commentary and documentation 2724 2725 Fix Tuesday/Thursday typo in description of time in Israel. 2726 (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.) 2727 2728 Microsoft Windows 8.1 doesn't support tz database names. (Thanks 2729 to Donald MacQueen.) Instead, the Microsoft Windows Store app 2730 library supports them. 2731 2732 Add comments about Johnston Island time in the 1960s. 2733 (Thanks to Lyle McElhaney.) 2734 2735 Morocco's 2014 DST start will be as predicted. 2736 (Thanks to Sebastien Willemijns.) 2737 2738 2739 Release 2014a - 2014-03-07 23:30:29 -0800 2740 2741 Changes affecting near-future timestamps 2742 2743 Turkey begins DST on 2014-03-31, not 03-30. (Thanks to Faruk Pasin for 2744 the heads-up, and to Tim Parenti for simplifying the update.) 2745 2746 Changes affecting past timestamps 2747 2748 Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00. 2749 (Thanks to Steffen Thorsen.) 2750 2751 Ukraine switched from Moscow to Eastern European time on 1990-07-01 2752 (not 1992-01-01), and observed DST during the entire next winter. 2753 (Thanks to Vladimir in Moscow via Alois Treindl.) 2754 2755 In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03. 2756 (Thanks to Avigdor Finkelstein.) 2757 2758 Changes affecting code 2759 2760 A uninitialized-storage bug in 'localtime' has been fixed. 2761 (Thanks to Logan Chien.) 2762 2763 Changes affecting the build procedure 2764 2765 The settings for 'make check_web' now default to Ubuntu 13.10. 2766 2767 Changes affecting commentary and documentation 2768 2769 The boundary of the US Pacific time zone is given more accurately. 2770 (Thanks to Alan Mintz.) 2771 2772 Chile's 2014 DST will be as predicted. (Thanks to Jos Miguel Garrido.) 2773 2774 Paraguay's 2014 DST will be as predicted. (Thanks to Carlos Ral Perasso.) 2775 2776 Better descriptions of countries with same time zone history as 2777 Trinidad and Tobago since 1970. (Thanks to Alan Barrett for suggestion.) 2778 2779 Several changes affect tz-link.htm, the main web page. 2780 2781 Mention Time.is (thanks to Even Scharning) and WX-now (thanks to 2782 David Braverman). 2783 2784 Mention xCal (Internet RFC 6321) and jCal. 2785 2786 Microsoft has some support for tz database names. 2787 2788 CLDR data formats include both XML and JSON. 2789 2790 Mention Maggiolo's map of solar vs standard time. 2791 (Thanks to Arthur David Olson.) 2792 2793 Mention TZ4Net. (Thanks to Matt Johnson.) 2794 2795 Mention the timezone-olson Haskell package. 2796 2797 Mention zeitverschiebung.net. (Thanks to Martin Jger.) 2798 2799 Remove moribund links to daylight-savings-time.info and to 2800 Simple Timer + Clocks. 2801 2802 Update two links. (Thanks to Oscar van Vlijmen.) 2803 2804 Fix some formatting glitches, e.g., remove random newlines from 2805 abbr elements' title attributes. 2806 2807 2808 Release 2013i - 2013-12-17 07:25:23 -0800 2809 2810 Changes affecting near-future timestamps: 2811 2812 Jordan switches back to standard time at 00:00 on December 20, 2013. 2813 The 2006-2011 transition schedule is planned to resume in 2014. 2814 (Thanks to Steffen Thorsen.) 2815 2816 Changes affecting past timestamps: 2817 2818 In 2004, Cuba began DST on March 28, not April 4. 2819 (Thanks to Steffen Thorsen.) 2820 2821 Changes affecting code 2822 2823 The compile-time flag NOSOLAR has been removed, as nowadays the 2824 benefit of slightly shrinking runtime table size is outweighed by the 2825 cost of disallowing potential future updates that exceed old limits. 2826 2827 Changes affecting documentation and commentary 2828 2829 The files solar87, solar88, and solar89 are no longer distributed. 2830 They were a negative experiment - that is, a demonstration that 2831 tz data can represent solar time only with some difficulty and error. 2832 Their presence in the distribution caused confusion, as Riyadh 2833 civil time was generally not solar time in those years. 2834 2835 tz-link.htm now mentions Noda Time. (Thanks to Matt Johnson.) 2836 2837 2838 Release 2013h - 2013-10-25 15:32:32 -0700 2839 2840 Changes affecting current and future timestamps: 2841 2842 Libya has switched its UT offset back to +02 without DST, instead 2843 of +01 with DST. (Thanks to Even Scharning.) 2844 2845 Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules. 2846 (Thanks to Gwillim Law.) 2847 2848 Changes affecting future timestamps: 2849 2850 Acre and (we guess) western Amazonas will switch from UT -04 to -05 2851 on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe. 2852 (Thanks to Steffen Thorsen.) 2853 2854 Add entries for DST transitions in Morocco in the year 2038. 2855 This avoids some year-2038 glitches introduced in 2013g. 2856 (Thanks to Yoshito Umaoka for reporting the problem.) 2857 2858 Changes affecting API 2859 2860 The 'tzselect' command no longer requires the 'select' command, 2861 and should now work with /bin/sh on more platforms. It also works 2862 around a bug in BusyBox awk before version 1.21.0. (Thanks to 2863 Patrick 'P. J.' McDermott and Alan Barrett.) 2864 2865 Changes affecting code 2866 2867 Fix localtime overflow bugs with 32-bit unsigned time_t. 2868 2869 zdump no longer assumes sscanf returns maximal values on overflow. 2870 2871 Changes affecting the build procedure 2872 2873 The builder can specify which programs to use, if any, instead of 2874 'ar' and 'ranlib', and libtz.a is now built locally before being 2875 installed. (Thanks to Michael Forney.) 2876 2877 A dependency typo in the 'zdump' rule has been fixed. 2878 (Thanks to Andrew Paprocki.) 2879 2880 The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f' 2881 work as specified by POSIX.2-1992 or later; this is portable nowadays. 2882 2883 'make clean' no longer removes 'leapseconds', since it's 2884 host-independent and is part of the distribution. 2885 2886 The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed. 2887 2888 Changes affecting documentation and commentary 2889 2890 tz-link.htm now mentions TC TIMEZONE's draft time zone service protocol 2891 (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle). 2892 2893 Update URLs in tz-link page. Add URLs for Microsoft Windows, since 2894 8.1 introduces tz support. Remove URLs for Tru64 and UnixWare (no 2895 longer maintained) and for old advisories. SOFA now does C. 2896 2897 Release 2013g - 2013-09-30 21:08:26 -0700 2898 2899 Changes affecting current and near-future timestamps 2900 2901 Morocco now observes DST from the last Sunday in March to the last 2902 Sunday in October, not April to September respectively. (Thanks 2903 to Steffen Thorsen.) 2904 2905 Changes affecting 'zic' 2906 2907 'zic' now runs on platforms that lack both hard links and symlinks. 2908 (Thanks to Theo Veenker for reporting the problem, for MinGW.) 2909 Also, fix some bugs on platforms that lack hard links but have symlinks. 2910 2911 'zic -v' again warns that Asia/Tehran has no POSIX environment variable 2912 to predict the far future, fixing a bug introduced in 2013e. 2913 2914 Changes affecting the build procedure 2915 2916 The 'leapseconds' file is again put into the tzdata tarball. 2917 Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to 2918 Matt Burgess and Ian Abbott.) The timestamps of these and other 2919 dependent files in tarballs are adjusted more consistently. 2920 2921 Changes affecting documentation and commentary 2922 2923 The README file is now part of the data tarball as well as the code. 2924 It now states that files are public domain unless otherwise specified. 2925 (Thanks to Andrew Main (Zefram) for asking for clarifications.) 2926 Its details about the 1989 release moved to a place of honor near 2927 the end of NEWS. 2928 2929 2930 Release 2013f - 2013-09-24 23:37:36 -0700 2931 2932 Changes affecting near-future timestamps 2933 2934 Tocantins will very likely not observe DST starting this spring. 2935 (Thanks to Steffen Thorsen.) 2936 2937 Jordan will likely stay at UT +03 indefinitely, and will not fall 2938 back this fall. 2939 2940 Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.) 2941 2942 Changes affecting API 2943 2944 The types of the global variables 'timezone' and 'altzone' (if present) 2945 have been changed back to 'long'. This is required for 'timezone' 2946 by POSIX, and for 'altzone' by common practice, e.g., Solaris 11. 2947 These variables were originally 'long' in the tz code, but were 2948 mistakenly changed to 'time_t' in 1987; nobody reported the 2949 incompatibility until now. The difference matters on x32, where 2950 'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.) 2951 2952 Changes affecting the build procedure 2953 2954 Avoid long strings in leapseconds.awk to work around a mawk bug. 2955 (Thanks to Cyril Baurand.) 2956 2957 Changes affecting documentation and commentary 2958 2959 New file 'NEWS' that contains release notes like this one. 2960 2961 Paraguay's law does not specify DST transition time; 00:00 is customary. 2962 (Thanks to Waldemar Villamayor-Venialbo.) 2963 2964 Minor capitalization fixes. 2965 2966 Changes affecting version-control only 2967 2968 The experimental GitHub repository now contains annotated and 2969 signed tags for recent releases, e.g., '2013e' for Release 2013e. 2970 Releases are tagged starting with 2012e; earlier releases were 2971 done differently, and tags would either not have a simple name or 2972 not exactly match what was released. 