NEWS revision 1.28
1 News for the tz database 2 3 Release 20198 - 2019-03-25 22:01:33 -0700 4 5 Briefly: 6 Palestine "springs forward" on 2019-03-30 instead of 2019-03-23. 7 Metlakatla "fell back" to rejoin Alaska Time on 2019-01-20 at 02:00. 8 9 Changes to past and future timestamps 10 11 Palestine will not start DST until 2019-03-30, instead of 2019-03-23 as 12 previously predicted. Adjust our prediction by guessing that spring 13 transitions will be between 24 and 30 March, which matches recent practice 14 since 2016. (Thanks to Even Scharning and Tim Parenti.) 15 16 Metlakatla ended its observance of Pacific standard time, 17 rejoining Alaska Time, on 2019-01-20 at 02:00. (Thanks to Ryan 18 Stanley and Tim Parenti.) 19 20 Changes to past timestamps 21 22 Israel observed DST in 1980 (08-02/09-13) and 1984 (05-05/08-25). 23 (Thanks to Alois Treindl and Isaac Starkman.) 24 25 Changes to time zone abbreviations 26 27 Etc/UCT is now a backward-compatibility link to Etc/UTC, instead 28 of being a separate zone that generates the abbreviation "UCT", 29 which nowadays is typically a typo. (Problem reported by Isiah 30 Meadows.) 31 32 Changes to code 33 34 zic now has an -r option to limit the time range of output data. 35 For example, 'zic -r @1000000000' limits the output data to 36 timestamps starting 1000000000 seconds after the Epoch. 37 This helps shrink output size and can be useful for applications 38 not needing the full timestamp history, such as TZDIST truncation; 39 see Internet RFC 8536 section 5.1. (Inspired by a feature request 40 from Christopher Wong, helped along by bug reports from Wong and 41 from Tim Parenti.) 42 43 Changes to documentation 44 45 Mention Internet RFC 8536 (February 2019), which documents TZif. 46 47 tz-link.html now cites tzdata-meta 48 <https://tzdata-meta.timtimeonline.com/>. 49 50 51 Release 2018i - 2018-12-30 11:05:43 -0800 52 53 Briefly: 54 So Tom and Prncipe switches from +01 to +00 on 2019-01-01. 55 56 Changes to future timestamps 57 58 Due to a change in government, So Tom and Prncipe switches back 59 from +01 to +00 on 2019-01-01 at 02:00. (Thanks to Vadim 60 Nasardinov and Michael Deckers.) 61 62 63 Release 2018h - 2018-12-23 17:59:32 -0800 64 65 Briefly: 66 Qyzylorda, Kazakhstan moved from +06 to +05 on 2018-12-21. 67 New zone Asia/Qostanay because Qostanay, Kazakhstan didn't move. 68 Metlakatla, Alaska observes PST this winter only. 69 Guess Morocco will continue to adjust clocks around Ramadan. 70 Add predictions for Iran from 2038 through 2090. 71 72 Changes to future timestamps 73 74 Guess that Morocco will continue to fall back just before and 75 spring forward just after Ramadan, the practice since 2012. 76 (Thanks to Maamar Abdelkader.) This means Morocco will observe 77 negative DST during Ramadan in main and vanguard formats, and in 78 rearguard format it stays in the +00 timezone and observes 79 ordinary DST in all months other than Ramadan. As before, extend 80 this guesswork to the year 2037. As a consequence, Morocco is 81 scheduled to observe three DST transitions in some Gregorian years 82 (e.g., 2033) due to the mismatch between the Gregorian and Islamic 83 calendars. 84 85 The table of exact transitions for Iranian DST has been extended. 86 It formerly cut off before the year 2038 in a nod to 32-bit time_t. 87 It now cuts off before 2091 as there is doubt about how the Persian 88 calendar will treat 2091. This change predicts DST transitions in 89 2038-9, 2042-3, and 2046-7 to occur one day later than previously 90 predicted. As before, post-cutoff transitions are approximated. 91 92 Changes to past and future timestamps 93 94 Qyzylorda (aka Kyzylorda) oblast in Kazakhstan moved from +06 to 95 +05 on 2018-12-21. This is a zone split as Qostanay (aka 96 Kostanay) did not switch, so create a zone Asia/Qostanay. 97 98 Metlakatla moved from Alaska to Pacific standard time on 2018-11-04. 99 It did not change clocks that day and remains on -08 this winter. 100 (Thanks to Ryan Stanley.) It will revert to the usual Alaska 101 rules next spring, so this change affects only timestamps 102 from 2018-11-04 through 2019-03-10. 103 104 Change to past timestamps 105 106 Kwajalein's 1993-08-20 transition from -12 to +12 was at 24:00, 107 not 00:00. I transcribed the time incorrectly from Shanks. 108 (Thanks to Phake Nick.) 109 110 Nauru's 1979 transition was on 02-10 at 02:00, not 05-01 at 00:00. 111 (Thanks to Phake Nick.) 112 113 Guam observed DST irregularly from 1959 through 1977. 114 (Thanks to Phake Nick.) 115 116 Hong Kong observed DST in 1941 starting 06-15 (not 04-01), then on 117 10-01 changed standard time to +08:30 (not +08). Its transition 118 back to +08 after WWII was on 1945-09-15, not the previous day. 119 Its 1904-10-30 change took effect at 01:00 +08 (not 00:00 LMT). 120 (Thanks to Phake Nick, Steve Allen, and Joseph Myers.) Also, 121 its 1952 fallback was on 11-02 (not 10-25). 122 123 This release contains many changes to timestamps before 1946 due 124 to Japanese possession or occupation of Pacific/Chuuk, 125 Pacific/Guam, Pacific/Kosrae, Pacific/Kwajalein, Pacific/Majuro, 126 Pacific/Nauru, Pacific/Palau, and Pacific/Pohnpei. 127 (Thanks to Phake Nick.) 128 129 Assume that the Spanish East Indies was like the Philippines and 130 observed American time until the end of 1844. This affects 131 Pacific/Chuuk, Pacific/Kosrae, Pacific/Palau, and Pacific/Pohnpei. 132 133 Changes to past tm_isdst flags 134 135 For the recent Morocco change, the tm_isdst flag should be 1 from 136 2018-10-27 00:00 to 2018-10-28 03:00. (Thanks to Michael Deckers.) 137 Give a URL to the official decree. (Thanks to Matt Johnson.) 138 139 140 Release 2018g - 2018-10-26 22:22:45 -0700 141 142 Briefly: 143 Morocco switches to permanent +01 on 2018-10-28. 144 145 Changes to future timestamps 146 147 Morocco switches from +00/+01 to permanent +01 effective 2018-10-28, 148 so its clocks will not fall back as previously scheduled. 149 (Thanks to Mohamed Essedik Najd and Brian Inglis.) 150 151 Changes to code 152 153 When generating TZif files with leap seconds, zic no longer uses a 154 format that trips up older 32-bit clients, fixing a bug introduced 155 in 2018f. (Reported by Daniel Fischer.) Also, the zic workaround 156 for QTBUG-53071 now also works for TZif files with leap seconds. 157 158 The translator to rearguard format now rewrites the line 159 "Rule Japan 1948 1951 - Sep Sat>=8 25:00 0 S" to 160 "Rule Japan 1948 1951 - Sep Sun>=9 1:00 0 S". 161 This caters to zic before 2007 and to Oracle TZUpdater 2.2.0 162 and earlier. (Reported by Christos Zoulas.) 163 164 Changes to past time zone abbreviations 165 166 Change HDT to HWT/HPT for WWII-era abbreviations in Hawaii. 167 This reverts to 2011h, as the abbreviation change in 2011i was 168 likely inadvertent. 169 170 Changes to documentation 171 172 tzfile.5 has new sections on interoperability issues. 173 174 175 Release 2018f - 2018-10-18 00:14:18 -0700 176 177 Briefly: 178 Volgograd moves from +03 to +04 on 2018-10-28. 179 Fiji ends DST 2019-01-13, not 2019-01-20. 180 Most of Chile changes DST dates, effective 2019-04-06. 181 182 Changes to future timestamps 183 184 Volgograd moves from +03 to +04 on 2018-10-28 at 02:00. 185 (Thanks to Alexander Fetisov and Stepan Golosunov.) 186 187 Fiji ends DST 2019-01-13 instead of the 2019-01-20 previously 188 predicted. (Thanks to Raymond Kumar.) Adjust future predictions 189 accordingly. 190 191 Most of Chile will end DST on the first Saturday in April at 24:00 mainland 192 time, and resume DST on the first Saturday in September at 24:00 mainland 193 time. The changes are effective from 2019-04-06, and do not affect the 194 Magallanes region modeled by America/Punta_Arenas. (Thanks to Juan Correa 195 and Tim Parenti.) Adjust future predictions accordingly. 196 197 Changes to past timestamps 198 199 The 2018-05-05 North Korea 30-minute time zone change took place 200 at 23:30 the previous day, not at 00:00 that day. 201 202 China's 1988 spring-forward transition was on April 17, not 203 April 10. Its DST transitions in 1986/91 were at 02:00, not 00:00. 204 (Thanks to P Chan.) 205 206 Fix several issues for Macau before 1992. Macau's pre-1904 LMT 207 was off by 10 s. Macau switched to +08 in 1904 not 1912, and 208 temporarily switched to +09/+10 during World War II. Macau 209 observed DST in 1942/79, not 1961/80, and there were several 210 errors for transition times and dates. (Thanks to P Chan.) 211 212 The 1948-1951 fallback transitions in Japan were at 25:00 on 213 September's second Saturday, not at 24:00. (Thanks to Phake Nick.) 214 zic turns this into 01:00 on the day after September's second 215 Saturday, which is the best that POSIX or C platforms can do. 216 217 Incorporate 1940-1949 Asia/Shanghai DST transitions from a 2014 218 paper by Li Yu, replacing more-questionable data from Shanks. 219 220 Changes to time zone abbreviations 221 222 Use "PST" and "PDT" for Philippine time. (Thanks to Paul Goyette.) 223 224 Changes to code 225 226 zic now always generates TZif files where time type 0 is used for 227 timestamps before the first transition. This simplifies the 228 reading of TZif files and should not affect behavior of existing 229 TZif readers because the same set of time types is used; only 230 their internal indexes may have changed. This affects only the 231 legacy zones EST5EDT, CST6CDT, MST7MDT, PST8PDT, CET, MET, and 232 EET, which previously used nonzero types for these timestamps. 233 234 Because of the type 0 change, zic no longer outputs a dummy 235 transition at time -2**59 (before the Big Bang), as clients should 236 no longer need this to handle historical timestamps correctly. 237 This reverts a change introduced in 2013d and shrinks most TZif 238 files by a few bytes. 239 240 zic now supports negative time-of-day in Rule and Leap lines, e.g., 241 "Rule X min max - Apr lastSun -6:00 1:00 -" means the transition 242 occurs at 18:00 on the Saturday before the last Sunday in April. 243 This behavior was documented in 2018a but the code did not 244 entirely match the documentation. 245 246 localtime.c no longer requires at least one time type in TZif 247 files that lack transitions or have a POSIX-style TZ string. This 248 future-proofs the code against possible future extensions to the 249 format that would allow TZif files with POSIX-style TZ strings and 250 without transitions or time types. 251 252 A read-access subscript error in localtime.c has been fixed. 253 It could occur only in TZif files with timecnt == 0, something that 254 does not happen in practice now but could happen in future versions. 255 256 localtime.c no longer ignores TZif POSIX-style TZ strings that 257 specify only standard time. Instead, these TZ strings now 258 override the default time type for timestamps after the last 259 transition (or for all timestamps if there are no transitions), 260 just as DST strings specifying DST have always done. 261 262 leapseconds.awk now outputs "#updated" and "#expires" comments, 263 and supports leap seconds at the ends of months other than June 264 and December. (Inspired by suggestions from Chris Woodbury.) 265 266 Changes to documentation 267 268 New restrictions: A Rule name must start with a character that 269 is neither an ASCII digit nor "-" nor "+", and an unquoted name 270 should not use characters in the set "!$%&'()*,/:;<=>?@[\]^`{|}~". 271 The latter restriction makes room for future extensions (a 272 possibility noted by Tom Lane). 273 274 tzfile.5 now documents what time types apply before the first and 275 after the last transition, if any. 276 277 Documentation now uses the spelling "timezone" for a TZ setting 278 that determines timestamp history, and "time zone" for a 279 geographic region currently sharing the same standard time. 280 281 The name "TZif" is now used for the tz binary data format. 282 283 tz-link.htm now mentions the A0 TimeZone Migration utilities. 284 (Thanks to Aldrin Martoq for the link.) 285 286 Changes to build procedure 287 288 New 'make' target 'rearguard_tarballs' to build the rearguard 289 tarball only. This is a convenience on platforms that lack lzip 290 if you want to build the rearguard tarball. (Problem reported by 291 Deborah Goldsmith.) 292 293 tzdata.zi is now more stable from release to release. (Problem 294 noted by Tom Lane.) It is also a bit shorter. 295 296 tzdata.zi now can contain comment lines documenting configuration 297 information, such as which data format was selected, which input 298 files were used, and how leap seconds are treated. (Problems 299 noted by Lester Caine and Brian Inglis.) If the Makefile defaults 300 are used these comment lines are absent, for backward 301 compatibility. A redistributor intending to alter its copy of the 302 files should also append "-LABEL" to the 'version' file's first 303 line, where "LABEL" identifies the redistributor's change. 304 305 306 Release 2018e - 2018-05-01 23:42:51 -0700 307 308 Briefly: 309 310 North Korea switches back to +09 on 2018-05-05. 311 The main format uses negative DST again, for Ireland etc. 312 'make tarballs' now also builds a rearguard tarball. 313 New 's' and 'd' suffixes in SAVE columns of Rule and Zone lines. 314 315 Changes to past and future timestamps 316 317 North Korea switches back from +0830 to +09 on 2018-05-05. 318 (Thanks to Kang Seonghoon, Arthur David Olson, Seo Sanghyeon, 319 and Tim Parenti.) 320 321 Bring back the negative-DST changes of 2018a, except be more 322 compatible with data parsers that do not support negative DST. 323 Also, this now affects historical timestamps in Namibia and the 324 former Czechoslovakia, not just Ireland. The main format now uses 325 negative DST to model timestamps in Europe/Dublin (from 1971 on), 326 Europe/Prague (1946/7), and Africa/Windhoek (1994/2017). This 327 does not affect UT offsets, only time zone abbreviations and the 328 tm_isdst flag. Also, this does not affect rearguard or vanguard 329 formats; effectively the main format now uses vanguard instead of 330 rearguard format. Data parsers that do not support negative DST 331 can still use data from the rearguard tarball described below. 332 333 Changes to build procedure 334 335 The command 'make tarballs' now also builds the tarball 336 tzdataVERSION-rearguard.tar.gz, which is like tzdataVERSION.tar.gz 337 except that it uses rearguard format intended for trailing-edge 338 data parsers. 339 340 Changes to data format and to code 341 342 The SAVE column of Rule and Zone lines can now have an 's' or 'd' 343 suffix, which specifies whether the adjusted time is standard time 344 or daylight saving time. If no suffix is given, daylight saving 345 time is used if and only if the SAVE column is nonzero; this is 346 the longstanding behavior. Although this new feature is not used 347 in tzdata, it could be used to specify the legal time in Namibia 348 1994-2017, as opposed to the popular time (see below). 349 350 Changes to past timestamps 351 352 From 1994 through 2017 Namibia observed DST in winter, not summer. 353 That is, it used negative DST, as Ireland still does. This change 354 does not affect UTC offsets; it affects only the tm_isdst flag and 355 the abbreviation used during summer, which is now CAT, not WAST. 356 Although (as noted by Michael Deckers) summer and winter time were 357 both simply called "standard time" in Namibian law, in common 358 practice winter time was considered to be DST (as noted by Stephen 359 Colebourne). The full effect of this change is only in vanguard 360 and main format; in rearguard format, the tm_isdst flag is still 361 zero in winter and nonzero in summer. 362 363 In 1946/7 Czechoslovakia also observed negative DST in winter. 364 The full effect of this change is only in vanguard and main 365 formats; in rearguard format, it is modeled as plain GMT without 366 daylight saving. Also, the dates of some 1944/5 DST transitions 367 in Czechoslovakia have been changed. 368 369 370 Release 2018d - 2018-03-22 07:05:46 -0700 371 372 Briefly: 373 374 Palestine starts DST a week earlier in 2018. 375 Add support for vanguard and rearguard data consumers. 376 Add subsecond precision to source data format, though not to data. 377 378 Changes to future timestamps 379 380 In 2018, Palestine starts DST on March 24, not March 31. 381 Adjust future predictions accordingly. (Thanks to Sharef Mustafa.) 382 383 Changes to past and future timestamps 384 385 Casey Station in Antarctica changed from +11 to +08 on 2018-03-11 386 at 04:00. (Thanks to Steffen Thorsen.) 387 388 Changes to past timestamps 389 390 Historical transitions for Uruguay, represented by 391 America/Montevideo, have been updated per official legal documents, 392 replacing previous data mainly originating from the inventions of 393 Shanks & Pottenger. This has resulted in adjustments ranging from 394 30 to 90 minutes in either direction over at least two dozen 395 distinct periods ranging from one day to several years in length. 396 A mere handful of pre-1991 transitions are unaffected; data since 397 then has come from more reliable contemporaneous reporting. These 398 changes affect various timestamps in 1920-1923, 1936, 1939, 399 1942-1943, 1959, 1966-1970, 1972, 1974-1980, and 1988-1990. 400 Additionally, Uruguay's pre-standard-time UT offset has been 401 adjusted westward by 7 seconds, from UT-03:44:44 to UT-03:44:51, to 402 match the location of the Observatory of the National Meteorological 403 Institute in Montevideo. 404 (Thanks to Jeremie Bonjour, Tim Parenti, and Michael Deckers.) 405 406 Enderbury and Kiritimati skipped New Year's Eve 1994, not 407 New Year's Day 1995. (Thanks to Kerry Shetline.) 408 409 Fix the 1912-01-01 transition for Portugal and its colonies. 410 This transition was at 00:00 according to the new UT offset, not 411 according to the old one. Also assume that Cape Verde switched on 412 the same date as the rest, not in 1907. This affects 413 Africa/Bissau, Africa/Sao_Tome, Asia/Macau, Atlantic/Azores, 414 Atlantic/Cape_Verde, Atlantic/Madeira, and Europe/Lisbon. 415 (Thanks to Michael Deckers.) 416 417 Fix an off-by-1 error for pre-1913 timestamps in Jamaica and in 418 Turks & Caicos. 419 420 Changes to past time zone abbreviations 421 422 MMT took effect in Uruguay from 1908-06-10, not 1898-06-28. There 423 is no clock change associated with the transition. 424 425 Changes to build procedure 426 427 The new DATAFORM macro in the Makefile lets the installer choose 428 among three source data formats. The idea is to lessen downstream 429 disruption when data formats are improved. 430 431 * DATAFORM=vanguard installs from the latest, bleeding-edge 432 format. DATAFORM=main (the default) installs from the format 433 used in the 'africa' etc. files. DATAFORM=rearguard installs 434 from a trailing-edge format. Eventually, elements of today's 435 vanguard format should move to the main format, and similarly 436 the main format's features should eventually move to the 437 rearguard format. 438 439 * In the current version, the main and rearguard formats are 440 identical and match that of 2018c, so this change does not 441 affect default behavior. The vanguard format currently contains 442 one feature not in the main format: negative SAVE values. This 443 improves support for Ireland, which uses Irish Standard Time 444 (IST, UTC+01) in summer and GMT (UTC) in winter. tzcode has 445 supported negative SAVE values for decades, and this feature 446 should move to the main format soon. However, it will not move 447 to the rearguard format for quite some time because some 448 downstream parsers do not support it. 449 450 * The build procedure constructs three files vanguard.zi, main.zi, 451 and rearguard.zi, one for each format. Although the files 452 represent essentially the same data, they may have minor 453 discrepancies that users are not likely to notice. The files 454 are intended for downstream data consumers and are not 455 installed. Zoneinfo parsers that do not support negative SAVE values 456 should start using rearguard.zi, so that they will be unaffected 457 when the negative-DST feature moves from vanguard to main. 458 Bleeding-edge Zoneinfo parsers that support the new features 459 already can use vanguard.zi; in this respect, current tzcode is 460 bleeding-edge. 461 462 The Makefile should now be safe for parallelized builds, and 'make 463 -j to2050new.tzs' is now much faster on a multiprocessor host 464 with GNU Make. 465 466 When built with -DSUPPRESS_TZDIR, the tzcode library no longer 467 prepends TZDIR/ to file names that do not begin with '/'. This is 468 not recommended for general use, due to its security implications. 