NEWS revision 1.17
1 News for the tz database 2 3 Release 2016g - 2016-09-13 08:56:38 -0700 4 5 Changes to future time stamps 6 7 Turkey switched from EET/EEST (+02/+03) to permanent +03, 8 effective 2016-09-07. (Thanks to Burak AYDIN.) Use "+03" rather 9 than an invented abbreviation for the new time. 10 11 New leap second 2016-12-31 23:59:60 UTC as per IERS Bulletin C 52. 12 (Thanks to Tim Parenti.) 13 14 Changes to past time stamps 15 16 For America/Los_Angeles, spring-forward transition times have been 17 corrected from 02:00 to 02:01 in 1948, and from 02:00 to 01:00 in 18 1950-1966. 19 20 For zones using Soviet time on 1919-07-01, transitions to UT-based 21 time were at 00:00 UT, not at 02:00 local time. The affected 22 zones are Europe/Kirov, Europe/Moscow, Europe/Samara, and 23 Europe/Ulyanovsk. (Thanks to Alexander Belopolsky.) 24 25 Changes to past and future time zone abbreviations 26 27 The Factory zone now uses the time zone abbreviation -00 instead 28 of a long English-language string, as -00 is now the normal way to 29 represent an undefined time zone. 30 31 Several zones in Antarctica and the former Soviet Union, along 32 with zones intended for ships at sea that cannot use POSIX TZ 33 strings, now use numeric time zone abbreviations instead of 34 invented or obsolete alphanumeric abbreviations. The affected 35 zones are Antarctica/Casey, Antarctica/Davis, 36 Antarctica/DumontDUrville, Antarctica/Mawson, Antarctica/Rothera, 37 Antarctica/Syowa, Antarctica/Troll, Antarctica/Vostok, 38 Asia/Anadyr, Asia/Ashgabat, Asia/Baku, Asia/Bishkek, Asia/Chita, 39 Asia/Dushanbe, Asia/Irkutsk, Asia/Kamchatka, Asia/Khandyga, 40 Asia/Krasnoyarsk, Asia/Magadan, Asia/Omsk, Asia/Sakhalin, 41 Asia/Samarkand, Asia/Srednekolymsk, Asia/Tashkent, Asia/Tbilisi, 42 Asia/Ust-Nera, Asia/Vladivostok, Asia/Yakutsk, Asia/Yekaterinburg, 43 Asia/Yerevan, Etc/GMT-14, Etc/GMT-13, Etc/GMT-12, Etc/GMT-11, 44 Etc/GMT-10, Etc/GMT-9, Etc/GMT-8, Etc/GMT-7, Etc/GMT-6, Etc/GMT-5, 45 Etc/GMT-4, Etc/GMT-3, Etc/GMT-2, Etc/GMT-1, Etc/GMT+1, Etc/GMT+2, 46 Etc/GMT+3, Etc/GMT+4, Etc/GMT+5, Etc/GMT+6, Etc/GMT+7, Etc/GMT+8, 47 Etc/GMT+9, Etc/GMT+10, Etc/GMT+11, Etc/GMT+12, Europe/Kaliningrad, 48 Europe/Minsk, Europe/Samara, Europe/Volgograd, and 49 Indian/Kerguelen. For Europe/Moscow the invented abbreviation MSM 50 was replaced by +05, whereas MSK and MSD were kept as they are not 51 our invention and are widely used. 52 53 Changes to zone names 54 55 Rename Asia/Rangoon to Asia/Yangon, with a backward compatibility link. 56 (Thanks to David Massoud.) 57 58 Changes to code 59 60 zic no longer generates binary files containing POSIX TZ-like 61 strings that disagree with the local time type after the last 62 explicit transition in the data. This fixes a bug with 63 Africa/Casablanca and Africa/El_Aaiun in some year-2037 time 64 stamps on the reference platform. (Thanks to Alexander Belopolsky 65 for reporting the bug and suggesting a way forward.) 66 67 If the installed localtime and/or posixrules files are symbolic 68 links, zic now keeps them symbolic links when updating them, for 69 compatibility with platforms like OpenSUSE where other programs 70 configure these files as symlinks. 71 72 zic now avoids hard linking to symbolic links, avoids some 73 unnecessary mkdir and stat system calls, and uses shorter file 74 names internally. 75 76 zdump has a new -i option to generate transitions in a 77 more-compact but still human-readable format. This option is 78 experimental, and the output format may change in future versions. 79 (Thanks to Jon Skeet for suggesting that an option was needed, 80 and thanks to Tim Parenti and Chris Rovick for further comments.) 81 82 Changes to build procedure 83 84 An experimental distribution format is available, in addition 85 to the traditional format which will continue to be distributed. 86 The new format is a tarball tzdb-VERSION.tar.lz with signature 87 file tzdb-VERSION.tar.lz.asc. It unpacks to a top-level directory 88 tzdb-VERSION containing the code and data of the traditional 89 two-tarball format, along with extra data that may be useful. 90 (Thanks to Antonio Diaz Diaz, Oscar van Vlijmen, and many others 91 for comments about the experimental format.) 92 93 The release version number is now more accurate in the usual case 94 where releases are built from a Git repository. For example, if 95 23 commits and some working-file changes have been made since 96 release 2016g, the version number is now something like 97 '2016g-23-g50556e3-dirty' instead of the misleading '2016g'. 98 Official releases uses the same version number format as before, 99 e.g., '2016g'. To support the more-accurate version number, its 100 specification has moved from a line in the Makefile to a new 101 source file 'version'. 102 103 The experimental distribution contains a file to2050.tzs that 104 contains what should be the output of 'zdump -i -c 2050' on 105 primary zones. If this file is available, 'make check' now checks 106 that zdump generates this output. 107 108 'make check_web' now works on Fedora-like distributions. 109 110 Changes to documentation and commentary 111 112 tzfile.5 now documents the new restriction on POSIX TZ-like 113 strings that is now implemented by zic. 114 115 Comments now cite URLs for some 1917-1921 Russian DST decrees. 116 (Thanks to Alexander Belopolsky.) 117 118 tz-link.htm mentions JuliaTime (thanks to Curtis Vogt) and Time4J 119 (thanks to Meno Hochschild) and ThreeTen-Extra, and its 120 description of Java 8 has been brought up to date (thanks to 121 Stephen Colebourne). Its description of local time on Mars has 122 been updated to match current practice, and URLs have been updated 123 and some obsolete ones removed. 124 125 126 Release 2016f - 2016-07-05 16:26:51 +0200 127 128 Changes affecting future time stamps 129 130 The Egyptian government changed its mind on short notice, and 131 Africa/Cairo will not introduce DST starting 2016-07-07 after all. 132 (Thanks to Mina Samuel.) 133 134 Asia/Novosibirsk switches from +06 to +07 on 2016-07-24 at 02:00. 135 (Thanks to Stepan Golosunov.) 136 137 Changes to past and future time stamps 138 139 Asia/Novokuznetsk and Asia/Novosibirsk now use numeric time zone 140 abbreviations instead of invented ones. 141 142 Changes affecting past time stamps 143 144 Europe/Minsk's 1992-03-29 spring-forward transition was at 02:00 not 00:00. 145 (Thanks to Stepan Golosunov.) 146 147 148 Release 2016e - 2016-06-14 08:46:16 -0700 149 150 Changes affecting future time stamps 151 152 Africa/Cairo observes DST in 2016 from July 7 to the end of October. 153 Guess October 27 and 24:00 transitions. (Thanks to Steffen Thorsen.) 154 For future years, guess April's last Thursday to October's last 155 Thursday except for Ramadan. 156 157 Changes affecting past time stamps 158 159 Locations while uninhabited now use '-00', not 'zzz', as a 160 placeholder time zone abbreviation. This is inspired by Internet 161 RFC 3339 and is more consistent with numeric time zone 162 abbreviations already used elsewhere. The change affects several 163 arctic and antarctic locations, e.g., America/Cambridge_Bay before 164 1920 and Antarctica/Troll before 2005. 165 166 Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was 167 at 03:00, not 23:00 the previous day. (Thanks to Michael Deckers.) 168 169 Changes to code 170 171 zic now outputs a dummy transition at time 2**31 - 1 in zones 172 whose POSIX-style TZ strings contain a '<'. This mostly works 173 around Qt bug 53071 <https://bugreports.qt.io/browse/QTBUG-53071>. 174 (Thanks to Zhanibek Adilbekov for reporting the Qt bug.) 175 176 Changes affecting documentation and commentary 177 178 tz-link.htm says why governments should give plenty of notice for 179 time zone or DST changes, and refers to Matt Johnson's blog post. 180 181 tz-link.htm mentions Tzdata for Elixir. (Thanks to Matt Johnson.) 182 183 184 Release 2016d - 2016-04-17 22:50:29 -0700 185 186 Changes affecting future time stamps 187 188 America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30. 189 (Thanks to Alexander Krivenyshev for the heads-up.) 190 191 Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00. 192 (Thanks to Alexander Krivenyshev and Matt Johnson.) 193 194 New zone Asia/Tomsk, split off from Asia/Novosibirsk. It covers 195 Tomsk Oblast, Russia, which switches from +06 to +07 on 2016-05-29 196 at 02:00. (Thanks to Stepan Golosunov.) 197 198 Changes affecting past time stamps 199 200 New zone Europe/Kirov, split off from Europe/Volgograd. It covers 201 Kirov Oblast, Russia, which switched from +04/+05 to +03/+04 on 202 1989-03-26 at 02:00, roughly a year after Europe/Volgograd made 203 the same change. (Thanks to Stepan Golosunov.) 204 205 Russia and nearby locations had daylight-saving transitions on 206 1992-03-29 at 02:00 and 1992-09-27 at 03:00, instead of on 207 1992-03-28 at 23:00 and 1992-09-26 at 23:00. (Thanks to Stepan 208 Golosunov.) 209 210 Many corrections to historical time in Kazakhstan from 1991 211 through 2005. (Thanks to Stepan Golosunov.) Replace Kazakhstan's 212 invented time zone abbreviations with numeric abbreviations. 213 214 Changes to commentary 215 216 Mention Internet RFCs 7808 (TZDIST) and 7809 (CalDAV time zone references). 217 218 219 Release 2016c - 2016-03-23 00:51:27 -0700 220 221 Changes affecting future time stamps 222 223 Azerbaijan no longer observes DST. (Thanks to Steffen Thorsen.) 224 225 Chile reverts from permanent to seasonal DST. (Thanks to Juan 226 Correa for the heads-up, and to Tim Parenti for corrections.) 227 Guess that future transitions are August's and May's second 228 Saturdays at 24:00 mainland time. Also, call the period from 229 2014-09-07 through 2016-05-14 daylight saving time instead of 230 standard time, as that seems more appropriate now. 231 232 Changes affecting past time stamps 233 234 Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to 235 +02/+03 on 1989-03-26, not 1991-03-31. Europe/Volgograd changed 236 from +04/+05 to +03/+04 on 1988-03-27, not 1989-03-26. 237 (Thanks to Stepan Golosunov.) 238 239 Changes to commentary 240 241 Several updates and URLs for historical and proposed Russian changes. 242 (Thanks to Stepan Golosunov, Matt Johnson, and Alexander Krivenyshev.) 243 244 245 Release 2016b - 2016-03-12 17:30:14 -0800 246 247 Compatibility note 248 249 Starting with release 2016b, some data entries cause zic implementations 250 derived from tz releases 2005j through 2015e to issue warnings like 251 "time zone abbreviation differs from POSIX standard (+03)". 252 These warnings should not otherwise affect zic's output and can safely be 253 ignored on today's platforms, as the warnings refer to a restriction in 254 POSIX.1-1988 that was removed in POSIX.1-2001. One way to suppress the 255 warnings is to upgrade to zic derived from tz releases 2015f and later. 256 257 Changes affecting future time stamps 258 259 New zones Europe/Astrakhan and Europe/Ulyanovsk for Astrakhan and 260 Ulyanovsk Oblasts, Russia, both of which will switch from +03 to +04 on 261 2016-03-27 at 02:00 local time. They need distinct zones since their 262 post-1970 histories disagree. New zone Asia/Barnaul for Altai Krai and 263 Altai Republic, Russia, which will switch from +06 to +07 on the same date 264 and local time. The Astrakhan change is already official; the others have 265 passed the first reading in the State Duma and are extremely likely. 266 Also, Asia/Sakhalin moves from +10 to +11 on 2016-03-27 at 02:00. 267 (Thanks to Alexander Krivenyshev for the heads-up, and to Matt Johnson 268 and Stepan Golosunov for followup.) 269 270 As a trial of a new system that needs less information to be made up, 271 the new zones use numeric time zone abbreviations like "+04" 272 instead of invented abbreviations like "ASTT". 273 274 Haiti will not observe DST in 2016. (Thanks to Jean Antoine via 275 Steffen Thorsen.) 276 277 Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00. 278 (Thanks to Hannah Kreitem.) Guess future transitions will be March's last 279 Saturday at 01:00, not March's last Friday at 24:00. 280 281 Changes affecting past time stamps 282 283 Europe/Chisinau observed DST during 1990, and switched from +04 to 284 +03 at 1990-05-06 02:00, instead of switching from +03 to +02. 285 (Thanks to Stepan Golosunov.) 286 287 1991 abbreviations in Europe/Samara should be SAMT/SAMST, not 288 KUYT/KUYST. (Thanks to Stepan Golosunov.) 289 290 Changes to code 291 292 tzselect's diagnostics and checking, and checktab.awk's checking, 293 have been improved. (Thanks to J William Piggott.) 294 295 tzcode now builds under MinGW. (Thanks to Ian Abbott and Esben Haabendal.) 296 297 tzselect now tests Julian-date TZ settings more accurately. 298 (Thanks to J William Piggott.) 299 300 Changes to commentary 301 302 Comments in zone tables have been improved. (Thanks to J William Piggott.) 303 304 tzselect again limits its menu comments so that menus fit on a 305 24x80 alphanumeric display. 306 307 A new web page tz-how-to.html. (Thanks to Bill Seymour.) 308 309 In the Theory file, the description of possible time zone abbreviations in 310 tzdata has been cleaned up, as the old description was unclear and 311 inconsistent. (Thanks to Alain Mouette for reporting the problem.) 312 313 314 Release 2016a - 2016-01-26 23:28:02 -0800 315 316 Changes affecting future time stamps 317 318 America/Cayman will not observe daylight saving this year after all. 319 Revert our guess that it would. (Thanks to Matt Johnson.) 320 321 Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00. 322 (Thanks to Alexander Krivenyshev.) 323 324 Asia/Tehran now has DST predictions for the year 2038 and later, 325 to be March 21 00:00 to September 21 00:00. This is likely better 326 than predicting no DST, albeit off by a day every now and then. 327 328 Changes affecting past and future time stamps 329 330 America/Metlakatla switched from PST all year to AKST/AKDT on 331 2015-11-01 at 02:00. (Thanks to Steffen Thorsen.) 332 333 America/Santa_Isabel has been removed, and replaced with a 334 backward compatibility link to America/Tijuana. Its contents were 335 apparently based on a misreading of Mexican legislation. 336 337 Changes affecting past time stamps 338 339 Asia/Karachi's two transition times in 2002 were off by a minute. 340 (Thanks to Matt Johnson.) 341 342 Changes affecting build procedure 343 344 An installer can now combine leap seconds with use of the backzone file, 345 e.g., with 'make PACKRATDATA=backzone REDO=posix_right zones'. 346 The old 'make posix_packrat' rule is now marked as obsolescent. 347 (Thanks to Ian Abbott for an initial implementation.) 348 349 Changes affecting documentation and commentary 350 351 A new file LICENSE makes it easier to see that the code and data 352 are mostly public-domain. (Thanks to James Knight.) The three 353 non-public-domain files now use the current (3-clause) BSD license 354 instead of older versions of that license. 355 356 tz-link.htm mentions the BDE library (thanks to Andrew Paprocki), 357 CCTZ (thanks to Tim Parenti), TimeJones.com, and has a new section 358 on editing tz source files (with a mention of Sublime zoneinfo, 359 thanks to Gilmore Davidson). 360 361 The Theory and asia files now mention the 2015 book "The Global 362 Transformation of Time, 1870-1950", and cite a couple of reviews. 363 364 The America/Chicago entry now documents the informal use of US 365 central time in Fort Pierre, South Dakota. (Thanks to Rick 366 McDermid, Matt Johnson, and Steve Jones.) 367 368 369 Release 2015g - 2015-10-01 00:39:51 -0700 370 371 Changes affecting future time stamps 372 373 Turkey's 2015 fall-back transition is scheduled for Nov. 8, not Oct. 25. 374 (Thanks to Fatih.) 375 376 Norfolk moves from +1130 to +1100 on 2015-10-04 at 02:00 local time. 377 (Thanks to Alexander Krivenyshev.) 378 379 Fiji's 2016 fall-back transition is scheduled for January 17, not 24. 380 (Thanks to Ken Rylander.) 381 382 Fort Nelson, British Columbia will not fall back on 2015-11-01. It has 383 effectively been on MST (-0700) since it advanced its clocks on 2015-03-08. 384 New zone America/Fort_Nelson. (Thanks to Matt Johnson.) 385 386 Changes affecting past time stamps 387 388 Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00. 389 390 Changes affecting code 391 392 localtime no longer mishandles America/Anchorage after 2037. 