2973 2974 'make set-timestamps' is now simpler and a bit more portable. 2975 2976 2977 Release 2013e - 2013-09-19 23:50:04 -0700 2978 2979 Changes affecting near-future timestamps 2980 2981 This year Fiji will start DST on October 27, not October 20. 2982 (Thanks to David Wheeler for the heads-up.) For now, guess that 2983 Fiji will continue to spring forward the Sunday before the fourth 2984 Monday in October. 2985 2986 Changes affecting current and future time zone abbreviations 2987 2988 Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian 2989 time zone abbreviations since 1932. (Thanks to George Ziegler, 2990 Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and 2991 Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura, 2992 Asia/Makassar, and Asia/Pontianak. 2993 2994 Use ART (UT -03, standard time), rather than WARST (also -03, but 2995 daylight saving time) for San Luis, Argentina since 2009. 2996 2997 Changes affecting Godthb timestamps after 2037 if version mismatch 2998 2999 Allow POSIX-like TZ strings where the transition time's hour can 3000 range from -167 through 167, instead of the POSIX-required 0 3001 through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the 3002 new Fiji rules. This is a more-compact way to represent 3003 far-future timestamps for America/Godthab, America/Santiago, 3004 Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem, 3005 Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by 3006 this change. (Derived from a suggestion by Arthur David Olson.) 3007 3008 Allow POSIX-like TZ strings where daylight saving time is in 3009 effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western 3010 Argentina Summer Time all year. This supports a more-compact way 3011 to represent the 2013d data for America/Argentina/San_Luis. 3012 Because of the change for San Luis noted above this change does not 3013 affect the current data. (Thanks to Andrew Main (Zefram) for 3014 suggestions that improved this change.) 3015 3016 Where these two TZ changes take effect, there is a minor extension 3017 to the tz file format in that it allows new values for the 3018 embedded TZ-format string, and the tz file format version number 3019 has therefore been increased from 2 to 3 as a precaution. 3020 Version-2-based client code should continue to work as before for 3021 all timestamps before 2038. Existing version-2-based client code 3022 (tzcode, GNU/Linux, Solaris) has been tested on version-3-format 3023 files, and typically works in practice even for timestamps after 3024 2037; the only known exception is America/Godthab. 3025 3026 Changes affecting timestamps before 1970 3027 3028 Pacific/Johnston is now a link to Pacific/Honolulu. This corrects 3029 some errors before 1947. 3030 3031 Some zones have been turned into links, when they differ from existing 3032 zones only in older data entries that were likely invented or that 3033 differ only in LMT or transitions from LMT. These changes affect 3034 only timestamps before 1943. The affected zones are: 3035 Africa/Juba, America/Anguilla, America/Aruba, America/Dominica, 3036 America/Grenada, America/Guadeloupe, America/Marigot, 3037 America/Montserrat, America/St_Barthelemy, America/St_Kitts, 3038 America/St_Lucia, America/St_Thomas, America/St_Vincent, 3039 America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for 3040 confirming that the old Europe/Vaduz zone was wrong and the new 3041 link is better for WWII-era times.) 3042 3043 Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects 3044 America/Cayman, America/Jamaica and America/Grand_Turk timestamps 3045 from 1890 to 1912. 3046 3047 Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46. 3048 This affects Europe/Zurich timestamps from 1853 to 1894. (Thanks 3049 to Alois Treindl.) 3050 3051 Change the date of the circa-1850 Zurich transition from 1849-09-12 3052 to 1853-07-16, overriding Shanks with data from Messerli about 3053 postal and telegraph time in Switzerland. 3054 3055 Changes affecting time zone abbreviations before 1970 3056 3057 For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932, 3058 as Jakarta was called Batavia back then. 3059 3060 Changes affecting API 3061 3062 The 'zic' command now outputs a dummy transition when far-future 3063 data can't be summarized using a TZ string, and uses a 402-year 3064 window rather than a 400-year window. For the current data, this 3065 affects only the Asia/Tehran file. It does not affect any of the 3066 timestamps that this file represents, so zdump outputs the same 3067 information as before. (Thanks to Andrew Main (Zefram).) 3068 3069 The 'date' command has a new '-r' option, which lets you specify 3070 the integer time to display, a la FreeBSD. 3071 3072 The 'tzselect' command has two new options '-c' and '-n', which lets you 3073 select a zone based on latitude and longitude. 3074 3075 The 'zic' command's '-v' option now warns about constructs that 3076 require the new version-3 binary file format. (Thanks to Arthur 3077 David Olson for the suggestion.) 3078 3079 Support for floating-point time_t has been removed. 3080 It was always dicey, and POSIX no longer requires it. 3081 (Thanks to Eric Blake for suggesting to the POSIX committee to 3082 remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy 3083 Heninger, Arthur David Olson, and Alois Treindl, for reporting 3084 bugs and elucidating some of the corners of the old floating-point 3085 implementation.) 3086 3087 The signatures of 'offtime', 'timeoff', and 'gtime' have been 3088 changed back to the old practice of using 'long' to represent UT 3089 offsets. This had been inadvertently and mistakenly changed to 3090 'int_fast32_t'. (Thanks to Christos Zoulas.) 3091 3092 The code avoids undefined behavior on integer overflow in some 3093 more places, including gmtime, localtime, mktime and zdump. 3094 3095 Changes affecting the zdump utility 3096 3097 zdump now outputs "UT" when referring to Universal Time, not "UTC". 3098 "UTC" does not make sense for timestamps that predate the introduction 3099 of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen 3100 for clarifying UT vs UTC.) 3101 3102 Data changes affecting behavior of tzselect and similar programs 3103 3104 Country code BQ is now called the more-common name "Caribbean Netherlands" 3105 rather than the more-official "Bonaire, St Eustatius & Saba". 3106 3107 Remove from zone.tab the names America/Montreal, America/Shiprock, 3108 and Antarctica/South_Pole, as they are equivalent to existing 3109 same-country-code zones for post-1970 timestamps. The data entries for 3110 these names are unchanged, so the names continue to work as before. 3111 3112 Changes affecting code internals 3113 3114 zic -c now runs way faster on 64-bit hosts when given large numbers. 3115 3116 zic now uses vfprintf to avoid allocating and freeing some memory. 3117 3118 tzselect now computes the list of continents from the data, 3119 rather than have it hard-coded. 3120 3121 Minor changes pacify GCC 4.7.3 and GCC 4.8.1. 3122 3123 Changes affecting the build procedure 3124 3125 The 'leapseconds' file is now generated automatically from a 3126 new file 'leap-seconds.list', which is a copy of 3127 <ftp://ftp.nist.gov/pub/time/leap-seconds.list> 3128 A new source file 'leapseconds.awk' implements this. 3129 The goal is simplification of the future maintenance of 'leapseconds'. 3130 3131 When building the 'posix' or 'right' subdirectories, if the 3132 subdirectory would be a copy of the default subdirectory, it is 3133 now made a symbolic link if that is supported. This saves about 3134 2 MB of file system space. 3135 3136 The links America/Shiprock and Antarctica/South_Pole have been 3137 moved to the 'backward' file. This affects only nondefault builds 3138 that omit 'backward'. 3139 3140 Changes affecting version-control only 3141 3142 .gitignore now ignores 'date'. 3143 3144 Changes affecting documentation and commentary 3145 3146 Changes to the 'tzfile' man page 3147 3148 It now mentions that the binary file format may be extended in 3149 future versions by appending data. 3150 3151 It now refers to the 'zdump' and 'zic' man pages. 3152 3153 Changes to the 'zic' man page 3154 3155 It lists conditions that elicit a warning with '-v'. 3156 3157 It says that the behavior is unspecified when duplicate names 3158 are given, or if the source of one link is the target of another. 3159 3160 Its examples are updated to match the latest data. 3161 3162 The definition of white space has been clarified slightly. 3163 (Thanks to Michael Deckers.) 3164 3165 Changes to the 'Theory' file 3166 3167 There is a new section about the accuracy of the tz database, 3168 describing the many ways that errors can creep in, and 3169 explaining why so many of the pre-1970 timestamps are wrong or 3170 misleading (thanks to Steve Allen, Lester Caine, and Garrett 3171 Wollman for discussions that contributed to this). 3172 3173 The 'Theory' file describes LMT better (this follows a 3174 suggestion by Guy Harris). 3175 3176 It refers to the 2013 edition of POSIX rather than the 2004 edition. 3177 3178 It's mentioned that excluding 'backward' should not affect the 3179 other data, and it suggests at least one zone.tab name per 3180 inhabited country (thanks to Stephen Colebourne). 3181 3182 Some longstanding restrictions on names are documented, e.g., 3183 'America/New_York' precludes 'America/New_York/Bronx'. 3184 3185 It gives more reasons for the 1970 cutoff. 