469 (From a suggestion by Manuela Friedrich.) 470 471 Changes to code 472 473 zic now accepts subsecond precision in expressions like 474 00:19:32.13, which is approximately the legal time of the 475 Netherlands from 1835 to 1937. However, because it is 476 questionable whether the few recorded uses of non-integer offsets 477 had subsecond precision in practice, there are no plans for tzdata 478 to use this feature. (Thanks to Steve Allen for pointing out 479 the limitations of historical data in this area.) 480 481 The code is a bit more portable to MS-Windows. Installers can 482 compile with -DRESERVE_STD_EXT_IDS on MS-Windows platforms that 483 reserve identifiers like 'localtime'. (Thanks to Manuela 484 Friedrich). 485 486 Changes to documentation and commentary 487 488 theory.html now outlines tzdb's extensions to POSIX's model for 489 civil time, and has a section "POSIX features no longer needed" 490 that lists POSIX API components that are now vestigial. 491 (From suggestions by Steve Summit.) It also better distinguishes 492 time zones from tz regions. (From a suggestion by Guy Harris.) 493 494 Commentary is now more consistent about using the phrase "daylight 495 saving time", to match the C name tm_isdst. Daylight saving time 496 need not occur in summer, and need not have a positive offset from 497 standard time. 498 499 Commentary about historical transitions in Uruguay has been expanded 500 with links to many relevant legal documents. 501 (Thanks to Tim Parenti.) 502 503 Commentary now uses some non-ASCII characters with Unicode value 504 less than U+0100, as they can be useful and should work even with 505 older editors such as XEmacs. 506 507 508 Release 2018c - 2018-01-22 23:00:44 -0800 509 510 Briefly: 511 Revert Irish changes that relied on negative SAVE values. 512 513 Changes to tm_isdst 514 515 Revert the 2018a change to Europe/Dublin. As before, this change 516 does not affect UT offsets or abbreviations; it affects only 517 whether timestamps are considered to be standard time or 518 daylight-saving time, as expressed in the tm_isdst flag of C's 519 struct tm type. This reversion is intended to be a temporary 520 workaround for problems discovered with downstream uses of 521 releases 2018a and 2018b, which implemented Irish time by using 522 negative SAVE values in the Eire rules of the 'europe' file. 523 Although negative SAVE values have been part of tzcode for many 524 years and are supported by many platforms, they were not 525 documented before 2018a and ICU and OpenJDK do not currently 526 support them. A mechanism to export data to platforms lacking 527 support for negative DST is planned to be developed before the 528 change is reapplied. (Problems reported by Deborah Goldsmith and 529 Stephen Colebourne.) 530 531 Changes to past timestamps 532 533 Japanese DST transitions (1948-1951) were Sundays at 00:00, not 534 Saturdays or Sundays at 02:00. (Thanks to Takayuki Nikai.) 535 536 Changes to build procedure 537 538 The build procedure now works around mawk 1.3.3's lack of support 539 for character class expressions. (Problem reported by Ohyama.) 540 541 542 Release 2018b - 2018-01-17 23:24:48 -0800 543 544 Briefly: 545 Fix a packaging problem in tz2018a, which was missing 'pacificnew'. 546 547 Changes to build procedure 548 549 The distribution now contains the file 'pacificnew' again. 550 This file was inadvertantly omitted in the 2018a distribution. 551 (Problem reported by Matias Fonzo.) 552 553 554 Release 2018a - 2018-01-12 22:29:21 -0800 555 556 Briefly: 557 So Tom and Prncipe switched from +00 to +01. 558 Brazil's DST will now start on November's first Sunday. 559 Ireland's standard time is now in the summer, not the winter. 560 Use Debian-style installation locations, instead of 4.3BSD-style. 561 New zic option -t. 562 563 Changes to past and future timestamps 564 565 So Tom and Prncipe switched from +00 to +01 on 2018-01-01 at 566 01:00. (Thanks to Steffen Thorsen and Michael Deckers.) 567 568 Changes to future timestamps 569 570 Starting in 2018 southern Brazil will begin DST on November's 571 first Sunday instead of October's third Sunday. (Thanks to 572 Steffen Thorsen.) 573 574 Changes to past timestamps 575 576 A discrepancy of 4 s in timestamps before 1931 in South Sudan has 577 been corrected. The 'backzone' and 'zone.tab' files did not agree 578 with the 'africa' and 'zone1970.tab' files. (Problem reported by 579 Michael Deckers.) 580 581 The abbreviation invented for Bolivia Summer Time (1931-2) is now 582 BST instead of BOST, to be more consistent with the convention 583 used for Latvian Summer Time (1918-9) and for British Summer Time. 584 585 Changes to tm_isdst 586 587 Change Europe/Dublin so that it observes Irish Standard Time (UT 588 +01) in summer and GMT (as negative daylight-saving) in winter, 589 instead of observing standard time (GMT) in winter and Irish 590 Summer Time (UT +01) in summer. This change does not affect UT 591 offsets or abbreviations; it affects only whether timestamps are 592 considered to be standard time or daylight-saving time, as 593 expressed in the tm_isdst flag of C's struct tm type. 594 (Discrepancy noted by Derick Rethans.) 595 596 Changes to build procedure 597 598 The default installation locations have been changed to mostly 599 match Debian circa 2017, instead of being designed as an add-on to 600 4.3BSD circa 1986. This affects the Makefile macros TOPDIR, 601 TZDIR, MANDIR, and LIBDIR. New Makefile macros TZDEFAULT, USRDIR, 602 USRSHAREDIR, BINDIR, ZDUMPDIR, and ZICDIR let installers tailor 603 locations more precisely. (This responds to suggestions from 604 Brian Inglis and from Steve Summit.) 605 606 The default installation procedure no longer creates the 607 backward-compatibility link US/Pacific-New, which causes 608 confusion during user setup (e.g., see Debian bug 815200). 609 Use 'make BACKWARD="backward pacificnew"' to create the link 610 anyway, for now. Eventually we plan to remove the link entirely. 611 612 tzdata.zi now contains a version-number comment. 613 (Suggested by Tom Lane.) 614 615 The Makefile now quotes values like BACKWARD more carefully when 616 passing them to the shell. (Problem reported by Zefram.) 617 618 Builders no longer need to specify -DHAVE_SNPRINTF on platforms 619 that have snprintf and use pre-C99 compilers. (Problem reported 620 by Jon Skeet.) 621 622 Changes to code 623 624 zic has a new option -t FILE that specifies the location of the 625 file that determines local time when TZ is unset. The default for 626 this location can be configured via the new TZDEFAULT makefile 627 macro, which defaults to /etc/localtime. 628 629 Diagnostics and commentary now distinguish UT from UTC more 630 carefully; see theory.html for more information about UT vs UTC. 631 632 zic has been ported to GCC 8's -Wstringop-truncation option. 633 (Problem reported by Martin Sebor.) 634 635 Changes to documentation and commentary 636 637 The zic man page now documents the longstanding behavior that 638 times and years can be out of the usual range, with negative times 639 counting backwards from midnight and with year 0 preceding year 1. 640 (Problem reported by Michael Deckers.) 641 642 The theory.html file now mentions the POSIX limit of six chars 643 per abbreviation, and lists alphabetic abbreviations used. 644 645 The files tz-art.htm and tz-link.htm have been renamed to 646 tz-art.html and tz-link.html, respectively, for consistency with 647 other file names and to simplify web server configuration. 648 649 650 Release 2017c - 2017-10-20 14:49:34 -0700 651 652 Briefly: 653 Northern Cyprus switches from +03 to +02/+03 on 2017-10-29. 654 Fiji ends DST 2018-01-14, not 2018-01-21. 655 Namibia switches from +01/+02 to +02 on 2018-04-01. 656 Sudan switches from +03 to +02 on 2017-11-01. 657 Tonga likely switches from +13/+14 to +13 on 2017-11-05. 658 Turks & Caicos switches from -04 to -05/-04 on 2018-11-04. 659 A new file tzdata.zi now holds a small text copy of all data. 660 The zic input format has been regularized slightly. 661 662 Changes to future timestamps 663 664 Northern Cyprus has decided to resume EU rules starting 665 2017-10-29, thus reinstituting winter time. 666 667 Fiji ends DST 2018-01-14 instead of the 2018-01-21 previously 668 predicted. (Thanks to Dominic Fok.) Adjust future predictions 669 accordingly. 670 671 Namibia will switch from +01 with DST to +02 all year on 672 2017-09-03 at 02:00. This affects UT offsets starting 2018-04-01 673 at 02:00. (Thanks to Steffen Thorsen.) 674 675 Sudan will switch from +03 to +02 on 2017-11-01. (Thanks to Ahmed 676 Atyya and Yahia Abdalla.) South Sudan is not switching, so 677 Africa/Juba is no longer a link to Africa/Khartoum. 678 679 Tonga has likely ended its experiment with DST, and will not 680 adjust its clocks on 2017-11-05. Although Tonga has not announced 681 whether it will continue to observe DST, the IATA is assuming that 682 it will not. (Thanks to David Wade.) 683 684 Turks & Caicos will switch from -04 all year to -05 with US DST on 685 2018-03-11 at 03:00. This affects UT offsets starting 2018-11-04 686 at 02:00. (Thanks to Steffen Thorsen.) 687 688 Changes to past timestamps 689 690 Namibia switched from +02 to +01 on 1994-03-21, not 1994-04-03. 691 (Thanks to Arthur David Olson.) 692 693 Detroit did not observe DST in 1967. 694 695 Use railway time for Asia/Kolkata before 1941, by switching to 696 Madras local time (UT +052110) in 1870, then to IST (UT +0530) in 697 1906. Also, treat 1941-2's +0630 as DST, like 1942-5. 698 699 Europe/Dublin's 1946 and 1947 fallback transitions occurred at 700 02:00 standard time, not 02:00 DST. (Thanks to Michael Deckers.) 701 702 Pacific/Apia and Pacific/Pago_Pago switched from Antipodean to 703 American time in 1892, not 1879. (Thanks to Michael Deckers.) 704 705 Adjust the 1867 transition in Alaska to better reflect the 706 historical record, by changing it to occur on 1867-10-18 at 15:30 707 Sitka time rather than at the start of 1867-10-17 local time. 708 Although strictly speaking this is accurate only for Sitka, 709 the rest of Alaska's blanks need to be filled in somehow. 710 711 Fix off-by-one errors in UT offsets for Adak and Nome before 1867. 712 (Thanks to Michael Deckers.) 713 714 Add 7 s to the UT offset in Asia/Yangon before 1920. 715 716 Changes to zone names 717 718 Remove Canada/East-Saskatchewan from the 'backward' file, as it 719 exceeded the 14-character limit and was an unused misnomer anyway. 720 721 Changes to build procedure 722 723 To support applications that prefer to read time zone data in text 724 form, two zic input files tzdata.zi and leapseconds are now 725 installed by default. The commands 'zic tzdata.zi' and 'zic -L 726 leapseconds tzdata.zi' can reproduce the tzdata binary files 727 without and with leap seconds, respectively. To prevent these two 728 new files from being installed, use 'make TZDATA_TEXT=', and to 729 suppress leap seconds from the tzdata text installation, use 'make 730 TZDATA_TEXT=tzdata.zi'. 731 732 'make BACKWARD=' now suppresses backward-compatibility names 733 like 'US/Pacific' that are defined in the 'backward' and 734 'pacificnew' files. 735 736 'make check' now works on systems that lack a UTF-8 locale, 737 or that lack the nsgmls program. Set UTF8_LOCALE to configure 738 the name of a UTF-8 locale, if you have one. 739 740 Y2K runtime checks are no longer enabled by default. Add 741 -DDEPRECATE_TWO_DIGIT_YEARS to CFLAGS to enable them, instead of 742 adding -DNO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU 743 to disable them. (New name suggested by Brian Inglis.) 744 745 The build procedure for zdump now works on AIX 7.1. 746 (Problem reported by Kees Dekker.) 747 748 Changes to code 749 750 zic and the reference runtime now reject multiple leap seconds 751 within 28 days of each other, or leap seconds before the Epoch. 752 As a result, support for double leap seconds, which was 753 obsolescent and undocumented, has been removed. Double leap 754 seconds were an error in the C89 standard; they have never existed 755 in civil timekeeping. (Thanks to Robert Elz and Bradley White for 756 noticing glitches in the code that uncovered this problem.) 757 758 zic now warns about use of the obsolescent and undocumented -y 759 option, and about use of the obsolescent TYPE field of Rule lines. 760 761 zic now allows unambiguous abbreviations like "Sa" and "Su" for 762 weekdays; formerly it rejected them due to a bug. Conversely, zic 763 no longer considers non-prefixes to be abbreviations; for example, 764 it no longer accepts "lF" as an abbreviation for "lastFriday". 765 Also, zic warns about the undocumented usage with a "last-" 766 prefix, e.g., "last-Fri". 767 768 Similarly, zic now accepts the unambiguous abbreviation "L" for 769 "Link" in ordinary context and for "Leap" in leap-second context. 770 Conversely, zic no longer accepts non-prefixes such as "La" as 771 abbreviations for words like "Leap". 772 773 zic no longer accepts leap second lines in ordinary input, or 774 ordinary lines in leap second input. Formerly, zic sometimes 775 warned about this undocumented usage and handled it incorrectly. 776 777 The new macro HAVE_TZNAME governs whether the tzname external 778 variable is exported, instead of USG_COMPAT. USG_COMPAT now 779 governs only the external variables "timezone" and "daylight". 780 This change is needed because the three variables are not in the 781 same category: although POSIX requires tzname, it specifies the 782 other two variables as optional. Also, USG_COMPAT is now 1 or 0: 783 if not defined, the code attempts to guess it from other macros. 784 785 localtime.c and difftime.c no longer require stdio.h, and .c files 786 other than zic.c no longer require sys/wait.h. 787 788 zdump.c no longer assumes snprintf. (Reported by Jonathan Leffler.) 789 790 Calculation of time_t extrema works around a bug in GCC 4.8.4 791 (Reported by Stan Shebs and Joseph Myers.) 792 793 zic.c no longer mistranslates formats of line numbers in non-English 794 locales. (Problem reported by Benno Schulenberg.) 795 796 Several minor changes have been made to the code to make it a 797 bit easier to port to MS-Windows and Solaris. (Thanks to Kees 798 Dekker for reporting the problems.) 799 800 Changes to documentation and commentary 801 802 The two new files 'theory.html' and 'calendars' contain the 803 contents of the removed file 'Theory'. The goal is to document 804 tzdb theory more accessibly. 805 806 The zic man page now documents abbreviation rules. 807 808 tz-link.htm now covers how to apply tzdata changes to clients. 809 (Thanks to Jorge Fbregas for the AIX link.) It also mentions MySQL. 810 811 The leap-seconds.list URL has been updated to something that is 812 more reliable for tzdb. (Thanks to Tim Parenti and Brian Inglis.) 813 814 Release 2017b - 2017-03-17 07:30:38 -0700 815 816 Briefly: Haiti has resumed DST. 817 818 Changes to past and future timestamps 819 820 Haiti resumed observance of DST in 2017. (Thanks to Steffen Thorsen.) 821 822 Changes to past timestamps 823 824 Liberia changed from -004430 to +00 on 1972-01-07, not 1972-05-01. 825 826 Use "MMT" to abbreviate Liberia's time zone before 1972, as "-004430" 827 is one byte over the POSIX limit. (Problem reported by Derick Rethans.) 828 829 Changes to code 830 831 The reference localtime implementation now falls back on the 832 current US daylight-saving transition rules rather than the 833 1987-2006 rules. This fallback occurs only when (1) the TZ 834 environment variable has a value like "AST4ADT" that asks 835 for daylight saving time but does not specify the rules, (2) there 836 is no file by that name, and (3) the TZDEFRULES file cannot be 837 loaded. (Thanks to Tom Lane.) 838 839 840 Release 2017a - 2017-02-28 00:05:36 -0800 841 842 Briefly: Southern Chile moves from -04/-03 to -03, and Mongolia 843 discontinues DST. 844 845 Changes to future timestamps 846 847 Mongolia no longer observes DST. (Thanks to Ganbold Tsagaankhuu.) 848 849 Chile's Region of Magallanes moves from -04/-03 to -03 year-round. 850 Its clocks diverge from America/Santiago starting 2017-05-13 at 851 23:00, hiving off a new zone America/Punta_Arenas. Although the 852 Chilean government says this change expires in May 2019, for now 853 assume it's permanent. (Thanks to Juan Correa and Deborah 854 Goldsmith.) This also affects Antarctica/Palmer. 855 856 Changes to past timestamps 857 858 Fix many entries for historical timestamps for Europe/Madrid 859 before 1979, to agree with tables compiled by Pere Planesas of the 860 National Astronomical Observatory of Spain. As a side effect, 861 this changes some timestamps for Africa/Ceuta before 1929, which 862 are probably guesswork anyway. (Thanks to Steve Allen and 863 Pierpaolo Bernardi for the heads-ups, and to Michael Deckers for 864 correcting the 1901 transition.) 865 866 Ecuador observed DST from 1992-11-28 to 1993-02-05. 867 (Thanks to Alois Treindl.) 868 869 Asia/Atyrau and Asia/Oral were at +03 (not +04) before 1930-06-21. 870 (Thanks to Stepan Golosunov.) 871 872 Changes to past and future time zone abbreviations 873 874 Switch to numeric time zone abbreviations for South America, as 875 part of the ongoing project of removing invented abbreviations. 876 This avoids the need to invent an abbreviation for the new Chilean 877 new zone. Similarly, switch from invented to numeric time zone 878 abbreviations for Afghanistan, American Samoa, the Azores, 879 Bangladesh, Bhutan, the British Indian Ocean Territory, Brunei, 880 Cape Verde, Chatham Is, Christmas I, Cocos (Keeling) Is, Cook Is, 881 Dubai, East Timor, Eucla, Fiji, French Polynesia, Greenland, 882 Indochina, Iran, Iraq, Kiribati, Lord Howe, Macquarie, Malaysia, 883 the Maldives, Marshall Is, Mauritius, Micronesia, Mongolia, 884 Myanmar, Nauru, Nepal, New Caledonia, Niue, Norfolk I, Palau, 885 Papua New Guinea, the Philippines, Pitcairn, Qatar, Runion, St 886 Pierre & Miquelon, Samoa, Saudi Arabia, Seychelles, Singapore, 887 Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, Wallis & Futuna, and 888 Xinjiang; for 20-minute daylight saving time in Ghana before 1943; 889 for half-hour daylight saving time in Belize before 1944 and in 890 the Dominican Republic before 1975; and for Canary Islands before 891 1946, for Guinea-Bissau before 1975, for Iceland before 1969, for 892 Indian Summer Time before 1942, for Indonesia before around 1964, 893 for Kenya before 1960, for Liberia before 1973, for Madeira before 894 1967, for Namibia before 1943, for the Netherlands in 1937-9, for 895 Pakistan before 1971, for Western Sahara before 1977, and for 896 Zaporozhye in 1880-1924. 897 898 For Alaska time from 1900 through 1967, instead of "CAT" use the 899 abbreviation "AST", the abbreviation commonly used at the time 900 (Atlantic Standard Time had not been standardized yet). Use "AWT" 901 and "APT" instead of the invented abbreviations "CAWT" and "CAPT". 902 903 Use "CST" and "CDT" instead of invented abbreviations for Macau 904 before 1999 and Taiwan before 1938, and use "JST" instead of the 905 invented abbreviation "JCST" for Japan and Korea before 1938. 906 907 Change to database entry category 908 909 Move the Pacific/Johnston link from 'australasia' to 'backward', 910 since Johnston is now uninhabited. 911 912 Changes to code 913 914 zic no longer mishandles some transitions in January 2038 when it 915 attempts to work around Qt bug 53071. This fixes a bug affecting 916 Pacific/Tongatapu that was introduced in zic 2016e. localtime.c 917 now contains a workaround, useful when loading a file generated by 918 a buggy zic. (Problem and localtime.c fix reported by Bradley 919 White.) 920 921 zdump -i now outputs non-hour numeric time zone abbreviations 922 without a colon, e.g., "+0530" rather than "+05:30". This agrees 923 with zic %z and with common practice, and simplifies auditing of 924 zdump output. 925 926 zdump is now buildable again with -DUSE_LTZ=0. 927 (Problem reported by Joseph Myers.) 