393 (Thanks to Bradley White for reporting the bug.) 394 395 On hosts with signed 32-bit time_t, localtime no longer mishandles 396 Pacific/Fiji after 2038-01-16 14:00 UTC. 397 398 The localtime module allows the variables 'timezone', 'daylight', 399 and 'altzone' to be in common storage shared with other modules, 400 and declares them in case the system <time.h> does not. 401 (Problems reported by Kees Dekker.) 402 403 On platforms with tm_zone, strftime.c now assumes it is not NULL. 404 This simplifies the code and is consistent with zdump.c. 405 (Problem reported by Christos Zoulas.) 406 407 Changes affecting documentation 408 409 The tzfile man page now documents that transition times denote the 410 starts (not the ends) of the corresponding time periods. 411 (Ambiguity reported by Bill Seymour.) 412 413 414 Release 2015f - 2015-08-10 18:06:56 -0700 415 416 Changes affecting future time stamps 417 418 North Korea switches to +0830 on 2015-08-15. (Thanks to Steffen Thorsen.) 419 The abbreviation remains "KST". (Thanks to Robert Elz.) 420 421 Uruguay no longer observes DST. (Thanks to Steffen Thorsen 422 and Pablo Camargo.) 423 424 Changes affecting past and future time stamps 425 426 Moldova starts and ends DST at 00:00 UTC, not at 01:00 UTC. 427 (Thanks to Roman Tudos.) 428 429 Changes affecting data format and code 430 431 zic's '-y YEARISTYPE' option is no longer documented. The TYPE 432 field of a Rule line should now be '-'; the old values 'even', 433 'odd', 'uspres', 'nonpres', 'nonuspres' were already undocumented. 434 Although the implementation has not changed, these features do not 435 work in the default installation, they are not used in the data, 436 and they are now considered obsolescent. 437 438 zic now checks that two rules don't take effect at the same time. 439 (Thanks to Jon Skeet and Arthur David Olson.) Constraints on 440 simultaneity are now documented. 441 442 The two characters '%z' in a zone format now stand for the UTC 443 offset, e.g., '-07' for seven hours behind UTC and '+0530' for 444 five hours and thirty minutes ahead. This better supports time 445 zone abbreviations conforming to POSIX.1-2001 and later. 446 447 Changes affecting installed data files 448 449 Comments for America/Halifax and America/Glace_Bay have been improved. 450 (Thanks to Brian Inglis.) 451 452 Data entries have been simplified for Atlantic/Canary, Europe/Simferopol, 453 Europe/Sofia, and Europe/Tallinn. This yields slightly smaller 454 installed data files for Europe/Simferopol and Europe/Tallinn. 455 It does not affect timestamps. (Thanks to Howard Hinnant.) 456 457 Changes affecting code 458 459 zdump and zic no longer warn about valid time zone abbreviations 460 like '-05'. 461 462 Some Visual Studio 2013 warnings have been suppressed. 463 (Thanks to Kees Dekker.) 464 465 'date' no longer sets the time of day and its -a, -d, -n and -t 466 options have been removed. Long obsolescent, the implementation 467 of these features had porting problems. Builders no longer need 468 to configure HAVE_ADJTIME, HAVE_SETTIMEOFDAY, or HAVE_UTMPX_H. 469 (Thanks to Kees Dekker for pointing out the problem.) 470 471 Changes affecting documentation 472 473 The Theory file mentions naming issues earlier, as these seem to be 474 poorly publicized (thanks to Gilmore Davidson for reporting the problem). 475 476 tz-link.htm mentions Time Zone Database Parser (thanks to Howard Hinnant). 477 478 Mention that Herbert Samuel introduced the term "Summer Time". 479 480 481 Release 2015e - 2015-06-13 10:56:02 -0700 482 483 Changes affecting future time stamps 484 485 Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00, 486 not 06-13 and 07-18 as we had guessed. (Thanks to Milamber.) 487 488 Assume Cayman Islands will observe DST starting next year, using US rules. 489 Although it isn't guaranteed, it is the most likely. 490 491 Changes affecting data format 492 493 The file 'iso3166.tab' now uses UTF-8, so that its entries can better 494 spell the names of land Islands, Cte d'Ivoire, and Runion. 495 496 Changes affecting code 497 498 When displaying data, tzselect converts it to the current locale's 499 encoding if the iconv command works. (Problem reported by random832.) 500 501 tzselect no longer mishandles Dominica, fixing a bug introduced 502 in Release 2014f. (Problem reported by Owen Leibman.) 503 504 zic -l no longer fails when compiled with -DTZDEFAULT=\"/etc/localtime\". 505 This fixes a bug introduced in Release 2014f. 506 (Problem reported by Leonardo Chiquitto.) 507 508 509 Release 2015d - 2015-04-24 08:09:46 -0700 510 511 Changes affecting future time stamps 512 513 Egypt will not observe DST in 2015 and will consider canceling it 514 permanently. For now, assume no DST indefinitely. 515 (Thanks to Ahmed Nazmy and Tim Parenti.) 516 517 Changes affecting past time stamps 518 519 America/Whitehorse switched from UT -09 to -08 on 1967-05-28, not 520 1966-07-01. Also, Yukon's time zone history is documented better. 521 (Thanks to Brian Inglis and Dennis Ferguson.) 522 523 Change affecting past and future time zone abbreviations 524 525 The abbreviations for Hawaii-Aleutian standard and daylight times 526 have been changed from HAST/HADT to HST/HDT, as per US Government 527 Printing Office style. This affects only America/Adak since 1983, 528 as America/Honolulu was already using the new style. 529 530 Changes affecting code 531 532 zic has some minor performance improvements. 533 534 535 Release 2015c - 2015-04-11 08:55:55 -0700 536 537 Changes affecting future time stamps 538 539 Egypt's spring-forward transition is at 24:00 on April's last Thursday, 540 not 00:00 on April's last Friday. 2015's transition will therefore be on 541 Thursday, April 30 at 24:00, not Friday, April 24 at 00:00. Similar fixes 542 apply to 2026, 2037, 2043, etc. (Thanks to Steffen Thorsen.) 543 544 Changes affecting past time stamps 545 546 The following changes affect some pre-1991 Chile-related time stamps 547 in America/Santiago, Antarctica/Palmer, and Pacific/Easter. 548 549 The 1910 transition was January 10, not January 1. 550 551 The 1918 transition was September 10, not September 1. 552 553 The UT -04 time observed from 1932 to 1942 is now considered to 554 be standard time, not year-round DST. 555 556 Santiago observed DST (UT -03) from 1946-07-15 through 557 1946-08-31, then reverted to standard time, then switched to -05 558 on 1947-04-01. 559 560 Assume transitions before 1968 were at 00:00, since we have no data 561 saying otherwise. 562 563 The spring 1988 transition was 1988-10-09, not 1988-10-02. 564 The fall 1990 transition was 1990-03-11, not 1990-03-18. 565 566 Assume no UTC offset change for Pacific/Easter on 1890-01-01, 567 and omit all transitions on Pacific/Easter from 1942 through 1946 568 since we have no data suggesting that they existed. 569 570 One more zone has been turned into a link, as it differed 571 from an existing zone only for older time stamps. As usual, 572 this change affects UTC offsets in pre-1970 time stamps only. 573 The zone's old contents have been moved to the 'backzone' file. 574 The affected zone is America/Montreal. 575 576 Changes affecting commentary 577 578 Mention the TZUpdater tool. 579 580 Mention "The Time Now". (Thanks to Brandon Ramsey.) 581 582 583 Release 2015b - 2015-03-19 23:28:11 -0700 584 585 Changes affecting future time stamps 586 587 Mongolia will start observing DST again this year, from the last 588 Saturday in March at 02:00 to the last Saturday in September at 00:00. 589 (Thanks to Ganbold Tsagaankhuu.) 590 591 Palestine will start DST on March 28, not March 27. Also, 592 correct the fall 2014 transition from September 26 to October 24. 593 Adjust future predictions accordingly. (Thanks to Steffen Thorsen.) 594 595 Changes affecting past time stamps 596 597 The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a 598 regression. (Thanks to Stuart Bishop for reporting the problem.) 599 600 Some more zones have been turned into links, when they differed 601 from existing zones only for older time stamps. As usual, 602 these changes affect UTC offsets in pre-1970 time stamps only. 603 Their old contents have been moved to the 'backzone' file. 604 The affected zones are: America/Antigua, America/Cayman, 605 Pacific/Midway, and Pacific/Saipan. 606 607 Changes affecting time zone abbreviations 608 609 Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD". 610 (Thanks to Hank W.) 611 612 Changes affecting code 613 614 Fix integer overflow bug in reference 'mktime' implementation. 615 (Problem reported by Jrg Richter.) 616 617 Allow -Dtime_tz=time_t compilations, and allow -Dtime_tz=... libraries 618 to be used in the same executable as standard-library time_t functions. 619 (Problems reported by Bradley White.) 620 621 Changes affecting commentary 622 623 Cite the recent Mexican decree changing Quintana Roo's time zone. 624 (Thanks to Carlos Ral Perasso.) 625 626 Likewise for the recent Chilean decree. (Thanks to Eduardo Romero Urra.) 627 628 Update info about Mars time. 629 630 631 Release 2015a - 2015-01-29 22:35:20 -0800 632 633 Changes affecting future time stamps 634 635 The Mexican state of Quintana Roo, represented by America/Cancun, 636 will shift from Central Time with DST to Eastern Time without DST 637 on 2015-02-01 at 02:00. (Thanks to Steffen Thorsen and Gwillim Law.) 638 639 Chile will not change clocks in April or thereafter; its new standard time 640 will be its old daylight saving time. This affects America/Santiago, 641 Pacific/Easter, and Antarctica/Palmer. (Thanks to Juan Correa.) 642 643 New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49. 644 (Thanks to Tim Parenti.) 645 646 Changes affecting past time stamps 647 648 Iceland observed DST in 1919 and 1921, and its 1939 fallback 649 transition was Oct. 29, not Nov. 29. Remove incorrect data from 650 Shanks about time in Iceland between 1837 and 1908. 651 652 Some more zones have been turned into links, when they differed 653 from existing zones only for older time stamps. As usual, 654 these changes affect UTC offsets in pre-1970 time stamps only. 655 Their old contents have been moved to the 'backzone' file. 656 The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait, 657 and Asia/Muscat. 658 659 Changes affecting code 660 661 tzalloc now scrubs time zone abbreviations compatibly with the way 662 that tzset always has, by replacing invalid bytes with '_' and by 663 shortening too-long abbreviations. 664 665 tzselect ports to POSIX awk implementations, no longer mishandles 666 POSIX TZ settings when GNU awk is used, and reports POSIX TZ 667 settings to the user. (Thanks to Stefan Kuhn.) 668 669 Changes affecting build procedure 670 671 'make check' now checks for links to links in the data. 672 One such link (for Africa/Asmera) has been fixed. 673 (Thanks to Stephen Colebourne for pointing out the problem.) 674 675 Changes affecting commentary 676 677 The leapseconds file commentary now mentions the expiration date. 678 (Problem reported by Martin Burnicki.) 679 680 Update Mexican Library of Congress URL. 681 682 683 Release 2014j - 2014-11-10 17:37:11 -0800 684 685 Changes affecting current and future time stamps 686 687 Turks & Caicos' switch from US eastern time to UT -04 year-round 688 did not occur on 2014-11-02 at 02:00. It's currently scheduled 689 for 2015-11-01 at 02:00. (Thanks to Chris Walton.) 690 691 Changes affecting past time stamps 692 693 Many pre-1989 time stamps have been corrected for Asia/Seoul and 694 Asia/Pyongyang, based on sources for the Korean-language Wikipedia 695 entry for time in Korea. (Thanks to Sanghyuk Jung.) Also, no 696 longer guess that Pyongyang mimicked Seoul time after World War II, 697 as this is politically implausible. 698 699 Some more zones have been turned into links, when they differed 700 from existing zones only for older time stamps. As usual, 701 these changes affect UTC offsets in pre-1970 time stamps only. 702 Their old contents have been moved to the 'backzone' file. 703 The affected zones are: Africa/Addis_Ababa, Africa/Asmara, 704 Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Kampala, 705 Africa/Mogadishu, Indian/Antananarivo, Indian/Comoro, and 706 Indian/Mayotte. 707 708 Changes affecting commentary 709 710 The commentary is less enthusiastic about Shanks as a source, 711 and is more careful to distinguish UT from UTC. 712 713 714 Release 2014i - 2014-10-21 22:04:57 -0700 715 716 Changes affecting future time stamps 717 718 Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00. 719 (Thanks to Ken Rylander for the heads-up.) Guess that future 720 years will use a similar pattern. 721 722 A new Zone Pacific/Bougainville, for the part of Papua New Guinea 723 that plans to switch from UT +10 to +11 on 2014-12-28 at 02:00. 724 (Thanks to Kiley Walbom for the heads-up.) 725 726 Changes affecting time zone abbreviations 727 728 Since Belarus is not changing its clocks even though Moscow is, 729 the time zone abbreviation in Europe/Minsk is changing from FET 730 to its more-traditional value MSK on 2014-10-26 at 01:00. 731 (Thanks to Alexander Bokovoy for the heads-up about Belarus.) 732 733 The new abbreviation IDT stands for the pre-1976 use of UT +08 in 734 Indochina, to distinguish it better from ICT (+07). 735 736 Changes affecting past time stamps 737 738 Many time stamps have been corrected for Asia/Ho_Chi_Minh before 1976 739 (thanks to Trn Ngc Qun for an indirect pointer to Trn Tin Bnh's 740 authoritative book). Asia/Ho_Chi_Minh has been added to 741 zone1970.tab, to give tzselect users in Vietnam two choices, 742 since north and south Vietnam disagreed after our 1970 cutoff. 743 744 Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as 745 they differed from existing zones only for older time stamps. As 746 usual, these changes affect pre-1970 time stamps only. Their old 747 contents have been moved to the 'backzone' file. 748 749 Changes affecting code 750 751 The time-related library functions now set errno on failure, and 752 some crashes in the new tzalloc-related library functions have 753 been fixed. (Thanks to Christos Zoulas for reporting most of 754 these problems and for suggesting fixes.) 755 756 If USG_COMPAT is defined and the requested time stamp is standard time, 757 the tz library's localtime and mktime functions now set the extern 758 variable timezone to a value appropriate for that time stamp; and 759 similarly for ALTZONE, daylight saving time, and the altzone variable. 760 This change is a companion to the tzname change in 2014h, and is 761 designed to make timezone and altzone more compatible with tzname. 762 763 The tz library's functions now set errno to EOVERFLOW if they fail 764 because the result cannot be represented. ctime and ctime_r now 765 return NULL and set errno when a time stamp is out of range, rather 766 than having undefined behavior. 767 768 Some bugs associated with the new 2014g functions have been fixed. 769 This includes a bug that largely incapacitated the new functions 770 time2posix_z and posix2time_z. (Thanks to Christos Zoulas.) 771 It also includes some uses of uninitialized variables after tzalloc. 772 The new code uses the standard type 'ssize_t', which the Makefile 773 now gives porting advice about. 774 775 Changes affecting commentary 776 777 Updated URLs for NRC Canada (thanks to Matt Johnson and Brian Inglis). 778 779 780 Release 2014h - 2014-09-25 18:59:03 -0700 781 782 Changes affecting past time stamps 783 784 America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28. 785 786 Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01, 787 not 1920-01-06. The old entry was based on a misinterpretation of Shanks. 788 789 Some more zones have been turned into links, when they differed 790 from existing zones only for older time stamps. As usual, 791 these changes affect UTC offsets in pre-1970 time stamps only. 792 Their old contents have been moved to the 'backzone' file. 793 The affected zones are: Africa/Blantyre, Africa/Bujumbura, 794 Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi, 795 Africa/Lusaka, Africa/Maseru, and Africa/Mbabane. 796 797 Changes affecting code 798 799 zdump -V and -v now output gmtoff= values on all platforms, 800 not merely on platforms defining TM_GMTOFF. 