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