928 929 zdump.c now always includes private.h, to avoid code duplication 930 with private.h. (Problem reported by Kees Dekker.) 931 932 localtime.c no longer mishandles early or late timestamps 933 when TZ is set to a POSIX-style string that specifies DST. 934 (Problem reported by Kees Dekker.) 935 936 date and strftime now cause %z to generate "-0000" instead of 937 "+0000" when the UT offset is zero and the time zone abbreviation 938 begins with "-". 939 940 Changes to documentation and commentary 941 942 The 'Theory' file now better documents choice of historical time 943 zone abbreviations. (Problems reported by Michael Deckers.) 944 945 tz-link.htm now covers leap smearing, which is popular in clouds. 946 947 948 Release 2016j - 2016-11-22 23:17:13 -0800 949 950 Briefly: Saratov, Russia moves from +03 to +04 on 2016-12-04. 951 952 Changes to future timestamps 953 954 Saratov, Russia switches from +03 to +04 on 2016-12-04 at 02:00. 955 This hives off a new zone Europe/Saratov from Europe/Volgograd. 956 (Thanks to Yuri Konotopov and Stepan Golosunov.) 957 958 Changes to past timestamps 959 960 The new zone Asia/Atyrau for Atyra Region, Kazakhstan, is like 961 Asia/Aqtau except it switched from +05/+06 to +04/+05 in spring 962 1999, not fall 1994. (Thanks to Stepan Golosunov.) 963 964 Changes to past time zone abbreviations 965 966 Asia/Gaza and Asia/Hebron now use "EEST", not "EET", to denote 967 summer time before 1948. The old use of "EET" was a typo. 968 969 Changes to code 970 971 zic no longer mishandles file systems that lack hard links, fixing 972 bugs introduced in 2016g. (Problems reported by Tom Lane.) 973 Also, when the destination already contains symbolic links, zic 974 should now work better on systems where the 'link' system call 975 does not follow symbolic links. 976 977 Changes to documentation and commentary 978 979 tz-link.htm now documents the relationship between release version 980 numbers and development-repository commit tags. (Suggested by 981 Paul Koning.) 982 983 The 'Theory' file now documents UT. 984 985 iso3166.tab now accents "Curaao", and commentary now mentions 986 the names "Cabo Verde" and "Czechia". (Thanks to Ji Boh.) 987 988 989 Release 2016i - 2016-11-01 23:19:52 -0700 990 991 Briefly: Cyprus split into two time zones on 2016-10-30, and Tonga 992 reintroduces DST on 2016-11-06. 993 994 Changes to future timestamps 995 996 Pacific/Tongatapu begins DST on 2016-11-06 at 02:00, ending on 997 2017-01-15 at 03:00. Assume future observances in Tonga will be 998 from the first Sunday in November through the third Sunday in 999 January, like Fiji. (Thanks to Pulu Anau.) Switch to numeric 1000 time zone abbreviations for this zone. 1001 1002 Changes to past and future timestamps 1003 1004 Northern Cyprus is now +03 year round, causing a split in Cyprus 1005 time zones starting 2016-10-30 at 04:00. This creates a zone 1006 Asia/Famagusta. (Thanks to Even Scharning and Matt Johnson.) 1007 1008 Antarctica/Casey switched from +08 to +11 on 2016-10-22. 1009 (Thanks to Steffen Thorsen.) 1010 1011 Changes to past timestamps 1012 1013 Several corrections were made for pre-1975 timestamps in Italy. 1014 These affect Europe/Malta, Europe/Rome, Europe/San_Marino, and 1015 Europe/Vatican. 1016 1017 First, the 1893-11-01 00:00 transition in Italy used the new UT 1018 offset (+01), not the old (+00:49:56). (Thanks to Michael 1019 Deckers.) 1020 1021 Second, rules for daylight saving in Italy were changed to agree 1022 with Italy's National Institute of Metrological Research (INRiM) 1023 except for 1944, as follows (thanks to Pierpaolo Bernardi, Brian 1024 Inglis, and Michael Deckers): 1025 1026 The 1916-06-03 transition was at 24:00, not 00:00. 1027 1028 The 1916-10-01, 1919-10-05, and 1920-09-19 transitions were at 1029 00:00, not 01:00. 1030 1031 The 1917-09-30 and 1918-10-06 transitions were at 24:00, not 1032 01:00. 1033 1034 The 1944-09-17 transition was at 03:00, not 01:00. This 1035 particular change is taken from Italian law as INRiM's table, 1036 (which says 02:00) appears to have a typo here. Also, keep the 1037 1944-04-03 transition for Europe/Rome, as Rome was controlled by 1038 Germany then. 1039 1040 The 1967-1970 and 1972-1974 fallback transitions were at 01:00, 1041 not 00:00. 1042 1043 Changes to code 1044 1045 The code should now be buildable on AmigaOS merely by setting the 1046 appropriate Makefile variables. (From a patch by Carsten Larsen.) 1047 1048 1049 Release 2016h - 2016-10-19 23:17:57 -0700 1050 1051 Changes to future timestamps 1052 1053 Asia/Gaza and Asia/Hebron end DST on 2016-10-29 at 01:00, not 1054 2016-10-21 at 00:00. (Thanks to Sharef Mustafa.) Predict that 1055 future fall transitions will be on the last Saturday of October 1056 at 01:00, which is consistent with predicted spring transitions 1057 on the last Saturday of March. (Thanks to Tim Parenti.) 1058 1059 Changes to past timestamps 1060 1061 In Turkey, transitions in 1986-1990 were at 01:00 standard time 1062 not at 02:00, and the spring 1994 transition was on March 20, not 1063 March 27. (Thanks to Kvan Yazan.) 1064 1065 Changes to past and future time zone abbreviations 1066 1067 Asia/Colombo now uses numeric time zone abbreviations like "+0530" 1068 instead of alphabetic ones like "IST" and "LKT". Various 1069 English-language sources use "IST", "LKT" and "SLST", with no 1070 working consensus. (Usage of "SLST" mentioned by Sadika 1071 Sumanapala.) 1072 1073 Changes to code 1074 1075 zic no longer mishandles relativizing file names when creating 1076 symbolic links like /etc/localtime, when these symbolic links 1077 are outside the usual directory hierarchy. This fixes a bug 1078 introduced in 2016g. (Problem reported by Andreas Stieger.) 1079 1080 Changes to build procedure 1081 1082 New rules 'traditional_tarballs' and 'traditional_signatures' for 1083 building just the traditional-format distribution. (Requested by 1084 Deborah Goldsmith.) 1085 1086 The file 'version' is now put into the tzdata tarball too. 1087 (Requested by Howard Hinnant.) 1088 1089 Changes to documentation and commentary 1090 1091 The 'Theory' file now has a section on interface stability. 1092 (Requested by Paul Koning.) It also mentions features like 1093 tm_zone and localtime_rz that have long been supported by the 1094 reference code. 1095 1096 tz-link.htm has improved coverage of time zone boundaries suitable 1097 for geolocation. (Thanks to heads-ups from Evan Siroky and Matt 1098 Johnson.) 1099 1100 The US commentary now mentions Allen and the "day of two noons". 1101 1102 The Fiji commentary mentions the government's 2016-10-03 press 1103 release. (Thanks to Raymond Kumar.) 1104 1105 1106 Release 2016g - 2016-09-13 08:56:38 -0700 1107 1108 Changes to future timestamps 1109 1110 Turkey switched from EET/EEST (+02/+03) to permanent +03, 1111 effective 2016-09-07. (Thanks to Burak AYDIN.) Use "+03" rather 1112 than an invented abbreviation for the new time. 1113 1114 New leap second 2016-12-31 23:59:60 UTC as per IERS Bulletin C 52. 1115 (Thanks to Tim Parenti.) 1116 1117 Changes to past timestamps 1118 1119 For America/Los_Angeles, spring-forward transition times have been 1120 corrected from 02:00 to 02:01 in 1948, and from 02:00 to 01:00 in 1121 1950-1966. 1122 1123 For zones using Soviet time on 1919-07-01, transitions to UT-based 1124 time were at 00:00 UT, not at 02:00 local time. The affected 1125 zones are Europe/Kirov, Europe/Moscow, Europe/Samara, and 1126 Europe/Ulyanovsk. (Thanks to Alexander Belopolsky.) 1127 1128 Changes to past and future time zone abbreviations 1129 1130 The Factory zone now uses the time zone abbreviation -00 instead 1131 of a long English-language string, as -00 is now the normal way to 1132 represent an undefined time zone. 1133 1134 Several zones in Antarctica and the former Soviet Union, along 1135 with zones intended for ships at sea that cannot use POSIX TZ 1136 strings, now use numeric time zone abbreviations instead of 1137 invented or obsolete alphanumeric abbreviations. The affected 1138 zones are Antarctica/Casey, Antarctica/Davis, 1139 Antarctica/DumontDUrville, Antarctica/Mawson, Antarctica/Rothera, 1140 Antarctica/Syowa, Antarctica/Troll, Antarctica/Vostok, 1141 Asia/Anadyr, Asia/Ashgabat, Asia/Baku, Asia/Bishkek, Asia/Chita, 1142 Asia/Dushanbe, Asia/Irkutsk, Asia/Kamchatka, Asia/Khandyga, 1143 Asia/Krasnoyarsk, Asia/Magadan, Asia/Omsk, Asia/Sakhalin, 1144 Asia/Samarkand, Asia/Srednekolymsk, Asia/Tashkent, Asia/Tbilisi, 1145 Asia/Ust-Nera, Asia/Vladivostok, Asia/Yakutsk, Asia/Yekaterinburg, 1146 Asia/Yerevan, Etc/GMT-14, Etc/GMT-13, Etc/GMT-12, Etc/GMT-11, 1147 Etc/GMT-10, Etc/GMT-9, Etc/GMT-8, Etc/GMT-7, Etc/GMT-6, Etc/GMT-5, 1148 Etc/GMT-4, Etc/GMT-3, Etc/GMT-2, Etc/GMT-1, Etc/GMT+1, Etc/GMT+2, 1149 Etc/GMT+3, Etc/GMT+4, Etc/GMT+5, Etc/GMT+6, Etc/GMT+7, Etc/GMT+8, 1150 Etc/GMT+9, Etc/GMT+10, Etc/GMT+11, Etc/GMT+12, Europe/Kaliningrad, 1151 Europe/Minsk, Europe/Samara, Europe/Volgograd, and 1152 Indian/Kerguelen. For Europe/Moscow the invented abbreviation MSM 1153 was replaced by +05, whereas MSK and MSD were kept as they are not 1154 our invention and are widely used. 1155 1156 Changes to zone names 1157 1158 Rename Asia/Rangoon to Asia/Yangon, with a backward compatibility link. 1159 (Thanks to David Massoud.) 1160 1161 Changes to code 1162 1163 zic no longer generates binary files containing POSIX TZ-like 1164 strings that disagree with the local time type after the last 1165 explicit transition in the data. This fixes a bug with 1166 Africa/Casablanca and Africa/El_Aaiun in some year-2037 timestamps 1167 on the reference platform. (Thanks to Alexander Belopolsky for 1168 reporting the bug and suggesting a way forward.) 1169 1170 If the installed localtime and/or posixrules files are symbolic 1171 links, zic now keeps them symbolic links when updating them, for 1172 compatibility with platforms like OpenSUSE where other programs 1173 configure these files as symlinks. 1174 1175 zic now avoids hard linking to symbolic links, avoids some 1176 unnecessary mkdir and stat system calls, and uses shorter file 1177 names internally. 1178 1179 zdump has a new -i option to generate transitions in a 1180 more-compact but still human-readable format. This option is 1181 experimental, and the output format may change in future versions. 1182 (Thanks to Jon Skeet for suggesting that an option was needed, 1183 and thanks to Tim Parenti and Chris Rovick for further comments.) 1184 1185 Changes to build procedure 1186 1187 An experimental distribution format is available, in addition 1188 to the traditional format which will continue to be distributed. 1189 The new format is a tarball tzdb-VERSION.tar.lz with signature 1190 file tzdb-VERSION.tar.lz.asc. It unpacks to a top-level directory 1191 tzdb-VERSION containing the code and data of the traditional 1192 two-tarball format, along with extra data that may be useful. 1193 (Thanks to Antonio Diaz Diaz, Oscar van Vlijmen, and many others 1194 for comments about the experimental format.) 1195 1196 The release version number is now more accurate in the usual case 1197 where releases are built from a Git repository. For example, if 1198 23 commits and some working-file changes have been made since 1199 release 2016g, the version number is now something like 1200 '2016g-23-g50556e3-dirty' instead of the misleading '2016g'. 1201 Tagged releases use the same version number format as before, 1202 e.g., '2016g'. To support the more-accurate version number, its 1203 specification has moved from a line in the Makefile to a new 1204 source file 'version'. 1205 1206 The experimental distribution contains a file to2050.tzs that 1207 contains what should be the output of 'zdump -i -c 2050' on 1208 primary zones. If this file is available, 'make check' now checks 1209 that zdump generates this output. 1210 1211 'make check_web' now works on Fedora-like distributions. 1212 1213 Changes to documentation and commentary 1214 1215 tzfile.5 now documents the new restriction on POSIX TZ-like 1216 strings that is now implemented by zic. 1217 1218 Comments now cite URLs for some 1917-1921 Russian DST decrees. 1219 (Thanks to Alexander Belopolsky.) 1220 1221 tz-link.htm mentions JuliaTime (thanks to Curtis Vogt) and Time4J 1222 (thanks to Meno Hochschild) and ThreeTen-Extra, and its 1223 description of Java 8 has been brought up to date (thanks to 1224 Stephen Colebourne). Its description of local time on Mars has 1225 been updated to match current practice, and URLs have been updated 1226 and some obsolete ones removed. 1227 1228 1229 Release 2016f - 2016-07-05 16:26:51 +0200 1230 1231 Changes affecting future timestamps 1232 1233 The Egyptian government changed its mind on short notice, and 1234 Africa/Cairo will not introduce DST starting 2016-07-07 after all. 1235 (Thanks to Mina Samuel.) 1236 1237 Asia/Novosibirsk switches from +06 to +07 on 2016-07-24 at 02:00. 1238 (Thanks to Stepan Golosunov.) 1239 1240 Changes to past and future timestamps 1241 1242 Asia/Novokuznetsk and Asia/Novosibirsk now use numeric time zone 1243 abbreviations instead of invented ones. 1244 1245 Changes affecting past timestamps 1246 1247 Europe/Minsk's 1992-03-29 spring-forward transition was at 02:00 not 00:00. 1248 (Thanks to Stepan Golosunov.) 1249 1250 1251 Release 2016e - 2016-06-14 08:46:16 -0700 1252 1253 Changes affecting future timestamps 1254 1255 Africa/Cairo observes DST in 2016 from July 7 to the end of October. 1256 Guess October 27 and 24:00 transitions. (Thanks to Steffen Thorsen.) 1257 For future years, guess April's last Thursday to October's last 1258 Thursday except for Ramadan. 1259 1260 Changes affecting past timestamps 1261 1262 Locations while uninhabited now use '-00', not 'zzz', as a 1263 placeholder time zone abbreviation. This is inspired by Internet 1264 RFC 3339 and is more consistent with numeric time zone 1265 abbreviations already used elsewhere. The change affects several 1266 arctic and antarctic locations, e.g., America/Cambridge_Bay before 1267 1920 and Antarctica/Troll before 2005. 1268 1269 Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was 1270 at 03:00, not 23:00 the previous day. (Thanks to Michael Deckers.) 1271 1272 Changes to code 1273 1274 zic now outputs a dummy transition at time 2**31 - 1 in zones 1275 whose POSIX-style TZ strings contain a '<'. This mostly works 1276 around Qt bug 53071 <https://bugreports.qt.io/browse/QTBUG-53071>. 1277 (Thanks to Zhanibek Adilbekov for reporting the Qt bug.) 1278 1279 Changes affecting documentation and commentary 1280 1281 tz-link.htm says why governments should give plenty of notice for 1282 time zone or DST changes, and refers to Matt Johnson's blog post. 1283 1284 tz-link.htm mentions Tzdata for Elixir. (Thanks to Matt Johnson.) 1285 1286 1287 Release 2016d - 2016-04-17 22:50:29 -0700 1288 1289 Changes affecting future timestamps 1290 1291 America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30. 1292 (Thanks to Alexander Krivenyshev for the heads-up.) 1293 1294 Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00. 1295 (Thanks to Alexander Krivenyshev and Matt Johnson.) 1296 1297 New zone Asia/Tomsk, split off from Asia/Novosibirsk. It covers 1298 Tomsk Oblast, Russia, which switches from +06 to +07 on 2016-05-29 1299 at 02:00. (Thanks to Stepan Golosunov.) 1300 1301 Changes affecting past timestamps 1302 1303 New zone Europe/Kirov, split off from Europe/Volgograd. It covers 1304 Kirov Oblast, Russia, which switched from +04/+05 to +03/+04 on 1305 1989-03-26 at 02:00, roughly a year after Europe/Volgograd made 1306 the same change. (Thanks to Stepan Golosunov.) 1307 1308 Russia and nearby locations had daylight-saving transitions on 1309 1992-03-29 at 02:00 and 1992-09-27 at 03:00, instead of on 1310 1992-03-28 at 23:00 and 1992-09-26 at 23:00. (Thanks to Stepan 1311 Golosunov.) 1312 1313 Many corrections to historical time in Kazakhstan from 1991 1314 through 2005. (Thanks to Stepan Golosunov.) Replace Kazakhstan's 1315 invented time zone abbreviations with numeric abbreviations. 1316 1317 Changes to commentary 1318 1319 Mention Internet RFCs 7808 (TZDIST) and 7809 (CalDAV time zone references). 1320 1321 1322 Release 2016c - 2016-03-23 00:51:27 -0700 1323 1324 Changes affecting future timestamps 1325 1326 Azerbaijan no longer observes DST. (Thanks to Steffen Thorsen.) 1327 1328 Chile reverts from permanent to seasonal DST. (Thanks to Juan 1329 Correa for the heads-up, and to Tim Parenti for corrections.) 1330 Guess that future transitions are August's and May's second 1331 Saturdays at 24:00 mainland time. Also, call the period from 1332 2014-09-07 through 2016-05-14 daylight saving time instead of 1333 standard time, as that seems more appropriate now. 1334 1335 Changes affecting past timestamps 1336 1337 Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to 1338 +02/+03 on 1989-03-26, not 1991-03-31. Europe/Volgograd changed 1339 from +04/+05 to +03/+04 on 1988-03-27, not 1989-03-26. 1340 (Thanks to Stepan Golosunov.) 1341 1342 Changes to commentary 1343 1344 Several updates and URLs for historical and proposed Russian changes. 1345 (Thanks to Stepan Golosunov, Matt Johnson, and Alexander Krivenyshev.) 1346 1347 1348 Release 2016b - 2016-03-12 17:30:14 -0800 1349 1350 Compatibility note 1351 1352 Starting with release 2016b, some data entries cause zic implementations 1353 derived from tz releases 2005j through 2015e to issue warnings like 1354 "time zone abbreviation differs from POSIX standard (+03)". 1355 These warnings should not otherwise affect zic's output and can safely be 1356 ignored on today's platforms, as the warnings refer to a restriction in 1357 POSIX.1-1988 that was removed in POSIX.1-2001. One way to suppress the 1358 warnings is to upgrade to zic derived from tz releases 2015f and later. 1359 1360 Changes affecting future timestamps 1361 1362 New zones Europe/Astrakhan and Europe/Ulyanovsk for Astrakhan and 1363 Ulyanovsk Oblasts, Russia, both of which will switch from +03 to +04 on 1364 2016-03-27 at 02:00 local time. They need distinct zones since their 1365 post-1970 histories disagree. New zone Asia/Barnaul for Altai Krai and 1366 Altai Republic, Russia, which will switch from +06 to +07 on the same date 1367 and local time. The Astrakhan change is already official; the others have 1368 passed the first reading in the State Duma and are extremely likely. 1369 Also, Asia/Sakhalin moves from +10 to +11 on 2016-03-27 at 02:00. 1370 (Thanks to Alexander Krivenyshev for the heads-up, and to Matt Johnson 1371 and Stepan Golosunov for followup.) 1372 1373 As a trial of a new system that needs less information to be made up, 1374 the new zones use numeric time zone abbreviations like "+04" 1375 instead of invented abbreviations like "ASTT". 1376 1377 Haiti will not observe DST in 2016. (Thanks to Jean Antoine via 1378 Steffen Thorsen.) 1379 1380 Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00. 1381 (Thanks to Hannah Kreitem.) Guess future transitions will be March's last 1382 Saturday at 01:00, not March's last Friday at 24:00. 1383 1384 Changes affecting past timestamps 1385 1386 Europe/Chisinau observed DST during 1990, and switched from +04 to 1387 +03 at 1990-05-06 02:00, instead of switching from +03 to +02. 1388 (Thanks to Stepan Golosunov.) 1389 1390 1991 abbreviations in Europe/Samara should be SAMT/SAMST, not 1391 KUYT/KUYST. (Thanks to Stepan Golosunov.) 1392 1393 Changes to code 1394 1395 tzselect's diagnostics and checking, and checktab.awk's checking, 1396 have been improved. (Thanks to J William Piggott.) 1397 1398 tzcode now builds under MinGW. (Thanks to Ian Abbott and Esben Haabendal.) 1399 1400 tzselect now tests Julian-date TZ settings more accurately. 1401 (Thanks to J William Piggott.) 1402 1403 Changes to commentary 1404 1405 Comments in zone tables have been improved. (Thanks to J William Piggott.) 1406 1407 tzselect again limits its menu comments so that menus fit on a 1408 2480 alphanumeric display. 1409 1410 A new web page tz-how-to.html. (Thanks to Bill Seymour.) 1411 1412 In the Theory file, the description of possible time zone abbreviations in 1413 tzdata has been cleaned up, as the old description was unclear and 1414 inconsistent. (Thanks to Alain Mouette for reporting the problem.) 