801 802 The tz library's localtime and mktime functions now set tzname to a value 803 appropriate for the requested time stamp, and zdump now uses this 804 on platforms not defining TM_ZONE, fixing a 2014g regression. 805 (Thanks to Tim Parenti for reporting the problem.) 806 807 The tz library no longer sets tzname if localtime or mktime fails. 808 809 zdump -c no longer mishandles transitions near year boundaries. 810 (Thanks to Tim Parenti for reporting the problem.) 811 812 An access to uninitialized data has been fixed. 813 (Thanks to Jrg Richter for reporting the problem.) 814 815 When THREAD_SAFE is defined, the code ports to the C11 memory model. 816 A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined 817 and two threads race to initialize data used by gmtime-like functions. 818 (Thanks to Andy Heninger for reporting the problems.) 819 820 Changes affecting build procedure 821 822 'make check' now checks better for properly-sorted data. 823 824 Changes affecting documentation and commentary 825 826 zdump's gmtoff=N output is now documented, and its isdst=D output 827 is now documented to possibly output D values other than 0 or 1. 828 829 zdump -c's treatment of years is now documented to use the 830 Gregorian calendar and Universal Time without leap seconds, 831 and its behavior at cutoff boundaries is now documented better. 832 (Thanks to Arthur David Olson and Tim Parenti for reporting the problems.) 833 834 Programs are now documented to use the proleptic Gregorian calendar. 835 (Thanks to Alan Barrett for the suggestion.) 836 837 Fractional-second GMT offsets have been documented for civil time 838 in 19th-century Chennai, Jakarta, and New York. 839 840 841 Release 2014g - 2014-08-28 12:31:23 -0700 842 843 Changes affecting future time stamps 844 845 Turks & Caicos is switching from US eastern time to UT -04 846 year-round, modeled as a switch on 2014-11-02 at 02:00. 847 [As noted in 2014j, this switch was later delayed.] 848 849 Changes affecting past time stamps 850 851 Time in Russia or the USSR before 1926 or so has been corrected by 852 a few seconds in the following zones: Asia/Irkutsk, 853 Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi, 854 Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara. For 855 Asia/Yekaterinburg the correction is a few minutes. (Thanks to 856 Vladimir Karpinsky.) 857 858 The Portuguese decree of 1911-05-26 took effect on 1912-01-01. 859 This affects 1911 time stamps in Africa/Bissau, Africa/Luanda, 860 Atlantic/Azores, and Atlantic/Madeira. Also, Lisbon's pre-1912 861 GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32. 862 (Thanks to Stephen Colebourne for pointing to the decree.) 863 864 Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59. 865 866 A new file 'backzone' contains data which may appeal to 867 connoisseurs of old time stamps, although it is out of scope for 868 the tz database, is often poorly sourced, and contains some data 869 that is known to be incorrect. The new file is not recommended 870 for ordinary use and its entries are not installed by default. 871 (Thanks to Lester Caine for the high-quality Jersey, Guernsey, and 872 Isle of Man entries.) 873 874 Some more zones have been turned into links, when they differed 875 from existing zones only for older time stamps. As usual, 876 these changes affect UTC offsets in pre-1970 time stamps only. 877 Their old contents have been moved to the 'backzone' file. 878 The affected zones are: Africa/Bangui, Africa/Brazzaville, 879 Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda, 880 Africa/Malabo, Africa/Niamey, and Africa/Porto-Novo. 881 882 Changes affecting code 883 884 Unless NETBSD_INSPIRED is defined to 0, the tz library now 885 supplies functions for creating and using objects that represent 886 time zones. The new functions are tzalloc, tzfree, localtime_rz, 887 mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and 888 time2posix_z. They are intended for performance: for example, 889 localtime_rz (unlike localtime_r) is trivially thread-safe without 890 locking. (Thanks to Christos Zoulas for proposing NetBSD-inspired 891 functions, and to Alan Barrett and Jonathan Lennox for helping to 892 debug the change.) 893 894 zdump now builds with the tz library unless USE_LTZ is defined to 0, 895 This lets zdump use tz features even if the system library lacks them. 896 To build zdump with the system library, use 'make CFLAGS=-DUSE_LTZ=0 897 TZDOBJS=zdump.o CHECK_TIME_T_ALTERNATIVES='. 898 899 zdump now uses localtime_rz if available, as it's significantly faster, 900 and it can help zdump better diagnose invalid time zone names. 901 Define HAVE_LOCALTIME_RZ to 0 to suppress this. HAVE_LOCALTIME_RZ 902 defaults to 1 if NETBSD_INSPIRED && USE_LTZ. When localtime_rz is 903 not available, zdump now uses localtime_r and tzset if available, 904 as this is a bit cleaner and faster than plain localtime. Compile 905 with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system 906 lacks these two functions. 907 908 If THREAD_SAFE is defined to 1, the tz library is now thread-safe. 909 Although not needed for tz's own applications, which are single-threaded, 910 this supports POSIX better if the tz library is used in multithreaded apps. 911 912 Some crashes have been fixed when zdump or the tz library is given 913 invalid or outlandish input. 914 915 The tz library no longer mishandles leap seconds on platforms with 916 unsigned time_t in time zones that lack ordinary transitions after 1970. 917 918 The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not 919 already defined, to make it easier to configure on common platforms. 920 Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this. 921 922 Unless the new macro UNINIT_TRAP is defined to 1, the tz code now 923 assumes that reading uninitialized memory yields garbage values 924 but does not cause other problems such as traps. 925 926 If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now 927 more likely to guess right for ambiguous time stamps near 928 transitions where tm_isdst does not change. 929 930 If HAVE_STRFTIME_L is defined to 1, the tz library now defines 931 strftime_l for compatibility with recent versions of POSIX. 932 Only the C locale is supported, though. HAVE_STRFTIME_L defaults 933 to 1 on recent POSIX versions, and to 0 otherwise. 934 935 tzselect -c now uses a hybrid distance measure that works better 936 in Africa. (Thanks to Alan Barrett for noting the problem.) 937 938 The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used, 939 or when time_tz is defined. 940 941 When HAVE_UTMPX_H is set the 'date' command now builds on systems 942 whose <utmpx.h> file does not define WTMPX_FILE, and when setting 943 the date it updates the wtmpx file if _PATH_WTMPX is defined. 944 This affects GNU/Linux and similar systems. 945 946 For easier maintenance later, some C code has been simplified, 947 some lint has been removed, and the code has been tweaked so that 948 plain 'make' is more likely to work. 949 950 The C type 'bool' is now used for boolean values, instead of 'int'. 951 952 The long-obsolete LOCALE_HOME code has been removed. 953 954 The long-obsolete 'gtime' function has been removed. 955 956 Changes affecting build procedure 957 958 'zdump' no longer links in ialloc.o, as it's not needed. 959 960 'make check_time_t_alternatives' no longer assumes GNU diff. 961 962 Changes affecting distribution tarballs 963 964 The files checktab.awk and zoneinfo2tdf.pl are now distributed in 965 the tzdata tarball instead of the tzcode tarball, since they help 966 maintain the data. The NEWS and Theory files are now also 967 distributed in the tzdata tarball, as they're relevant for data. 968 (Thanks to Alan Barrett for pointing this out.) Also, the 969 leapseconds.awk file is no longer distributed in the tzcode 970 tarball, since it belongs in the tzdata tarball (where 2014f 971 inadvertently also distributed it). 972 973 Changes affecting documentation and commentary 974 975 A new file CONTRIBUTING is distributed. (Thanks to Tim Parenti for 976 suggesting a CONTRIBUTING file, and to Tony Finch and Walter Harms 977 for debugging it.) 978 979 The man pages have been updated to use function prototypes, 980 to document thread-safe variants like localtime_r, and to document 981 the NetBSD-inspired functions tzalloc, tzfree, localtime_rz, and 982 mktime_z. 983 984 The fields in Link lines have been renamed to be more descriptive 985 and more like the parameters of 'ln'. LINK-FROM has become TARGET, 986 and LINK-TO has become LINK-NAME. 987 988 tz-link.htm mentions the IETF's tzdist working group; Windows 989 Runtime etc. (thanks to Matt Johnson); and HP-UX's tztab. 990 991 Some broken URLs have been fixed in the commentary. (Thanks to 992 Lester Caine.) 993 994 Commentary about Philippines DST has been updated, and commentary 995 on pre-1970 time in India has been added. 996 997 998 Release 2014f - 2014-08-05 17:42:36 -0700 999 1000 Changes affecting future time stamps 1001 1002 Russia will subtract an hour from most of its time zones on 2014-10-26 1003 at 02:00 local time. (Thanks to Alexander Krivenyshev.) 1004 There are a few exceptions: Magadan Oblast (Asia/Magadan) and Zabaykalsky 1005 Krai are subtracting two hours; conversely, Chukotka Autonomous Okrug 1006 (Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka), Kemerovo Oblast 1007 (Asia/Novokuznetsk), and the Samara Oblast and the Udmurt Republic 1008 (Europe/Samara) are not changing their clocks. The changed zones are 1009 Europe/Kaliningrad, Europe/Moscow, Europe/Simferopol, Europe/Volgograd, 1010 Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk, 1011 Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Khandyga, 1012 Asia/Sakhalin, and Asia/Ust-Nera; Asia/Magadan will have two hours 1013 subtracted; and Asia/Novokuznetsk's time zone abbreviation is affected, 1014 but not its UTC offset. Two zones are added: Asia/Chita (split 1015 from Asia/Yakutsk, and also with two hours subtracted) and 1016 Asia/Srednekolymsk (split from Asia/Magadan, but with only one hour 1017 subtracted). (Thanks to Tim Parenti for much of the above.) 1018 1019 Changes affecting time zone abbreviations 1020 1021 Australian eastern time zone abbreviations are now AEST/AEDT not EST, 1022 and similarly for the other Australian zones. That is, for eastern 1023 standard and daylight saving time the abbreviations are AEST and AEDT 1024 instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT, 1025 and AWST/AWDT are now used instead of the former CST, CWST, and WST. 1026 This change does not affect UTC offsets, only time zone abbreviations. 1027 (Thanks to Rich Tibbett and many others.) 1028 1029 Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07) 1030 effective 2014-10-26 at 02:00 local time. 1031 1032 The time zone abbreviation for Xinjiang Time (observed in rmqi) 1033 has been changed from URUT to XJT. (Thanks to Luther Ma.) 1034 1035 Prefer MSK/MSD for Moscow time in Russia, even in other cities. 1036 Similarly, prefer EET/EEST for eastern European time in Russia. 1037 1038 Change time zone abbreviations in (western) Samoa to use "ST" and 1039 "DT" suffixes, as this is more likely to match common practice. 1040 Prefix "W" to (western) Samoa time when its standard-time offset 1041 disagrees with that of American Samoa. 1042 1043 America/Metlakatla now uses PST, not MeST, to abbreviate its time zone. 1044 1045 Time zone abbreviations have been updated for Japan's two time 1046 zones used 1896-1937. JWST now stands for Western Standard 1047 Time, and JCST for Central Standard Time (formerly this was CJT). 1048 These abbreviations are now used for time in Korea, Taiwan, 1049 and Sakhalin while controlled by Japan. 1050 1051 Changes affecting past time stamps 1052 1053 China's five zones have been simplified to two, since the post-1970 1054 differences in the other three seem to have been imaginary. The 1055 zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been 1056 removed; backwards-compatibility links still work, albeit with 1057 different behaviors for time stamps before May 1980. Asia/Urumqi's 1058 1980 transition to UT +08 has been removed, so that it is now at 1059 +06 and not +08. (Thanks to Luther Ma and to Alois Treindl; 1060 Treindl sent helpful translations of two papers by Guo Qingsheng.) 1061 1062 Some zones have been turned into links, when they differed from existing 1063 zones only for older UTC offsets where data entries were likely invented. 1064 These changes affect UTC offsets in pre-1970 time stamps only. This is 1065 similar to the change in release 2013e, except this time for western 1066 Africa. The affected zones are: Africa/Bamako, Africa/Banjul, 1067 Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome, 1068 Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, and 1069 Atlantic/St_Helena. This also affects the backwards-compatibility 1070 link Africa/Timbuktu. (Thanks to Alan Barrett, Stephen Colebourne, 1071 Tim Parenti, and David Patte for reporting problems in earlier 1072 versions of this change.) 1073 1074 Asia/Shanghai's pre-standard-time UT offset has been changed from 1075 8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its 1076 transition to standard time has been changed from 1928 to 1901. 1077 1078 Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01, 1079 then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945. 1080 In 1946 it observed DST from 05-15 through 09-30; in 1947 1081 from 04-15 through 10-31; and in 1979 from 07-01 through 09-30. 1082 (Thanks to Yu-Cheng Chuang.) 1083 1084 Asia/Riyadh's transition to standard time is now 1947-03-14, not 1950. 1085 1086 Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not 1087 10-03 at 00:00. (Thanks to Konstantin Hyppnen.) 1088 1089 Pacific/Pago_Pago has been changed from UT -11:30 to -11 for the 1090 period from 1911 to 1950. 1091 1092 Pacific/Chatham has been changed to New Zealand standard time plus 1093 45 minutes for the period before 1957, reflecting a 1956 remark in 1094 the New Zealand parliament. 1095 1096 Europe/Budapest has several pre-1946 corrections: in 1918 the transition 1097 out of DST was on 09-16, not 09-29; in 1919 it was on 11-24, not 09-15; in 1098 1945 it was on 11-01, not 11-03; in 1941 the transition to DST was 04-08 1099 not 04-06 at 02:00; and there was no DST in 1920. 1100 1101 Africa/Accra is now assumed to have observed DST from 1920 through 1935. 1102 1103 Time in Russia before 1927 or so has been corrected by a few seconds in 1104 the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi, 1105 Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg, Europe/Helsinki, and 1106 Europe/Riga. Also, Moscow's location has been changed to its Kilometer 0 1107 point. (Thanks to Vladimir Karpinsky for the Moscow changes.) 1108 1109 Changes affecting data format 1110 1111 A new file 'zone1970.tab' supersedes 'zone.tab' in the installed data. 1112 The new file's extended format allows multiple country codes per zone. 1113 The older file is still installed but is deprecated; its format is 1114 not changing and it will still be distributed for a while, but new 1115 applications should use the new file. 1116 1117 The new file format simplifies maintenance of obscure locations. 1118 To test this, it adds coverage for the Crozet Islands and the 1119 Scattered Islands. (Thanks to Tobias Conradi and Antoine Leca.) 1120 1121 The file 'iso3166.tab' is planned to switch from ASCII to UTF-8. 1122 It is still ASCII now, but commentary about the switch has been added. 1123 The new file 'zone1970.tab' already uses UTF-8. 1124 1125 Changes affecting code 1126 1127 'localtime', 'mktime', etc. now use much less stack space if ALL_STATE 1128 is defined. (Thanks to Elliott Hughes for reporting the problem.) 1129 1130 'zic' no longer mishandles input when ignoring case in locales that 1131 are not compatible with English, e.g., unibyte Turkish locales when 1132 compiled with HAVE_GETTEXT. 1133 1134 Error diagnostics of 'zic' and 'yearistype' have been reworded so that 1135 they no longer use ASCII '-' as if it were a dash. 1136 1137 'zic' now rejects output file names that contain '.' or '..' components. 1138 (Thanks to Tim Parenti for reporting the problem.) 1139 1140 'zic -v' now warns about output file names that do not follow 1141 POSIX rules, or that contain a digit or '.'. (Thanks to Arthur 1142 David Olson for starting the ball rolling on this.) 1143 1144 Some lint has been removed when using GCC_DEBUG_FLAGS with GCC 4.9.0. 