3186 3187 It now mentions which time_t variants are supported, such as 3188 signed integer time_t. (Thanks to Paul Goyette for reporting 3189 typos in an experimental version of this change.) 3190 3191 (Thanks to Philip Newton for correcting typos in these changes.) 3192 3193 Documentation and commentary is more careful to distinguish UT in 3194 general from UTC in particular. (Thanks to Steve Allen.) 3195 3196 Add a better source for the Zurich 1894 transition. 3197 (Thanks to Pierre-Yves Berger.) 3198 3199 Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.) 3200 3201 3202 Release 2013d - 2013-07-05 07:38:01 -0700 3203 3204 Changes affecting future timestamps: 3205 3206 Morocco's midsummer transitions this year are July 7 and August 10, 3207 not July 9 and August 8. (Thanks to Andrew Paprocki.) 3208 3209 Israel now falls back on the last Sunday of October. 3210 (Thanks to Ephraim Silverberg.) 3211 3212 Changes affecting past timestamps: 3213 3214 Specify Jerusalem's location more precisely; this changes the pre-1880 3215 times by 2 s. 3216 3217 Changing affecting metadata only: 3218 3219 Fix typos in the entries for country codes BQ and SX. 3220 3221 Changes affecting code: 3222 3223 Rework the code to fix a bug with handling Australia/Macquarie on 3224 32-bit hosts (thanks to Arthur David Olson). 3225 3226 Port to platforms like NetBSD, where time_t can be wider than long. 3227 3228 Add support for testing time_t types other than the system's. 3229 Run 'make check_time_t_alternatives' to try this out. 3230 Currently, the tests fail for unsigned time_t; 3231 this should get fixed at some point. 3232 3233 Changes affecting documentation and commentary: 3234 3235 Deemphasize the significance of national borders. 3236 3237 Update the zdump man page. 3238 3239 Remove obsolete NOID comment (thanks to Denis Excoffier). 3240 3241 Update several URLs and comments in the web pages. 3242 3243 Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler). 3244 3245 Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka). 3246 3247 3248 Release 2013c - 2013-04-19 16:17:40 -0700 3249 3250 Changes affecting current and future timestamps: 3251 3252 Palestine observed DST starting March 29, 2013. (Thanks to 3253 Steffen Thorsen.) From 2013 on, Gaza and Hebron both observe DST, 3254 with the predicted rules being the last Thursday in March at 24:00 3255 to the first Friday on or after September 21 at 01:00. 3256 3257 Assume that the recent change to Paraguay's DST rules is permanent, 3258 by moving the end of DST to the 4th Sunday in March every year. 3259 (Thanks to Carlos Ral Perasso.) 3260 3261 Changes affecting past timestamps: 3262 3263 Fix some historical data for Palestine to agree with that of 3264 timeanddate.com, as follows: 3265 3266 The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not 3267 00:00 Apr 1. 3268 3269 The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not 3270 02:00. 3271 3272 The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27. 3273 3274 The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2. 3275 3276 The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01. 3277 3278 The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00. 3279 3280 Fix times of habitation for Macquarie to agree with the Tasmania 3281 Parks & Wildlife Service history, which indicates that permanent 3282 habitation was 1899-1919 and 1948 on. 3283 3284 Changing affecting metadata only: 3285 3286 Macquarie Island is politically part of Australia, not Antarctica. 3287 (Thanks to Tobias Conradi.) 3288 3289 Sort Macquarie more-consistently with other parts of Australia. 3290 (Thanks to Tim Parenti.) 3291 3292 3293 Release 2013b - 2013-03-10 22:33:40 -0700 3294 3295 Changes affecting current and future timestamps: 3296 3297 Haiti uses US daylight-saving rules this year, and presumably future years. 3298 This changes timestamps starting today. (Thanks to Steffen Thorsen.) 3299 3300 Paraguay will end DST on March 24 this year. 3301 (Thanks to Steffen Thorsen.) For now, assume it's just this year. 3302 3303 Morocco does not observe DST during Ramadan; 3304 try to predict Ramadan in Morocco as best we can. 3305 (Thanks to Erik Homoet for the heads-up.) 3306 3307 Changes affecting commentary: 3308 3309 Update URLs in tz-link page. Add URLs for webOS, BB10, iOS. 3310 Update URL for Solaris. Mention Internet RFC 6557. 3311 Update Internet RFCs 2445->5545, 2822->5322. 3312 Switch from FTP to HTTP for Internet RFCs. 3313 3314 3315 Release 2013a - 2013-02-27 09:20:35 -0800 3316 3317 Change affecting binary data format: 3318 3319 The zone offset at the end of version-2-format zone files is now 3320 allowed to be 24:00, as per POSIX.1-2008. (Thanks to Arthur David Olson.) 3321 3322 Changes affecting current and future timestamps: 3323 3324 Chile's 2013 rules, and we guess rules for 2014 and later, will be 3325 the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC. 3326 (Thanks to Steffen Thorsen and Robert Elz.) 3327 3328 New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen. 3329 (Thanks to Tobias Conradi and Arthur David Olson.) 3330 3331 Many changes affect historical timestamps before 1940. 3332 These were deduced from: Milne J. Civil time. Geogr J. 1899 3333 Feb;13(2):173-94 <https://www.jstor.org/stable/1774359>. 3334 3335 Changes affecting the code: 3336 3337 Fix zic bug that mishandled Egypt's 2010 changes (this also affected 3338 the data). (Thanks to Arthur David Olson.) 3339 3340 Fix localtime bug when time_t is unsigned and data files were generated 3341 by a signed time_t system. (Thanks to Doug Bailey for reporting and 3342 to Arthur David Olson for fixing.) 3343 3344 Allow the email address for bug reports to be set by the packager. 3345 The default is tz (a] iana.org, as before. (Thanks to Joseph S. Myers.) 3346 3347 Update HTML checking to be compatible with Ubuntu 12.10. 3348 3349 Check that files are a safe subset of ASCII. At some point we may 3350 relax this requirement to a safe subset of UTF-8. Without the 3351 check, some non-UTF-8 encodings were leaking into the distribution. 3352 3353 Commentary changes: 3354 3355 Restore a comment about copyright notices that was inadvertently deleted. 3356 (Thanks to Arthur David Olson.) 3357 3358 Improve the commentary about which districts observe what times 3359 in Russia. (Thanks to Oscar van Vlijmen and Arthur David Olson.) 3360 3361 Add web page links to tz.js. 3362 3363 Add "Run by the Monkeys" to tz-art. (Thanks to Arthur David Olson.) 3364 3365 3366 Release 2012j - 2012-11-12 18:34:49 -0800 3367 3368 Libya moved to CET this weekend, but with DST planned next year. 3369 (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.) 3370 3371 Signatures now have the extension .asc, not .sign, as that's more 3372 standard. (Thanks to Phil Pennock.) 3373 3374 The output of 'zdump --version', and of 'zic --version', now 3375 uses a format that is more typical for --version. 3376 (Thanks to Joseph S. Myers.) 3377 3378 The output of 'tzselect --help', 'zdump --help', and 'zic --help' 3379 now uses tz (a] iana.org rather than the old elsie address. 3380 3381 zic -v now complains about abbreviations that are less than 3 3382 or more than 6 characters, as per Posix. Formerly, it checked 3383 for abbreviations that were more than 3. 3384 3385 'make public' no longer puts its temporary directory under /tmp, 3386 and uses the just-built zic rather than the system zic. 3387 3388 Various fixes to documentation and commentary. 3389 3390 3391 Release 2012i - 2012-11-03 12:57:09 -0700 3392 3393 Cuba switches from DST tomorrow at 01:00. (Thanks to Steffen Thorsen.) 3394 3395 Linker flags can now be specified via LDFLAGS. 3396 AWK now defaults to 'awk', not 'nawk'. 3397 The shell in tzselect now defaults to /bin/bash, but this can 3398 be overridden by specifying KSHELL. 3399 The main web page now mentions the unofficial GitHub repository. 3400 (Thanks to Mike Frysinger.) 3401 3402 Tarball signatures can now be built by running 'make signatures'. 3403 There are also new makefile rules 'tarballs', 'check_public', and 3404 separate makefile rules for each tarball and signature file. 3405 A few makefile rules are now more portable to strict POSIX. 3406 3407 The main web page now lists the canonical IANA URL. 3408 3409 3410 Release 2012h - 2012-10-26 22:49:10 -0700 3411 3412 Bahia no longer has DST. (Thanks to Kelley Cook.) 3413 3414 Tocantins has DST. (Thanks to Rodrigo Severo.) 3415 3416 Israel has new DST rules next year. (Thanks to Ephraim Silverberg.) 3417 3418 Jordan stays on DST this winter. (Thanks to Steffen Thorsen.) 3419 3420 Web page updates. 3421 3422 More C modernization, except that at Arthur David Olson's suggestion 3423 the instances of 'register' were kept. 3424 3425 3426 Release 2012g - 2012-10-17 20:59:45 -0700 3427 3428 Samoa fall 2012 and later. (Thanks to Nicholas Pereira and Robert Elz.) 3429 3430 Palestine fall 2012. (Thanks to Steffen Thorsen.) 3431 3432 Assume C89. 3433 3434 To attack the version-number problem, this release ships the file 3435 'Makefile' (which contains the release number) in both the tzcode and 3436 the tzdata tarballs. The two Makefiles are identical, and should be 3437 identical in any matching pair of tarballs, so it shouldn't matter 3438 which order you extract the tarballs. Perhaps we can come up with a 3439 better version-number scheme at some point; this scheme does have the 3440 virtue of not adding more files. 