1415 1416 1417 Release 2016a - 2016-01-26 23:28:02 -0800 1418 1419 Changes affecting future timestamps 1420 1421 America/Cayman will not observe daylight saving this year after all. 1422 Revert our guess that it would. (Thanks to Matt Johnson.) 1423 1424 Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00. 1425 (Thanks to Alexander Krivenyshev.) 1426 1427 Asia/Tehran now has DST predictions for the year 2038 and later, 1428 to be March 21 00:00 to September 21 00:00. This is likely better 1429 than predicting no DST, albeit off by a day every now and then. 1430 1431 Changes affecting past and future timestamps 1432 1433 America/Metlakatla switched from PST all year to AKST/AKDT on 1434 2015-11-01 at 02:00. (Thanks to Steffen Thorsen.) 1435 1436 America/Santa_Isabel has been removed, and replaced with a 1437 backward compatibility link to America/Tijuana. Its contents were 1438 apparently based on a misreading of Mexican legislation. 1439 1440 Changes affecting past timestamps 1441 1442 Asia/Karachi's two transition times in 2002 were off by a minute. 1443 (Thanks to Matt Johnson.) 1444 1445 Changes affecting build procedure 1446 1447 An installer can now combine leap seconds with use of the backzone file, 1448 e.g., with 'make PACKRATDATA=backzone REDO=posix_right zones'. 1449 The old 'make posix_packrat' rule is now marked as obsolescent. 1450 (Thanks to Ian Abbott for an initial implementation.) 1451 1452 Changes affecting documentation and commentary 1453 1454 A new file LICENSE makes it easier to see that the code and data 1455 are mostly public-domain. (Thanks to James Knight.) The three 1456 non-public-domain files now use the current (3-clause) BSD license 1457 instead of older versions of that license. 1458 1459 tz-link.htm mentions the BDE library (thanks to Andrew Paprocki), 1460 CCTZ (thanks to Tim Parenti), TimeJones.com, and has a new section 1461 on editing tz source files (with a mention of Sublime zoneinfo, 1462 thanks to Gilmore Davidson). 1463 1464 The Theory and asia files now mention the 2015 book "The Global 1465 Transformation of Time, 1870-1950", and cite a couple of reviews. 1466 1467 The America/Chicago entry now documents the informal use of US 1468 central time in Fort Pierre, South Dakota. (Thanks to Rick 1469 McDermid, Matt Johnson, and Steve Jones.) 1470 1471 1472 Release 2015g - 2015-10-01 00:39:51 -0700 1473 1474 Changes affecting future timestamps 1475 1476 Turkey's 2015 fall-back transition is scheduled for Nov. 8, not Oct. 25. 1477 (Thanks to Fatih.) 1478 1479 Norfolk moves from +1130 to +1100 on 2015-10-04 at 02:00 local time. 1480 (Thanks to Alexander Krivenyshev.) 1481 1482 Fiji's 2016 fall-back transition is scheduled for January 17, not 24. 1483 (Thanks to Ken Rylander.) 1484 1485 Fort Nelson, British Columbia will not fall back on 2015-11-01. It has 1486 effectively been on MST (-0700) since it advanced its clocks on 2015-03-08. 1487 New zone America/Fort_Nelson. (Thanks to Matt Johnson.) 1488 1489 Changes affecting past timestamps 1490 1491 Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00. 1492 1493 Changes affecting code 1494 1495 localtime no longer mishandles America/Anchorage after 2037. 1496 (Thanks to Bradley White for reporting the bug.) 1497 1498 On hosts with signed 32-bit time_t, localtime no longer mishandles 1499 Pacific/Fiji after 2038-01-16 14:00 UTC. 1500 1501 The localtime module allows the variables 'timezone', 'daylight', 1502 and 'altzone' to be in common storage shared with other modules, 1503 and declares them in case the system <time.h> does not. 1504 (Problems reported by Kees Dekker.) 1505 1506 On platforms with tm_zone, strftime.c now assumes it is not NULL. 1507 This simplifies the code and is consistent with zdump.c. 1508 (Problem reported by Christos Zoulas.) 1509 1510 Changes affecting documentation 1511 1512 The tzfile man page now documents that transition times denote the 1513 starts (not the ends) of the corresponding time periods. 1514 (Ambiguity reported by Bill Seymour.) 1515 1516 1517 Release 2015f - 2015-08-10 18:06:56 -0700 1518 1519 Changes affecting future timestamps 1520 1521 North Korea switches to +0830 on 2015-08-15. (Thanks to Steffen Thorsen.) 1522 The abbreviation remains "KST". (Thanks to Robert Elz.) 1523 1524 Uruguay no longer observes DST. (Thanks to Steffen Thorsen 1525 and Pablo Camargo.) 1526 1527 Changes affecting past and future timestamps 1528 1529 Moldova starts and ends DST at 00:00 UTC, not at 01:00 UTC. 1530 (Thanks to Roman Tudos.) 1531 1532 Changes affecting data format and code 1533 1534 zic's '-y YEARISTYPE' option is no longer documented. The TYPE 1535 field of a Rule line should now be '-'; the old values 'even', 1536 'odd', 'uspres', 'nonpres', 'nonuspres' were already undocumented. 1537 Although the implementation has not changed, these features do not 1538 work in the default installation, they are not used in the data, 1539 and they are now considered obsolescent. 1540 1541 zic now checks that two rules don't take effect at the same time. 1542 (Thanks to Jon Skeet and Arthur David Olson.) Constraints on 1543 simultaneity are now documented. 1544 1545 The two characters '%z' in a zone format now stand for the UT 1546 offset, e.g., '-07' for seven hours behind UT and '+0530' for 1547 five hours and thirty minutes ahead. This better supports time 1548 zone abbreviations conforming to POSIX.1-2001 and later. 1549 1550 Changes affecting installed data files 1551 1552 Comments for America/Halifax and America/Glace_Bay have been improved. 1553 (Thanks to Brian Inglis.) 1554 1555 Data entries have been simplified for Atlantic/Canary, Europe/Simferopol, 1556 Europe/Sofia, and Europe/Tallinn. This yields slightly smaller 1557 installed data files for Europe/Simferopol and Europe/Tallinn. 1558 It does not affect timestamps. (Thanks to Howard Hinnant.) 1559 1560 Changes affecting code 1561 1562 zdump and zic no longer warn about valid time zone abbreviations 1563 like '-05'. 1564 1565 Some Visual Studio 2013 warnings have been suppressed. 1566 (Thanks to Kees Dekker.) 1567 1568 'date' no longer sets the time of day and its -a, -d, -n and -t 1569 options have been removed. Long obsolescent, the implementation 1570 of these features had porting problems. Builders no longer need 1571 to configure HAVE_ADJTIME, HAVE_SETTIMEOFDAY, or HAVE_UTMPX_H. 1572 (Thanks to Kees Dekker for pointing out the problem.) 1573 1574 Changes affecting documentation 1575 1576 The Theory file mentions naming issues earlier, as these seem to be 1577 poorly publicized (thanks to Gilmore Davidson for reporting the problem). 1578 1579 tz-link.htm mentions Time Zone Database Parser (thanks to Howard Hinnant). 1580 1581 Mention that Herbert Samuel introduced the term "Summer Time". 1582 1583 1584 Release 2015e - 2015-06-13 10:56:02 -0700 1585 1586 Changes affecting future timestamps 1587 1588 Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00, 1589 not 06-13 and 07-18 as we had guessed. (Thanks to Milamber.) 1590 1591 Assume Cayman Islands will observe DST starting next year, using US rules. 1592 Although it isn't guaranteed, it is the most likely. 1593 1594 Changes affecting data format 1595 1596 The file 'iso3166.tab' now uses UTF-8, so that its entries can better 1597 spell the names of land Islands, Cte d'Ivoire, and Runion. 1598 1599 Changes affecting code 1600 1601 When displaying data, tzselect converts it to the current locale's 1602 encoding if the iconv command works. (Problem reported by random832.) 1603 1604 tzselect no longer mishandles Dominica, fixing a bug introduced 1605 in Release 2014f. (Problem reported by Owen Leibman.) 1606 1607 zic -l no longer fails when compiled with -DTZDEFAULT=\"/etc/localtime\". 1608 This fixes a bug introduced in Release 2014f. 1609 (Problem reported by Leonardo Chiquitto.) 1610 1611 1612 Release 2015d - 2015-04-24 08:09:46 -0700 1613 1614 Changes affecting future timestamps 1615 1616 Egypt will not observe DST in 2015 and will consider canceling it 1617 permanently. For now, assume no DST indefinitely. 1618 (Thanks to Ahmed Nazmy and Tim Parenti.) 1619 1620 Changes affecting past timestamps 1621 1622 America/Whitehorse switched from UT -09 to -08 on 1967-05-28, not 1623 1966-07-01. Also, Yukon's time zone history is documented better. 1624 (Thanks to Brian Inglis and Dennis Ferguson.) 1625 1626 Change affecting past and future time zone abbreviations 1627 1628 The abbreviations for Hawaii-Aleutian standard and daylight times 1629 have been changed from HAST/HADT to HST/HDT, as per US Government 1630 Printing Office style. This affects only America/Adak since 1983, 1631 as America/Honolulu was already using the new style. 1632 1633 Changes affecting code 1634 1635 zic has some minor performance improvements. 1636 1637 1638 Release 2015c - 2015-04-11 08:55:55 -0700 1639 1640 Changes affecting future timestamps 1641 1642 Egypt's spring-forward transition is at 24:00 on April's last Thursday, 1643 not 00:00 on April's last Friday. 2015's transition will therefore be on 1644 Thursday, April 30 at 24:00, not Friday, April 24 at 00:00. Similar fixes 1645 apply to 2026, 2037, 2043, etc. (Thanks to Steffen Thorsen.) 1646 1647 Changes affecting past timestamps 1648 1649 The following changes affect some pre-1991 Chile-related timestamps 1650 in America/Santiago, Antarctica/Palmer, and Pacific/Easter. 1651 1652 The 1910 transition was January 10, not January 1. 1653 1654 The 1918 transition was September 10, not September 1. 1655 1656 The UT -04 time observed from 1932 to 1942 is now considered to 1657 be standard time, not year-round DST. 1658 1659 Santiago observed DST (UT -03) from 1946-07-15 through 1660 1946-08-31, then reverted to standard time, then switched to -05 1661 on 1947-04-01. 1662 1663 Assume transitions before 1968 were at 00:00, since we have no data 1664 saying otherwise. 1665 1666 The spring 1988 transition was 1988-10-09, not 1988-10-02. 1667 The fall 1990 transition was 1990-03-11, not 1990-03-18. 1668 1669 Assume no UT offset change for Pacific/Easter on 1890-01-01, 1670 and omit all transitions on Pacific/Easter from 1942 through 1946 1671 since we have no data suggesting that they existed. 1672 1673 One more zone has been turned into a link, as it differed 1674 from an existing zone only for older timestamps. As usual, 1675 this change affects UT offsets in pre-1970 timestamps only. 1676 The zone's old contents have been moved to the 'backzone' file. 1677 The affected zone is America/Montreal. 1678 1679 Changes affecting commentary 1680 1681 Mention the TZUpdater tool. 1682 1683 Mention "The Time Now". (Thanks to Brandon Ramsey.) 1684 1685 1686 Release 2015b - 2015-03-19 23:28:11 -0700 1687 1688 Changes affecting future timestamps 1689 1690 Mongolia will start observing DST again this year, from the last 1691 Saturday in March at 02:00 to the last Saturday in September at 00:00. 1692 (Thanks to Ganbold Tsagaankhuu.) 1693 1694 Palestine will start DST on March 28, not March 27. Also, 1695 correct the fall 2014 transition from September 26 to October 24. 1696 Adjust future predictions accordingly. (Thanks to Steffen Thorsen.) 1697 1698 Changes affecting past timestamps 1699 1700 The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a 1701 regression. (Thanks to Stuart Bishop for reporting the problem.) 1702 1703 Some more zones have been turned into links, when they differed 1704 from existing zones only for older timestamps. As usual, 1705 these changes affect UT offsets in pre-1970 timestamps only. 1706 Their old contents have been moved to the 'backzone' file. 1707 The affected zones are: America/Antigua, America/Cayman, 1708 Pacific/Midway, and Pacific/Saipan. 1709 1710 Changes affecting time zone abbreviations 1711 1712 Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD". 1713 (Thanks to Hank W.) 1714 1715 Changes affecting code 1716 1717 Fix integer overflow bug in reference 'mktime' implementation. 1718 (Problem reported by Jrg Richter.) 1719 1720 Allow -Dtime_tz=time_t compilations, and allow -Dtime_tz=... libraries 1721 to be used in the same executable as standard-library time_t functions. 1722 (Problems reported by Bradley White.) 1723 1724 Changes affecting commentary 1725 1726 Cite the recent Mexican decree changing Quintana Roo's time zone. 1727 (Thanks to Carlos Ral Perasso.) 1728 1729 Likewise for the recent Chilean decree. (Thanks to Eduardo Romero Urra.) 1730 1731 Update info about Mars time. 1732 1733 1734 Release 2015a - 2015-01-29 22:35:20 -0800 1735 1736 Changes affecting future timestamps 1737 1738 The Mexican state of Quintana Roo, represented by America/Cancun, 1739 will shift from Central Time with DST to Eastern Time without DST 1740 on 2015-02-01 at 02:00. (Thanks to Steffen Thorsen and Gwillim Law.) 1741 1742 Chile will not change clocks in April or thereafter; its new standard time 1743 will be its old daylight saving time. This affects America/Santiago, 1744 Pacific/Easter, and Antarctica/Palmer. (Thanks to Juan Correa.) 1745 1746 New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49. 1747 (Thanks to Tim Parenti.) 1748 1749 Changes affecting past timestamps 1750 1751 Iceland observed DST in 1919 and 1921, and its 1939 fallback 1752 transition was Oct. 29, not Nov. 29. Remove incorrect data from 1753 Shanks about time in Iceland between 1837 and 1908. 1754 1755 Some more zones have been turned into links, when they differed 1756 from existing zones only for older timestamps. As usual, 1757 these changes affect UT offsets in pre-1970 timestamps only. 1758 Their old contents have been moved to the 'backzone' file. 1759 The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait, 1760 and Asia/Muscat. 1761 1762 Changes affecting code 1763 1764 tzalloc now scrubs time zone abbreviations compatibly with the way 1765 that tzset always has, by replacing invalid bytes with '_' and by 1766 shortening too-long abbreviations. 1767 1768 tzselect ports to POSIX awk implementations, no longer mishandles 1769 POSIX TZ settings when GNU awk is used, and reports POSIX TZ 1770 settings to the user. (Thanks to Stefan Kuhn.) 1771 1772 Changes affecting build procedure 1773 1774 'make check' now checks for links to links in the data. 1775 One such link (for Africa/Asmera) has been fixed. 1776 (Thanks to Stephen Colebourne for pointing out the problem.) 1777 1778 Changes affecting commentary 1779 1780 The leapseconds file commentary now mentions the expiration date. 1781 (Problem reported by Martin Burnicki.) 1782 1783 Update Mexican Library of Congress URL. 1784 1785 1786 Release 2014j - 2014-11-10 17:37:11 -0800 1787 1788 Changes affecting current and future timestamps 1789 1790 Turks & Caicos' switch from US eastern time to UT -04 year-round 1791 did not occur on 2014-11-02 at 02:00. It's currently scheduled 1792 for 2015-11-01 at 02:00. (Thanks to Chris Walton.) 1793 1794 Changes affecting past timestamps 1795 1796 Many pre-1989 timestamps have been corrected for Asia/Seoul and 1797 Asia/Pyongyang, based on sources for the Korean-language Wikipedia 1798 entry for time in Korea. (Thanks to Sanghyuk Jung.) Also, no 1799 longer guess that Pyongyang mimicked Seoul time after World War II, 1800 as this is politically implausible. 1801 1802 Some more zones have been turned into links, when they differed 1803 from existing zones only for older timestamps. As usual, 1804 these changes affect UT offsets in pre-1970 timestamps only. 1805 Their old contents have been moved to the 'backzone' file. 1806 The affected zones are: Africa/Addis_Ababa, Africa/Asmara, 1807 Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Kampala, 1808 Africa/Mogadishu, Indian/Antananarivo, Indian/Comoro, and 1809 Indian/Mayotte. 1810 1811 Changes affecting commentary 1812 1813 The commentary is less enthusiastic about Shanks as a source, 1814 and is more careful to distinguish UT from UTC. 1815 1816 1817 Release 2014i - 2014-10-21 22:04:57 -0700 1818 1819 Changes affecting future timestamps 1820 1821 Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00. 1822 (Thanks to Ken Rylander for the heads-up.) Guess that future 1823 years will use a similar pattern. 1824 1825 A new Zone Pacific/Bougainville, for the part of Papua New Guinea 1826 that plans to switch from UT +10 to +11 on 2014-12-28 at 02:00. 1827 (Thanks to Kiley Walbom for the heads-up.) 1828 1829 Changes affecting time zone abbreviations 1830 1831 Since Belarus is not changing its clocks even though Moscow is, 1832 the time zone abbreviation in Europe/Minsk is changing from FET 1833 to its more-traditional value MSK on 2014-10-26 at 01:00. 1834 (Thanks to Alexander Bokovoy for the heads-up about Belarus.) 1835 1836 The new abbreviation IDT stands for the pre-1976 use of UT +08 in 1837 Indochina, to distinguish it better from ICT (+07). 1838 1839 Changes affecting past timestamps 1840 1841 Many timestamps have been corrected for Asia/Ho_Chi_Minh before 1976 1842 (thanks to Trn Ngc Qun for an indirect pointer to Trn Tin Bnh's 1843 authoritative book). Asia/Ho_Chi_Minh has been added to 1844 zone1970.tab, to give tzselect users in Vietnam two choices, 1845 since north and south Vietnam disagreed after our 1970 cutoff. 1846 1847 Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as 1848 they differed from existing zones only for older timestamps. As 1849 usual, these changes affect pre-1970 timestamps only. Their old 1850 contents have been moved to the 'backzone' file. 1851 1852 Changes affecting code 1853 1854 The time-related library functions now set errno on failure, and 1855 some crashes in the new tzalloc-related library functions have 1856 been fixed. (Thanks to Christos Zoulas for reporting most of 1857 these problems and for suggesting fixes.) 1858 1859 If USG_COMPAT is defined and the requested timestamp is standard time, 1860 the tz library's localtime and mktime functions now set the extern 1861 variable timezone to a value appropriate for that timestamp; and 1862 similarly for ALTZONE, daylight saving time, and the altzone variable. 1863 This change is a companion to the tzname change in 2014h, and is 1864 designed to make timezone and altzone more compatible with tzname. 1865 1866 The tz library's functions now set errno to EOVERFLOW if they fail 1867 because the result cannot be represented. ctime and ctime_r now 1868 return NULL and set errno when a timestamp is out of range, rather 1869 than having undefined behavior. 1870 1871 Some bugs associated with the new 2014g functions have been fixed. 1872 This includes a bug that largely incapacitated the new functions 1873 time2posix_z and posix2time_z. (Thanks to Christos Zoulas.) 1874 It also includes some uses of uninitialized variables after tzalloc. 1875 The new code uses the standard type 'ssize_t', which the Makefile 1876 now gives porting advice about. 1877 1878 Changes affecting commentary 1879 1880 Updated URLs for NRC Canada (thanks to Matt Johnson and Brian Inglis). 1881 1882 1883 Release 2014h - 2014-09-25 18:59:03 -0700 1884 1885 Changes affecting past timestamps 1886 1887 America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28. 1888 1889 Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01, 1890 not 1920-01-06. The old entry was based on a misinterpretation of Shanks. 1891 1892 Some more zones have been turned into links, when they differed 1893 from existing zones only for older timestamps. As usual, 1894 these changes affect UT offsets in pre-1970 timestamps only. 1895 Their old contents have been moved to the 'backzone' file. 1896 The affected zones are: Africa/Blantyre, Africa/Bujumbura, 1897 Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi, 1898 Africa/Lusaka, Africa/Maseru, and Africa/Mbabane. 1899 1900 Changes affecting code 1901 1902 zdump -V and -v now output gmtoff= values on all platforms, 1903 not merely on platforms defining TM_GMTOFF. 1904 1905 The tz library's localtime and mktime functions now set tzname to a value 1906 appropriate for the requested timestamp, and zdump now uses this 1907 on platforms not defining TM_ZONE, fixing a 2014g regression. 1908 (Thanks to Tim Parenti for reporting the problem.) 1909 1910 The tz library no longer sets tzname if localtime or mktime fails. 1911 1912 zdump -c no longer mishandles transitions near year boundaries. 1913 (Thanks to Tim Parenti for reporting the problem.) 1914 1915 An access to uninitialized data has been fixed. 