1145 1146 Changes affecting build procedure 1147 1148 'zic' no longer links in localtime.o and asctime.o, as they're not needed. 1149 (Thanks to John Cochran.) 1150 1151 Changes affecting documentation and commentary 1152 1153 The 'Theory' file documents legacy names, the longstanding 1154 exceptions to the POSIX-inspired file name rules. 1155 1156 The 'zic' documentation clarifies the role of time types when 1157 interpreting dates. (Thanks to Arthur David Olson.) 1158 1159 Documentation and commentary now prefer UTF-8 to US-ASCII, 1160 allowing the use of proper accents in foreign words and names. 1161 Code and data have not changed because of this. (Thanks to 1162 Garrett Wollman, Ian Abbott, and Guy Harris for helping to debug 1163 this.) 1164 1165 Non-HTML documentation and commentary now use plain-text URLs instead of 1166 HTML insertions, and are more consistent about bracketing URLs when they 1167 are not already surrounded by white space. (Thanks to suggestions by 1168 Steffen Nurpmeso.) 1169 1170 There is new commentary about Xujiahui Observatory, the five time-zone 1171 project in China from 1918 to 1949, timekeeping in Japanese-occupied 1172 Shanghai, and Tibet Time in the 1950s. The sharp-eyed can spot the 1173 warlord Jin Shuren in the data. 1174 1175 Commentary about the coverage of each Russian zone has been standardized. 1176 (Thanks to Tim Parenti). 1177 1178 There is new commentary about contemporary timekeeping in Ethiopia. 1179 1180 Obsolete comments about a 2007 proposal for DST in Kuwait has been removed. 1181 1182 There is new commentary about time in Poland in 1919. 1183 1184 Proper credit has been given to DST inventor George Vernon Hudson. 1185 1186 Commentary about time in Metlakatla, AK and Resolute, NU has been 1187 improved, with a new source for the former. 1188 1189 In zone.tab, Pacific/Easter no longer mentions Salas y Gmez, as it 1190 is uninhabited. 1191 1192 Commentary about permanent Antarctic bases has been updated. 1193 1194 Several typos have been corrected. (Thanks to Tim Parenti for 1195 contributing some of these fixes.) 1196 1197 tz-link.htm now mentions the JavaScript libraries Moment Timezone, 1198 TimezoneJS.Date, Walltime-js, and Timezone. (Thanks to a heads-up 1199 from Matt Johnson.) Also, it mentions the Go 'latlong' package. 1200 (Thanks to a heads-up from Dirkjan Ochtman.) 1201 1202 The files usno1988, usno1989, usno1989a, usno1995, usno1997, and usno1998 1203 have been removed. These obsolescent US Naval Observatory entries were no 1204 longer helpful for maintenance. (Thanks to Tim Parenti for the suggestion.) 1205 1206 1207 Release 2014e - 2014-06-12 21:53:52 -0700 1208 1209 Changes affecting near-future time stamps 1210 1211 Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00. 1212 (Thanks to Imed Chihi.) Guess that from 2015 on Egypt will temporarily 1213 switch to standard time at 24:00 the last Thursday before Ramadan, and 1214 back to DST at 00:00 the first Friday after Ramadan. 1215 1216 Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00. (Thanks 1217 to Milamber Space Network.) Guess that from 2015 on Morocco will 1218 temporarily switch to standard time at 03:00 the last Saturday before 1219 Ramadan, and back to DST at 02:00 the first Saturday after Ramadan. 1220 1221 Changes affecting past time stamps 1222 1223 The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of 1224 "MSD" for Moscow's double daylight time in summer 1921. Also, a typo 1225 "VLASST" has been repaired to be "VLAST" for Vladivostok summer time 1226 in 1991. (Thanks to Hank W. for reporting the problems.) 1227 1228 Changes affecting commentary 1229 1230 tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the 1231 draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and 1232 removes stale pointers to World Time Explorer and WORLDTIME. 1233 1234 1235 Release 2014d - 2014-05-27 21:34:40 -0700 1236 1237 Changes affecting code 1238 1239 zic no longer generates files containing time stamps before the Big Bang. 1240 This works around GNOME bug 730332 1241 <https://bugzilla.gnome.org/show_bug.cgi?id=730332>. 1242 (Thanks to Leonardo Chiquitto for reporting the bug, and to 1243 Arthur David Olson and James Cloos for suggesting improvements to the fix.) 1244 1245 Changes affecting documentation 1246 1247 tz-link.htm now mentions GNOME. 1248 1249 1250 Release 2014c - 2014-05-13 07:44:13 -0700 1251 1252 Changes affecting near-future time stamps 1253 1254 Egypt observes DST starting 2014-05-15 at 24:00. 1255 (Thanks to Ahmad El-Dardiry and Gunther Vermier.) 1256 Details have not been announced, except that DST will not be observed 1257 during Ramadan. Guess that DST will stop during the same Ramadan dates as 1258 Morocco, and that Egypt's future spring and fall transitions will be the 1259 same as 2010 when it last observed DST, namely April's last Friday at 1260 00:00 to September's last Thursday at 23:00 standard time. Also, guess 1261 that Ramadan transitions will be at 00:00 standard time. 1262 1263 Changes affecting code 1264 1265 zic now generates transitions for minimum time values, eliminating guesswork 1266 when handling low-valued time stamps. (Thanks to Arthur David Olson.) 1267 1268 Port to Cygwin sans glibc. (Thanks to Arthur David Olson.) 1269 1270 Changes affecting commentary and documentation 1271 1272 Remove now-confusing comment about Jordan. (Thanks to Oleksii Nochovnyi.) 1273 1274 1275 Release 2014b - 2014-03-24 21:28:50 -0700 1276 1277 Changes affecting near-future time stamps 1278 1279 Crimea switches to Moscow time on 2014-03-30 at 02:00 local time. 1280 (Thanks to Alexander Krivenyshev.) Move its zone.tab entry from UA to RU. 1281 1282 New entry for Troll station, Antarctica. (Thanks to Paul-Inge Flakstad and 1283 Bengt-Inge Larsson.) This is currently an approximation; a better version 1284 will require the zic and localtime fixes mentioned below, and the plan is 1285 to wait for a while until at least the zic fixes propagate. 1286 1287 Changes affecting code 1288 1289 'zic' and 'localtime' no longer reject locations needing four transitions 1290 per year for the foreseeable future. (Thanks to Andrew Main (Zefram).) 1291 Also, 'zic' avoids some unlikely failures due to integer overflow. 1292 1293 Changes affecting build procedure 1294 1295 'make check' now detects Rule lines defined but never used. 1296 The NZAQ rules, an instance of this problem, have been removed. 1297 1298 Changes affecting commentary and documentation 1299 1300 Fix Tuesday/Thursday typo in description of time in Israel. 1301 (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.) 1302 1303 Microsoft Windows 8.1 doesn't support tz database names. (Thanks 1304 to Donald MacQueen.) Instead, the Microsoft Windows Store app 1305 library supports them. 1306 1307 Add comments about Johnston Island time in the 1960s. 1308 (Thanks to Lyle McElhaney.) 1309 1310 Morocco's 2014 DST start will be as predicted. 1311 (Thanks to Sebastien Willemijns.) 1312 1313 1314 Release 2014a - 2014-03-07 23:30:29 -0800 1315 1316 Changes affecting near-future time stamps 1317 1318 Turkey begins DST on 2014-03-31, not 03-30. (Thanks to Faruk Pasin for 1319 the heads-up, and to Tim Parenti for simplifying the update.) 1320 1321 Changes affecting past time stamps 1322 1323 Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00. 1324 (Thanks to Steffen Thorsen.) 1325 1326 Ukraine switched from Moscow to Eastern European time on 1990-07-01 1327 (not 1992-01-01), and observed DST during the entire next winter. 1328 (Thanks to Vladimir in Moscow via Alois Treindl.) 1329 1330 In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03. 1331 (Thanks to Avigdor Finkelstein.) 1332 1333 Changes affecting code 1334 1335 A uninitialized-storage bug in 'localtime' has been fixed. 1336 (Thanks to Logan Chien.) 1337 1338 Changes affecting the build procedure 1339 1340 The settings for 'make check_web' now default to Ubuntu 13.10. 1341 1342 Changes affecting commentary and documentation 1343 1344 The boundary of the US Pacific time zone is given more accurately. 1345 (Thanks to Alan Mintz.) 1346 1347 Chile's 2014 DST will be as predicted. (Thanks to Jos Miguel Garrido.) 1348 1349 Paraguay's 2014 DST will be as predicted. (Thanks to Carlos Ral Perasso.) 1350 1351 Better descriptions of countries with same time zone history as 1352 Trinidad and Tobago since 1970. (Thanks to Alan Barrett for suggestion.) 1353 1354 Several changes affect tz-link.htm, the main web page. 1355 1356 Mention Time.is (thanks to Even Scharning) and WX-now (thanks to 1357 David Braverman). 1358 1359 Mention xCal (Internet RFC 6321) and jCal. 1360 1361 Microsoft has some support for tz database names. 1362 1363 CLDR data formats include both XML and JSON. 1364 1365 Mention Maggiolo's map of solar vs standard time. 1366 (Thanks to Arthur David Olson.) 1367 1368 Mention TZ4Net. (Thanks to Matt Johnson.) 1369 1370 Mention the timezone-olson Haskell package. 1371 1372 Mention zeitverschiebung.net. (Thanks to Martin Jger.) 1373 1374 Remove moribund links to daylight-savings-time.info and to 1375 Simple Timer + Clocks. 1376 1377 Update two links. (Thanks to Oscar van Vlijmen.) 1378 1379 Fix some formatting glitches, e.g., remove random newlines from 1380 abbr elements' title attributes. 1381 1382 1383 Release 2013i - 2013-12-17 07:25:23 -0800 1384 1385 Changes affecting near-future time stamps: 1386 1387 Jordan switches back to standard time at 00:00 on December 20, 2013. 1388 The 2006-2011 transition schedule is planned to resume in 2014. 1389 (Thanks to Steffen Thorsen.) 1390 1391 Changes affecting past time stamps: 1392 1393 In 2004, Cuba began DST on March 28, not April 4. 1394 (Thanks to Steffen Thorsen.) 1395 1396 Changes affecting code 1397 1398 The compile-time flag NOSOLAR has been removed, as nowadays the 1399 benefit of slightly shrinking runtime table size is outweighed by the 1400 cost of disallowing potential future updates that exceed old limits. 1401 1402 Changes affecting documentation and commentary 1403 1404 The files solar87, solar88, and solar89 are no longer distributed. 1405 They were a negative experiment - that is, a demonstration that 1406 tz data can represent solar time only with some difficulty and error. 1407 Their presence in the distribution caused confusion, as Riyadh 1408 civil time was generally not solar time in those years. 1409 1410 tz-link.htm now mentions Noda Time. (Thanks to Matt Johnson.) 1411 1412 1413 Release 2013h - 2013-10-25 15:32:32 -0700 1414 1415 Changes affecting current and future time stamps: 1416 1417 Libya has switched its UT offset back to +02 without DST, instead 1418 of +01 with DST. (Thanks to Even Scharning.) 1419 1420 Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules. 1421 (Thanks to Gwillim Law.) 1422 1423 Changes affecting future time stamps: 1424 1425 Acre and (we guess) western Amazonas will switch from UT -04 to -05 1426 on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe. 1427 (Thanks to Steffen Thorsen.) 1428 1429 Add entries for DST transitions in Morocco in the year 2038. 1430 This avoids some year-2038 glitches introduced in 2013g. 1431 (Thanks to Yoshito Umaoka for reporting the problem.) 1432 1433 Changes affecting API 1434 1435 The 'tzselect' command no longer requires the 'select' command, 1436 and should now work with /bin/sh on more platforms. It also works 1437 around a bug in BusyBox awk before version 1.21.0. (Thanks to 1438 Patrick 'P. J.' McDermott and Alan Barrett.) 1439 1440 Changes affecting code 1441 1442 Fix localtime overflow bugs with 32-bit unsigned time_t. 1443 1444 zdump no longer assumes sscanf returns maximal values on overflow. 1445 1446 Changes affecting the build procedure 1447 1448 The builder can specify which programs to use, if any, instead of 1449 'ar' and 'ranlib', and libtz.a is now built locally before being 1450 installed. (Thanks to Michael Forney.) 1451 1452 A dependency typo in the 'zdump' rule has been fixed. 1453 (Thanks to Andrew Paprocki.) 1454 1455 The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f' 1456 work as specified by POSIX.2-1992 or later; this is portable nowadays. 1457 1458 'make clean' no longer removes 'leapseconds', since it's 1459 host-independent and is part of the distribution. 1460 1461 The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed. 1462 1463 Changes affecting documentation and commentary 1464 1465 tz-link.htm now mentions TC TIMEZONE's draft time zone service protocol 1466 (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle). 1467 1468 Update URLs in tz-link page. Add URLs for Microsoft Windows, since 1469 8.1 introduces tz support. Remove URLs for Tru64 and UnixWare (no 1470 longer maintained) and for old advisories. SOFA now does C. 1471 1472 Release 2013g - 2013-09-30 21:08:26 -0700 1473 1474 Changes affecting current and near-future time stamps 1475 1476 Morocco now observes DST from the last Sunday in March to the last 1477 Sunday in October, not April to September respectively. (Thanks 1478 to Steffen Thorsen.) 1479 1480 Changes affecting 'zic' 1481 1482 'zic' now runs on platforms that lack both hard links and symlinks. 1483 (Thanks to Theo Veenker for reporting the problem, for MinGW.) 1484 Also, fix some bugs on platforms that lack hard links but have symlinks. 1485 1486 'zic -v' again warns that Asia/Tehran has no POSIX environment variable 1487 to predict the far future, fixing a bug introduced in 2013e. 1488 1489 Changes affecting the build procedure 1490 1491 The 'leapseconds' file is again put into the tzdata tarball. 1492 Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to 1493 Matt Burgess and Ian Abbott.) The timestamps of these and other 1494 dependent files in tarballs are adjusted more consistently. 1495 1496 Changes affecting documentation and commentary 1497 1498 The README file is now part of the data tarball as well as the code. 1499 It now states that files are public domain unless otherwise specified. 1500 (Thanks to Andrew Main (Zefram) for asking for clarifications.) 1501 Its details about the 1989 release moved to a place of honor near 1502 the end of NEWS. 1503 1504 1505 Release 2013f - 2013-09-24 23:37:36 -0700 1506 1507 Changes affecting near-future time stamps 1508 1509 Tocantins will very likely not observe DST starting this spring. 1510 (Thanks to Steffen Thorsen.) 1511 1512 Jordan will likely stay at UT +03 indefinitely, and will not fall 1513 back this fall. 1514 1515 Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.) 1516 1517 Changes affecting API 1518 1519 The types of the global variables 'timezone' and 'altzone' (if present) 1520 have been changed back to 'long'. This is required for 'timezone' 1521 by POSIX, and for 'altzone' by common practice, e.g., Solaris 11. 1522 These variables were originally 'long' in the tz code, but were 1523 mistakenly changed to 'time_t' in 1987; nobody reported the 1524 incompatibility until now. The difference matters on x32, where 1525 'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.) 1526 1527 Changes affecting the build procedure 1528 1529 Avoid long strings in leapseconds.awk to work around a mawk bug. 1530 (Thanks to Cyril Baurand.) 1531 1532 Changes affecting documentation and commentary 1533 1534 New file 'NEWS' that contains release notes like this one. 1535 1536 Paraguay's law does not specify DST transition time; 00:00 is customary. 1537 (Thanks to Waldemar Villamayor-Venialbo.) 1538 1539 Minor capitalization fixes. 1540 1541 Changes affecting version-control only 1542 1543 The experimental GitHub repository now contains annotated and 1544 signed tags for recent releases, e.g., '2013e' for Release 2013e. 1545 Releases are tagged starting with 2012e; earlier releases were 1546 done differently, and tags would either not have a simple name or 1547 not exactly match what was released. 1548 1549 'make set-timestamps' is now simpler and a bit more portable. 1550 1551 1552 Release 2013e - 2013-09-19 23:50:04 -0700 1553 1554 Changes affecting near-future time stamps 1555 1556 This year Fiji will start DST on October 27, not October 20. 1557 (Thanks to David Wheeler for the heads-up.) For now, guess that 1558 Fiji will continue to spring forward the Sunday before the fourth 1559 Monday in October. 