3441 3442 3443 Release 2012f - 2012-09-12 23:17:03 -0700 3444 3445 * australasia (Pacific/Fiji): Fiji DST is October 21 through January 3446 20 this year. (Thanks to Steffen Thorsen.) 3447 3448 3449 Release 2012e - 2012-08-02 20:44:55 -0700 3450 3451 * australasia (Pacific/Fakaofo): Tokelau is UT +13, not +14. 3452 (Thanks to Steffen Thorsen.) 3453 3454 * Use a single version number for both code and data. 3455 3456 * .gitignore: New file. 3457 3458 * Remove trailing white space. 3459 3460 3461 Release code2012c-data2012d - 2012-07-19 16:35:33 -0700 3462 3463 Changes for Morocco's timestamps, which take effect in a couple of 3464 hours, along with infrastructure changes to accommodate how the tz 3465 code and data are released on IANA. 3466 3467 3468 Release data2012c - 2012-03-27 12:17:25 -0400 3469 3470 africa 3471 Summer time changes for Morocco (to start late April 2012) 3472 3473 asia 3474 Changes for 2012 for Gaza & the West Bank (Hebron) and Syria 3475 3476 northamerica 3477 Haiti following US/Canada rules for 2012 (and we're assuming, 3478 for now anyway, for the future). 3479 3480 3481 Release 2012b - 2012-03-02 12:29:15 +0700 3482 3483 There is just one change to tzcode2012b (compared with 2012a): 3484 the Makefile that was accidentally included with 2012a has been 3485 replaced with the version that should have been there, which is 3486 identical with the previous version (from tzcode2011i). 3487 3488 There are just two changes in tzdata2012b compared with 2012a. 3489 3490 Most significantly, summer time in Cuba has been delayed 3 weeks 3491 (now starts April 1 rather than March 11). Since Mar 11 (the old start 3492 date, as listed in 2012a) is just a little over a week away, this 3493 change is urgent. 3494 3495 Less importantly, an excess tab in one of the changes in zone.tab 3496 in 2012a has been removed. 3497 3498 3499 Release 2012a - 2012-03-01 18:28:10 +0700 3500 3501 The changes in tzcode2012a (compared to the previous version, 2011i) 3502 are entirely to the README and tz-art.htm and tz-link.htm files, if 3503 none of those concern you, you can ignore the code update. The changes 3504 reflect the changed addresses for the mailing list and the code and 3505 data distribution points & methods (and a link to DateTime::TimeZone::Tzfile 3506 has been added to tz-link.htm). 3507 3508 In tzdata2012a (compared to the previous release, which was 2011n) 3509 the major changes are: 3510 Chile 2011/2012 and 2012/2013 summer time date adjustments. 3511 Falkland Islands onto permanent summer time (we're assuming for the 3512 foreseeable future, though 2012 is all we're fairly certain of.) 3513 Armenia has abolished Summer Time. 3514 Tokelau jumped the International Date Line back last December 3515 (just the same as their near neighbour, Samoa). 3516 America/Creston is a new zone for a small area of British Columbia 3517 There will be a leapsecond 2012-06-30 23:59:60 UTC. 3518 3519 Other minor changes are: 3520 Corrections to 1918 Canadian summer time end dates. 3521 Updated URL for UK time zone history (in comments) 3522 A few typos in Le Corre's list of free French place names (comments) 3523 3524 3525 Release data2011n - 2011-10-30 14:57:54 +0700 3526 3527 There are three changes of note - most urgently, Cuba (America/Havana) 3528 has extended summer time by two weeks, now to end on Nov 13, rather than 3529 the (already past) Oct 30. Second, the Pridnestrovian Moldavian Republic 3530 (Europe/Tiraspol) decided not to split from the rest of Moldova after 3531 all, and consequently that zone has been removed (again) and reinstated 3532 in the "backward" file as a link to Europe/Chisinau. And third, the 3533 end date for Fiji's summer time this summer was moved forward from the 3534 earlier planned Feb 26, to Jan 22. 3535 3536 Apart from that, Moldova (MD) returns to a single entry in zone.tab 3537 (and the incorrect syntax that was in the 2011m version of that file 3538 is so fixed - it would have been fixed in a different way had this 3539 change not happened - that's the "missing" sccs version id). 3540 3541 3542 Release data2011m - 2011-10-24 21:42:16 +0700 3543 3544 In particular, the typos in comments in the data (2011-11-17 should have 3545 been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that 3546 Tim Parenti noted) have been fixed, and the change for Ukraine has been 3547 made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to 3548 Tim Parenti, and also Denys Gavrysh) 3549 3550 In addition, I added Europe/Tiraspol to zone.tab. 3551 3552 This time, all the files have new version numbers... (including the files 3553 otherwise unchanged in 2011m that were changed in 2011l but didn't get new 3554 version numbers there...) 3555 3556 3557 Release data2011l - 2011-10-10 11:15:43 +0700 3558 3559 There are just 2 changes that cause different generated tzdata files from 3560 zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil 3561 is included, but commented out. Compared with the diff I sent out last week, 3562 this version also includes attributions for the sources for the changes 3563 (in much the same format as ado used, but the html tags have not been 3564 checked, verified, or used in any way at all, so if there are errors there, 3565 please let me know.) 3566 3567 3568 Release data2011k - 2011-09-20 17:54:03 -0400 3569 3570 [not summarized] 3571 3572 3573 Release data2011j - 2011-09-12 09:22:49 -0400 3574 3575 (contemporary changes for Samoa; past changes for Kenya, Uganda, and 3576 Tanzania); there are also two spelling corrections to comments in 3577 the australasia file (with thanks to Christos Zoulas). 3578 3579 3580 Release 2011i - 2011-08-29 05:56:32 -0400 3581 3582 [not summarized] 3583 3584 3585 Release data2011h - 2011-06-15 18:41:48 -0400 3586 3587 Russia and Curaao changes 3588 3589 3590 Release 2011g - 2011-04-25 09:07:22 -0400 3591 3592 update the rules for Egypt to reflect its abandonment of DST this year 3593 3594 3595 Release 2011f - 2011-04-06 17:14:53 -0400 3596 3597 [not summarized] 3598 3599 3600 Release 2011e - 2011-03-31 16:04:38 -0400 3601 3602 Morocco, Chile, and tz-link changes 3603 3604 3605 Release 2011d - 2011-03-14 09:18:01 -0400 3606 3607 changes that impact present-day timestamps in Cuba, Samoa, and Turkey 3608 3609 3610 Release 2011c - 2011-03-07 09:30:09 -0500 3611 3612 These do affect current timestamps in Chile and Annette Island, Canada. 3613 3614 3615 Release 2011b - 2011-02-07 08:44:50 -0500 3616 3617 [not summarized] 3618 3619 3620 Release 2011a - 2011-01-24 10:30:16 -0500 3621 3622 [not summarized] 3623 3624 3625 Release data2010o - 2010-11-01 09:18:23 -0400 3626 3627 change to the end of DST in Fiji in 2011 3628 3629 3630 Release 2010n - 2010-10-25 08:19:17 -0400 3631 3632 [not summarized] 3633 3634 3635 Release 2010m - 2010-09-27 09:24:48 -0400 3636 3637 Hong Kong, Vostok, and zic.c changes 3638 3639 3640 Release 2010l - 2010-08-16 06:57:25 -0400 3641 3642 [not summarized] 3643 3644 3645 Release 2010k - 2010-07-26 10:42:27 -0400 3646 3647 [not summarized] 3648 3649 3650 Release 2010j - 2010-05-10 09:07:48 -0400 3651 3652 changes for Baha de Banderas and for version naming 3653 3654 3655 Release data2010i - 2010-04-16 18:50:45 -0400 3656 3657 the end of DST in Morocco on 2010-08-08 3658 3659 3660 Release data2010h - 2010-04-05 09:58:56 -0400 3661 3662 [not summarized] 3663 3664 3665 Release data2010g - 2010-03-24 11:14:53 -0400 3666 3667 [not summarized] 3668 3669 3670 Release 2010f - 2010-03-22 09:45:46 -0400 3671 3672 [not summarized] 3673 3674 3675 Release data2010e - 2010-03-08 14:24:27 -0500 3676 3677 corrects the Dhaka bug found by Danvin Ruangchan 3678 3679 3680 Release data2010d - 2010-03-06 07:26:01 -0500 3681 3682 [not summarized] 3683 3684 3685 Release 2010c - 2010-03-01 09:20:58 -0500 3686 3687 changes including KRE's suggestion for earlier initialization of 3688 "goahead" and "goback" structure elements 3689 3690 3691 Release code2010a - 2010-02-16 10:40:04 -0500 3692 3693 [not summarized] 3694 3695 3696 Release data2010b - 2010-01-20 12:37:01 -0500 3697 3698 Mexico changes 3699 3700 3701 Release data2010a - 2010-01-18 08:30:04 -0500 3702 3703 changes to Dhaka 3704 3705 3706 Release data2009u - 2009-12-26 08:32:28 -0500 3707 3708 changes to DST in Bangladesh 3709 3710 3711 Release 2009t - 2009-12-21 13:24:27 -0500 3712 3713 [not summarized] 3714 3715 3716 Release data2009s - 2009-11-14 10:26:32 -0500 3717 3718 (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change 3719 3720 3721 Release 2009r - 2009-11-09 10:10:31 -0500 3722 3723 "antarctica" and "tz-link.htm" changes 3724 3725 3726 Release 2009q - 2009-11-02 09:12:40 -0500 3727 3728 with two corrections as reported by Eric Muller and Philip Newton 3729 3730 3731 Release data2009p - 2009-10-23 15:05:27 -0400 3732 3733 Argentina (including San Luis) changes (with the correction from 3734 Mariano Absatz) 3735 3736 3737 Release data2009o - 2009-10-14 16:49:38 -0400 3738 3739 Samoa (commentary only), Pakistan, and Bangladesh changes 3740 3741 3742 Release data2009n - 2009-09-22 15:13:38 -0400 3743 3744 added commentary for Argentina and a change to the end of DST in 3745 2009 in Pakistan 3746 3747 3748 Release data2009m - 2009-09-03 10:23:43 -0400 3749 3750 Samoa and Palestine changes 3751 3752 3753 Release data2009l - 2009-08-14 09:13:07 -0400 3754 3755 Samoa (comments only) and Egypt 3756 3757 3758 Release 