1916 (Thanks to Jrg Richter for reporting the problem.) 1917 1918 When THREAD_SAFE is defined, the code ports to the C11 memory model. 1919 A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined 1920 and two threads race to initialize data used by gmtime-like functions. 1921 (Thanks to Andy Heninger for reporting the problems.) 1922 1923 Changes affecting build procedure 1924 1925 'make check' now checks better for properly-sorted data. 1926 1927 Changes affecting documentation and commentary 1928 1929 zdump's gmtoff=N output is now documented, and its isdst=D output 1930 is now documented to possibly output D values other than 0 or 1. 1931 1932 zdump -c's treatment of years is now documented to use the 1933 Gregorian calendar and Universal Time without leap seconds, 1934 and its behavior at cutoff boundaries is now documented better. 1935 (Thanks to Arthur David Olson and Tim Parenti for reporting the problems.) 1936 1937 Programs are now documented to use the proleptic Gregorian calendar. 1938 (Thanks to Alan Barrett for the suggestion.) 1939 1940 Fractional-second GMT offsets have been documented for civil time 1941 in 19th-century Chennai, Jakarta, and New York. 1942 1943 1944 Release 2014g - 2014-08-28 12:31:23 -0700 1945 1946 Changes affecting future timestamps 1947 1948 Turks & Caicos is switching from US eastern time to UT -04 1949 year-round, modeled as a switch on 2014-11-02 at 02:00. 1950 [As noted in 2014j, this switch was later delayed.] 1951 1952 Changes affecting past timestamps 1953 1954 Time in Russia or the USSR before 1926 or so has been corrected by 1955 a few seconds in the following zones: Asia/Irkutsk, 1956 Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi, 1957 Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara. For 1958 Asia/Yekaterinburg the correction is a few minutes. (Thanks to 1959 Vladimir Karpinsky.) 1960 1961 The Portuguese decree of 1911-05-26 took effect on 1912-01-01. 1962 This affects 1911 timestamps in Africa/Bissau, Africa/Luanda, 1963 Atlantic/Azores, and Atlantic/Madeira. Also, Lisbon's pre-1912 1964 GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32. 1965 (Thanks to Stephen Colebourne for pointing to the decree.) 1966 1967 Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59. 1968 1969 A new file 'backzone' contains data which may appeal to 1970 connoisseurs of old timestamps, although it is out of scope for 1971 the tz database, is often poorly sourced, and contains some data 1972 that is known to be incorrect. The new file is not recommended 1973 for ordinary use and its entries are not installed by default. 1974 (Thanks to Lester Caine for the high-quality Jersey, Guernsey, and 1975 Isle of Man entries.) 1976 1977 Some more zones have been turned into links, when they differed 1978 from existing zones only for older timestamps. As usual, 1979 these changes affect UT offsets in pre-1970 timestamps only. 1980 Their old contents have been moved to the 'backzone' file. 1981 The affected zones are: Africa/Bangui, Africa/Brazzaville, 1982 Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda, 1983 Africa/Malabo, Africa/Niamey, and Africa/Porto-Novo. 1984 1985 Changes affecting code 1986 1987 Unless NETBSD_INSPIRED is defined to 0, the tz library now 1988 supplies functions for creating and using objects that represent 1989 timezones. The new functions are tzalloc, tzfree, localtime_rz, 1990 mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and 1991 time2posix_z. They are intended for performance: for example, 1992 localtime_rz (unlike localtime_r) is trivially thread-safe without 1993 locking. (Thanks to Christos Zoulas for proposing NetBSD-inspired 1994 functions, and to Alan Barrett and Jonathan Lennox for helping to 1995 debug the change.) 1996 1997 zdump now builds with the tz library unless USE_LTZ is defined to 0, 1998 This lets zdump use tz features even if the system library lacks them. 1999 To build zdump with the system library, use 'make CFLAGS=-DUSE_LTZ=0 2000 TZDOBJS=zdump.o CHECK_TIME_T_ALTERNATIVES='. 2001 2002 zdump now uses localtime_rz if available, as it's significantly faster, 2003 and it can help zdump better diagnose invalid timezone names. 2004 Define HAVE_LOCALTIME_RZ to 0 to suppress this. HAVE_LOCALTIME_RZ 2005 defaults to 1 if NETBSD_INSPIRED && USE_LTZ. When localtime_rz is 2006 not available, zdump now uses localtime_r and tzset if available, 2007 as this is a bit cleaner and faster than plain localtime. Compile 2008 with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system 2009 lacks these two functions. 2010 2011 If THREAD_SAFE is defined to 1, the tz library is now thread-safe. 2012 Although not needed for tz's own applications, which are single-threaded, 2013 this supports POSIX better if the tz library is used in multithreaded apps. 2014 2015 Some crashes have been fixed when zdump or the tz library is given 2016 invalid or outlandish input. 2017 2018 The tz library no longer mishandles leap seconds on platforms with 2019 unsigned time_t in timezones that lack ordinary transitions after 1970. 2020 2021 The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not 2022 already defined, to make it easier to configure on common platforms. 2023 Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this. 2024 2025 Unless the new macro UNINIT_TRAP is defined to 1, the tz code now 2026 assumes that reading uninitialized memory yields garbage values 2027 but does not cause other problems such as traps. 2028 2029 If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now 2030 more likely to guess right for ambiguous timestamps near 2031 transitions where tm_isdst does not change. 2032 2033 If HAVE_STRFTIME_L is defined to 1, the tz library now defines 2034 strftime_l for compatibility with recent versions of POSIX. 2035 Only the C locale is supported, though. HAVE_STRFTIME_L defaults 2036 to 1 on recent POSIX versions, and to 0 otherwise. 2037 2038 tzselect -c now uses a hybrid distance measure that works better 2039 in Africa. (Thanks to Alan Barrett for noting the problem.) 2040 2041 The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used, 2042 or when time_tz is defined. 2043 2044 When HAVE_UTMPX_H is set the 'date' command now builds on systems 2045 whose <utmpx.h> file does not define WTMPX_FILE, and when setting 2046 the date it updates the wtmpx file if _PATH_WTMPX is defined. 2047 This affects GNU/Linux and similar systems. 2048 2049 For easier maintenance later, some C code has been simplified, 2050 some lint has been removed, and the code has been tweaked so that 2051 plain 'make' is more likely to work. 2052 2053 The C type 'bool' is now used for boolean values, instead of 'int'. 2054 2055 The long-obsolete LOCALE_HOME code has been removed. 2056 2057 The long-obsolete 'gtime' function has been removed. 2058 2059 Changes affecting build procedure 2060 2061 'zdump' no longer links in ialloc.o, as it's not needed. 2062 2063 'make check_time_t_alternatives' no longer assumes GNU diff. 2064 2065 Changes affecting distribution tarballs 2066 2067 The files checktab.awk and zoneinfo2tdf.pl are now distributed in 2068 the tzdata tarball instead of the tzcode tarball, since they help 2069 maintain the data. The NEWS and Theory files are now also 2070 distributed in the tzdata tarball, as they're relevant for data. 2071 (Thanks to Alan Barrett for pointing this out.) Also, the 2072 leapseconds.awk file is no longer distributed in the tzcode 2073 tarball, since it belongs in the tzdata tarball (where 2014f 2074 inadvertently also distributed it). 2075 2076 Changes affecting documentation and commentary 2077 2078 A new file CONTRIBUTING is distributed. (Thanks to Tim Parenti for 2079 suggesting a CONTRIBUTING file, and to Tony Finch and Walter Harms 2080 for debugging it.) 2081 2082 The man pages have been updated to use function prototypes, 2083 to document thread-safe variants like localtime_r, and to document 2084 the NetBSD-inspired functions tzalloc, tzfree, localtime_rz, and 2085 mktime_z. 2086 2087 The fields in Link lines have been renamed to be more descriptive 2088 and more like the parameters of 'ln'. LINK-FROM has become TARGET, 2089 and LINK-TO has become LINK-NAME. 2090 2091 tz-link.htm mentions the IETF's tzdist working group; Windows 2092 Runtime etc. (thanks to Matt Johnson); and HP-UX's tztab. 2093 2094 Some broken URLs have been fixed in the commentary. (Thanks to 2095 Lester Caine.) 2096 2097 Commentary about Philippines DST has been updated, and commentary 2098 on pre-1970 time in India has been added. 2099 2100 2101 Release 2014f - 2014-08-05 17:42:36 -0700 2102 2103 Changes affecting future timestamps 2104 2105 Russia will subtract an hour from most of its time zones on 2014-10-26 2106 at 02:00 local time. (Thanks to Alexander Krivenyshev.) 2107 There are a few exceptions: Magadan Oblast (Asia/Magadan) and Zabaykalsky 2108 Krai are subtracting two hours; conversely, Chukotka Autonomous Okrug 2109 (Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka), Kemerovo Oblast 2110 (Asia/Novokuznetsk), and the Samara Oblast and the Udmurt Republic 2111 (Europe/Samara) are not changing their clocks. The changed zones are 2112 Europe/Kaliningrad, Europe/Moscow, Europe/Simferopol, Europe/Volgograd, 2113 Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk, 2114 Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Khandyga, 2115 Asia/Sakhalin, and Asia/Ust-Nera; Asia/Magadan will have two hours 2116 subtracted; and Asia/Novokuznetsk's time zone abbreviation is affected, 2117 but not its UTC offset. Two zones are added: Asia/Chita (split 2118 from Asia/Yakutsk, and also with two hours subtracted) and 2119 Asia/Srednekolymsk (split from Asia/Magadan, but with only one hour 2120 subtracted). (Thanks to Tim Parenti for much of the above.) 2121 2122 Changes affecting time zone abbreviations 2123 2124 Australian eastern time zone abbreviations are now AEST/AEDT not EST, 2125 and similarly for the other Australian zones. That is, for eastern 2126 standard and daylight saving time the abbreviations are AEST and AEDT 2127 instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT, 2128 and AWST/AWDT are now used instead of the former CST, CWST, and WST. 2129 This change does not affect UT offsets, only time zone abbreviations. 2130 (Thanks to Rich Tibbett and many others.) 2131 2132 Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07) 2133 effective 2014-10-26 at 02:00 local time. 2134 2135 The time zone abbreviation for Xinjiang Time (observed in rmqi) 2136 has been changed from URUT to XJT. (Thanks to Luther Ma.) 2137 2138 Prefer MSK/MSD for Moscow time in Russia, even in other cities. 2139 Similarly, prefer EET/EEST for eastern European time in Russia. 2140 2141 Change time zone abbreviations in (western) Samoa to use "ST" and 2142 "DT" suffixes, as this is more likely to match common practice. 2143 Prefix "W" to (western) Samoa time when its standard-time offset 2144 disagrees with that of American Samoa. 2145 2146 America/Metlakatla now uses PST, not MeST, to abbreviate its time zone. 2147 2148 Time zone abbreviations have been updated for Japan's two time 2149 zones used 1896-1937. JWST now stands for Western Standard 2150 Time, and JCST for Central Standard Time (formerly this was CJT). 2151 These abbreviations are now used for time in Korea, Taiwan, 2152 and Sakhalin while controlled by Japan. 2153 2154 Changes affecting past timestamps 2155 2156 China's five zones have been simplified to two, since the post-1970 2157 differences in the other three seem to have been imaginary. The 2158 zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been 2159 removed; backwards-compatibility links still work, albeit with 2160 different behaviors for timestamps before May 1980. Asia/Urumqi's 2161 1980 transition to UT +08 has been removed, so that it is now at 2162 +06 and not +08. (Thanks to Luther Ma and to Alois Treindl; 2163 Treindl sent helpful translations of two papers by Guo Qingsheng.) 2164 2165 Some zones have been turned into links, when they differed from existing 2166 zones only for older UT offsets where data entries were likely invented. 2167 These changes affect UT offsets in pre-1970 timestamps only. This is 2168 similar to the change in release 2013e, except this time for western 2169 Africa. The affected zones are: Africa/Bamako, Africa/Banjul, 2170 Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome, 2171 Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, and 2172 Atlantic/St_Helena. This also affects the backwards-compatibility 2173 link Africa/Timbuktu. (Thanks to Alan Barrett, Stephen Colebourne, 2174 Tim Parenti, and David Patte for reporting problems in earlier 2175 versions of this change.) 2176 2177 Asia/Shanghai's pre-standard-time UT offset has been changed from 2178 8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its 2179 transition to standard time has been changed from 1928 to 1901. 2180 2181 Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01, 2182 then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945. 2183 In 1946 it observed DST from 05-15 through 09-30; in 1947 2184 from 04-15 through 10-31; and in 1979 from 07-01 through 09-30. 2185 (Thanks to Yu-Cheng Chuang.) 2186 2187 Asia/Riyadh's transition to standard time is now 1947-03-14, not 1950. 2188 2189 Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not 2190 10-03 at 00:00. (Thanks to Konstantin Hyppnen.) 2191 2192 Pacific/Pago_Pago has been changed from UT -11:30 to -11 for the 2193 period from 1911 to 1950. 2194 2195 Pacific/Chatham has been changed to New Zealand standard time plus 2196 45 minutes for the period before 1957, reflecting a 1956 remark in 2197 the New Zealand parliament. 2198 2199 Europe/Budapest has several pre-1946 corrections: in 1918 the transition 2200 out of DST was on 09-16, not 09-29; in 1919 it was on 11-24, not 09-15; in 2201 1945 it was on 11-01, not 11-03; in 1941 the transition to DST was 04-08 2202 not 04-06 at 02:00; and there was no DST in 1920. 2203 2204 Africa/Accra is now assumed to have observed DST from 1920 through 1935. 2205 2206 Time in Russia before 1927 or so has been corrected by a few seconds in 2207 the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi, 2208 Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg, Europe/Helsinki, and 2209 Europe/Riga. Also, Moscow's location has been changed to its Kilometer 0 2210 point. (Thanks to Vladimir Karpinsky for the Moscow changes.) 2211 2212 Changes affecting data format 2213 2214 A new file 'zone1970.tab' supersedes 'zone.tab' in the installed data. 2215 The new file's extended format allows multiple country codes per zone. 2216 The older file is still installed but is deprecated; its format is 2217 not changing and it will still be distributed for a while, but new 2218 applications should use the new file. 2219 2220 The new file format simplifies maintenance of obscure locations. 2221 To test this, it adds coverage for the Crozet Islands and the 2222 Scattered Islands. (Thanks to Tobias Conradi and Antoine Leca.) 2223 2224 The file 'iso3166.tab' is planned to switch from ASCII to UTF-8. 2225 It is still ASCII now, but commentary about the switch has been added. 2226 The new file 'zone1970.tab' already uses UTF-8. 2227 2228 Changes affecting code 2229 2230 'localtime', 'mktime', etc. now use much less stack space if ALL_STATE 2231 is defined. (Thanks to Elliott Hughes for reporting the problem.) 2232 2233 'zic' no longer mishandles input when ignoring case in locales that 2234 are not compatible with English, e.g., unibyte Turkish locales when 2235 compiled with HAVE_GETTEXT. 2236 2237 Error diagnostics of 'zic' and 'yearistype' have been reworded so that 2238 they no longer use ASCII '-' as if it were a dash. 2239 2240 'zic' now rejects output file names that contain '.' or '..' components. 2241 (Thanks to Tim Parenti for reporting the problem.) 2242 2243 'zic -v' now warns about output file names that do not follow 2244 POSIX rules, or that contain a digit or '.'. (Thanks to Arthur 2245 David Olson for starting the ball rolling on this.) 2246 2247 Some lint has been removed when using GCC_DEBUG_FLAGS with GCC 4.9.0. 2248 2249 Changes affecting build procedure 2250 2251 'zic' no longer links in localtime.o and asctime.o, as they're not needed. 2252 (Thanks to John Cochran.) 2253 2254 Changes affecting documentation and commentary 2255 2256 The 'Theory' file documents legacy names, the longstanding 2257 exceptions to the POSIX-inspired file name rules. 2258 2259 The 'zic' documentation clarifies the role of time types when 2260 interpreting dates. (Thanks to Arthur David Olson.) 2261 2262 Documentation and commentary now prefer UTF-8 to US-ASCII, 2263 allowing the use of proper accents in foreign words and names. 2264 Code and data have not changed because of this. (Thanks to 2265 Garrett Wollman, Ian Abbott, and Guy Harris for helping to debug 2266 this.) 2267 2268 Non-HTML documentation and commentary now use plain-text URLs instead of 2269 HTML insertions, and are more consistent about bracketing URLs when they 2270 are not already surrounded by white space. (Thanks to suggestions by 2271 Steffen Nurpmeso.) 2272 2273 There is new commentary about Xujiahui Observatory, the five time-zone 2274 project in China from 1918 to 1949, timekeeping in Japanese-occupied 2275 Shanghai, and Tibet Time in the 1950s. The sharp-eyed can spot the 2276 warlord Jin Shuren in the data. 2277 2278 Commentary about the coverage of each Russian zone has been standardized. 2279 (Thanks to Tim Parenti). 2280 2281 There is new commentary about contemporary timekeeping in Ethiopia. 2282 2283 Obsolete comments about a 2007 proposal for DST in Kuwait has been removed. 2284 2285 There is new commentary about time in Poland in 1919. 2286 2287 Proper credit has been given to DST inventor George Vernon Hudson. 2288 2289 Commentary about time in Metlakatla, AK and Resolute, NU has been 2290 improved, with a new source for the former. 2291 2292 In zone.tab, Pacific/Easter no longer mentions Salas y Gmez, as it 2293 is uninhabited. 2294 2295 Commentary about permanent Antarctic bases has been updated. 2296 2297 Several typos have been corrected. (Thanks to Tim Parenti for 2298 contributing some of these fixes.) 2299 2300 tz-link.htm now mentions the JavaScript libraries Moment Timezone, 2301 TimezoneJS.Date, Walltime-js, and Timezone. (Thanks to a heads-up 2302 from Matt Johnson.) Also, it mentions the Go 'latlong' package. 2303 (Thanks to a heads-up from Dirkjan Ochtman.) 2304 2305 The files usno1988, usno1989, usno1989a, usno1995, usno1997, and usno1998 2306 have been removed. These obsolescent US Naval Observatory entries were no 2307 longer helpful for maintenance. (Thanks to Tim Parenti for the suggestion.) 2308 2309 2310 Release 2014e - 2014-06-12 21:53:52 -0700 2311 2312 Changes affecting near-future timestamps 2313 2314 Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00. 2315 (Thanks to Imed Chihi.) Guess that from 2015 on Egypt will temporarily 2316 switch to standard time at 24:00 the last Thursday before Ramadan, and 2317 back to DST at 00:00 the first Friday after Ramadan. 2318 2319 Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00. (Thanks 2320 to Milamber Space Network.) Guess that from 2015 on Morocco will 2321 temporarily switch to standard time at 03:00 the last Saturday before 2322 Ramadan, and back to DST at 02:00 the first Saturday after Ramadan. 2323 2324 Changes affecting past timestamps 2325 2326 The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of 2327 "MSD" for Moscow's double daylight time in summer 1921. Also, a typo 2328 "VLASST" has been repaired to be "VLAST" for Vladivostok summer time 2329 in 1991. (Thanks to Hank W. for reporting the problems.) 2330 2331 Changes affecting commentary 2332 2333 tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the 2334 draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and 2335 removes stale pointers to World Time Explorer and WORLDTIME. 2336 2337 2338 Release 2014d - 2014-05-27 21:34:40 -0700 2339 2340 Changes affecting code 2341 2342 zic no longer generates files containing timestamps before the Big Bang. 2343 This works around GNOME glib bug 878 2344 <https://gitlab.gnome.org/GNOME/glib/issues/878> 2345 (Thanks to Leonardo Chiquitto for reporting the bug, and to 2346 Arthur David Olson and James Cloos for suggesting improvements to the fix.) 2347 2348 Changes affecting documentation 2349 2350 tz-link.htm now mentions GNOME. 