1560 1561 Changes affecting current and future time zone abbreviations 1562 1563 Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian 1564 time zone abbreviations since 1932. (Thanks to George Ziegler, 1565 Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and 1566 Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura, 1567 Asia/Makassar, and Asia/Pontianak. 1568 1569 Use ART (UT -03, standard time), rather than WARST (also -03, but 1570 daylight saving time) for San Luis, Argentina since 2009. 1571 1572 Changes affecting Godthb time stamps after 2037 if version mismatch 1573 1574 Allow POSIX-like TZ strings where the transition time's hour can 1575 range from -167 through 167, instead of the POSIX-required 0 1576 through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the 1577 new Fiji rules. This is a more-compact way to represent 1578 far-future time stamps for America/Godthab, America/Santiago, 1579 Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem, 1580 Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by 1581 this change. (Derived from a suggestion by Arthur David Olson.) 1582 1583 Allow POSIX-like TZ strings where daylight saving time is in 1584 effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western 1585 Argentina Summer Time all year. This supports a more-compact way 1586 to represent the 2013d data for America/Argentina/San_Luis. 1587 Because of the change for San Luis noted above this change does not 1588 affect the current data. (Thanks to Andrew Main (Zefram) for 1589 suggestions that improved this change.) 1590 1591 Where these two TZ changes take effect, there is a minor extension 1592 to the tz file format in that it allows new values for the 1593 embedded TZ-format string, and the tz file format version number 1594 has therefore been increased from 2 to 3 as a precaution. 1595 Version-2-based client code should continue to work as before for 1596 all time stamps before 2038. Existing version-2-based client code 1597 (tzcode, GNU/Linux, Solaris) has been tested on version-3-format 1598 files, and typically works in practice even for time stamps after 1599 2037; the only known exception is America/Godthab. 1600 1601 Changes affecting time stamps before 1970 1602 1603 Pacific/Johnston is now a link to Pacific/Honolulu. This corrects 1604 some errors before 1947. 1605 1606 Some zones have been turned into links, when they differ from existing 1607 zones only in older data entries that were likely invented or that 1608 differ only in LMT or transitions from LMT. These changes affect 1609 only time stamps before 1943. The affected zones are: 1610 Africa/Juba, America/Anguilla, America/Aruba, America/Dominica, 1611 America/Grenada, America/Guadeloupe, America/Marigot, 1612 America/Montserrat, America/St_Barthelemy, America/St_Kitts, 1613 America/St_Lucia, America/St_Thomas, America/St_Vincent, 1614 America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for 1615 confirming that the old Europe/Vaduz zone was wrong and the new 1616 link is better for WWII-era times.) 1617 1618 Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects 1619 America/Cayman, America/Jamaica and America/Grand_Turk time stamps 1620 from 1890 to 1912. 1621 1622 Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46. 1623 This affects Europe/Zurich time stamps from 1853 to 1894. (Thanks 1624 to Alois Treindl). 1625 1626 Change the date of the circa-1850 Zurich transition from 1849-09-12 1627 to 1853-07-16, overriding Shanks with data from Messerli about 1628 postal and telegraph time in Switzerland. 1629 1630 Changes affecting time zone abbreviations before 1970 1631 1632 For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932, 1633 as Jakarta was called Batavia back then. 1634 1635 Changes affecting API 1636 1637 The 'zic' command now outputs a dummy transition when far-future 1638 data can't be summarized using a TZ string, and uses a 402-year 1639 window rather than a 400-year window. For the current data, this 1640 affects only the Asia/Tehran file. It does not affect any of the 1641 time stamps that this file represents, so zdump outputs the same 1642 information as before. (Thanks to Andrew Main (Zefram).) 1643 1644 The 'date' command has a new '-r' option, which lets you specify 1645 the integer time to display, a la FreeBSD. 1646 1647 The 'tzselect' command has two new options '-c' and '-n', which lets you 1648 select a zone based on latitude and longitude. 1649 1650 The 'zic' command's '-v' option now warns about constructs that 1651 require the new version-3 binary file format. (Thanks to Arthur 1652 David Olson for the suggestion.) 1653 1654 Support for floating-point time_t has been removed. 1655 It was always dicey, and POSIX no longer requires it. 1656 (Thanks to Eric Blake for suggesting to the POSIX committee to 1657 remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy 1658 Heninger, Arthur David Olson, and Alois Treindl, for reporting 1659 bugs and elucidating some of the corners of the old floating-point 1660 implementation.) 1661 1662 The signatures of 'offtime', 'timeoff', and 'gtime' have been 1663 changed back to the old practice of using 'long' to represent UT 1664 offsets. This had been inadvertently and mistakenly changed to 1665 'int_fast32_t'. (Thanks to Christos Zoulas.) 1666 1667 The code avoids undefined behavior on integer overflow in some 1668 more places, including gmtime, localtime, mktime and zdump. 1669 1670 Changes affecting the zdump utility 1671 1672 zdump now outputs "UT" when referring to Universal Time, not "UTC". 1673 "UTC" does not make sense for time stamps that predate the introduction 1674 of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen 1675 for clarifying UT vs UTC.) 1676 1677 Data changes affecting behavior of tzselect and similar programs 1678 1679 Country code BQ is now called the more-common name "Caribbean Netherlands" 1680 rather than the more-official "Bonaire, St Eustatius & Saba". 1681 1682 Remove from zone.tab the names America/Montreal, America/Shiprock, 1683 and Antarctica/South_Pole, as they are equivalent to existing 1684 same-country-code zones for post-1970 time stamps. The data entries for 1685 these names are unchanged, so the names continue to work as before. 1686 1687 Changes affecting code internals 1688 1689 zic -c now runs way faster on 64-bit hosts when given large numbers. 1690 1691 zic now uses vfprintf to avoid allocating and freeing some memory. 1692 1693 tzselect now computes the list of continents from the data, 1694 rather than have it hard-coded. 1695 1696 Minor changes pacify GCC 4.7.3 and GCC 4.8.1. 1697 1698 Changes affecting the build procedure 1699 1700 The 'leapseconds' file is now generated automatically from a 1701 new file 'leap-seconds.list', which is a copy of 1702 <ftp://time.nist.gov/pub/leap-seconds.list>. 1703 A new source file 'leapseconds.awk' implements this. 1704 The goal is simplification of the future maintenance of 'leapseconds'. 1705 1706 When building the 'posix' or 'right' subdirectories, if the 1707 subdirectory would be a copy of the default subdirectory, it is 1708 now made a symbolic link if that is supported. This saves about 1709 2 MB of file system space. 1710 1711 The links America/Shiprock and Antarctica/South_Pole have been 1712 moved to the 'backward' file. This affects only nondefault builds 1713 that omit 'backward'. 1714 1715 Changes affecting version-control only 1716 1717 .gitignore now ignores 'date'. 1718 1719 Changes affecting documentation and commentary 1720 1721 Changes to the 'tzfile' man page 1722 1723 It now mentions that the binary file format may be extended in 1724 future versions by appending data. 1725 1726 It now refers to the 'zdump' and 'zic' man pages. 1727 1728 Changes to the 'zic' man page 1729 1730 It lists conditions that elicit a warning with '-v'. 1731 1732 It says that the behavior is unspecified when duplicate names 1733 are given, or if the source of one link is the target of another. 1734 1735 Its examples are updated to match the latest data. 1736 1737 The definition of white space has been clarified slightly. 1738 (Thanks to Michael Deckers.) 1739 1740 Changes to the 'Theory' file 1741 1742 There is a new section about the accuracy of the tz database, 1743 describing the many ways that errors can creep in, and 1744 explaining why so many of the pre-1970 time stamps are wrong or 1745 misleading (thanks to Steve Allen, Lester Caine, and Garrett 1746 Wollman for discussions that contributed to this). 1747 1748 The 'Theory' file describes LMT better (this follows a 1749 suggestion by Guy Harris). 1750 1751 It refers to the 2013 edition of POSIX rather than the 2004 edition. 1752 1753 It's mentioned that excluding 'backward' should not affect the 1754 other data, and it suggests at least one zone.tab name per 1755 inhabited country (thanks to Stephen Colebourne). 1756 1757 Some longstanding restrictions on names are documented, e.g., 1758 'America/New_York' precludes 'America/New_York/Bronx'. 1759 1760 It gives more reasons for the 1970 cutoff. 1761 1762 It now mentions which time_t variants are supported, such as 1763 signed integer time_t. (Thanks to Paul Goyette for reporting 1764 typos in an experimental version of this change.) 1765 1766 (Thanks to Philip Newton for correcting typos in these changes.) 1767 1768 Documentation and commentary is more careful to distinguish UT in 1769 general from UTC in particular. (Thanks to Steve Allen.) 1770 1771 Add a better source for the Zurich 1894 transition. 1772 (Thanks to Pierre-Yves Berger.) 1773 1774 Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.) 1775 1776 1777 Release 2013d - 2013-07-05 07:38:01 -0700 1778 1779 Changes affecting future time stamps: 1780 1781 Morocco's midsummer transitions this year are July 7 and August 10, 1782 not July 9 and August 8. (Thanks to Andrew Paprocki.) 1783 1784 Israel now falls back on the last Sunday of October. 1785 (Thanks to Ephraim Silverberg.) 1786 1787 Changes affecting past time stamps: 1788 1789 Specify Jerusalem's location more precisely; this changes the pre-1880 1790 times by 2 s. 1791 1792 Changing affecting metadata only: 1793 1794 Fix typos in the entries for country codes BQ and SX. 1795 1796 Changes affecting code: 1797 1798 Rework the code to fix a bug with handling Australia/Macquarie on 1799 32-bit hosts (thanks to Arthur David Olson). 1800 1801 Port to platforms like NetBSD, where time_t can be wider than long. 1802 1803 Add support for testing time_t types other than the system's. 1804 Run 'make check_time_t_alternatives' to try this out. 1805 Currently, the tests fail for unsigned time_t; 1806 this should get fixed at some point. 1807 1808 Changes affecting documentation and commentary: 1809 1810 Deemphasize the significance of national borders. 1811 1812 Update the zdump man page. 1813 1814 Remove obsolete NOID comment (thanks to Denis Excoffier). 1815 1816 Update several URLs and comments in the web pages. 1817 1818 Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler). 1819 1820 Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka). 1821 1822 1823 Release 2013c - 2013-04-19 16:17:40 -0700 1824 1825 Changes affecting current and future time stamps: 1826 1827 Palestine observed DST starting March 29, 2013. (Thanks to 1828 Steffen Thorsen.) From 2013 on, Gaza and Hebron both observe DST, 1829 with the predicted rules being the last Thursday in March at 24:00 1830 to the first Friday on or after September 21 at 01:00. 1831 1832 Assume that the recent change to Paraguay's DST rules is permanent, 1833 by moving the end of DST to the 4th Sunday in March every year. 1834 (Thanks to Carlos Ral Perasso.) 1835 1836 Changes affecting past time stamps: 1837 1838 Fix some historical data for Palestine to agree with that of 1839 timeanddate.com, as follows: 1840 1841 The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not 1842 00:00 Apr 1. 1843 1844 The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not 1845 02:00. 1846 1847 The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27. 1848 1849 The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2. 1850 1851 The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01. 1852 1853 The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00. 1854 1855 Fix times of habitation for Macquarie to agree with the Tasmania 1856 Parks & Wildlife Service history, which indicates that permanent 1857 habitation was 1899-1919 and 1948 on. 1858 1859 Changing affecting metadata only: 1860 1861 Macquarie Island is politically part of Australia, not Antarctica. 1862 (Thanks to Tobias Conradi.) 1863 1864 Sort Macquarie more-consistently with other parts of Australia. 1865 (Thanks to Tim Parenti.) 1866 1867 1868 Release 2013b - 2013-03-10 22:33:40 -0700 1869 1870 Changes affecting current and future time stamps: 1871 1872 Haiti uses US daylight-saving rules this year, and presumably future years. 1873 This changes time stamps starting today. (Thanks to Steffen Thorsen.) 1874 1875 Paraguay will end DST on March 24 this year. 1876 (Thanks to Steffen Thorsen.) For now, assume it's just this year. 1877 1878 Morocco does not observe DST during Ramadan; 1879 try to predict Ramadan in Morocco as best we can. 1880 (Thanks to Erik Homoet for the heads-up.) 1881 1882 Changes affecting commentary: 1883 1884 Update URLs in tz-link page. Add URLs for webOS, BB10, iOS. 1885 Update URL for Solaris. Mention Internet RFC 6557. 1886 Update Internet RFCs 2445->5545, 2822->5322. 1887 Switch from FTP to HTTP for Internet RFCs. 1888 1889 1890 Release 2013a - 2013-02-27 09:20:35 -0800 1891 1892 Change affecting binary data format: 1893 1894 The zone offset at the end of version-2-format zone files is now 1895 allowed to be 24:00, as per POSIX.1-2008. (Thanks to Arthur David Olson.) 1896 1897 Changes affecting current and future time stamps: 1898 1899 Chile's 2013 rules, and we guess rules for 2014 and later, will be 1900 the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC. 1901 (Thanks to Steffen Thorsen and Robert Elz.) 1902 1903 New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen. 1904 (Thanks to Tobias Conradi and Arthur David Olson.) 1905 1906 Many changes affect historical time stamps before 1940. 1907 These were deduced from: Milne J. Civil time. Geogr J. 1899 1908 Feb;13(2):173-94 <http://www.jstor.org/stable/1774359>. 1909 1910 Changes affecting the code: 1911 1912 Fix zic bug that mishandled Egypt's 2010 changes (this also affected 1913 the data). (Thanks to Arthur David Olson.) 1914 1915 Fix localtime bug when time_t is unsigned and data files were generated 1916 by a signed time_t system. (Thanks to Doug Bailey for reporting and 1917 to Arthur David Olson for fixing.) 1918 1919 Allow the email address for bug reports to be set by the packager. 1920 The default is tz (a] iana.org, as before. (Thanks to Joseph S. Myers.) 1921 1922 Update HTML checking to be compatible with Ubuntu 12.10. 1923 1924 Check that files are a safe subset of ASCII. At some point we may 1925 relax this requirement to a safe subset of UTF-8. Without the 1926 check, some non-UTF-8 encodings were leaking into the distribution. 1927 1928 Commentary changes: 1929 1930 Restore a comment about copyright notices that was inadvertently deleted. 1931 (Thanks to Arthur David Olson.) 1932 1933 Improve the commentary about which districts observe what times 1934 in Russia. (Thanks to Oscar van Vlijmen and Arthur David Olson). 1935 1936 Add web page links to tz.js. 1937 1938 Add "Run by the Monkeys" to tz-art. (Thanks to Arthur David Olson.) 1939 1940 1941 Release 2012j - 2012-11-12 18:34:49 -0800 1942 1943 Libya moved to CET this weekend, but with DST planned next year. 1944 (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.) 1945 1946 Signatures now have the extension .asc, not .sign, as that's more 1947 standard. (Thanks to Phil Pennock.) 1948 1949 The output of 'zdump --version', and of 'zic --version', now 1950 uses a format that is more typical for --version. 1951 (Thanks to Joseph S. Myers.) 1952 1953 The output of 'tzselect --help', 'zdump --help', and 'zic --help' 1954 now uses tz (a] iana.org rather than the old elsie address. 1955 1956 zic -v now complains about abbreviations that are less than 3 1957 or more than 6 characters, as per Posix. Formerly, it checked 1958 for abbreviations that were more than 3. 