2009k - 2009-07-20 09:46:08 -0400 3759 3760 [not summarized] 3761 3762 3763 Release data2009j - 2009-06-15 06:43:59 -0400 3764 3765 Bangladesh change (with a short turnaround since the DST change is 3766 impending) 3767 3768 3769 Release 2009i - 2009-06-08 09:21:22 -0400 3770 3771 updating for DST in Bangladesh this year 3772 3773 3774 Release 2009h - 2009-05-26 09:19:14 -0400 3775 3776 [not summarized] 3777 3778 3779 Release data2009g - 2009-04-20 16:34:07 -0400 3780 3781 Cairo 3782 3783 3784 Release data2009f - 2009-04-10 11:00:52 -0400 3785 3786 correct DST in Pakistan 3787 3788 3789 Release 2009e - 2009-04-06 09:08:11 -0400 3790 3791 [not summarized] 3792 3793 3794 Release 2009d - 2009-03-23 09:38:12 -0400 3795 3796 Morocco, Tunisia, Argentina, and American Astronomical Society changes 3797 3798 3799 Release data2009c - 2009-03-16 09:47:51 -0400 3800 3801 change to the start of Cuban DST 3802 3803 3804 Release 2009b - 2009-02-09 11:15:22 -0500 3805 3806 [not summarized] 3807 3808 3809 Release 2009a - 2009-01-21 10:09:39 -0500 3810 3811 [not summarized] 3812 3813 3814 Release data2008i - 2008-10-21 12:10:25 -0400 3815 3816 southamerica and zone.tab files, with Argentina DST rule changes and 3817 United States zone reordering and recommenting 3818 3819 3820 Release 2008h - 2008-10-13 07:33:56 -0400 3821 3822 [not summarized] 3823 3824 3825 Release 2008g - 2008-10-06 09:03:18 -0400 3826 3827 Fix a broken HTML anchor and update Brazil's DST transitions; 3828 there's also a slight reordering of information in tz-art.htm. 3829 3830 3831 Release data2008f - 2008-09-09 22:33:26 -0400 3832 3833 [not summarized] 3834 3835 3836 Release 2008e - 2008-07-28 14:11:17 -0400 3837 3838 changes by Arthur David Olson and Jesper Nrgaard Welen 3839 3840 3841 Release data2008d - 2008-07-07 09:51:38 -0400 3842 3843 changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo 3844 3845 3846 Release data2008c - 2008-05-19 17:48:03 -0400 3847 3848 Pakistan, Morocco, and Mongolia 3849 3850 3851 Release data2008b - 2008-03-24 08:30:59 -0400 3852 3853 including renaming Asia/Calcutta to Asia/Kolkata, with a backward 3854 link provided 3855 3856 3857 Release 2008a - 2008-03-08 05:42:16 -0500 3858 3859 [not summarized] 3860 3861 3862 Release 2007k - 2007-12-31 10:25:22 -0500 3863 3864 most importantly, changes to the "southamerica" file based on 3865 Argentina's readoption of daylight saving time 3866 3867 3868 Release 2007j - 2007-12-03 09:51:01 -0500 3869 3870 1. eliminate the "P" (parameter) macro; 3871 3872 2. the "noncontroversial" changes circulated on the time zone 3873 mailing list (less the changes to "logwtmp.c"); 3874 3875 3. eliminate "too many transition" errors when "min" is used in time 3876 zone rules; 3877 3878 4. changes by Paul Eggert (including updated information for Venezuela). 3879 3880 3881 Release data2007i - 2007-10-30 10:28:11 -0400 3882 3883 changes for Cuba and Syria 3884 3885 3886 Release 2007h - 2007-10-01 10:05:51 -0400 3887 3888 changes by Paul Eggert, as well as an updated link to the ICU 3889 project in tz-link.htm 3890 3891 3892 Release 2007g - 2007-08-20 10:47:59 -0400 3893 3894 changes by Paul Eggert 3895 3896 The "leapseconds" file has been updated to incorporate the most 3897 recent International Earth Rotation and Reference Systems Service 3898 (IERS) bulletin. 3899 3900 There's an addition to tz-art.htm regarding the television show "Medium". 3901 3902 3903 Release 2007f - 2007-05-07 10:46:46 -0400 3904 3905 changes by Paul Eggert (including Haiti, Turks and Caicos, and New 3906 Zealand) 3907 3908 changes to zic.c to allow hour values greater than 24 (along with 3909 Paul's improved time value overflow checking) 3910 3911 3912 Release 2007e - 2007-04-02 10:11:52 -0400 3913 3914 Syria and Honduras changes by Paul Eggert 3915 3916 zic.c variable renaming changes by Arthur David Olson 3917 3918 3919 Release 2007d - 2007-03-20 08:48:30 -0400 3920 3921 changes by Paul Eggert 3922 3923 the elimination of white space at the ends of lines 3924 3925 3926 Release 2007c - 2007-02-26 09:09:37 -0500 3927 3928 changes by Paul Eggert 3929 3930 3931 Release 2007b - 2007-02-12 09:34:20 -0500 3932 3933 Paul Eggert's proposed change to the quotation handling logic in zic.c. 3934 3935 changes to the commentary in "leapseconds" reflecting the IERS 3936 announcement that there is to be no positive leap second at the end 3937 of June 2007. 3938 3939 3940 Release 2007a - 2007-01-08 12:28:29 -0500 3941 3942 changes by Paul Eggert 3943 3944 Derick Rethan's Asmara change 3945 3946 Oscar van Vlijmen's Easter Island local mean time change 3947 3948 symbolic link changes 3949 3950 3951 Release 2006p - 2006-11-27 08:54:27 -0500 3952 3953 changes by Paul Eggert 3954 3955 3956 Release 2006o - 2006-11-06 09:18:07 -0500 3957 3958 changes by Paul Eggert 3959 3960 3961 Release 2006n - 2006-10-10 11:32:06 -0400 3962 3963 changes by Paul Eggert 3964 3965 3966 Release 2006m - 2006-10-02 15:32:35 -0400 3967 3968 changes for Uruguay, Palestine, and Egypt by Paul Eggert 3969 3970 (minimalist) changes to zic.8 to clarify "until" information 3971 3972 3973 Release data2006l - 2006-09-18 12:58:11 -0400 3974 3975 Paul's best-effort work on this coming weekend's Egypt time change 3976 3977 3978 Release 2006k - 2006-08-28 12:19:09 -0400 3979 3980 changes by Paul Eggert 3981 3982 3983 Release 2006j - 2006-08-21 09:56:32 -0400 3984 3985 changes by Paul Eggert 3986 3987 3988 Release code2006i - 2006-08-07 12:30:55 -0400 3989 3990 localtime.c fixes 3991 3992 Ken Pizzini's conversion script 3993 3994 3995 Release code2006h - 2006-07-24 09:19:37 -0400 3996 3997 adds public domain notices to four files 3998 3999 includes a fix for transition times being off by a second 4000 4001 adds a new recording to the "arts" file (information courtesy Colin Bowern) 4002 4003 4004 Release 2006g - 2006-05-08 17:18:09 -0400 4005 4006 northamerica changes by Paul Eggert 4007 4008 4009 Release 2006f - 2006-05-01 11:46:00 -0400 4010 4011 a missing version number problem is fixed (with thanks to Bradley 4012 White for catching the problem) 4013 4014 4015 Release 2006d - 2006-04-17 14:33:43 -0400 4016 4017 changes by Paul Eggert 4018 4019 added new items to tz-arts.htm that were found by Paul 4020 4021 4022 Release 2006c - 2006-04-03 10:09:32 -0400 4023 4024 two sets of data changes by Paul Eggert 4025 4026 a fencepost error fix in zic.c 4027 4028 changes to zic.c and the "europe" file to minimize differences 4029 between output produced by the old 32-bit zic and the new 64-bit 4030 version 4031 4032 4033 Release 2006b - 2006-02-20 10:08:18 -0500 4034 [tz32code2006b + tz64code2006b + tzdata2006b] 4035 4036 64-bit code 4037 4038 All SCCS IDs were bumped to "8.1" for this release. 4039 4040 4041 Release 2006a - 2006-01-30 08:59:31 -0500 4042 4043 changes by Paul Eggert (in particular, Indiana time zone moves) 4044 4045 an addition to the zic manual page to describe how special-case 4046 transitions are handled 4047 4048 4049 Release 2005r - 2005-12-27 09:27:13 -0500 4050 4051 Canadian changes by Paul Eggert 4052 4053 They also add "<pre>" directives to time zone data files and reflect 4054 changes to warning message logic in "zdump.c" (but with calls to 4055 "gettext" kept unbundled at the suggestion of Ken Pizzini). 4056 4057 4058 Release 2005q - 2005-12-13 09:17:09 -0500 4059 4060 Nothing earth-shaking here: 4061 1. Electronic mail addresses have been removed. 4062 2. Casts of the return value of exit have been removed. 4063 3. Casts of the argument of is.* macros have been added. 4064 4. Indentation in one section of zic.c has been fixed. 4065 5. References to dead URLs in the data files have been dealt with. 4066 4067 4068 Release 2005p - 2005-12-05 10:30:53 -0500 4069 4070 "systemv", "tz-link.htm", and "zdump.c" changes 4071 (less the casts of arguments to the is* macros) 4072 4073 4074 Release 2005o - 2005-11-28 10:55:26 -0500 4075 4076 Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert 4077 4078 zdump.c lint fixes by Arthur David Olson 4079 4080 4081 Release 2005n - 2005-10-03 09:44:09 -0400 4082 4083 changes by Paul Eggert (both the Uruguay changes and the Kyrgyzstan 4084 et al. changes) 4085 4086 4087 Release 2005m - 2005-08-29 12:15:40 -0400 4088 4089 changes by Paul Eggert (with a small tweak to the tz-art change) 4090 4091 a declaration of an unused variable has been removed from zdump.c 4092 4093 4094 Release 2005l - 2005-08-22 12:06:39 -0400 4095 4096 changes by Paul Eggert 4097 4098 overflow/underflow checks by Arthur David Olson, minus changes to 4099 the "Theory" file about the pending addition of 64-bit data (I grow 4100 less confident of the changes being accepted with each passing day, 4101 and the changes no longer increase the data files nine-fold--there's 4102 less than a doubling in size by my local Sun's reckoning) 4103 4104 4105 Release 2005k - 2005-07-14 14:14:24 -0400 4106 4107 The "leapseconds" file has been edited to reflect the recently 4108 announced leap second at the end of 2005. 4109 4110 I've also deleted electronic mail addresses from the files as an 4111 anti-spam measure. 4112 4113 4114 Release 2005j - 2005-06-13 14:34:13 -0400 4115 4116 These reflect changes to limit the length of time zone abbreviations 4117 and the characters used in those abbreviations. 4118 4119 There are also changes to handle POSIX-style "quoted" timezone 4120 environment variables. 