2351 2352 2353 Release 2014c - 2014-05-13 07:44:13 -0700 2354 2355 Changes affecting near-future timestamps 2356 2357 Egypt observes DST starting 2014-05-15 at 24:00. 2358 (Thanks to Ahmad El-Dardiry and Gunther Vermier.) 2359 Details have not been announced, except that DST will not be observed 2360 during Ramadan. Guess that DST will stop during the same Ramadan dates as 2361 Morocco, and that Egypt's future spring and fall transitions will be the 2362 same as 2010 when it last observed DST, namely April's last Friday at 2363 00:00 to September's last Thursday at 23:00 standard time. Also, guess 2364 that Ramadan transitions will be at 00:00 standard time. 2365 2366 Changes affecting code 2367 2368 zic now generates transitions for minimum time values, eliminating guesswork 2369 when handling low-valued timestamps. (Thanks to Arthur David Olson.) 2370 2371 Port to Cygwin sans glibc. (Thanks to Arthur David Olson.) 2372 2373 Changes affecting commentary and documentation 2374 2375 Remove now-confusing comment about Jordan. (Thanks to Oleksii Nochovnyi.) 2376 2377 2378 Release 2014b - 2014-03-24 21:28:50 -0700 2379 2380 Changes affecting near-future timestamps 2381 2382 Crimea switches to Moscow time on 2014-03-30 at 02:00 local time. 2383 (Thanks to Alexander Krivenyshev.) Move its zone.tab entry from UA to RU. 2384 2385 New entry for Troll station, Antarctica. (Thanks to Paul-Inge Flakstad and 2386 Bengt-Inge Larsson.) This is currently an approximation; a better version 2387 will require the zic and localtime fixes mentioned below, and the plan is 2388 to wait for a while until at least the zic fixes propagate. 2389 2390 Changes affecting code 2391 2392 'zic' and 'localtime' no longer reject locations needing four transitions 2393 per year for the foreseeable future. (Thanks to Andrew Main (Zefram).) 2394 Also, 'zic' avoids some unlikely failures due to integer overflow. 2395 2396 Changes affecting build procedure 2397 2398 'make check' now detects Rule lines defined but never used. 2399 The NZAQ rules, an instance of this problem, have been removed. 2400 2401 Changes affecting commentary and documentation 2402 2403 Fix Tuesday/Thursday typo in description of time in Israel. 2404 (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.) 2405 2406 Microsoft Windows 8.1 doesn't support tz database names. (Thanks 2407 to Donald MacQueen.) Instead, the Microsoft Windows Store app 2408 library supports them. 2409 2410 Add comments about Johnston Island time in the 1960s. 2411 (Thanks to Lyle McElhaney.) 2412 2413 Morocco's 2014 DST start will be as predicted. 2414 (Thanks to Sebastien Willemijns.) 2415 2416 2417 Release 2014a - 2014-03-07 23:30:29 -0800 2418 2419 Changes affecting near-future timestamps 2420 2421 Turkey begins DST on 2014-03-31, not 03-30. (Thanks to Faruk Pasin for 2422 the heads-up, and to Tim Parenti for simplifying the update.) 2423 2424 Changes affecting past timestamps 2425 2426 Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00. 2427 (Thanks to Steffen Thorsen.) 2428 2429 Ukraine switched from Moscow to Eastern European time on 1990-07-01 2430 (not 1992-01-01), and observed DST during the entire next winter. 2431 (Thanks to Vladimir in Moscow via Alois Treindl.) 2432 2433 In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03. 2434 (Thanks to Avigdor Finkelstein.) 2435 2436 Changes affecting code 2437 2438 A uninitialized-storage bug in 'localtime' has been fixed. 2439 (Thanks to Logan Chien.) 2440 2441 Changes affecting the build procedure 2442 2443 The settings for 'make check_web' now default to Ubuntu 13.10. 2444 2445 Changes affecting commentary and documentation 2446 2447 The boundary of the US Pacific time zone is given more accurately. 2448 (Thanks to Alan Mintz.) 2449 2450 Chile's 2014 DST will be as predicted. (Thanks to Jos Miguel Garrido.) 2451 2452 Paraguay's 2014 DST will be as predicted. (Thanks to Carlos Ral Perasso.) 2453 2454 Better descriptions of countries with same time zone history as 2455 Trinidad and Tobago since 1970. (Thanks to Alan Barrett for suggestion.) 2456 2457 Several changes affect tz-link.htm, the main web page. 2458 2459 Mention Time.is (thanks to Even Scharning) and WX-now (thanks to 2460 David Braverman). 2461 2462 Mention xCal (Internet RFC 6321) and jCal. 2463 2464 Microsoft has some support for tz database names. 2465 2466 CLDR data formats include both XML and JSON. 2467 2468 Mention Maggiolo's map of solar vs standard time. 2469 (Thanks to Arthur David Olson.) 2470 2471 Mention TZ4Net. (Thanks to Matt Johnson.) 2472 2473 Mention the timezone-olson Haskell package. 2474 2475 Mention zeitverschiebung.net. (Thanks to Martin Jger.) 2476 2477 Remove moribund links to daylight-savings-time.info and to 2478 Simple Timer + Clocks. 2479 2480 Update two links. (Thanks to Oscar van Vlijmen.) 2481 2482 Fix some formatting glitches, e.g., remove random newlines from 2483 abbr elements' title attributes. 2484 2485 2486 Release 2013i - 2013-12-17 07:25:23 -0800 2487 2488 Changes affecting near-future timestamps: 2489 2490 Jordan switches back to standard time at 00:00 on December 20, 2013. 2491 The 2006-2011 transition schedule is planned to resume in 2014. 2492 (Thanks to Steffen Thorsen.) 2493 2494 Changes affecting past timestamps: 2495 2496 In 2004, Cuba began DST on March 28, not April 4. 2497 (Thanks to Steffen Thorsen.) 2498 2499 Changes affecting code 2500 2501 The compile-time flag NOSOLAR has been removed, as nowadays the 2502 benefit of slightly shrinking runtime table size is outweighed by the 2503 cost of disallowing potential future updates that exceed old limits. 2504 2505 Changes affecting documentation and commentary 2506 2507 The files solar87, solar88, and solar89 are no longer distributed. 2508 They were a negative experiment - that is, a demonstration that 2509 tz data can represent solar time only with some difficulty and error. 2510 Their presence in the distribution caused confusion, as Riyadh 2511 civil time was generally not solar time in those years. 2512 2513 tz-link.htm now mentions Noda Time. (Thanks to Matt Johnson.) 2514 2515 2516 Release 2013h - 2013-10-25 15:32:32 -0700 2517 2518 Changes affecting current and future timestamps: 2519 2520 Libya has switched its UT offset back to +02 without DST, instead 2521 of +01 with DST. (Thanks to Even Scharning.) 2522 2523 Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules. 2524 (Thanks to Gwillim Law.) 2525 2526 Changes affecting future timestamps: 2527 2528 Acre and (we guess) western Amazonas will switch from UT -04 to -05 2529 on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe. 2530 (Thanks to Steffen Thorsen.) 2531 2532 Add entries for DST transitions in Morocco in the year 2038. 2533 This avoids some year-2038 glitches introduced in 2013g. 2534 (Thanks to Yoshito Umaoka for reporting the problem.) 2535 2536 Changes affecting API 2537 2538 The 'tzselect' command no longer requires the 'select' command, 2539 and should now work with /bin/sh on more platforms. It also works 2540 around a bug in BusyBox awk before version 1.21.0. (Thanks to 2541 Patrick 'P. J.' McDermott and Alan Barrett.) 2542 2543 Changes affecting code 2544 2545 Fix localtime overflow bugs with 32-bit unsigned time_t. 2546 2547 zdump no longer assumes sscanf returns maximal values on overflow. 2548 2549 Changes affecting the build procedure 2550 2551 The builder can specify which programs to use, if any, instead of 2552 'ar' and 'ranlib', and libtz.a is now built locally before being 2553 installed. (Thanks to Michael Forney.) 2554 2555 A dependency typo in the 'zdump' rule has been fixed. 2556 (Thanks to Andrew Paprocki.) 2557 2558 The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f' 2559 work as specified by POSIX.2-1992 or later; this is portable nowadays. 2560 2561 'make clean' no longer removes 'leapseconds', since it's 2562 host-independent and is part of the distribution. 2563 2564 The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed. 2565 2566 Changes affecting documentation and commentary 2567 2568 tz-link.htm now mentions TC TIMEZONE's draft time zone service protocol 2569 (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle). 2570 2571 Update URLs in tz-link page. Add URLs for Microsoft Windows, since 2572 8.1 introduces tz support. Remove URLs for Tru64 and UnixWare (no 2573 longer maintained) and for old advisories. SOFA now does C. 2574 2575 Release 2013g - 2013-09-30 21:08:26 -0700 2576 2577 Changes affecting current and near-future timestamps 2578 2579 Morocco now observes DST from the last Sunday in March to the last 2580 Sunday in October, not April to September respectively. (Thanks 2581 to Steffen Thorsen.) 2582 2583 Changes affecting 'zic' 2584 2585 'zic' now runs on platforms that lack both hard links and symlinks. 2586 (Thanks to Theo Veenker for reporting the problem, for MinGW.) 2587 Also, fix some bugs on platforms that lack hard links but have symlinks. 2588 2589 'zic -v' again warns that Asia/Tehran has no POSIX environment variable 2590 to predict the far future, fixing a bug introduced in 2013e. 2591 2592 Changes affecting the build procedure 2593 2594 The 'leapseconds' file is again put into the tzdata tarball. 2595 Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to 2596 Matt Burgess and Ian Abbott.) The timestamps of these and other 2597 dependent files in tarballs are adjusted more consistently. 2598 2599 Changes affecting documentation and commentary 2600 2601 The README file is now part of the data tarball as well as the code. 2602 It now states that files are public domain unless otherwise specified. 2603 (Thanks to Andrew Main (Zefram) for asking for clarifications.) 2604 Its details about the 1989 release moved to a place of honor near 2605 the end of NEWS. 2606 2607 2608 Release 2013f - 2013-09-24 23:37:36 -0700 2609 2610 Changes affecting near-future timestamps 2611 2612 Tocantins will very likely not observe DST starting this spring. 2613 (Thanks to Steffen Thorsen.) 2614 2615 Jordan will likely stay at UT +03 indefinitely, and will not fall 2616 back this fall. 2617 2618 Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.) 2619 2620 Changes affecting API 2621 2622 The types of the global variables 'timezone' and 'altzone' (if present) 2623 have been changed back to 'long'. This is required for 'timezone' 2624 by POSIX, and for 'altzone' by common practice, e.g., Solaris 11. 2625 These variables were originally 'long' in the tz code, but were 2626 mistakenly changed to 'time_t' in 1987; nobody reported the 2627 incompatibility until now. The difference matters on x32, where 2628 'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.) 2629 2630 Changes affecting the build procedure 2631 2632 Avoid long strings in leapseconds.awk to work around a mawk bug. 2633 (Thanks to Cyril Baurand.) 2634 2635 Changes affecting documentation and commentary 2636 2637 New file 'NEWS' that contains release notes like this one. 2638 2639 Paraguay's law does not specify DST transition time; 00:00 is customary. 2640 (Thanks to Waldemar Villamayor-Venialbo.) 2641 2642 Minor capitalization fixes. 2643 2644 Changes affecting version-control only 2645 2646 The experimental GitHub repository now contains annotated and 2647 signed tags for recent releases, e.g., '2013e' for Release 2013e. 2648 Releases are tagged starting with 2012e; earlier releases were 2649 done differently, and tags would either not have a simple name or 2650 not exactly match what was released. 2651 2652 'make set-timestamps' is now simpler and a bit more portable. 2653 2654 2655 Release 2013e - 2013-09-19 23:50:04 -0700 2656 2657 Changes affecting near-future timestamps 2658 2659 This year Fiji will start DST on October 27, not October 20. 2660 (Thanks to David Wheeler for the heads-up.) For now, guess that 2661 Fiji will continue to spring forward the Sunday before the fourth 2662 Monday in October. 2663 2664 Changes affecting current and future time zone abbreviations 2665 2666 Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian 2667 time zone abbreviations since 1932. (Thanks to George Ziegler, 2668 Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and 2669 Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura, 2670 Asia/Makassar, and Asia/Pontianak. 2671 2672 Use ART (UT -03, standard time), rather than WARST (also -03, but 2673 daylight saving time) for San Luis, Argentina since 2009. 2674 2675 Changes affecting Godthb timestamps after 2037 if version mismatch 2676 2677 Allow POSIX-like TZ strings where the transition time's hour can 2678 range from -167 through 167, instead of the POSIX-required 0 2679 through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the 2680 new Fiji rules. This is a more-compact way to represent 2681 far-future timestamps for America/Godthab, America/Santiago, 2682 Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem, 2683 Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by 2684 this change. (Derived from a suggestion by Arthur David Olson.) 2685 2686 Allow POSIX-like TZ strings where daylight saving time is in 2687 effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western 2688 Argentina Summer Time all year. This supports a more-compact way 2689 to represent the 2013d data for America/Argentina/San_Luis. 2690 Because of the change for San Luis noted above this change does not 2691 affect the current data. (Thanks to Andrew Main (Zefram) for 2692 suggestions that improved this change.) 2693 2694 Where these two TZ changes take effect, there is a minor extension 2695 to the tz file format in that it allows new values for the 2696 embedded TZ-format string, and the tz file format version number 2697 has therefore been increased from 2 to 3 as a precaution. 2698 Version-2-based client code should continue to work as before for 2699 all timestamps before 2038. Existing version-2-based client code 2700 (tzcode, GNU/Linux, Solaris) has been tested on version-3-format 2701 files, and typically works in practice even for timestamps after 2702 2037; the only known exception is America/Godthab. 2703 2704 Changes affecting timestamps before 1970 2705 2706 Pacific/Johnston is now a link to Pacific/Honolulu. This corrects 2707 some errors before 1947. 2708 2709 Some zones have been turned into links, when they differ from existing 2710 zones only in older data entries that were likely invented or that 2711 differ only in LMT or transitions from LMT. These changes affect 2712 only timestamps before 1943. The affected zones are: 2713 Africa/Juba, America/Anguilla, America/Aruba, America/Dominica, 2714 America/Grenada, America/Guadeloupe, America/Marigot, 2715 America/Montserrat, America/St_Barthelemy, America/St_Kitts, 2716 America/St_Lucia, America/St_Thomas, America/St_Vincent, 2717 America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for 2718 confirming that the old Europe/Vaduz zone was wrong and the new 2719 link is better for WWII-era times.) 2720 2721 Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects 2722 America/Cayman, America/Jamaica and America/Grand_Turk timestamps 2723 from 1890 to 1912. 2724 2725 Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46. 2726 This affects Europe/Zurich timestamps from 1853 to 1894. (Thanks 2727 to Alois Treindl). 2728 2729 Change the date of the circa-1850 Zurich transition from 1849-09-12 2730 to 1853-07-16, overriding Shanks with data from Messerli about 2731 postal and telegraph time in Switzerland. 2732 2733 Changes affecting time zone abbreviations before 1970 2734 2735 For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932, 2736 as Jakarta was called Batavia back then. 2737 2738 Changes affecting API 2739 2740 The 'zic' command now outputs a dummy transition when far-future 2741 data can't be summarized using a TZ string, and uses a 402-year 2742 window rather than a 400-year window. For the current data, this 2743 affects only the Asia/Tehran file. It does not affect any of the 2744 timestamps that this file represents, so zdump outputs the same 2745 information as before. (Thanks to Andrew Main (Zefram).) 2746 2747 The 'date' command has a new '-r' option, which lets you specify 2748 the integer time to display, a la FreeBSD. 2749 2750 The 'tzselect' command has two new options '-c' and '-n', which lets you 2751 select a zone based on latitude and longitude. 2752 2753 The 'zic' command's '-v' option now warns about constructs that 2754 require the new version-3 binary file format. (Thanks to Arthur 2755 David Olson for the suggestion.) 2756 2757 Support for floating-point time_t has been removed. 2758 It was always dicey, and POSIX no longer requires it. 2759 (Thanks to Eric Blake for suggesting to the POSIX committee to 2760 remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy 2761 Heninger, Arthur David Olson, and Alois Treindl, for reporting 2762 bugs and elucidating some of the corners of the old floating-point 2763 implementation.) 2764 2765 The signatures of 'offtime', 'timeoff', and 'gtime' have been 2766 changed back to the old practice of using 'long' to represent UT 2767 offsets. This had been inadvertently and mistakenly changed to 2768 'int_fast32_t'. (Thanks to Christos Zoulas.) 2769 2770 The code avoids undefined behavior on integer overflow in some 2771 more places, including gmtime, localtime, mktime and zdump. 2772 2773 Changes affecting the zdump utility 2774 2775 zdump now outputs "UT" when referring to Universal Time, not "UTC". 2776 "UTC" does not make sense for timestamps that predate the introduction 2777 of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen 2778 for clarifying UT vs UTC.) 2779 2780 Data changes affecting behavior of tzselect and similar programs 2781 2782 Country code BQ is now called the more-common name "Caribbean Netherlands" 2783 rather than the more-official "Bonaire, St Eustatius & Saba". 2784 2785 Remove from zone.tab the names America/Montreal, America/Shiprock, 2786 and Antarctica/South_Pole, as they are equivalent to existing 2787 same-country-code zones for post-1970 timestamps. The data entries for 2788 these names are unchanged, so the names continue to work as before. 2789 2790 Changes affecting code internals 2791 2792 zic -c now runs way faster on 64-bit hosts when given large numbers. 2793 2794 zic now uses vfprintf to avoid allocating and freeing some memory. 2795 2796 tzselect now computes the list of continents from the data, 2797 rather than have it hard-coded. 2798 2799 Minor changes pacify GCC 4.7.3 and GCC 4.8.1. 2800 2801 Changes affecting the build procedure 2802 2803 The 'leapseconds' file is now generated automatically from a 2804 new file 'leap-seconds.list', which is a copy of 2805 <ftp://ftp.nist.gov/pub/time/leap-seconds.list> 2806 A new source file 'leapseconds.awk' implements this. 2807 The goal is simplification of the future maintenance of 'leapseconds'. 2808 2809 When building the 'posix' or 'right' subdirectories, if the 2810 subdirectory would be a copy of the default subdirectory, it is 2811 now made a symbolic link if that is supported. This saves about 2812 2 MB of file system space. 2813 2814 The links America/Shiprock and Antarctica/South_Pole have been 2815 moved to the 'backward' file. This affects only nondefault builds 2816 that omit 'backward'. 2817 2818 Changes affecting version-control only 2819 2820 .gitignore now ignores 'date'. 2821 2822 Changes affecting documentation and commentary 2823 2824 Changes to the 'tzfile' man page 2825 2826 It now mentions that the binary file format may be extended in 2827 future versions by appending data. 2828 2829 It now refers to the 'zdump' and 'zic' man pages. 2830 2831 Changes to the 'zic' man page 2832 2833 It lists conditions that elicit a warning with '-v'. 2834 2835 It says that the behavior is unspecified when duplicate names 2836 are given, or if the source of one link is the target of another. 2837 2838 Its examples are updated to match the latest data. 2839 2840 The definition of white space has been clarified slightly. 2841 (Thanks to Michael Deckers.) 