1959 1960 'make public' no longer puts its temporary directory under /tmp, 1961 and uses the just-built zic rather than the system zic. 1962 1963 Various fixes to documentation and commentary. 1964 1965 1966 Release 2012i - 2012-11-03 12:57:09 -0700 1967 1968 Cuba switches from DST tomorrow at 01:00. (Thanks to Steffen Thorsen.) 1969 1970 Linker flags can now be specified via LDFLAGS. 1971 AWK now defaults to 'awk', not 'nawk'. 1972 The shell in tzselect now defaults to /bin/bash, but this can 1973 be overridden by specifying KSHELL. 1974 The main web page now mentions the unofficial GitHub repository. 1975 (Thanks to Mike Frysinger.) 1976 1977 Tarball signatures can now be built by running 'make signatures'. 1978 There are also new makefile rules 'tarballs', 'check_public', and 1979 separate makefile rules for each tarball and signature file. 1980 A few makefile rules are now more portable to strict POSIX. 1981 1982 The main web page now lists the canonical IANA URL. 1983 1984 1985 Release 2012h - 2012-10-26 22:49:10 -0700 1986 1987 Bahia no longer has DST. (Thanks to Kelley Cook.) 1988 1989 Tocantins has DST. (Thanks to Rodrigo Severo.) 1990 1991 Israel has new DST rules next year. (Thanks to Ephraim Silverberg.) 1992 1993 Jordan stays on DST this winter. (Thanks to Steffen Thorsen.) 1994 1995 Web page updates. 1996 1997 More C modernization, except that at Arthur David Olson's suggestion 1998 the instances of 'register' were kept. 1999 2000 2001 Release 2012g - 2012-10-17 20:59:45 -0700 2002 2003 Samoa fall 2012 and later. (Thanks to Nicholas Pereira and Robert Elz.) 2004 2005 Palestine fall 2012. (Thanks to Steffen Thorsen.) 2006 2007 Assume C89. 2008 2009 To attack the version-number problem, this release ships the file 2010 'Makefile' (which contains the release number) in both the tzcode and 2011 the tzdata tarballs. The two Makefiles are identical, and should be 2012 identical in any matching pair of tarballs, so it shouldn't matter 2013 which order you extract the tarballs. Perhaps we can come up with a 2014 better version-number scheme at some point; this scheme does have the 2015 virtue of not adding more files. 2016 2017 2018 Release 2012f - 2012-09-12 23:17:03 -0700 2019 2020 * australasia (Pacific/Fiji): Fiji DST is October 21 through January 2021 20 this year. (Thanks to Steffen Thorsen.) 2022 2023 2024 Release 2012e - 2012-08-02 20:44:55 -0700 2025 2026 * australasia (Pacific/Fakaofo): Tokelau is UT +13, not +14. 2027 (Thanks to Steffen Thorsen.) 2028 2029 * Use a single version number for both code and data. 2030 2031 * .gitignore: New file. 2032 2033 * Remove trailing white space. 2034 2035 2036 Release code2012c-data2012d - 2012-07-19 16:35:33 -0700 2037 2038 Changes for Morocco's time stamps, which take effect in a couple of 2039 hours, along with infrastructure changes to accommodate how the tz 2040 code and data are released on IANA. 2041 2042 2043 Release data2012c - 2012-03-27 12:17:25 -0400 2044 2045 africa 2046 Summer time changes for Morocco (to start late April 2012) 2047 2048 asia 2049 Changes for 2012 for Gaza & the West Bank (Hebron) and Syria 2050 2051 northamerica 2052 Haiti following US/Canada rules for 2012 (and we're assuming, 2053 for now anyway, for the future). 2054 2055 2056 Release 2012b - 2012-03-02 12:29:15 +0700 2057 2058 There is just one change to tzcode2012b (compared with 2012a): 2059 the Makefile that was accidentally included with 2012a has been 2060 replaced with the version that should have been there, which is 2061 identical with the previous version (from tzcode2011i). 2062 2063 There are just two changes in tzdata2012b compared with 2012a. 2064 2065 Most significantly, summer time in Cuba has been delayed 3 weeks 2066 (now starts April 1 rather than March 11). Since Mar 11 (the old start 2067 date, as listed in 2012a) is just a little over a week away, this 2068 change is urgent. 2069 2070 Less importantly, an excess tab in one of the changes in zone.tab 2071 in 2012a has been removed. 2072 2073 2074 Release 2012a - 2012-03-01 18:28:10 +0700 2075 2076 The changes in tzcode2012a (compared to the previous version, 2011i) 2077 are entirely to the README and tz-art.htm and tz-link.htm files, if 2078 none of those concern you, you can ignore the code update. The changes 2079 reflect the changed addresses for the mailing list and the code and 2080 data distribution points & methods (and a link to DateTime::TimeZone::Tzfile 2081 has been added to tz-link.htm). 2082 2083 In tzdata2012a (compared to the previous release, which was 2011n) 2084 the major changes are: 2085 Chile 2011/2012 and 2012/2013 summer time date adjustments. 2086 Falkland Islands onto permanent summer time (we're assuming for the 2087 foreseeable future, though 2012 is all we're fairly certain of.) 2088 Armenia has abolished Summer Time. 2089 Tokelau jumped the International Date Line back last December 2090 (just the same as their near neighbour, Samoa). 2091 America/Creston is a new zone for a small area of British Columbia 2092 There will be a leapsecond 2012-06-30 23:59:60 UTC. 2093 2094 Other minor changes are: 2095 Corrections to 1918 Canadian summer time end dates. 2096 Updated URL for UK time zone history (in comments) 2097 A few typos in Le Corre's list of free French place names (comments) 2098 2099 2100 Release data2011n - 2011-10-30 14:57:54 +0700 2101 2102 There are three changes of note - most urgently, Cuba (America/Havana) 2103 has extended summer time by two weeks, now to end on Nov 13, rather than 2104 the (already past) Oct 30. Second, the Pridnestrovian Moldavian Republic 2105 (Europe/Tiraspol) decided not to split from the rest of Moldova after 2106 all, and consequently that zone has been removed (again) and reinstated 2107 in the "backward" file as a link to Europe/Chisinau. And third, the 2108 end date for Fiji's summer time this summer was moved forward from the 2109 earlier planned Feb 26, to Jan 22. 2110 2111 Apart from that, Moldova (MD) returns to a single entry in zone.tab 2112 (and the incorrect syntax that was in the 2011m version of that file 2113 is so fixed - it would have been fixed in a different way had this 2114 change not happened - that's the "missing" sccs version id). 2115 2116 2117 Release data2011m - 2011-10-24 21:42:16 +0700 2118 2119 In particular, the typos in comments in the data (2011-11-17 should have 2120 been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that 2121 Tim Parenti noted) have been fixed, and the change for Ukraine has been 2122 made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to 2123 Tim Parenti, and also Denys Gavrysh) 2124 2125 In addition, I added Europe/Tiraspol to zone.tab. 2126 2127 This time, all the files have new version numbers... (including the files 2128 otherwise unchanged in 2011m that were changed in 2011l but didn't get new 2129 version numbers there...) 2130 2131 2132 Release data2011l - 2011-10-10 11:15:43 +0700 2133 2134 There are just 2 changes that cause different generated tzdata files from 2135 zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil 2136 is included, but commented out. Compared with the diff I sent out last week, 2137 this version also includes attributions for the sources for the changes 2138 (in much the same format as ado used, but the html tags have not been 2139 checked, verified, or used in any way at all, so if there are errors there, 2140 please let me know.) 2141 2142 2143 Release data2011k - 2011-09-20 17:54:03 -0400 2144 2145 [not summarized] 2146 2147 2148 Release data2011j - 2011-09-12 09:22:49 -0400 2149 2150 (contemporary changes for Samoa; past changes for Kenya, Uganda, and 2151 Tanzania); there are also two spelling corrections to comments in 2152 the australasia file (with thanks to Christos Zoulas). 2153 2154 2155 Release 2011i - 2011-08-29 05:56:32 -0400 2156 2157 [not summarized] 2158 2159 2160 Release data2011h - 2011-06-15 18:41:48 -0400 2161 2162 Russia and Curaao changes 2163 2164 2165 Release 2011g - 2011-04-25 09:07:22 -0400 2166 2167 update the rules for Egypt to reflect its abandonment of DST this year 2168 2169 2170 Release 2011f - 2011-04-06 17:14:53 -0400 2171 2172 [not summarized] 2173 2174 2175 Release 2011e - 2011-03-31 16:04:38 -0400 2176 2177 Morocco, Chile, and tz-link changes 2178 2179 2180 Release 2011d - 2011-03-14 09:18:01 -0400 2181 2182 changes that impact present-day time stamps in Cuba, Samoa, and Turkey 2183 2184 2185 Release 2011c - 2011-03-07 09:30:09 -0500 2186 2187 These do affect current time stamps in Chile and Annette Island, Canada. 2188 2189 2190 Release 2011b - 2011-02-07 08:44:50 -0500 2191 2192 [not summarized] 2193 2194 2195 Release 2011a - 2011-01-24 10:30:16 -0500 2196 2197 [not summarized] 2198 2199 2200 Release data2010o - 2010-11-01 09:18:23 -0400 2201 2202 change to the end of DST in Fiji in 2011 2203 2204 2205 Release 2010n - 2010-10-25 08:19:17 -0400 2206 2207 [not summarized] 2208 2209 2210 Release 2010m - 2010-09-27 09:24:48 -0400 2211 2212 Hong Kong, Vostok, and zic.c changes 2213 2214 2215 Release 2010l - 2010-08-16 06:57:25 -0400 2216 2217 [not summarized] 2218 2219 2220 Release 2010k - 2010-07-26 10:42:27 -0400 2221 2222 [not summarized] 2223 2224 2225 Release 2010j - 2010-05-10 09:07:48 -0400 2226 2227 changes for Baha de Banderas and for version naming 2228 2229 2230 Release data2010i - 2010-04-16 18:50:45 -0400 2231 2232 the end of DST in Morocco on 2010-08-08 2233 2234 2235 Release data2010h - 2010-04-05 09:58:56 -0400 2236 2237 [not summarized] 2238 2239 2240 Release data2010g - 2010-03-24 11:14:53 -0400 2241 2242 [not summarized] 2243 2244 2245 Release 2010f - 2010-03-22 09:45:46 -0400 2246 2247 [not summarized] 2248 2249 2250 Release data2010e - 2010-03-08 14:24:27 -0500 2251 2252 corrects the Dhaka bug found by Danvin Ruangchan 2253 2254 2255 Release data2010d - 2010-03-06 07:26:01 -0500 2256 2257 [not summarized] 2258 2259 2260 Release 2010c - 2010-03-01 09:20:58 -0500 2261 2262 changes including KRE's suggestion for earlier initialization of 2263 "goahead" and "goback" structure elements 2264 2265 2266 Release code2010a - 2010-02-16 10:40:04 -0500 2267 2268 [not summarized] 2269 2270 2271 Release data2010b - 2010-01-20 12:37:01 -0500 2272 2273 Mexico changes 2274 2275 2276 Release data2010a - 2010-01-18 08:30:04 -0500 2277 2278 changes to Dhaka 2279 2280 2281 Release data2009u - 2009-12-26 08:32:28 -0500 2282 2283 changes to DST in Bangladesh 2284 2285 2286 Release 2009t - 2009-12-21 13:24:27 -0500 2287 2288 [not summarized] 2289 2290 2291 Release data2009s - 2009-11-14 10:26:32 -0500 2292 2293 (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change 2294 2295 2296 Release 2009r - 2009-11-09 10:10:31 -0500 2297 2298 "antarctica" and "tz-link.htm" changes 2299 2300 2301 Release 2009q - 2009-11-02 09:12:40 -0500 2302 2303 with two corrections as reported by Eric Muller and Philip Newton 2304 2305 2306 Release data2009p - 2009-10-23 15:05:27 -0400 2307 2308 Argentina (including San Luis) changes (with the correction from 2309 Mariano Absatz) 2310 2311 2312 Release data2009o - 2009-10-14 16:49:38 -0400 2313 2314 Samoa (commentary only), Pakistan, and Bangladesh changes 2315 2316 2317 Release data2009n - 2009-09-22 15:13:38 -0400 2318 2319 added commentary for Argentina and a change to the end of DST in 2320 2009 in Pakistan 2321 2322 2323 Release data2009m - 2009-09-03 10:23:43 -0400 2324 2325 Samoa and Palestine changes 2326 2327 2328 Release data2009l - 2009-08-14 09:13:07 -0400 2329 2330 Samoa (comments only) and Egypt 2331 2332 2333 Release 2009k - 2009-07-20 09:46:08 -0400 2334 2335 [not summarized] 2336 2337 2338 Release data2009j - 2009-06-15 06:43:59 -0400 2339 2340 Bangladesh change (with a short turnaround since the DST change is 2341 impending) 2342 2343 2344 Release 2009i - 2009-06-08 09:21:22 -0400 2345 2346 updating for DST in Bangladesh this year 2347 2348 2349 Release 2009h - 2009-05-26 09:19:14 -0400 2350 2351 [not summarized] 2352 2353 2354 Release data2009g - 2009-04-20 16:34:07 -0400 2355 2356 Cairo 2357 2358 2359 Release data2009f - 2009-04-10 11:00:52 -0400 2360 2361 correct DST in Pakistan 2362 2363 2364 Release 2009e - 2009-04-06 09:08:11 -0400 2365 2366 [not summarized] 2367 2368 2369 Release 2009d - 2009-03-23 09:38:12 -0400 2370 2371 Morocco, Tunisia, Argentina, and American Astronomical Society changes 2372 2373 2374 Release data2009c - 2009-03-16 09:47:51 -0400 2375 2376 change to the start of Cuban DST 2377 2378 2379 Release 2009b - 2009-02-09 11:15:22 -0500 2380 2381 [not summarized] 2382 2383 2384 Release 2009a - 2009-01-21 10:09:39 -0500 2385 2386 [not summarized] 2387 2388 2389 Release data2008i - 2008-10-21 12:10:25 -0400 2390 2391 southamerica and zone.tab files, with Argentina DST rule changes and 2392 United States zone reordering and recommenting 2393 2394 2395 Release 2008h - 2008-10-13 07:33:56 -0400 2396 2397 [not summarized] 2398 2399 2400 Release 2008g - 2008-10-06 09:03:18 -0400 2401 2402 Fix a broken HTML anchor and update Brazil's DST transitions; 2403 there's also a slight reordering of information in tz-art.htm. 2404 2405 2406 Release data2008f - 2008-09-09 22:33:26 -0400 2407 2408 [not summarized] 2409 2410 2411 Release 2008e - 2008-07-28 14:11:17 -0400 2412 2413 changes by Arthur David Olson and Jesper Nrgaard Welen 2414 2415 2416 Release data2008d - 2008-07-07 09:51:38 -0400 2417 2418 changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo 2419 2420 2421 Release data2008c - 2008-05-19 17:48:03 -0400 2422 2423 Pakistan, Morocco, and Mongolia 2424 2425 2426 Release data2008b - 2008-03-24 08:30:59 -0400 2427 2428 including renaming Asia/Calcutta to Asia/Kolkata, with a backward 2429 link provided 2430 2431 2432 Release 2008a - 2008-03-08 05:42:16 -0500 2433 2434 [not summarized] 2435 2436 2437 Release 2007k - 2007-12-31 10:25:22 -0500 2438 2439 most importantly, changes to the "southamerica" file based on 2440 Argentina's readoption of daylight saving time 2441 2442 2443 Release 2007j - 2007-12-03 09:51:01 -0500 2444 2445 1. eliminate the "P" (parameter) macro; 2446 2447 2. the "noncontroversial" changes circulated on the time zone 2448 mailing list (less the changes to "logwtmp.c"); 2449 2450 3. eliminate "too many transition" errors when "min" is used in time 2451 zone rules; 2452 2453 4. changes by Paul Eggert (including updated information for Venezuela). 2454 2455 2456 Release data2007i - 2007-10-30 10:28:11 -0400 2457 2458 changes for Cuba and Syria 2459 2460 2461 Release 2007h - 2007-10-01 10:05:51 -0400 2462 2463 changes by Paul Eggert, as well as an updated link to the ICU 2464 project in tz-link.htm 2465 2466 2467 Release 2007g - 2007-08-20 10:47:59 -0400 2468 2469 changes by Paul Eggert 2470 2471 The "leapseconds" file has been updated to incorporate the most 2472 recent International Earth Rotation and Reference Systems Service 2473 (IERS) bulletin. 2474 2475 There's an addition to tz-art.htm regarding the television show "Medium". 2476 2477 2478 Release 2007f - 2007-05-07 10:46:46 -0400 2479 2480 changes by Paul Eggert (including Haiti, Turks and Caicos, and New 2481 Zealand) 2482 2483 changes to zic.c to allow hour values greater than 24 (along with 2484 Paul's improved time value overflow checking) 2485 2486 2487 Release 2007e - 2007-04-02 10:11:52 -0400 2488 2489 Syria and Honduras changes by Paul Eggert 2490 2491 zic.c variable renaming changes by Arthur David Olson 2492 2493 2494 Release 2007d - 2007-03-20 08:48:30 -0400 2495 2496 changes by Paul Eggert 2497 2498 the elimination of white space at the ends of lines 2499 2500 2501 Release 2007c - 2007-02-26 09:09:37 -0500 2502 2503 changes by Paul Eggert 2504 2505 2506 Release 2007b - 2007-02-12 09:34:20 -0500 2507 2508 Paul Eggert's proposed change to the quotation handling logic in zic.c. 2509 2510 changes to the commentary in "leapseconds" reflecting the IERS 2511 announcement that there is to be no positive leap second at the end 2512 of June 2007. 