4121 4122 The changes were circulated on the time zone mailing list; the only 4123 change since then was the removal of a couple of minimum-length of 4124 abbreviation checks. 4125 4126 4127 Release data2005i - 2005-04-21 15:04:16 -0400 4128 4129 changes (most importantly to Nicaragua and Haiti) by Paul Eggert 4130 4131 4132 Release 2005h - 2005-04-04 11:24:47 -0400 4133 4134 changes by Paul Eggert 4135 4136 minor changes to Makefile and zdump.c to produce more useful output 4137 when doing a "make typecheck" 4138 4139 4140 Release 2005g - 2005-03-14 10:11:21 -0500 4141 4142 changes by Paul Eggert (a change to current DST rules in Uruguay and 4143 an update to a link to time zone software) 4144 4145 4146 Release 2005f - 2005-03-01 08:45:32 -0500 4147 4148 data and documentation changes by Paul Eggert 4149 4150 4151 Release 2005e - 2005-02-10 15:59:44 -0500 4152 4153 [not summarized] 4154 4155 4156 Release code2005d - 2005-01-31 09:21:47 -0500 4157 4158 make zic complain about links to links if the -v flag is used 4159 4160 have "make public" do more code checking 4161 4162 add an include to "localtime.c" for the benefit of gcc systems 4163 4164 4165 Release 2005c - 2005-01-17 18:36:29 -0500 4166 4167 get better results when mktime runs on a system where time_t is double 4168 4169 changes to the data files (most importantly to Paraguay) 4170 4171 4172 Release 2005b - 2005-01-10 09:19:54 -0500 4173 4174 Get localtime and gmtime working on systems with exotic time_t types. 4175 4176 Update the leap second commentary in the "leapseconds" file. 4177 4178 4179 Release 2005a - 2005-01-01 13:13:44 -0500 4180 4181 [not summarized] 4182 4183 4184 Release code2004i - 2004-12-14 13:42:58 -0500 4185 4186 Deal with systems where time_t is unsigned. 4187 4188 4189 Release code2004h - 2004-12-07 11:40:18 -0500 4190 4191 64-bit-time_t changes 4192 4193 4194 Release 2004g - 2004-11-02 09:06:01 -0500 4195 4196 update to Cuba (taking effect this weekend) 4197 4198 other changes by Paul Eggert 4199 4200 correction of the spelling of Oslo 4201 4202 changed versions of difftime.c and private.h 4203 4204 4205 Release code2004f - 2004-10-21 10:25:22 -0400 4206 4207 Cope with wide-ranging tm_year values. 4208 4209 4210 Release 2004e - 2004-10-11 14:47:21 -0400 4211 4212 Brazil/Argentina/Israel changes by Paul Eggert 4213 4214 changes to tz-link.htm by Paul 4215 4216 one small fix to Makefile 4217 4218 4219 Release 2004d - 2004-09-22 08:27:29 -0400 4220 4221 Avoid overflow problems when TM_YEAR_BASE is added to an integer. 4222 4223 4224 Release 2004c - 2004-08-11 12:06:26 -0400 4225 4226 asctime-related changes 4227 4228 (variants of) some of the documentation changes suggested by Paul Eggert 4229 4230 4231 Release 2004b - 2004-07-19 14:33:35 -0400 4232 4233 data changes by Paul Eggert - most importantly, updates for Argentina 4234 4235 4236 Release 2004a - 2004-05-27 12:00:47 -0400 4237 4238 changes by Paul Eggert 4239 4240 Handle DST transitions that occur at the end of a month in some 4241 years but at the start of the following month in other years. 4242 4243 Add a copy of the correspondence that's the basis for claims about 4244 DST in the Navajo Nation. 4245 4246 4247 Release 2003e - 2003-12-15 09:36:47 -0500 4248 4249 changes by Arthur David Olson (primarily code changes) 4250 4251 changes by Paul Eggert (primarily data changes) 4252 4253 minor changes to "Makefile" and "northamerica" (in the latter case, 4254 optimization of the "Toronto" rules) 4255 4256 4257 Release 2003d - 2003-10-06 09:34:44 -0400 4258 4259 changes by Paul Eggert 4260 4261 4262 Release 2003c - 2003-09-16 10:47:05 -0400 4263 4264 Fix bad returns in zic.c's inleap function. 4265 Thanks to Bradley White for catching the problem! 4266 4267 4268 Release 2003b - 2003-09-16 07:13:44 -0400 4269 4270 Add a "--version" option (and documentation) to the zic and zdump commands. 4271 4272 changes to overflow/underflow checking in zic 4273 4274 a localtime typo fix. 4275 4276 Update the leapseconds and tz-art.htm files. 4277 4278 4279 Release 2003a - 2003-03-24 09:30:54 -0500 4280 4281 changes by Paul Eggert 4282 4283 a few additions and modifications to the tz-art.htm file 4284 4285 4286 Release 2002d - 2002-10-15 13:12:42 -0400 4287 4288 changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab 4289 4290 There's also a new time zone quote in "tz-art.htm". 4291 4292 4293 Release 2002c - 2002-04-04 11:55:20 -0500 4294 4295 changes by Paul Eggert 4296 4297 Change zic.c to avoid creating symlinks to files that don't exist. 4298 4299 4300 Release 2002b - 2002-01-28 12:56:03 -0500 4301 4302 [These change notes are for Release 2002a, which was corrupted. 4303 2002b was a corrected version of 2002a.] 4304 4305 changes by Paul Eggert 4306 4307 Update the "leapseconds" file to note that there'll be no leap 4308 second at the end of June, 2002. 4309 4310 Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone. 4311 4312 Change to "difftime.c" to avoid sizeof problems. 4313 4314 4315 Release 2001d - 2001-10-09 13:31:32 -0400 4316 4317 changes by Paul Eggert 4318 4319 4320 Release 2001c - 2001-06-05 13:59:55 -0400 4321 4322 changes by Paul Eggert and Andrew Brown 4323 4324 4325 Release 2001b - 2001-04-05 16:44:38 -0400 4326 4327 changes by Paul Eggert (modulo jnorgard's typo fix) 4328 4329 tz-art.htm has been HTMLified. 4330 4331 4332 Release 2001a - 2001-03-13 12:57:44 -0500 4333 4334 changes by Paul Eggert 4335 4336 An addition to the "leapseconds" file: comments with the text of the 4337 latest IERS leap second notice. 4338 4339 Trailing white space has been removed from data file lines, and 4340 repeated spaces in "Rule Jordan" lines in the "asia" file have been 4341 converted to tabs. 4342 4343 4344 Release 2000h - 2000-12-14 15:33:38 -0500 4345 4346 changes by Paul Eggert 4347 4348 one typo fix in the "art" file 4349 4350 With providence, this is the last update of the millennium. 4351 4352 4353 Release 2000g - 2000-10-10 11:35:22 -0400 4354 4355 changes by Paul Eggert 4356 4357 correction of John Mackin's name submitted by Robert Elz 4358 4359 Garry Shandling's Daylight Saving Time joke (!?!) from the recent 4360 Emmy Awards broadcast. 4361 4362 4363 Release 2000f - 2000-08-10 09:31:58 -0400 4364 4365 changes by Paul Eggert 4366 4367 Added information in "tz-art.htm" on a Seinfeld reference to DST. 4368 4369 Error checking and messages in the "yearistype" script have been 4370 improved. 4371 4372 4373 Release 2000e - 2000-07-31 09:27:54 -0400 4374 4375 data changes by Paul Eggert 4376 4377 a change to the default value of the defined constant HAVE_STRERROR 4378 4379 the addition of a Dave Barry quote on DST to the tz-arts file 4380 4381 4382 Release 2000d - 2000-04-20 15:43:04 -0400 4383 4384 changes to the documentation and code of strftime for C99 conformance 4385 4386 a bug fix for date.c 4387 4388 These are based on (though modified from) changes by Paul Eggert. 4389 4390 4391 Release 2000c - 2000-03-04 10:31:43 -0500 4392 4393 changes by Paul Eggert 4394 4395 4396 Release 2000b - 2000-02-21 12:16:29 -0500 4397 4398 changes by Paul Eggert and Joseph Myers 4399 4400 modest tweaks to the tz-art.htm and tz-link.htm files 4401 4402 4403 Release 2000a - 2000-01-18 09:21:26 -0500 4404 4405 changes by Paul Eggert 4406 4407 The two hypertext documents have also been renamed. 4408 4409 4410 Release code1999i-data1999j - 1999-11-15 18:43:22 -0500 4411 4412 Paul Eggert's changes 4413 4414 additions to the "zic" manual page and the "Arts.htm" file 4415 4416 4417 Release code1999h-data1999i - 1999-11-08 14:55:21 -0500 4418 4419 [not summarized] 4420 4421 4422 Release data1999h - 1999-10-07 03:50:29 -0400 4423 4424 changes by Paul Eggert to "europe" (most importantly, fixing 4425 Lithuania and Estonia) 4426 4427 4428 Release 1999g - 1999-09-28 11:06:18 -0400 4429 4430 data changes by Paul Eggert (most importantly, the change for 4431 Lebanon that buys correctness for this coming Sunday) 4432 4433 The "code" file contains changes to "Makefile" and "checktab.awk" to 4434 allow better checking of time zone files before they are published. 4435 4436 4437 Release 1999f - 1999-09-23 09:48:14 -0400 4438 4439 changes by Arthur David Olson and Paul Eggert 4440 4441 4442 Release 1999e - 1999-08-17 15:20:54 -0400 4443 4444 changes circulated by Paul Eggert, although the change to handling 4445 of DST-specifying timezone names has been commented out for now 4446 (search for "XXX" in "localtime.c" for details). These files also 4447 do not make any changes to the start of DST in Brazil. 4448 4449 In addition to Paul's changes, there are updates to "Arts.htm" and 4450 cleanups of URLs. 4451 4452 4453 Release 1999d - 1999-03-30 11:31:07 -0500 4454 4455 changes by Paul Eggert 4456 4457 The Makefile's "make public" rule has also been changed to do a test 4458 compile of each individual time zone data file (which should help 4459 avoid problems such as the one we had with Nicosia). 4460 4461 4462 Release 1999c - 1999-03-25 09:47:47 -0500 4463 4464 changes by Paul Eggert, most importantly the change for Chile. 4465 4466 4467 Release 1999b - 1999-02-01 17:51:44 -0500 4468 4469 changes by Paul Eggert 4470 4471 code changes (suggested by Mani Varadarajan, mani at be.com) for 4472 correct handling of symbolic links when building using a relative directory 4473 4474 code changes to generate correct messages for failed links 4475 4476 updates to the URLs in Arts.htm 4477 4478 4479 Release 1999a - 1999-01-19 16:20:29 -0500 4480 4481 error message internationalizations and corrections in zic.c and 4482 zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz, 4483 to whom thanks!) 