2842 2843 Changes to the 'Theory' file 2844 2845 There is a new section about the accuracy of the tz database, 2846 describing the many ways that errors can creep in, and 2847 explaining why so many of the pre-1970 timestamps are wrong or 2848 misleading (thanks to Steve Allen, Lester Caine, and Garrett 2849 Wollman for discussions that contributed to this). 2850 2851 The 'Theory' file describes LMT better (this follows a 2852 suggestion by Guy Harris). 2853 2854 It refers to the 2013 edition of POSIX rather than the 2004 edition. 2855 2856 It's mentioned that excluding 'backward' should not affect the 2857 other data, and it suggests at least one zone.tab name per 2858 inhabited country (thanks to Stephen Colebourne). 2859 2860 Some longstanding restrictions on names are documented, e.g., 2861 'America/New_York' precludes 'America/New_York/Bronx'. 2862 2863 It gives more reasons for the 1970 cutoff. 2864 2865 It now mentions which time_t variants are supported, such as 2866 signed integer time_t. (Thanks to Paul Goyette for reporting 2867 typos in an experimental version of this change.) 2868 2869 (Thanks to Philip Newton for correcting typos in these changes.) 2870 2871 Documentation and commentary is more careful to distinguish UT in 2872 general from UTC in particular. (Thanks to Steve Allen.) 2873 2874 Add a better source for the Zurich 1894 transition. 2875 (Thanks to Pierre-Yves Berger.) 2876 2877 Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.) 2878 2879 2880 Release 2013d - 2013-07-05 07:38:01 -0700 2881 2882 Changes affecting future timestamps: 2883 2884 Morocco's midsummer transitions this year are July 7 and August 10, 2885 not July 9 and August 8. (Thanks to Andrew Paprocki.) 2886 2887 Israel now falls back on the last Sunday of October. 2888 (Thanks to Ephraim Silverberg.) 2889 2890 Changes affecting past timestamps: 2891 2892 Specify Jerusalem's location more precisely; this changes the pre-1880 2893 times by 2 s. 2894 2895 Changing affecting metadata only: 2896 2897 Fix typos in the entries for country codes BQ and SX. 2898 2899 Changes affecting code: 2900 2901 Rework the code to fix a bug with handling Australia/Macquarie on 2902 32-bit hosts (thanks to Arthur David Olson). 2903 2904 Port to platforms like NetBSD, where time_t can be wider than long. 2905 2906 Add support for testing time_t types other than the system's. 2907 Run 'make check_time_t_alternatives' to try this out. 2908 Currently, the tests fail for unsigned time_t; 2909 this should get fixed at some point. 2910 2911 Changes affecting documentation and commentary: 2912 2913 Deemphasize the significance of national borders. 2914 2915 Update the zdump man page. 2916 2917 Remove obsolete NOID comment (thanks to Denis Excoffier). 2918 2919 Update several URLs and comments in the web pages. 2920 2921 Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler). 2922 2923 Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka). 2924 2925 2926 Release 2013c - 2013-04-19 16:17:40 -0700 2927 2928 Changes affecting current and future timestamps: 2929 2930 Palestine observed DST starting March 29, 2013. (Thanks to 2931 Steffen Thorsen.) From 2013 on, Gaza and Hebron both observe DST, 2932 with the predicted rules being the last Thursday in March at 24:00 2933 to the first Friday on or after September 21 at 01:00. 2934 2935 Assume that the recent change to Paraguay's DST rules is permanent, 2936 by moving the end of DST to the 4th Sunday in March every year. 2937 (Thanks to Carlos Ral Perasso.) 2938 2939 Changes affecting past timestamps: 2940 2941 Fix some historical data for Palestine to agree with that of 2942 timeanddate.com, as follows: 2943 2944 The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not 2945 00:00 Apr 1. 2946 2947 The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not 2948 02:00. 2949 2950 The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27. 2951 2952 The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2. 2953 2954 The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01. 2955 2956 The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00. 2957 2958 Fix times of habitation for Macquarie to agree with the Tasmania 2959 Parks & Wildlife Service history, which indicates that permanent 2960 habitation was 1899-1919 and 1948 on. 2961 2962 Changing affecting metadata only: 2963 2964 Macquarie Island is politically part of Australia, not Antarctica. 2965 (Thanks to Tobias Conradi.) 2966 2967 Sort Macquarie more-consistently with other parts of Australia. 2968 (Thanks to Tim Parenti.) 2969 2970 2971 Release 2013b - 2013-03-10 22:33:40 -0700 2972 2973 Changes affecting current and future timestamps: 2974 2975 Haiti uses US daylight-saving rules this year, and presumably future years. 2976 This changes timestamps starting today. (Thanks to Steffen Thorsen.) 2977 2978 Paraguay will end DST on March 24 this year. 2979 (Thanks to Steffen Thorsen.) For now, assume it's just this year. 2980 2981 Morocco does not observe DST during Ramadan; 2982 try to predict Ramadan in Morocco as best we can. 2983 (Thanks to Erik Homoet for the heads-up.) 2984 2985 Changes affecting commentary: 2986 2987 Update URLs in tz-link page. Add URLs for webOS, BB10, iOS. 2988 Update URL for Solaris. Mention Internet RFC 6557. 2989 Update Internet RFCs 2445->5545, 2822->5322. 2990 Switch from FTP to HTTP for Internet RFCs. 2991 2992 2993 Release 2013a - 2013-02-27 09:20:35 -0800 2994 2995 Change affecting binary data format: 2996 2997 The zone offset at the end of version-2-format zone files is now 2998 allowed to be 24:00, as per POSIX.1-2008. (Thanks to Arthur David Olson.) 2999 3000 Changes affecting current and future timestamps: 3001 3002 Chile's 2013 rules, and we guess rules for 2014 and later, will be 3003 the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC. 3004 (Thanks to Steffen Thorsen and Robert Elz.) 3005 3006 New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen. 3007 (Thanks to Tobias Conradi and Arthur David Olson.) 3008 3009 Many changes affect historical timestamps before 1940. 3010 These were deduced from: Milne J. Civil time. Geogr J. 1899 3011 Feb;13(2):173-94 <https://www.jstor.org/stable/1774359>. 3012 3013 Changes affecting the code: 3014 3015 Fix zic bug that mishandled Egypt's 2010 changes (this also affected 3016 the data). (Thanks to Arthur David Olson.) 3017 3018 Fix localtime bug when time_t is unsigned and data files were generated 3019 by a signed time_t system. (Thanks to Doug Bailey for reporting and 3020 to Arthur David Olson for fixing.) 3021 3022 Allow the email address for bug reports to be set by the packager. 3023 The default is tz (a] iana.org, as before. (Thanks to Joseph S. Myers.) 3024 3025 Update HTML checking to be compatible with Ubuntu 12.10. 3026 3027 Check that files are a safe subset of ASCII. At some point we may 3028 relax this requirement to a safe subset of UTF-8. Without the 3029 check, some non-UTF-8 encodings were leaking into the distribution. 3030 3031 Commentary changes: 3032 3033 Restore a comment about copyright notices that was inadvertently deleted. 3034 (Thanks to Arthur David Olson.) 3035 3036 Improve the commentary about which districts observe what times 3037 in Russia. (Thanks to Oscar van Vlijmen and Arthur David Olson). 3038 3039 Add web page links to tz.js. 3040 3041 Add "Run by the Monkeys" to tz-art. (Thanks to Arthur David Olson.) 3042 3043 3044 Release 2012j - 2012-11-12 18:34:49 -0800 3045 3046 Libya moved to CET this weekend, but with DST planned next year. 3047 (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.) 3048 3049 Signatures now have the extension .asc, not .sign, as that's more 3050 standard. (Thanks to Phil Pennock.) 3051 3052 The output of 'zdump --version', and of 'zic --version', now 3053 uses a format that is more typical for --version. 3054 (Thanks to Joseph S. Myers.) 3055 3056 The output of 'tzselect --help', 'zdump --help', and 'zic --help' 3057 now uses tz (a] iana.org rather than the old elsie address. 3058 3059 zic -v now complains about abbreviations that are less than 3 3060 or more than 6 characters, as per Posix. Formerly, it checked 3061 for abbreviations that were more than 3. 3062 3063 'make public' no longer puts its temporary directory under /tmp, 3064 and uses the just-built zic rather than the system zic. 3065 3066 Various fixes to documentation and commentary. 3067 3068 3069 Release 2012i - 2012-11-03 12:57:09 -0700 3070 3071 Cuba switches from DST tomorrow at 01:00. (Thanks to Steffen Thorsen.) 3072 3073 Linker flags can now be specified via LDFLAGS. 3074 AWK now defaults to 'awk', not 'nawk'. 3075 The shell in tzselect now defaults to /bin/bash, but this can 3076 be overridden by specifying KSHELL. 3077 The main web page now mentions the unofficial GitHub repository. 3078 (Thanks to Mike Frysinger.) 3079 3080 Tarball signatures can now be built by running 'make signatures'. 3081 There are also new makefile rules 'tarballs', 'check_public', and 3082 separate makefile rules for each tarball and signature file. 3083 A few makefile rules are now more portable to strict POSIX. 3084 3085 The main web page now lists the canonical IANA URL. 3086 3087 3088 Release 2012h - 2012-10-26 22:49:10 -0700 3089 3090 Bahia no longer has DST. (Thanks to Kelley Cook.) 3091 3092 Tocantins has DST. (Thanks to Rodrigo Severo.) 3093 3094 Israel has new DST rules next year. (Thanks to Ephraim Silverberg.) 3095 3096 Jordan stays on DST this winter. (Thanks to Steffen Thorsen.) 3097 3098 Web page updates. 3099 3100 More C modernization, except that at Arthur David Olson's suggestion 3101 the instances of 'register' were kept. 3102 3103 3104 Release 2012g - 2012-10-17 20:59:45 -0700 3105 3106 Samoa fall 2012 and later. (Thanks to Nicholas Pereira and Robert Elz.) 3107 3108 Palestine fall 2012. (Thanks to Steffen Thorsen.) 3109 3110 Assume C89. 3111 3112 To attack the version-number problem, this release ships the file 3113 'Makefile' (which contains the release number) in both the tzcode and 3114 the tzdata tarballs. The two Makefiles are identical, and should be 3115 identical in any matching pair of tarballs, so it shouldn't matter 3116 which order you extract the tarballs. Perhaps we can come up with a 3117 better version-number scheme at some point; this scheme does have the 3118 virtue of not adding more files. 3119 3120 3121 Release 2012f - 2012-09-12 23:17:03 -0700 3122 3123 * australasia (Pacific/Fiji): Fiji DST is October 21 through January 3124 20 this year. (Thanks to Steffen Thorsen.) 3125 3126 3127 Release 2012e - 2012-08-02 20:44:55 -0700 3128 3129 * australasia (Pacific/Fakaofo): Tokelau is UT +13, not +14. 3130 (Thanks to Steffen Thorsen.) 3131 3132 * Use a single version number for both code and data. 3133 3134 * .gitignore: New file. 3135 3136 * Remove trailing white space. 3137 3138 3139 Release code2012c-data2012d - 2012-07-19 16:35:33 -0700 3140 3141 Changes for Morocco's timestamps, which take effect in a couple of 3142 hours, along with infrastructure changes to accommodate how the tz 3143 code and data are released on IANA. 3144 3145 3146 Release data2012c - 2012-03-27 12:17:25 -0400 3147 3148 africa 3149 Summer time changes for Morocco (to start late April 2012) 3150 3151 asia 3152 Changes for 2012 for Gaza & the West Bank (Hebron) and Syria 3153 3154 northamerica 3155 Haiti following US/Canada rules for 2012 (and we're assuming, 3156 for now anyway, for the future). 3157 3158 3159 Release 2012b - 2012-03-02 12:29:15 +0700 3160 3161 There is just one change to tzcode2012b (compared with 2012a): 3162 the Makefile that was accidentally included with 2012a has been 3163 replaced with the version that should have been there, which is 3164 identical with the previous version (from tzcode2011i). 3165 3166 There are just two changes in tzdata2012b compared with 2012a. 3167 3168 Most significantly, summer time in Cuba has been delayed 3 weeks 3169 (now starts April 1 rather than March 11). Since Mar 11 (the old start 3170 date, as listed in 2012a) is just a little over a week away, this 3171 change is urgent. 3172 3173 Less importantly, an excess tab in one of the changes in zone.tab 3174 in 2012a has been removed. 3175 3176 3177 Release 2012a - 2012-03-01 18:28:10 +0700 3178 3179 The changes in tzcode2012a (compared to the previous version, 2011i) 3180 are entirely to the README and tz-art.htm and tz-link.htm files, if 3181 none of those concern you, you can ignore the code update. The changes 3182 reflect the changed addresses for the mailing list and the code and 3183 data distribution points & methods (and a link to DateTime::TimeZone::Tzfile 3184 has been added to tz-link.htm). 3185 3186 In tzdata2012a (compared to the previous release, which was 2011n) 3187 the major changes are: 3188 Chile 2011/2012 and 2012/2013 summer time date adjustments. 3189 Falkland Islands onto permanent summer time (we're assuming for the 3190 foreseeable future, though 2012 is all we're fairly certain of.) 3191 Armenia has abolished Summer Time. 3192 Tokelau jumped the International Date Line back last December 3193 (just the same as their near neighbour, Samoa). 3194 America/Creston is a new zone for a small area of British Columbia 3195 There will be a leapsecond 2012-06-30 23:59:60 UTC. 3196 3197 Other minor changes are: 3198 Corrections to 1918 Canadian summer time end dates. 3199 Updated URL for UK time zone history (in comments) 3200 A few typos in Le Corre's list of free French place names (comments) 3201 3202 3203 Release data2011n - 2011-10-30 14:57:54 +0700 3204 3205 There are three changes of note - most urgently, Cuba (America/Havana) 3206 has extended summer time by two weeks, now to end on Nov 13, rather than 3207 the (already past) Oct 30. Second, the Pridnestrovian Moldavian Republic 3208 (Europe/Tiraspol) decided not to split from the rest of Moldova after 3209 all, and consequently that zone has been removed (again) and reinstated 3210 in the "backward" file as a link to Europe/Chisinau. And third, the 3211 end date for Fiji's summer time this summer was moved forward from the 3212 earlier planned Feb 26, to Jan 22. 3213 3214 Apart from that, Moldova (MD) returns to a single entry in zone.tab 3215 (and the incorrect syntax that was in the 2011m version of that file 3216 is so fixed - it would have been fixed in a different way had this 3217 change not happened - that's the "missing" sccs version id). 3218 3219 3220 Release data2011m - 2011-10-24 21:42:16 +0700 3221 3222 In particular, the typos in comments in the data (2011-11-17 should have 3223 been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that 3224 Tim Parenti noted) have been fixed, and the change for Ukraine has been 3225 made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to 3226 Tim Parenti, and also Denys Gavrysh) 3227 3228 In addition, I added Europe/Tiraspol to zone.tab. 3229 3230 This time, all the files have new version numbers... (including the files 3231 otherwise unchanged in 2011m that were changed in 2011l but didn't get new 3232 version numbers there...) 3233 3234 3235 Release data2011l - 2011-10-10 11:15:43 +0700 3236 3237 There are just 2 changes that cause different generated tzdata files from 3238 zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil 3239 is included, but commented out. Compared with the diff I sent out last week, 3240 this version also includes attributions for the sources for the changes 3241 (in much the same format as ado used, but the html tags have not been 3242 checked, verified, or used in any way at all, so if there are errors there, 3243 please let me know.) 3244 3245 3246 Release data2011k - 2011-09-20 17:54:03 -0400 3247 3248 [not summarized] 3249 3250 3251 Release data2011j - 2011-09-12 09:22:49 -0400 3252 3253 (contemporary changes for Samoa; past changes for Kenya, Uganda, and 3254 Tanzania); there are also two spelling corrections to comments in 3255 the australasia file (with thanks to Christos Zoulas). 3256 3257 3258 Release 2011i - 2011-08-29 05:56:32 -0400 3259 3260 [not summarized] 3261 3262 3263 Release data2011h - 2011-06-15 18:41:48 -0400 3264 3265 Russia and Curaao changes 3266 3267 3268 Release 2011g - 2011-04-25 09:07:22 -0400 3269 3270 update the rules for Egypt to reflect its abandonment of DST this year 3271 3272 3273 Release 2011f - 2011-04-06 17:14:53 -0400 3274 3275 [not summarized] 3276 3277 3278 Release 2011e - 2011-03-31 16:04:38 -0400 3279 3280 Morocco, Chile, and tz-link changes 3281 3282 3283 Release 2011d - 2011-03-14 09:18:01 -0400 3284 3285 changes that impact present-day timestamps in Cuba, Samoa, and Turkey 3286 3287 3288 Release 2011c - 2011-03-07 09:30:09 -0500 3289 3290 These do affect current timestamps in Chile and Annette Island, Canada. 3291 3292 3293 Release 2011b - 2011-02-07 08:44:50 -0500 3294 3295 [not summarized] 3296 3297 3298 Release 2011a - 2011-01-24 10:30:16 -0500 3299 3300 [not summarized] 3301 3302 3303 Release data2010o - 2010-11-01 09:18:23 -0400 3304 3305 change to the end of DST in Fiji in 2011 3306 3307 3308 Release 2010n - 2010-10-25 08:19:17 -0400 3309 3310 [not summarized] 3311 3312 3313 Release 2010m - 2010-09-27 09:24:48 -0400 3314 3315 Hong Kong, Vostok, and zic.c changes 3316 3317 3318 Release 2010l - 2010-08-16 06:57:25 -0400 3319 3320 [not summarized] 3321 3322 3323 Release 2010k - 2010-07-26 10:42:27 -0400 3324 3325 [not summarized] 3326 3327 3328 Release 2010j - 2010-05-10 09:07:48 -0400 3329 3330 changes for Baha de Banderas and for version naming 3331 3332 3333 Release data2010i - 2010-04-16 18:50:45 -0400 3334 3335 the end of DST in Morocco on 2010-08-08 3336 3337 3338 Release data2010h - 2010-04-05 09:58:56 -0400 3339 3340 [not summarized] 3341 3342 3343 Release data2010g - 2010-03-24 11:14:53 -0400 3344 3345 [not summarized] 3346 3347 3348 Release 2010f - 2010-03-22 09:45:46 -0400 3349 3350 [not summarized] 3351 3352 3353 Release data2010e - 2010-03-08 14:24:27 -0500 3354 3355 corrects the Dhaka bug found by Danvin Ruangchan 3356 3357 3358 Release data2010d - 2010-03-06 07:26:01 -0500 3359 3360 [not summarized] 3361 3362 3363 Release 2010c - 2010-03-01 09:20:58 -0500 3364 3365 changes including KRE's suggestion for earlier initialization of 3366 "goahead" and "goback" structure elements 3367 3368 3369 Release code2010a - 2010-02-16 10:40:04 -0500 3370 3371 [not summarized] 3372 3373 3374 Release data2010b - 2010-01-20 12:37:01 -0500 3375 3376 Mexico changes 3377 3378 3379 Release data2010a - 2010-01-18 08:30:04 -0500 3380 3381 changes to Dhaka 3382 3383 3384 Release data2009u - 2009-12-26 08:32:28 -0500 3385 3386 changes to DST in Bangladesh 3387 3388 3389 Release 2009t - 2009-12-21 13:24:27 -0500 3390 3391 [not summarized] 3392 3393 3394 Release data2009s - 2009-11-14 10:26:32 -0500 3395 3396 (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change 3397 3398 3399 Release 2009r - 2009-11-09 10:10:31 -0500 3400 3401 "antarctica" and "tz-link.htm" changes 3402 3403 3404 Release 2009q - 2009-11-02 09:12:40 -0500 3405 3406 with two corrections as reported by Eric Muller and Philip Newton 3407 3408 3409 Release data2009p - 2009-10-23 15:05:27 -0400 3410 3411 Argentina (including San Luis) changes (with the correction from 3412 Mariano Absatz) 3413 3414 3415 Release data2009o - 2009-10-14 16:49:38 -0400 3416 3417 Samoa (commentary only), Pakistan, and Bangladesh changes 3418 3419 3420 Release data2009n - 2009-09-22 15:13:38 -0400 3421 3422 added commentary for Argentina and a change to the end of DST in 3423 2009 in Pakistan 3424 3425 3426 Release data2009m - 2009-09-03 10:23:43 -0400 3427 3428 Samoa and Palestine changes 3429 3430 3431 Release data2009l - 2009-08-14 09:13:07 -0400 3432 3433 Samoa (comments only) and Egypt 3434 3435 3436 Release 2009k - 2009-07-20 09:46:08 -0400 3437 3438 [not summarized] 3439 3440 3441 Release data2009j - 2009-06-15 06:43:59 -0400 3442 3443 Bangladesh change (with a short turnaround since the DST change is 3444 impending) 3445 3446 3447 Release 2009i - 2009-06-08 09:21:22 -0400 3448 3449 updating for DST in Bangladesh this year 3450 3451 3452 Release 2009h - 2009-05-26 09:19:14 -0400 3453 3454 [not summarized] 3455 3456 3457 Release data2009g - 2009-04-20 16:34:07 -0400 3458 3459 Cairo 3460 3461 3462 Release data2009f - 2009-04-10 11:00:52 -0400 3463 3464 correct DST in Pakistan 3465 3466 3467 Release 2009e - 2009-04-06 09:08:11 -0400 3468 3469 [not summarized] 3470 3471 3472 Release 2009d - 2009-03-23 09:38:12 -0400 3473 3474 Morocco, Tunisia, Argentina, and American Astronomical Society changes 3475 3476 3477 Release data2009c - 2009-03-16 09:47:51 -0400 3478 3479 change to the start of Cuban DST 3480 3481 3482 Release 2009b - 2009-02-09 11:15:22 -0500 3483 3484 [not summarized] 3485 3486 3487 Release 2009a - 2009-01-21 10:09:39 -0500 3488 3489 [not summarized] 3490 3491 3492 Release data2008i - 2008-10-21 12:10:25 -0400 3493 3494 southamerica and zone.tab files, with Argentina DST rule changes and 3495 United States zone reordering and recommenting 3496 3497 3498 Release 2008h - 2008-10-13 07:33:56 -0400 3499 3500 [not summarized] 3501 3502 3503 Release 2008g - 2008-10-06 09:03:18 -0400 3504 3505 Fix a broken HTML anchor and update Brazil's DST transitions; 3506 there's also a slight reordering of information in tz-art.htm. 3507 3508 3509 Release data2008f - 2008-09-09 22:33:26 -0400 3510 3511 [not summarized] 3512 3513 3514 Release 2008e - 2008-07-28 14:11:17 -0400 3515 3516 changes by Arthur David Olson and Jesper Nrgaard Welen 3517 3518 3519 Release data2008d - 2008-07-07 09:51:38 -0400 3520 3521 changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo 3522 3523 3524 Release data2008c - 2008-05-19 17:48:03 -0400 3525 3526 Pakistan, Morocco, and Mongolia 3527 3528 3529 Release data2008b - 2008-03-24 08:30:59 -0400 3530 3531 including renaming Asia/Calcutta to Asia/Kolkata, with a backward 3532 link provided 3533 3534 3535 Release 2008a - 2008-03-08 05:42:16 -0500 3536 3537 [not summarized] 3538 3539 3540 Release 2007k - 2007-12-31 10:25:22 -0500 3541 3542 most importantly, changes to the "southamerica" file based on 3543 Argentina's readoption of daylight saving time 3544 3545 3546 Release 2007j - 2007-12-03 09:51:01 -0500 3547 3548 1. eliminate the "P" (parameter) macro; 3549 3550 2. the "noncontroversial" changes circulated on the time zone 3551 mailing list (less the changes to "logwtmp.c"); 3552 3553 3. eliminate "too many transition" errors when "min" is used in time 3554 zone rules; 3555 3556 4. changes by Paul Eggert (including updated information for Venezuela). 