2513 2514 2515 Release 2007a - 2007-01-08 12:28:29 -0500 2516 2517 changes by Paul Eggert 2518 2519 Derick Rethan's Asmara change 2520 2521 Oscar van Vlijmen's Easter Island local mean time change 2522 2523 symbolic link changes 2524 2525 2526 Release 2006p - 2006-11-27 08:54:27 -0500 2527 2528 changes by Paul Eggert 2529 2530 2531 Release 2006o - 2006-11-06 09:18:07 -0500 2532 2533 changes by Paul Eggert 2534 2535 2536 Release 2006n - 2006-10-10 11:32:06 -0400 2537 2538 changes by Paul Eggert 2539 2540 2541 Release 2006m - 2006-10-02 15:32:35 -0400 2542 2543 changes for Uruguay, Palestine, and Egypt by Paul Eggert 2544 2545 (minimalist) changes to zic.8 to clarify "until" information 2546 2547 2548 Release data2006l - 2006-09-18 12:58:11 -0400 2549 2550 Paul's best-effort work on this coming weekend's Egypt time change 2551 2552 2553 Release 2006k - 2006-08-28 12:19:09 -0400 2554 2555 changes by Paul Eggert 2556 2557 2558 Release 2006j - 2006-08-21 09:56:32 -0400 2559 2560 changes by Paul Eggert 2561 2562 2563 Release code2006i - 2006-08-07 12:30:55 -0400 2564 2565 localtime.c fixes 2566 2567 Ken Pizzini's conversion script 2568 2569 2570 Release code2006h - 2006-07-24 09:19:37 -0400 2571 2572 adds public domain notices to four files 2573 2574 includes a fix for transition times being off by a second 2575 2576 adds a new recording to the "arts" file (information courtesy Colin Bowern) 2577 2578 2579 Release 2006g - 2006-05-08 17:18:09 -0400 2580 2581 northamerica changes by Paul Eggert 2582 2583 2584 Release 2006f - 2006-05-01 11:46:00 -0400 2585 2586 a missing version number problem is fixed (with thanks to Bradley 2587 White for catching the problem) 2588 2589 2590 Release 2006d - 2006-04-17 14:33:43 -0400 2591 2592 changes by Paul Eggert 2593 2594 added new items to tz-arts.htm that were found by Paul 2595 2596 2597 Release 2006c - 2006-04-03 10:09:32 -0400 2598 2599 two sets of data changes by Paul Eggert 2600 2601 a fencepost error fix in zic.c 2602 2603 changes to zic.c and the "europe" file to minimize differences 2604 between output produced by the old 32-bit zic and the new 64-bit 2605 version 2606 2607 2608 Release 2006b - 2006-02-20 10:08:18 -0500 2609 [tz32code2006b + tz64code2006b + tzdata2006b] 2610 2611 64-bit code 2612 2613 All SCCS IDs were bumped to "8.1" for this release. 2614 2615 2616 Release 2006a - 2006-01-30 08:59:31 -0500 2617 2618 changes by Paul Eggert (in particular, Indiana time zone moves) 2619 2620 an addition to the zic manual page to describe how special-case 2621 transitions are handled 2622 2623 2624 Release 2005r - 2005-12-27 09:27:13 -0500 2625 2626 Canadian changes by Paul Eggert 2627 2628 They also add "<pre>" directives to time zone data files and reflect 2629 changes to warning message logic in "zdump.c" (but with calls to 2630 "gettext" kept unbundled at the suggestion of Ken Pizzini). 2631 2632 2633 Release 2005q - 2005-12-13 09:17:09 -0500 2634 2635 Nothing earth-shaking here: 2636 1. Electronic mail addresses have been removed. 2637 2. Casts of the return value of exit have been removed. 2638 3. Casts of the argument of is.* macros have been added. 2639 4. Indentation in one section of zic.c has been fixed. 2640 5. References to dead URLs in the data files have been dealt with. 2641 2642 2643 Release 2005p - 2005-12-05 10:30:53 -0500 2644 2645 "systemv", "tz-link.htm", and "zdump.c" changes 2646 (less the casts of arguments to the is* macros) 2647 2648 2649 Release 2005o - 2005-11-28 10:55:26 -0500 2650 2651 Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert 2652 2653 zdump.c lint fixes by Arthur David Olson 2654 2655 2656 Release 2005n - 2005-10-03 09:44:09 -0400 2657 2658 changes by Paul Eggert (both the Uruguay changes and the Kyrgyzstan 2659 et al. changes) 2660 2661 2662 Release 2005m - 2005-08-29 12:15:40 -0400 2663 2664 changes by Paul Eggert (with a small tweak to the tz-art change) 2665 2666 a declaration of an unused variable has been removed from zdump.c 2667 2668 2669 Release 2005l - 2005-08-22 12:06:39 -0400 2670 2671 changes by Paul Eggert 2672 2673 overflow/underflow checks by Arthur David Olson, minus changes to 2674 the "Theory" file about the pending addition of 64-bit data (I grow 2675 less confident of the changes being accepted with each passing day, 2676 and the changes no longer increase the data files nine-fold--there's 2677 less than a doubling in size by my local Sun's reckoning) 2678 2679 2680 Release 2005k - 2005-07-14 14:14:24 -0400 2681 2682 The "leapseconds" file has been edited to reflect the recently 2683 announced leap second at the end of 2005. 2684 2685 I've also deleted electronic mail addresses from the files as an 2686 anti-spam measure. 2687 2688 2689 Release 2005j - 2005-06-13 14:34:13 -0400 2690 2691 These reflect changes to limit the length of time zone abbreviations 2692 and the characters used in those abbreviations. 2693 2694 There are also changes to handle POSIX-style "quoted" time zone 2695 environment variables. 2696 2697 The changes were circulated on the time zone mailing list; the only 2698 change since then was the removal of a couple of minimum-length of 2699 abbreviation checks. 2700 2701 2702 Release data2005i - 2005-04-21 15:04:16 -0400 2703 2704 changes (most importantly to Nicaragua and Haiti) by Paul Eggert 2705 2706 2707 Release 2005h - 2005-04-04 11:24:47 -0400 2708 2709 changes by Paul Eggert 2710 2711 minor changes to Makefile and zdump.c to produce more useful output 2712 when doing a "make typecheck" 2713 2714 2715 Release 2005g - 2005-03-14 10:11:21 -0500 2716 2717 changes by Paul Eggert (a change to current DST rules in Uruguay and 2718 an update to a link to time zone software) 2719 2720 2721 Release 2005f - 2005-03-01 08:45:32 -0500 2722 2723 data and documentation changes by Paul Eggert 2724 2725 2726 Release 2005e - 2005-02-10 15:59:44 -0500 2727 2728 [not summarized] 2729 2730 2731 Release code2005d - 2005-01-31 09:21:47 -0500 2732 2733 make zic complain about links to links if the -v flag is used 2734 2735 have "make public" do more code checking 2736 2737 add an include to "localtime.c" for the benefit of gcc systems 2738 2739 2740 Release 2005c - 2005-01-17 18:36:29 -0500 2741 2742 get better results when mktime runs on a system where time_t is double 2743 2744 changes to the data files (most importantly to Paraguay) 2745 2746 2747 Release 2005b - 2005-01-10 09:19:54 -0500 2748 2749 Get localtime and gmtime working on systems with exotic time_t types. 2750 2751 Update the leap second commentary in the "leapseconds" file. 2752 2753 2754 Release 2005a - 2005-01-01 13:13:44 -0500 2755 2756 [not summarized] 2757 2758 2759 Release code2004i - 2004-12-14 13:42:58 -0500 2760 2761 Deal with systems where time_t is unsigned. 2762 2763 2764 Release code2004h - 2004-12-07 11:40:18 -0500 2765 2766 64-bit-time_t changes 2767 2768 2769 Release 2004g - 2004-11-02 09:06:01 -0500 2770 2771 update to Cuba (taking effect this weekend) 2772 2773 other changes by Paul Eggert 2774 2775 correction of the spelling of Oslo 2776 2777 changed versions of difftime.c and private.h 2778 2779 2780 Release code2004f - 2004-10-21 10:25:22 -0400 2781 2782 Cope with wide-ranging tm_year values. 2783 2784 2785 Release 2004e - 2004-10-11 14:47:21 -0400 2786 2787 Brazil/Argentina/Israel changes by Paul Eggert 2788 2789 changes to tz-link.htm by Paul 2790 2791 one small fix to Makefile 2792 2793 2794 Release 2004d - 2004-09-22 08:27:29 -0400 2795 2796 Avoid overflow problems when TM_YEAR_BASE is added to an integer. 2797 2798 2799 Release 2004c - 2004-08-11 12:06:26 -0400 2800 2801 asctime-related changes 2802 2803 (variants of) some of the documentation changes suggested by Paul Eggert 2804 2805 2806 Release 2004b - 2004-07-19 14:33:35 -0400 2807 2808 data changes by Paul Eggert - most importantly, updates for Argentina 2809 2810 2811 Release 2004a - 2004-05-27 12:00:47 -0400 2812 2813 changes by Paul Eggert 2814 2815 Handle DST transitions that occur at the end of a month in some 2816 years but at the start of the following month in other years. 2817 2818 Add a copy of the correspondence that's the basis for claims about 2819 DST in the Navajo Nation. 2820 2821 2822 Release 2003e - 2003-12-15 09:36:47 -0500 2823 2824 changes by Arthur David Olson (primarily code changes) 2825 2826 changes by Paul Eggert (primarily data changes) 2827 2828 minor changes to "Makefile" and "northamerica" (in the latter case, 2829 optimization of the "Toronto" rules) 2830 2831 2832 Release 2003d - 2003-10-06 09:34:44 -0400 2833 2834 changes by Paul Eggert 2835 2836 2837 Release 2003c - 2003-09-16 10:47:05 -0400 2838 2839 Fix bad returns in zic.c's inleap function. 2840 Thanks to Bradley White for catching the problem! 2841 2842 2843 Release 2003b - 2003-09-16 07:13:44 -0400 2844 2845 Add a "--version" option (and documentation) to the zic and zdump commands. 2846 2847 changes to overflow/underflow checking in zic 2848 2849 a localtime typo fix. 2850 2851 Update the leapseconds and tz-art.htm files. 2852 2853 2854 Release 2003a - 2003-03-24 09:30:54 -0500 2855 2856 changes by Paul Eggert 2857 2858 a few additions and modifications to the tz-art.htm file 2859 2860 2861 Release 2002d - 2002-10-15 13:12:42 -0400 2862 2863 changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab 2864 2865 There's also a new time zone quote in "tz-art.htm". 2866 2867 2868 Release 2002c - 2002-04-04 11:55:20 -0500 2869 2870 changes by Paul Eggert 2871 2872 Change zic.c to avoid creating symlinks to files that don't exist. 2873 2874 2875 Release 2002b - 2002-01-28 12:56:03 -0500 2876 2877 [These change notes are for Release 2002a, which was corrupted. 2878 2002b was a corrected version of 2002a.] 2879 2880 changes by Paul Eggert 2881 2882 Update the "leapseconds" file to note that there'll be no leap 2883 second at the end of June, 2002. 2884 2885 Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone. 2886 2887 Change to "difftime.c" to avoid sizeof problems. 2888 2889 2890 Release 2001d - 2001-10-09 13:31:32 -0400 2891 2892 changes by Paul Eggert 2893 2894 2895 Release 2001c - 2001-06-05 13:59:55 -0400 2896 2897 changes by Paul Eggert and Andrew Brown 2898 2899 2900 Release 2001b - 2001-04-05 16:44:38 -0400 2901 2902 changes by Paul Eggert (modulo jnorgard's typo fix) 2903 2904 tz-art.htm has been HTMLified. 2905 2906 2907 Release 2001a - 2001-03-13 12:57:44 -0500 2908 2909 changes by Paul Eggert 2910 2911 An addition to the "leapseconds" file: comments with the text of the 2912 latest IERS leap second notice. 2913 2914 Trailing white space has been removed from data file lines, and 2915 repeated spaces in "Rule Jordan" lines in the "asia" file have been 2916 converted to tabs. 2917 2918 2919 Release 2000h - 2000-12-14 15:33:38 -0500 2920 2921 changes by Paul Eggert 2922 2923 one typo fix in the "art" file 2924 2925 With providence, this is the last update of the millennium. 2926 2927 2928 Release 2000g - 2000-10-10 11:35:22 -0400 2929 2930 changes by Paul Eggert 2931 2932 correction of John Mackin's name submitted by Robert Elz 2933 2934 Garry Shandling's Daylight Saving Time joke (!?!) from the recent 2935 Emmy Awards broadcast. 2936 2937 2938 Release 2000f - 2000-08-10 09:31:58 -0400 2939 2940 changes by Paul Eggert 2941 2942 Added information in "tz-art.htm" on a Seinfeld reference to DST. 2943 2944 Error checking and messages in the "yearistype" script have been 2945 improved. 2946 2947 2948 Release 2000e - 2000-07-31 09:27:54 -0400 2949 2950 data changes by Paul Eggert 2951 2952 a change to the default value of the defined constant HAVE_STRERROR 2953 2954 the addition of a Dave Barry quote on DST to the tz-arts file 2955 2956 2957 Release 2000d - 2000-04-20 15:43:04 -0400 2958 2959 changes to the documentation and code of strftime for C99 conformance 2960 2961 a bug fix for date.c 2962 2963 These are based on (though modified from) changes by Paul Eggert. 2964 2965 2966 Release 2000c - 2000-03-04 10:31:43 -0500 2967 2968 changes by Paul Eggert 2969 2970 2971 Release 2000b - 2000-02-21 12:16:29 -0500 2972 2973 changes by Paul Eggert and Joseph Myers 2974 2975 modest tweaks to the tz-art.htm and tz-link.htm files 2976 2977 2978 Release 2000a - 2000-01-18 09:21:26 -0500 2979 2980 changes by Paul Eggert 2981 2982 The two hypertext documents have also been renamed. 2983 2984 2985 Release code1999i-data1999j - 1999-11-15 18:43:22 -0500 2986 2987 Paul Eggert's changes 2988 2989 additions to the "zic" manual page and the "Arts.htm" file 2990 2991 2992 Release code1999h-data1999i - 1999-11-08 14:55:21 -0500 2993 2994 [not summarized] 2995 2996 2997 Release data1999h - 1999-10-07 03:50:29 -0400 2998 2999 changes by Paul Eggert to "europe" (most importantly, fixing 3000 Lithuania and Estonia) 3001 3002 3003 Release 1999g - 1999-09-28 11:06:18 -0400 3004 3005 data changes by Paul Eggert (most importantly, the change for 3006 Lebanon that buys correctness for this coming Sunday) 3007 3008 The "code" file contains changes to "Makefile" and "checktab.awk" to 3009 allow better checking of time zone files before they are published. 3010 3011 3012 Release 1999f - 1999-09-23 09:48:14 -0400 3013 3014 changes by Arthur David Olson and Paul Eggert 3015 3016 3017 Release 1999e - 1999-08-17 15:20:54 -0400 3018 3019 changes circulated by Paul Eggert, although the change to handling 3020 of DST-specifying time zone names has been commented out for now 3021 (search for "XXX" in "localtime.c" for details). These files also 3022 do not make any changes to the start of DST in Brazil. 3023 3024 In addition to Paul's changes, there are updates to "Arts.htm" and 3025 cleanups of URLs. 3026 3027 3028 Release 1999d - 1999-03-30 11:31:07 -0500 3029 3030 changes by Paul Eggert 3031 3032 The Makefile's "make public" rule has also been changed to do a test 3033 compile of each individual time zone data file (which should help 3034 avoid problems such as the one we had with Nicosia). 3035 3036 3037 Release 1999c - 1999-03-25 09:47:47 -0500 3038 3039 changes by Paul Eggert, most importantly the change for Chile. 3040 3041 3042 Release 1999b - 1999-02-01 17:51:44 -0500 3043 3044 changes by Paul Eggert 3045 3046 code changes (suggested by Mani Varadarajan, mani at be.com) for 3047 correct handling of symbolic links when building using a relative directory 3048 3049 code changes to generate correct messages for failed links 3050 3051 updates to the URLs in Arts.htm 3052 3053 3054 Release 1999a - 1999-01-19 16:20:29 -0500 3055 3056 error message internationalizations and corrections in zic.c and 3057 zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz, 3058 to whom thanks!) 3059 3060 3061 Release code1998h-data1998i - 1998-10-01 09:56:10 -0400 3062 3063 changes for Brazil, Chile, and Germany 3064 3065 support for use of "24:00" in the input files for the time zone compiler 3066 3067 3068 Release code1998g-data1998h - 1998-09-24 10:50:28 -0400 3069 3070 changes by Paul Eggert 3071 3072 correction to a define in the "private.h" file 3073 3074 3075 Release data1998g - 1998-08-11 03:28:35 -0000 3076 [tzdata1998g.tar.gz is missing!] 3077 3078 Lithuanian change provided by mgedmin at pub.osf.it 3079 3080 Move creation of the GMT link with Etc/GMT to "etcetera" (from 3081 "backward") to ensure that the GMT file is created even where folks 3082 don't want the "backward" links (as suggested by Paul Eggert). 3083 3084 3085 Release data1998f - 1998-07-20 13:50:00 -0000 3086 [tzdata1998f.tar.gz is missing!] 3087 3088 Update the "leapseconds" file to include the newly-announced 3089 insertion at the end of 1998. 3090 3091 3092 Release code1998f - 1998-06-01 10:18:31 -0400 3093 3094 addition to localtime.c by Guy Harris 3095 3096 3097 Release 1998e - 1998-05-28 09:56:26 -0400 3098 3099 The Makefile is changed to produce zoneinfo-posix rather than 3100 zoneinfo/posix, and to produce zoneinfo-leaps rather than 3101 zoneinfo/right. 3102 3103 data changes by Paul Eggert 3104 3105 changes from Guy Harris to provide asctime_r and ctime_r 3106 3107 A usno1998 file (substantially identical to usno1997) has been added. 3108 3109 3110 Release 1998d - 1998-05-14 11:58:34 -0400 3111 3112 changes to comments (in particular, elimination of references to CIA maps). 3113 "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places 3114 where changes occur. 3115 3116 3117 Release 1998c - 1998-02-28 12:32:26 -0500 3118 3119 changes by Paul Eggert (save the "French correction," on which I'll 3120 wait for the dust to settle) 3121 3122 symlink changes 3123 3124 changes and additions to Arts.htm 3125 3126 3127 Release 1998b - 1998-01-17 14:31:51 -0500 3128 3129 URL cleanups and additions 3130 3131 3132 Release 1998a - 1998-01-13 12:37:35 -0500 3133 3134 changes by Paul Eggert 3135 3136 3137 Release code1997i-data1997k - 1997-12-29 09:53:41 -0500 3138 3139 changes by Paul Eggert, with minor modifications from Arthur David 3140 Olson to make the files more browser friendly 3141 3142 3143 Release code1997h-data1997j - 1997-12-18 17:47:35 -0500 3144 3145 minor changes to put "TZif" at the start of each time zone information file 3146 3147 a rule has also been added to the Makefile so you can 3148 make zones 3149 to just recompile the zone information files (rather than doing a 3150 full "make install" with its other effects). 