4484 4485 4486 Release code1998h-data1998i - 1998-10-01 09:56:10 -0400 4487 4488 changes for Brazil, Chile, and Germany 4489 4490 support for use of "24:00" in the input files for the time zone compiler 4491 4492 4493 Release code1998g-data1998h - 1998-09-24 10:50:28 -0400 4494 4495 changes by Paul Eggert 4496 4497 correction to a define in the "private.h" file 4498 4499 4500 Release data1998g - 1998-08-11 03:28:35 -0000 4501 [tzdata1998g.tar.gz is missing!] 4502 4503 Lithuanian change provided by mgedmin at pub.osf.it 4504 4505 Move creation of the GMT link with Etc/GMT to "etcetera" (from 4506 "backward") to ensure that the GMT file is created even where folks 4507 don't want the "backward" links (as suggested by Paul Eggert). 4508 4509 4510 Release data1998f - 1998-07-20 13:50:00 -0000 4511 [tzdata1998f.tar.gz is missing!] 4512 4513 Update the "leapseconds" file to include the newly-announced 4514 insertion at the end of 1998. 4515 4516 4517 Release code1998f - 1998-06-01 10:18:31 -0400 4518 4519 addition to localtime.c by Guy Harris 4520 4521 4522 Release 1998e - 1998-05-28 09:56:26 -0400 4523 4524 The Makefile is changed to produce zoneinfo-posix rather than 4525 zoneinfo/posix, and to produce zoneinfo-leaps rather than 4526 zoneinfo/right. 4527 4528 data changes by Paul Eggert 4529 4530 changes from Guy Harris to provide asctime_r and ctime_r 4531 4532 A usno1998 file (substantially identical to usno1997) has been added. 4533 4534 4535 Release 1998d - 1998-05-14 11:58:34 -0400 4536 4537 changes to comments (in particular, elimination of references to CIA maps). 4538 "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places 4539 where changes occur. 4540 4541 4542 Release 1998c - 1998-02-28 12:32:26 -0500 4543 4544 changes by Paul Eggert (save the "French correction," on which I'll 4545 wait for the dust to settle) 4546 4547 symlink changes 4548 4549 changes and additions to Arts.htm 4550 4551 4552 Release 1998b - 1998-01-17 14:31:51 -0500 4553 4554 URL cleanups and additions 4555 4556 4557 Release 1998a - 1998-01-13 12:37:35 -0500 4558 4559 changes by Paul Eggert 4560 4561 4562 Release code1997i-data1997k - 1997-12-29 09:53:41 -0500 4563 4564 changes by Paul Eggert, with minor modifications from Arthur David 4565 Olson to make the files more browser friendly 4566 4567 4568 Release code1997h-data1997j - 1997-12-18 17:47:35 -0500 4569 4570 minor changes to put "TZif" at the start of each timezone information file 4571 4572 a rule has also been added to the Makefile so you can 4573 make zones 4574 to just recompile the zone information files (rather than doing a 4575 full "make install" with its other effects). 4576 4577 4578 Release data1997i - 1997-10-07 08:45:38 -0400 4579 4580 changes to Africa by Paul Eggert 4581 4582 4583 Release code1997g-data1997h - 1997-09-04 16:56:54 -0400 4584 4585 corrections for Uruguay (and other locations) 4586 4587 Arthur David Olson's simple-minded fix allowing mktime to both 4588 correctly handle leap seconds and correctly handle tm_sec values 4589 upon which arithmetic has been performed. 4590 4591 4592 Release code1997f-data1997g - 1997-07-19 13:15:02 -0400 4593 4594 Paul Eggert's updates 4595 4596 a small change to a function prototype; 4597 4598 "Music" has been renamed "Arts.htm", HTMLified, and augmented to 4599 include information on Around the World in Eighty Days. 4600 4601 4602 Release code1997e-data1997f - 1997-05-03 18:52:34 -0400 4603 4604 fixes to zic's error handling 4605 4606 changes inspired by the item circulated on Slovenia 4607 4608 The description of Web resources has been HTMLified for browsing 4609 convenience. 4610 4611 A new piece of tz-related music has been added to the "Music" file. 4612 4613 4614 Release code1997d-data1997e - 1997-03-29 12:48:52 -0500 4615 4616 Paul Eggert's latest suggestions 4617 4618 4619 Release code1997c-data1997d - 1997-03-07 20:37:54 -0500 4620 4621 changes to "zic.c" to correct performance of the "-s" option 4622 4623 a new file "usno1997" 4624 4625 4626 Release data1997c - 1997-03-04 09:58:18 -0500 4627 4628 changes in Israel 4629 4630 4631 Release 1997b - 1997-02-27 18:34:19 -0500 4632 4633 The data file incorporates the 1997 leap second. 4634 4635 The code file incorporates Arthur David Olson's take on the 4636 zic/multiprocessor/directory-creation situation. 4637 4638 4639 Release 1997a - 1997-01-21 09:11:10 -0500 4640 4641 Paul Eggert's Antarctica (and other changes) 4642 4643 Arthur David Olson finessed the "getopt" issue by checking against 4644 both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1 4645 is returned while SunOS 5.5's manual says EOF is returned). 4646 4647 4648 Release code1996o-data1996n - 1996-12-27 21:42:05 -0500 4649 4650 Paul Eggert's latest changes 4651 4652 4653 Release code1996n - 1996-12-16 09:42:02 -0500 4654 4655 link snapping fix from Bruce Evans (via Garrett Wollman) 4656 4657 4658 Release data1996m - 1996-11-24 02:37:34 -0000 4659 [tzdata1996m.tar.gz is missing!] 4660 4661 Paul Eggert's batch of changes 4662 4663 4664 Release code1996m-data1996l - 1996-11-05 14:00:12 -0500 4665 4666 No functional changes here; the files have simply been changed to 4667 make more use of ISO style dates in comments. The names of the above 4668 files now include the year in full. 4669 4670 4671 Release code96l - 1996-09-08 17:12:20 -0400 4672 4673 tzcode96k was missing a couple of pieces. 4674 4675 4676 Release 96k - 1996-09-08 16:06:22 -0400 4677 4678 the latest round of changes from Paul Eggert 4679 4680 the recent Year 2000 material 4681 4682 4683 Release code96j - 1996-07-30 13:18:53 -0400 4684 4685 Set sp->typecnt as suggested by Timothy Patrick Murphy. 4686 4687 4688 Release code96i - 1996-07-27 20:11:35 -0400 4689 4690 Paul's suggested patch for strftime %V week numbers 4691 4692 4693 Release data96i - 1996-07-01 18:13:04 -0400 4694 4695 "northamerica" and "europe" changes by Paul Eggert 4696 4697 4698 Release code96h - 1996-06-05 08:02:21 -0400 4699 4700 fix for handling transitions specified in Universal Time 4701 4702 Some "public domain" notices have also been added. 4703 4704 4705 Release code96g - 1996-05-16 14:00:26 -0400 4706 4707 fix for the simultaneous-DST-and-zone-change challenge 4708 4709 4710 Release data96h - 1996-05-09 17:40:51 -0400 4711 4712 changes by Paul Eggert 4713 4714 4715 Release code96f-data96g - 1996-05-03 03:09:59 -0000 4716 [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!] 4717 4718 The changes get us some of the way to fixing the problems noted in Paul 4719 Eggert's letter yesterday (in addition to a few others). The approach 4720 has been to make zic a bit smarter about figuring out what time zone 4721 abbreviations apply just after the time specified in the "UNTIL" part 4722 of a zone line. Putting the smarts in zic means avoiding having 4723 transition times show up in both "Zone" lines and "Rule" lines, which 4724 in turn avoids multiple transition time entries in time zone files. 4725 (This also makes the zic input files such as "europe" a bit shorter and 4726 should ease maintenance.) 4727 4728 4729 Release data96f - 1996-04-19 19:20:03 -0000 4730 [tzdata96f.tar.gz is missing!] 4731 4732 The only changes are to the "northamerica" file; the time zone 4733 abbreviation for Denver is corrected to MST (and MDT), and the 4734 comments for Mexico have been updated. 4735 4736 4737 Release data96e - 1996-03-19 17:37:26 -0500 4738 4739 Proposals by Paul Eggert, in particular the Portugal change that 4740 comes into play at the end of this month. 4741 4742 4743 Release data96d - 1996-03-18 20:49:39 -0500 4744 4745 [not summarized] 4746 4747 4748 Release code96e - 1996-02-29 15:43:27 -0000 4749 [tzcode96e.tar.gz is missing!] 4750 4751 internationalization changes and the fix to the documentation for strftime 4752 4753 4754 Release code96d-data96c - 1996-02-12 11:05:27 -0500 4755 4756 The "code" file simply updates Bob Kridle's electronic address. 4757 4758 The "data" file updates rules for Mexico. 4759 4760 4761 Release data96b - 1996-01-27 15:44:42 -0500 4762 4763 Kiribati change 4764 4765 4766 Release code96c - 1996-01-16 16:58:15 -0500 4767 4768 leap-year streamlining and binary-search changes 4769 4770 fix to newctime.3 4771 4772 4773 Release code96b - 1996-01-10 20:42:39 -0500 4774 4775 fixes and enhancements from Paul Eggert, including code that 4776 emulates the behavior of recent versions of the SunOS "date" 4777 command. 4778 4779 4780 Release 96a - 1996-01-06 09:08:24 -0500 4781 4782 Israel updates 4783 4784 fixes to strftime.c for correct ISO 8601 week number generation, 4785 plus support for two new formats ('G' and 'g') to give ISO 8601 year 4786 numbers (which are not necessarily the same as calendar year numbers) 4787 4788 4789 Release code95i-data95m - 1995-12-21 12:46:47 -0500 4790 4791 The latest revisions from Paul Eggert are included, the usno1995 4792 file has been updated, and a new file ("WWW") covering useful URLs 4793 has been added. 4794 4795 4796 Release code95h-data95l - 1995-12-19 18:10:12 -0500 4797 4798 A simplification of a macro definition, a change to data for Sudan, 4799 and (for last minute shoppers) notes in the "Music" file on the CD 4800 "Old Man Time". 4801 4802 4803 Release code95g-data95k - 1995-10-30 10:32:47 -0500 4804 4805 (slightly reformatted) 8-bit-clean proposed patch 4806 4807 minor patch: US/Eastern -> America/New_York 4808 4809 snapshot of the USNO's latest data ("usno1995") 4810 4811 some other minor cleanups 4812 4813 4814 Release code95f-data95j - 1995-10-28 21:01:34 -0000 4815 [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!] 4816 4817 European cleanups 4818 4819 support for 64-bit time_t's 4820 4821 optimization in localtime.c 4822 4823 4824 Release code95e - 1995-10-13 13:23:57 -0400 4825 4826 the mktime change to scan from future to past when trying to find time zone 4827 offsets 4828 4829 4830 Release data95i - 1995-09-26 10:43:26 -0400 4831 4832 For Canada/Central, guess that the Sun customer's "one week too 4833 early" was just a approximation, and the true error is one month 4834 too early. This is consistent with the rest of Canada. 4835 4836 4837 Release data95h - 1995-09-21 11:26:48 -0400 4838 4839 latest changes from Paul Eggert 4840 4841 4842 Release code95d - 1995-09-14 11:14:45 -0400 4843 4844 the addition of a "Music" file, which documents four recorded 4845 versions of the tune "Save That Time". 4846 4847 4848 Release data95g - 1995-09-01 17:21:36 -0400 4849 4850 "yearistype" correction 4851 4852 4853 Release data95f - 1995-08-28 20:46:56 -0400 4854 4855 Paul Eggert's change to the australasia file 4856 4857 4858 Release data95e - 1995-07-08 18:02:34 -0400 4859 4860 The only change is a leap second at the end of this year. 4861 Thanks to Bradley White for forwarding news on the leap second. 4862 4863 4864 Release data95d - 1995-07-03 13:26:22 -0400 4865 4866 Paul Eggert's changes 4867 4868 4869 Release data95c - 1995-07-02 19:19:28 -0400 4870 4871 changes to "asia", "backward", "europe", and "southamerica" 4872 (read: northamericacentrics need not apply) 4873 4874 4875 Release code95c - 1995-03-13 14:00:46 -0500 4876 4877 one-line fix for sign extension problems in detzcode 4878 4879 4880 Release 95b - 1995-03-04 11:22:38 -0500 4881 4882 Minor changes in both: 4883 4884 The "code" file contains a workaround for the lack of "unistd.h" in 4885 Microsoft C++ version 7. 4886 4887 The "data" file contains a fixed "Link" for America/Shiprock. 4888 4889 4890 Release 94h - 1994-12-10 12:51:14 -0500 4891 4892 The files: 4893 4894 * incorporate the changes to "zdump" and "date" to make changes to 4895 the "TZ" environment variable permanent; 4896 4897 * incorporate the table changes by Paul Eggert; 4898 4899 * include (and document) support for universal time specifications in 4900 data files - but do not (yet) include use of this feature in the 4901 data files. 4902 4903 Think of this as "TZ Classic" - the software has been set up not to break if 4904 universal time shows up in its input, and data entries have been 4905 left as is so as not to break existing implementations. 4906 4907 4908 Release data94f - 1994-08-20 12:56:09 -0400 4909 4910 (with thanks!) the latest data updates from Paul Eggert 4911 4912 4913 Release data94e - 1994-06-04 13:13:53 -0400 4914 4915 [not summarized] 4916 4917 4918 Release code94g - 1994-05-05 12:14:07 -0400 4919 4920 fix missing "optind.c" and a reference to it in the Makefile 4921 4922 4923 Release code94f - 1994-05-05 13:00:33 -0000 4924 [tzcode94f.tar.gz is missing!] 4925 4926 changes to avoid overflow in difftime, as well as changes to cope 4927 with the 52/53 challenge in strftime 4928 4929 4930 Release code94e - 1994-03-30 23:32:59 -0500 4931 4932 change for the benefit of PCTS 4933 4934 4935 Release 94d - 1994-02-24 15:42:25 -0500 4936 4937 Avoid clashes with POSIX semantics for zones such as GMT+4. 4938 4939 Some other very minor housekeeping is also present. 4940 4941 4942 Release code94c - 1994-02-10 08:52:40 -0500 4943 4944 Fix bug where mkdirs was broken unless you compile with 4945 -fwritable-strings (which is generally losing to do). 4946 4947 4948 Release 94b - 1994-02-07 10:04:33 -0500 4949 4950 work by Paul Eggert who notes: 4951 4952 I found another book of time zone histories by E W Whitman; it's not 4953 as extensive as Shanks but has a few goodies of its own. I used it 4954 to update the tables. I also fixed some more as a result of 4955 correspondence with Adam David and Peter Ilieve, and move some stray 4956 links from 'europe' to 'backward'. I corrected some scanning errors 4957 in usno1989. 4958 4959 As far as the code goes, I fixed zic to allow years in the range 4960 INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900. 4961 And I cleaned up the zic documentation a little bit. 4962 4963 4964 Release data94a - 1994-02-03 08:58:54 -0500 4965 4966 It simply incorporates the recently announced leap second into the 4967 "leapseconds" file. 4968 4969 4970 Release 93g - 1993-11-22 17:28:27 -0500 4971 4972 Paul Eggert has provided a good deal of historic information (based 4973 on Shanks), and there are some code changes to deal with the buglets 4974 that crawled out in dealing with the new information. 4975 4976 4977 Release 93f - 1993-10-15 12:27:46 -0400 4978 4979 Paul Eggert's changes 4980 4981 4982 Release 93e - 1993-09-05 21:21:44 -0400 4983 4984 This has updated data for Israel, England, and Kwajalein. There's 4985 also an update to "zdump" to cope with Kwajalein's 24-hour jump. 4986 Thanks to Paul Eggert and Peter Ilieve for the changes. 4987 4988 4989 Release 93d - 1993-06-17 23:34:17 -0400 4990 4991 new fix and new data on Israel 4992 4993 4994 Release 93c - 1993-06-06 19:31:55 -0400 4995 4996 [not summarized] 4997 4998 4999 Release 93b - 1993-02-02 14:53:58 -0500 5000 5001 updated "leapseconds" file 5002 5003 5004 Release 93 - 1993-01-08 07:01:06 -0500 5005 5006 At kre's suggestion, the package has been split in two - a code piece 5007 (which also includes documentation) that's only of use to folks who 5008 want to recompile things and a data piece useful to anyone who can 5009 run "zic". 5010 5011 The new version has a few changes to the data files, a few 5012 portability changes, and an off-by-one fix (with thanks to 5013 Tom Karzes at deshaw.com for providing a description and a 5014 solution). 5015 5016 5017 Release 92c - 1992-11-21 17:35:36 -0000 5018 [tz92c.tar.Z is missing!] 5019 5020 The fallout from the latest round of DST transitions. 5021 5022 There are changes for Portugal, Saskatchewan, and "Pacific-New"; 5023 there's also a change to "zic.c" that makes it portable to more systems. 5024 5025 5026 Release 92 - 1992-04-25 18:17:03 -0000 5027 [tz92.tar.Z is missing!] 5028 5029 By popular demand (well, at any rate, following a request by kre at munnari) 5030 5031 5032 The 1989 update of the time zone package featured: 5033 5034 * POSIXization (including interpretation of POSIX-style TZ environment 5035 variables, provided by Guy Harris), 5036 * ANSIfication (including versions of "mktime" and "difftime"), 5037 * SVIDulation (an "altzone" variable) 5038 * MACHination (the "gtime" function) 5039 * corrections to some time zone data (including corrections to the rules 5040 for Great Britain and New Zealand) 5041 * reference data from the United States Naval Observatory for folks who 5042 want to do additional time zones 5043 * and the 1989 data for Saudi Arabia. 5044 5045 (Since this code will be treated as "part of the implementation" in some 5046 places and as "part of the application" in others, there's no good way to 5047 name functions, such as timegm, that are not part of the proposed ANSI C 5048 standard; such functions have kept their old, underscore-free names in this 5049 update.) 5050 5051 And the "dysize" function has disappeared; it was present to allow 5052 compilation of the "date" command on old BSD systems, and a version of "date" 5053 is now provided in the package. The "date" command is not created when you 5054 "make all" since it may lack options provided by the version distributed with 5055 your operating system, or may not interact with the system in the same way 5056 the native version does. 5057 5058 Since POSIX frowns on correct leap second handling, the default behavior of 5059 the "zic" command (in the absence of a "-L" option) has been changed to omit 5060 leap second information from its output files. 5061 5062 5063 ----- 5064 Notes 5065 5066 This file contains copies of the part of each release announcement 5067 that talks about the changes in that release. The text has been 5068 adapted and reformatted for the purposes of this file. 5069 5070 Traditionally a release R consists of a pair of tarball files, 5071 tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g., 5072 code2010a, data2012c) consist of just one or the other tarball, and a 5073 few (e.g., code2012c-data2012d) have tarballs with mixed version 5074 numbers. Recent releases also come in an experimental format 5075 consisting of a single tarball tzdb-R.tar.lz with extra data. 5076 5077 Release timestamps are taken from the release's commit (for newer, 5078 Git-based releases), from the newest file in the tarball (for older 5079 releases, where this info is available) or from the email announcing 5080 the release (if all else fails; these are marked with a time zone 5081 abbreviation of -0000 and an "is missing!" comment). 5082 5083 Earlier versions of the code and data were not announced on the tz 5084 list and are not summarized here. 5085 5086 This file is in the public domain. 5087 5088 Local Variables: 5089 coding: utf-8 5090 End: 5091
Indexes created Tue Sep 30 17:09:57 GMT 2025