3151 3152 3153 Release data1997i - 1997-10-07 08:45:38 -0400 3154 3155 changes to Africa by Paul Eggert 3156 3157 3158 Release code1997g-data1997h - 1997-09-04 16:56:54 -0400 3159 3160 corrections for Uruguay (and other locations) 3161 3162 Arthur David Olson's simple-minded fix allowing mktime to both 3163 correctly handle leap seconds and correctly handle tm_sec values 3164 upon which arithmetic has been performed. 3165 3166 3167 Release code1997f-data1997g - 1997-07-19 13:15:02 -0400 3168 3169 Paul Eggert's updates 3170 3171 a small change to a function prototype; 3172 3173 "Music" has been renamed "Arts.htm", HTMLified, and augmented to 3174 include information on Around the World in Eighty Days. 3175 3176 3177 Release code1997e-data1997f - 1997-05-03 18:52:34 -0400 3178 3179 fixes to zic's error handling 3180 3181 changes inspired by the item circulated on Slovenia 3182 3183 The description of Web resources has been HTMLified for browsing 3184 convenience. 3185 3186 A new piece of tz-related music has been added to the "Music" file. 3187 3188 3189 Release code1997d-data1997e - 1997-03-29 12:48:52 -0500 3190 3191 Paul Eggert's latest suggestions 3192 3193 3194 Release code1997c-data1997d - 1997-03-07 20:37:54 -0500 3195 3196 changes to "zic.c" to correct performance of the "-s" option 3197 3198 a new file "usno1997" 3199 3200 3201 Release data1997c - 1997-03-04 09:58:18 -0500 3202 3203 changes in Israel 3204 3205 3206 Release 1997b - 1997-02-27 18:34:19 -0500 3207 3208 The data file incorporates the 1997 leap second. 3209 3210 The code file incorporates Arthur David Olson's take on the 3211 zic/multiprocessor/directory-creation situation. 3212 3213 3214 Release 1997a - 1997-01-21 09:11:10 -0500 3215 3216 Paul Eggert's Antarctica (and other changes) 3217 3218 Arthur David Olson finessed the "getopt" issue by checking against 3219 both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1 3220 is returned while SunOS 5.5's manual says EOF is returned). 3221 3222 3223 Release code1996o-data1996n - 1996-12-27 21:42:05 -0500 3224 3225 Paul Eggert's latest changes 3226 3227 3228 Release code1996n - 1996-12-16 09:42:02 -0500 3229 3230 link snapping fix from Bruce Evans (via Garrett Wollman) 3231 3232 3233 Release data1996m - 1996-11-24 02:37:34 -0000 3234 [tzdata1996m.tar.gz is missing!] 3235 3236 Paul Eggert's batch of changes 3237 3238 3239 Release code1996m-data1996l - 1996-11-05 14:00:12 -0500 3240 3241 No functional changes here; the files have simply been changed to 3242 make more use of ISO style dates in comments. The names of the above 3243 files now include the year in full. 3244 3245 3246 Release code96l - 1996-09-08 17:12:20 -0400 3247 3248 tzcode96k was missing a couple of pieces. 3249 3250 3251 Release 96k - 1996-09-08 16:06:22 -0400 3252 3253 the latest round of changes from Paul Eggert 3254 3255 the recent Year 2000 material 3256 3257 3258 Release code96j - 1996-07-30 13:18:53 -0400 3259 3260 Set sp->typecnt as suggested by Timothy Patrick Murphy. 3261 3262 3263 Release code96i - 1996-07-27 20:11:35 -0400 3264 3265 Paul's suggested patch for strftime %V week numbers 3266 3267 3268 Release data96i - 1996-07-01 18:13:04 -0400 3269 3270 "northamerica" and "europe" changes by Paul Eggert 3271 3272 3273 Release code96h - 1996-06-05 08:02:21 -0400 3274 3275 fix for handling transitions specified in Universal Time 3276 3277 Some "public domain" notices have also been added. 3278 3279 3280 Release code96g - 1996-05-16 14:00:26 -0400 3281 3282 fix for the simultaneous-DST-and-zone-change challenge 3283 3284 3285 Release data96h - 1996-05-09 17:40:51 -0400 3286 3287 changes by Paul Eggert 3288 3289 3290 Release code96f-data96g - 1996-05-03 03:09:59 -0000 3291 [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!] 3292 3293 The changes get us some of the way to fixing the problems noted in Paul 3294 Eggert's letter yesterday (in addition to a few others). The approach 3295 has been to make zic a bit smarter about figuring out what time zone 3296 abbreviations apply just after the time specified in the "UNTIL" part 3297 of a zone line. Putting the smarts in zic means avoiding having 3298 transition times show up in both "Zone" lines and "Rule" lines, which 3299 in turn avoids multiple transition time entries in time zone files. 3300 (This also makes the zic input files such as "europe" a bit shorter and 3301 should ease maintenance.) 3302 3303 3304 Release data96f - 1996-04-19 19:20:03 -0000 3305 [tzdata96f.tar.gz is missing!] 3306 3307 The only changes are to the "northamerica" file; the time zone 3308 abbreviation for Denver is corrected to MST (and MDT), and the 3309 comments for Mexico have been updated. 3310 3311 3312 Release data96e - 1996-03-19 17:37:26 -0500 3313 3314 Proposals by Paul Eggert, in particular the Portugal change that 3315 comes into play at the end of this month. 3316 3317 3318 Release data96d - 1996-03-18 20:49:39 -0500 3319 3320 [not summarized] 3321 3322 3323 Release code96e - 1996-02-29 15:43:27 -0000 3324 [tzcode96e.tar.gz is missing!] 3325 3326 internationalization changes and the fix to the documentation for strftime 3327 3328 3329 Release code96d-data96c - 1996-02-12 11:05:27 -0500 3330 3331 The "code" file simply updates Bob Kridle's electronic address. 3332 3333 The "data" file updates rules for Mexico. 3334 3335 3336 Release data96b - 1996-01-27 15:44:42 -0500 3337 3338 Kiribati change 3339 3340 3341 Release code96c - 1996-01-16 16:58:15 -0500 3342 3343 leap-year streamlining and binary-search changes 3344 3345 fix to newctime.3 3346 3347 3348 Release code96b - 1996-01-10 20:42:39 -0500 3349 3350 fixes and enhancements from Paul Eggert, including code that 3351 emulates the behavior of recent versions of the SunOS "date" 3352 command. 3353 3354 3355 Release 96a - 1996-01-06 09:08:24 -0500 3356 3357 Israel updates 3358 3359 fixes to strftime.c for correct ISO 8601 week number generation, 3360 plus support for two new formats ('G' and 'g') to give ISO 8601 year 3361 numbers (which are not necessarily the same as calendar year numbers) 3362 3363 3364 Release code95i-data95m - 1995-12-21 12:46:47 -0500 3365 3366 The latest revisions from Paul Eggert are included, the usno1995 3367 file has been updated, and a new file ("WWW") covering useful URLs 3368 has been added. 3369 3370 3371 Release code95h-data95l - 1995-12-19 18:10:12 -0500 3372 3373 A simplification of a macro definition, a change to data for Sudan, 3374 and (for last minute shoppers) notes in the "Music" file on the CD 3375 "Old Man Time". 3376 3377 3378 Release code95g-data95k - 1995-10-30 10:32:47 -0500 3379 3380 (slightly reformatted) 8-bit-clean proposed patch 3381 3382 minor patch: US/Eastern -> America/New_York 3383 3384 snapshot of the USNO's latest data ("usno1995") 3385 3386 some other minor cleanups 3387 3388 3389 Release code95f-data95j - 1995-10-28 21:01:34 -0000 3390 [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!] 3391 3392 European cleanups 3393 3394 support for 64-bit time_t's 3395 3396 optimization in localtime.c 3397 3398 3399 Release code95e - 1995-10-13 13:23:57 -0400 3400 3401 the mktime change to scan from future to past when trying to find time zone 3402 offsets 3403 3404 3405 Release data95i - 1995-09-26 10:43:26 -0400 3406 3407 For Canada/Central, guess that the Sun customer's "one week too 3408 early" was just a approximation, and the true error is one month 3409 too early. This is consistent with the rest of Canada. 3410 3411 3412 Release data95h - 1995-09-21 11:26:48 -0400 3413 3414 latest changes from Paul Eggert 3415 3416 3417 Release code95d - 1995-09-14 11:14:45 -0400 3418 3419 the addition of a "Music" file, which documents four recorded 3420 versions of the tune "Save That Time". 3421 3422 3423 Release data95g - 1995-09-01 17:21:36 -0400 3424 3425 "yearistype" correction 3426 3427 3428 Release data95f - 1995-08-28 20:46:56 -0400 3429 3430 Paul Eggert's change to the australasia file 3431 3432 3433 Release data95e - 1995-07-08 18:02:34 -0400 3434 3435 The only change is a leap second at the end of this year. 3436 Thanks to Bradley White for forwarding news on the leap second. 3437 3438 3439 Release data95d - 1995-07-03 13:26:22 -0400 3440 3441 Paul Eggert's changes 3442 3443 3444 Release data95c - 1995-07-02 19:19:28 -0400 3445 3446 changes to "asia", "backward", "europe", and "southamerica" 3447 (read: northamericacentrics need not apply) 3448 3449 3450 Release code95c - 1995-03-13 14:00:46 -0500 3451 3452 one-line fix for sign extension problems in detzcode 3453 3454 3455 Release 95b - 1995-03-04 11:22:38 -0500 3456 3457 Minor changes in both: 3458 3459 The "code" file contains a workaround for the lack of "unistd.h" in 3460 Microsoft C++ version 7. 3461 3462 The "data" file contains a fixed "Link" for America/Shiprock. 3463 3464 3465 Release 94h - 1994-12-10 12:51:14 -0500 3466 3467 The files: 3468 3469 * incorporate the changes to "zdump" and "date" to make changes to 3470 the "TZ" environment variable permanent; 3471 3472 * incorporate the table changes by Paul Eggert; 3473 3474 * include (and document) support for universal time specifications in 3475 data files - but do not (yet) include use of this feature in the 3476 data files. 3477 3478 Think of this as "TZ Classic" - the software has been set up not to break if 3479 universal time shows up in its input, and data entries have been 3480 left as is so as not to break existing implementations. 3481 3482 3483 Release data94f - 1994-08-20 12:56:09 -0400 3484 3485 (with thanks!) the latest data updates from Paul Eggert 3486 3487 3488 Release data94e - 1994-06-04 13:13:53 -0400 3489 3490 [not summarized] 3491 3492 3493 Release code94g - 1994-05-05 12:14:07 -0400 3494 3495 fix missing "optind.c" and a reference to it in the Makefile 3496 3497 3498 Release code94f - 1994-05-05 13:00:33 -0000 3499 [tzcode94f.tar.gz is missing!] 3500 3501 changes to avoid overflow in difftime, as well as changes to cope 3502 with the 52/53 challenge in strftime 3503 3504 3505 Release code94e - 1994-03-30 23:32:59 -0500 3506 3507 change for the benefit of PCTS 3508 3509 3510 Release 94d - 1994-02-24 15:42:25 -0500 3511 3512 Avoid clashes with POSIX semantics for zones such as GMT+4. 3513 3514 Some other very minor housekeeping is also present. 3515 3516 3517 Release code94c - 1994-02-10 08:52:40 -0500 3518 3519 Fix bug where mkdirs was broken unless you compile with 3520 -fwritable-strings (which is generally losing to do). 3521 3522 3523 Release 94b - 1994-02-07 10:04:33 -0500 3524 3525 work by Paul Eggert who notes: 3526 3527 I found another book of time zone histories by E W Whitman; it's not 3528 as extensive as Shanks but has a few goodies of its own. I used it 3529 to update the tables. I also fixed some more as a result of 3530 correspondence with Adam David and Peter Ilieve, and move some stray 3531 links from 'europe' to 'backward'. I corrected some scanning errors 3532 in usno1989. 3533 3534 As far as the code goes, I fixed zic to allow years in the range 3535 INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900. 3536 And I cleaned up the zic documentation a little bit. 3537 3538 3539 Release data94a - 1994-02-03 08:58:54 -0500 3540 3541 It simply incorporates the recently announced leap second into the 3542 "leapseconds" file. 3543 3544 3545 Release 93g - 1993-11-22 17:28:27 -0500 3546 3547 Paul Eggert has provided a good deal of historic information (based 3548 on Shanks), and there are some code changes to deal with the buglets 3549 that crawled out in dealing with the new information. 3550 3551 3552 Release 93f - 1993-10-15 12:27:46 -0400 3553 3554 Paul Eggert's changes 3555 3556 3557 Release 93e - 1993-09-05 21:21:44 -0400 3558 3559 This has updated data for Israel, England, and Kwajalein. There's 3560 also an update to "zdump" to cope with Kwajalein's 24-hour jump. 3561 Thanks to Paul Eggert and Peter Ilieve for the changes. 3562 3563 3564 Release 93d - 1993-06-17 23:34:17 -0400 3565 3566 new fix and new data on Israel 3567 3568 3569 Release 93c - 1993-06-06 19:31:55 -0400 3570 3571 [not summarized] 3572 3573 3574 Release 93b - 1993-02-02 14:53:58 -0500 3575 3576 updated "leapseconds" file 3577 3578 3579 Release 93 - 1993-01-08 07:01:06 -0500 3580 3581 At kre's suggestion, the package has been split in two - a code piece 3582 (which also includes documentation) that's only of use to folks who 3583 want to recompile things and a data piece useful to anyone who can 3584 run "zic". 3585 3586 The new version has a few changes to the data files, a few 3587 portability changes, and an off-by-one fix (with thanks to 3588 Tom Karzes at deshaw.com for providing a description and a 3589 solution). 3590 3591 3592 Release 92c - 1992-11-21 17:35:36 -0000 3593 [tz92c.tar.Z is missing!] 3594 3595 The fallout from the latest round of DST transitions. 3596 3597 There are changes for Portugal, Saskatchewan, and "Pacific-New"; 3598 there's also a change to "zic.c" that makes it portable to more systems. 3599 3600 3601 Release 92 - 1992-04-25 18:17:03 -0000 3602 [tz92.tar.Z is missing!] 3603 3604 By popular demand (well, at any rate, following a request by kre at munnari) 3605 3606 3607 The 1989 update of the time zone package featured: 3608 3609 * POSIXization (including interpretation of POSIX-style TZ environment 3610 variables, provided by Guy Harris), 3611 * ANSIfication (including versions of "mktime" and "difftime"), 3612 * SVIDulation (an "altzone" variable) 3613 * MACHination (the "gtime" function) 3614 * corrections to some time zone data (including corrections to the rules 3615 for Great Britain and New Zealand) 3616 * reference data from the United States Naval Observatory for folks who 3617 want to do additional time zones 3618 * and the 1989 data for Saudi Arabia. 3619 3620 (Since this code will be treated as "part of the implementation" in some 3621 places and as "part of the application" in others, there's no good way to 3622 name functions, such as timegm, that are not part of the proposed ANSI C 3623 standard; such functions have kept their old, underscore-free names in this 3624 update.) 3625 3626 And the "dysize" function has disappeared; it was present to allow 3627 compilation of the "date" command on old BSD systems, and a version of "date" 3628 is now provided in the package. The "date" command is not created when you 3629 "make all" since it may lack options provided by the version distributed with 3630 your operating system, or may not interact with the system in the same way 3631 the native version does. 3632 3633 Since POSIX frowns on correct leap second handling, the default behavior of 3634 the "zic" command (in the absence of a "-L" option) has been changed to omit 3635 leap second information from its output files. 3636 3637 3638 ----- 3639 Notes 3640 3641 This file contains copies of the part of each release announcement 3642 that talks about the changes in that release. The text has been 3643 adapted and reformatted for the purposes of this file. 3644 3645 Traditionally a release R consists of a pair of tarball files, 3646 tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g., 3647 code2010a, data2012c) consist of just one or the other tarball, and a 3648 few (e.g., code2012c-data2012d) have tarballs with mixed version 3649 numbers. Recent releases also come in an experimental format 3650 consisting of a single tarball tzdb-R.tar.lz with extra data. 3651 3652 Release time stamps are taken from the release's commit (for newer, 3653 Git-based releases), from the newest file in the tarball (for older 3654 releases, where this info is available) or from the email announcing 3655 the release (if all else fails; these are marked with a time zone of 3656 -0000 and an "is missing!" comment). 3657 3658 Earlier versions of the code and data were not announced on the tz 3659 list and are not summarized here. 3660 3661 This file is in the public domain. 3662 3663 Local Variables: 3664 coding: utf-8 3665 End: 3666
Indexes created Tue Sep 30 11:09:46 GMT 2025