3557 3558 3559 Release data2007i - 2007-10-30 10:28:11 -0400 3560 3561 changes for Cuba and Syria 3562 3563 3564 Release 2007h - 2007-10-01 10:05:51 -0400 3565 3566 changes by Paul Eggert, as well as an updated link to the ICU 3567 project in tz-link.htm 3568 3569 3570 Release 2007g - 2007-08-20 10:47:59 -0400 3571 3572 changes by Paul Eggert 3573 3574 The "leapseconds" file has been updated to incorporate the most 3575 recent International Earth Rotation and Reference Systems Service 3576 (IERS) bulletin. 3577 3578 There's an addition to tz-art.htm regarding the television show "Medium". 3579 3580 3581 Release 2007f - 2007-05-07 10:46:46 -0400 3582 3583 changes by Paul Eggert (including Haiti, Turks and Caicos, and New 3584 Zealand) 3585 3586 changes to zic.c to allow hour values greater than 24 (along with 3587 Paul's improved time value overflow checking) 3588 3589 3590 Release 2007e - 2007-04-02 10:11:52 -0400 3591 3592 Syria and Honduras changes by Paul Eggert 3593 3594 zic.c variable renaming changes by Arthur David Olson 3595 3596 3597 Release 2007d - 2007-03-20 08:48:30 -0400 3598 3599 changes by Paul Eggert 3600 3601 the elimination of white space at the ends of lines 3602 3603 3604 Release 2007c - 2007-02-26 09:09:37 -0500 3605 3606 changes by Paul Eggert 3607 3608 3609 Release 2007b - 2007-02-12 09:34:20 -0500 3610 3611 Paul Eggert's proposed change to the quotation handling logic in zic.c. 3612 3613 changes to the commentary in "leapseconds" reflecting the IERS 3614 announcement that there is to be no positive leap second at the end 3615 of June 2007. 3616 3617 3618 Release 2007a - 2007-01-08 12:28:29 -0500 3619 3620 changes by Paul Eggert 3621 3622 Derick Rethan's Asmara change 3623 3624 Oscar van Vlijmen's Easter Island local mean time change 3625 3626 symbolic link changes 3627 3628 3629 Release 2006p - 2006-11-27 08:54:27 -0500 3630 3631 changes by Paul Eggert 3632 3633 3634 Release 2006o - 2006-11-06 09:18:07 -0500 3635 3636 changes by Paul Eggert 3637 3638 3639 Release 2006n - 2006-10-10 11:32:06 -0400 3640 3641 changes by Paul Eggert 3642 3643 3644 Release 2006m - 2006-10-02 15:32:35 -0400 3645 3646 changes for Uruguay, Palestine, and Egypt by Paul Eggert 3647 3648 (minimalist) changes to zic.8 to clarify "until" information 3649 3650 3651 Release data2006l - 2006-09-18 12:58:11 -0400 3652 3653 Paul's best-effort work on this coming weekend's Egypt time change 3654 3655 3656 Release 2006k - 2006-08-28 12:19:09 -0400 3657 3658 changes by Paul Eggert 3659 3660 3661 Release 2006j - 2006-08-21 09:56:32 -0400 3662 3663 changes by Paul Eggert 3664 3665 3666 Release code2006i - 2006-08-07 12:30:55 -0400 3667 3668 localtime.c fixes 3669 3670 Ken Pizzini's conversion script 3671 3672 3673 Release code2006h - 2006-07-24 09:19:37 -0400 3674 3675 adds public domain notices to four files 3676 3677 includes a fix for transition times being off by a second 3678 3679 adds a new recording to the "arts" file (information courtesy Colin Bowern) 3680 3681 3682 Release 2006g - 2006-05-08 17:18:09 -0400 3683 3684 northamerica changes by Paul Eggert 3685 3686 3687 Release 2006f - 2006-05-01 11:46:00 -0400 3688 3689 a missing version number problem is fixed (with thanks to Bradley 3690 White for catching the problem) 3691 3692 3693 Release 2006d - 2006-04-17 14:33:43 -0400 3694 3695 changes by Paul Eggert 3696 3697 added new items to tz-arts.htm that were found by Paul 3698 3699 3700 Release 2006c - 2006-04-03 10:09:32 -0400 3701 3702 two sets of data changes by Paul Eggert 3703 3704 a fencepost error fix in zic.c 3705 3706 changes to zic.c and the "europe" file to minimize differences 3707 between output produced by the old 32-bit zic and the new 64-bit 3708 version 3709 3710 3711 Release 2006b - 2006-02-20 10:08:18 -0500 3712 [tz32code2006b + tz64code2006b + tzdata2006b] 3713 3714 64-bit code 3715 3716 All SCCS IDs were bumped to "8.1" for this release. 3717 3718 3719 Release 2006a - 2006-01-30 08:59:31 -0500 3720 3721 changes by Paul Eggert (in particular, Indiana time zone moves) 3722 3723 an addition to the zic manual page to describe how special-case 3724 transitions are handled 3725 3726 3727 Release 2005r - 2005-12-27 09:27:13 -0500 3728 3729 Canadian changes by Paul Eggert 3730 3731 They also add "<pre>" directives to time zone data files and reflect 3732 changes to warning message logic in "zdump.c" (but with calls to 3733 "gettext" kept unbundled at the suggestion of Ken Pizzini). 3734 3735 3736 Release 2005q - 2005-12-13 09:17:09 -0500 3737 3738 Nothing earth-shaking here: 3739 1. Electronic mail addresses have been removed. 3740 2. Casts of the return value of exit have been removed. 3741 3. Casts of the argument of is.* macros have been added. 3742 4. Indentation in one section of zic.c has been fixed. 3743 5. References to dead URLs in the data files have been dealt with. 3744 3745 3746 Release 2005p - 2005-12-05 10:30:53 -0500 3747 3748 "systemv", "tz-link.htm", and "zdump.c" changes 3749 (less the casts of arguments to the is* macros) 3750 3751 3752 Release 2005o - 2005-11-28 10:55:26 -0500 3753 3754 Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert 3755 3756 zdump.c lint fixes by Arthur David Olson 3757 3758 3759 Release 2005n - 2005-10-03 09:44:09 -0400 3760 3761 changes by Paul Eggert (both the Uruguay changes and the Kyrgyzstan 3762 et al. changes) 3763 3764 3765 Release 2005m - 2005-08-29 12:15:40 -0400 3766 3767 changes by Paul Eggert (with a small tweak to the tz-art change) 3768 3769 a declaration of an unused variable has been removed from zdump.c 3770 3771 3772 Release 2005l - 2005-08-22 12:06:39 -0400 3773 3774 changes by Paul Eggert 3775 3776 overflow/underflow checks by Arthur David Olson, minus changes to 3777 the "Theory" file about the pending addition of 64-bit data (I grow 3778 less confident of the changes being accepted with each passing day, 3779 and the changes no longer increase the data files nine-fold--there's 3780 less than a doubling in size by my local Sun's reckoning) 3781 3782 3783 Release 2005k - 2005-07-14 14:14:24 -0400 3784 3785 The "leapseconds" file has been edited to reflect the recently 3786 announced leap second at the end of 2005. 3787 3788 I've also deleted electronic mail addresses from the files as an 3789 anti-spam measure. 3790 3791 3792 Release 2005j - 2005-06-13 14:34:13 -0400 3793 3794 These reflect changes to limit the length of time zone abbreviations 3795 and the characters used in those abbreviations. 3796 3797 There are also changes to handle POSIX-style "quoted" timezone 3798 environment variables. 3799 3800 The changes were circulated on the time zone mailing list; the only 3801 change since then was the removal of a couple of minimum-length of 3802 abbreviation checks. 3803 3804 3805 Release data2005i - 2005-04-21 15:04:16 -0400 3806 3807 changes (most importantly to Nicaragua and Haiti) by Paul Eggert 3808 3809 3810 Release 2005h - 2005-04-04 11:24:47 -0400 3811 3812 changes by Paul Eggert 3813 3814 minor changes to Makefile and zdump.c to produce more useful output 3815 when doing a "make typecheck" 3816 3817 3818 Release 2005g - 2005-03-14 10:11:21 -0500 3819 3820 changes by Paul Eggert (a change to current DST rules in Uruguay and 3821 an update to a link to time zone software) 3822 3823 3824 Release 2005f - 2005-03-01 08:45:32 -0500 3825 3826 data and documentation changes by Paul Eggert 3827 3828 3829 Release 2005e - 2005-02-10 15:59:44 -0500 3830 3831 [not summarized] 3832 3833 3834 Release code2005d - 2005-01-31 09:21:47 -0500 3835 3836 make zic complain about links to links if the -v flag is used 3837 3838 have "make public" do more code checking 3839 3840 add an include to "localtime.c" for the benefit of gcc systems 3841 3842 3843 Release 2005c - 2005-01-17 18:36:29 -0500 3844 3845 get better results when mktime runs on a system where time_t is double 3846 3847 changes to the data files (most importantly to Paraguay) 3848 3849 3850 Release 2005b - 2005-01-10 09:19:54 -0500 3851 3852 Get localtime and gmtime working on systems with exotic time_t types. 3853 3854 Update the leap second commentary in the "leapseconds" file. 3855 3856 3857 Release 2005a - 2005-01-01 13:13:44 -0500 3858 3859 [not summarized] 3860 3861 3862 Release code2004i - 2004-12-14 13:42:58 -0500 3863 3864 Deal with systems where time_t is unsigned. 3865 3866 3867 Release code2004h - 2004-12-07 11:40:18 -0500 3868 3869 64-bit-time_t changes 3870 3871 3872 Release 2004g - 2004-11-02 09:06:01 -0500 3873 3874 update to Cuba (taking effect this weekend) 3875 3876 other changes by Paul Eggert 3877 3878 correction of the spelling of Oslo 3879 3880 changed versions of difftime.c and private.h 3881 3882 3883 Release code2004f - 2004-10-21 10:25:22 -0400 3884 3885 Cope with wide-ranging tm_year values. 3886 3887 3888 Release 2004e - 2004-10-11 14:47:21 -0400 3889 3890 Brazil/Argentina/Israel changes by Paul Eggert 3891 3892 changes to tz-link.htm by Paul 3893 3894 one small fix to Makefile 3895 3896 3897 Release 2004d - 2004-09-22 08:27:29 -0400 3898 3899 Avoid overflow problems when TM_YEAR_BASE is added to an integer. 3900 3901 3902 Release 2004c - 2004-08-11 12:06:26 -0400 3903 3904 asctime-related changes 3905 3906 (variants of) some of the documentation changes suggested by Paul Eggert 3907 3908 3909 Release 2004b - 2004-07-19 14:33:35 -0400 3910 3911 data changes by Paul Eggert - most importantly, updates for Argentina 3912 3913 3914 Release 2004a - 2004-05-27 12:00:47 -0400 3915 3916 changes by Paul Eggert 3917 3918 Handle DST transitions that occur at the end of a month in some 3919 years but at the start of the following month in other years. 3920 3921 Add a copy of the correspondence that's the basis for claims about 3922 DST in the Navajo Nation. 3923 3924 3925 Release 2003e - 2003-12-15 09:36:47 -0500 3926 3927 changes by Arthur David Olson (primarily code changes) 3928 3929 changes by Paul Eggert (primarily data changes) 3930 3931 minor changes to "Makefile" and "northamerica" (in the latter case, 3932 optimization of the "Toronto" rules) 3933 3934 3935 Release 2003d - 2003-10-06 09:34:44 -0400 3936 3937 changes by Paul Eggert 3938 3939 3940 Release 2003c - 2003-09-16 10:47:05 -0400 3941 3942 Fix bad returns in zic.c's inleap function. 3943 Thanks to Bradley White for catching the problem! 3944 3945 3946 Release 2003b - 2003-09-16 07:13:44 -0400 3947 3948 Add a "--version" option (and documentation) to the zic and zdump commands. 3949 3950 changes to overflow/underflow checking in zic 3951 3952 a localtime typo fix. 3953 3954 Update the leapseconds and tz-art.htm files. 3955 3956 3957 Release 2003a - 2003-03-24 09:30:54 -0500 3958 3959 changes by Paul Eggert 3960 3961 a few additions and modifications to the tz-art.htm file 3962 3963 3964 Release 2002d - 2002-10-15 13:12:42 -0400 3965 3966 changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab 3967 3968 There's also a new time zone quote in "tz-art.htm". 3969 3970 3971 Release 2002c - 2002-04-04 11:55:20 -0500 3972 3973 changes by Paul Eggert 3974 3975 Change zic.c to avoid creating symlinks to files that don't exist. 3976 3977 3978 Release 2002b - 2002-01-28 12:56:03 -0500 3979 3980 [These change notes are for Release 2002a, which was corrupted. 3981 2002b was a corrected version of 2002a.] 3982 3983 changes by Paul Eggert 3984 3985 Update the "leapseconds" file to note that there'll be no leap 3986 second at the end of June, 2002. 3987 3988 Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone. 3989 3990 Change to "difftime.c" to avoid sizeof problems. 3991 3992 3993 Release 2001d - 2001-10-09 13:31:32 -0400 3994 3995 changes by Paul Eggert 3996 3997 3998 Release 2001c - 2001-06-05 13:59:55 -0400 3999 4000 changes by Paul Eggert and Andrew Brown 4001 4002 4003 Release 2001b - 2001-04-05 16:44:38 -0400 4004 4005 changes by Paul Eggert (modulo jnorgard's typo fix) 4006 4007 tz-art.htm has been HTMLified. 4008 4009 4010 Release 2001a - 2001-03-13 12:57:44 -0500 4011 4012 changes by Paul Eggert 4013 4014 An addition to the "leapseconds" file: comments with the text of the 4015 latest IERS leap second notice. 4016 4017 Trailing white space has been removed from data file lines, and 4018 repeated spaces in "Rule Jordan" lines in the "asia" file have been 4019 converted to tabs. 4020 4021 4022 Release 2000h - 2000-12-14 15:33:38 -0500 4023 4024 changes by Paul Eggert 4025 4026 one typo fix in the "art" file 4027 4028 With providence, this is the last update of the millennium. 4029 4030 4031 Release 2000g - 2000-10-10 11:35:22 -0400 4032 4033 changes by Paul Eggert 4034 4035 correction of John Mackin's name submitted by Robert Elz 4036 4037 Garry Shandling's Daylight Saving Time joke (!?!) from the recent 4038 Emmy Awards broadcast. 4039 4040 4041 Release 2000f - 2000-08-10 09:31:58 -0400 4042 4043 changes by Paul Eggert 4044 4045 Added information in "tz-art.htm" on a Seinfeld reference to DST. 4046 4047 Error checking and messages in the "yearistype" script have been 4048 improved. 4049 4050 4051 Release 2000e - 2000-07-31 09:27:54 -0400 4052 4053 data changes by Paul Eggert 4054 4055 a change to the default value of the defined constant HAVE_STRERROR 4056 4057 the addition of a Dave Barry quote on DST to the tz-arts file 4058 4059 4060 Release 2000d - 2000-04-20 15:43:04 -0400 4061 4062 changes to the documentation and code of strftime for C99 conformance 4063 4064 a bug fix for date.c 4065 4066 These are based on (though modified from) changes by Paul Eggert. 4067 4068 4069 Release 2000c - 2000-03-04 10:31:43 -0500 4070 4071 changes by Paul Eggert 4072 4073 4074 Release 2000b - 2000-02-21 12:16:29 -0500 4075 4076 changes by Paul Eggert and Joseph Myers 4077 4078 modest tweaks to the tz-art.htm and tz-link.htm files 4079 4080 4081 Release 2000a - 2000-01-18 09:21:26 -0500 4082 4083 changes by Paul Eggert 4084 4085 The two hypertext documents have also been renamed. 4086 4087 4088 Release code1999i-data1999j - 1999-11-15 18:43:22 -0500 4089 4090 Paul Eggert's changes 4091 4092 additions to the "zic" manual page and the "Arts.htm" file 4093 4094 4095 Release code1999h-data1999i - 1999-11-08 14:55:21 -0500 4096 4097 [not summarized] 4098 4099 4100 Release data1999h - 1999-10-07 03:50:29 -0400 4101 4102 changes by Paul Eggert to "europe" (most importantly, fixing 4103 Lithuania and Estonia) 4104 4105 4106 Release 1999g - 1999-09-28 11:06:18 -0400 4107 4108 data changes by Paul Eggert (most importantly, the change for 4109 Lebanon that buys correctness for this coming Sunday) 4110 4111 The "code" file contains changes to "Makefile" and "checktab.awk" to 4112 allow better checking of time zone files before they are published. 4113 4114 4115 Release 1999f - 1999-09-23 09:48:14 -0400 4116 4117 changes by Arthur David Olson and Paul Eggert 4118 4119 4120 Release 1999e - 1999-08-17 15:20:54 -0400 4121 4122 changes circulated by Paul Eggert, although the change to handling 4123 of DST-specifying timezone names has been commented out for now 4124 (search for "XXX" in "localtime.c" for details). These files also 4125 do not make any changes to the start of DST in Brazil. 4126 4127 In addition to Paul's changes, there are updates to "Arts.htm" and 4128 cleanups of URLs. 4129 4130 4131 Release 1999d - 1999-03-30 11:31:07 -0500 4132 4133 changes by Paul Eggert 4134 4135 The Makefile's "make public" rule has also been changed to do a test 4136 compile of each individual time zone data file (which should help 4137 avoid problems such as the one we had with Nicosia). 4138 4139 4140 Release 1999c - 1999-03-25 09:47:47 -0500 4141 4142 changes by Paul Eggert, most importantly the change for Chile. 4143 4144 4145 Release 1999b - 1999-02-01 17:51:44 -0500 4146 4147 changes by Paul Eggert 4148 4149 code changes (suggested by Mani Varadarajan, mani at be.com) for 4150 correct handling of symbolic links when building using a relative directory 4151 4152 code changes to generate correct messages for failed links 4153 4154 updates to the URLs in Arts.htm 4155 4156 4157 Release 1999a - 1999-01-19 16:20:29 -0500 4158 4159 error message internationalizations and corrections in zic.c and 4160 zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz, 4161 to whom thanks!) 4162 4163 4164 Release code1998h-data1998i - 1998-10-01 09:56:10 -0400 4165 4166 changes for Brazil, Chile, and Germany 4167 4168 support for use of "24:00" in the input files for the time zone compiler 4169 4170 4171 Release code1998g-data1998h - 1998-09-24 10:50:28 -0400 4172 4173 changes by Paul Eggert 4174 4175 correction to a define in the "private.h" file 4176 4177 4178 Release data1998g - 1998-08-11 03:28:35 -0000 4179 [tzdata1998g.tar.gz is missing!] 4180 4181 Lithuanian change provided by mgedmin at pub.osf.it 4182 4183 Move creation of the GMT link with Etc/GMT to "etcetera" (from 4184 "backward") to ensure that the GMT file is created even where folks 4185 don't want the "backward" links (as suggested by Paul Eggert). 4186 4187 4188 Release data1998f - 1998-07-20 13:50:00 -0000 4189 [tzdata1998f.tar.gz is missing!] 4190 4191 Update the "leapseconds" file to include the newly-announced 4192 insertion at the end of 1998. 4193 4194 4195 Release code1998f - 1998-06-01 10:18:31 -0400 4196 4197 addition to localtime.c by Guy Harris 4198 4199 4200 Release 1998e - 1998-05-28 09:56:26 -0400 4201 4202 The Makefile is changed to produce zoneinfo-posix rather than 4203 zoneinfo/posix, and to produce zoneinfo-leaps rather than 4204 zoneinfo/right. 4205 4206 data changes by Paul Eggert 4207 4208 changes from Guy Harris to provide asctime_r and ctime_r 4209 4210 A usno1998 file (substantially identical to usno1997) has been added. 4211 4212 4213 Release 1998d - 1998-05-14 11:58:34 -0400 4214 4215 changes to comments (in particular, elimination of references to CIA maps). 4216 "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places 4217 where changes occur. 4218 4219 4220 Release 1998c - 1998-02-28 12:32:26 -0500 4221 4222 changes by Paul Eggert (save the "French correction," on which I'll 4223 wait for the dust to settle) 4224 4225 symlink changes 4226 4227 changes and additions to Arts.htm 4228 4229 4230 Release 1998b - 1998-01-17 14:31:51 -0500 4231 4232 URL cleanups and additions 4233 4234 4235 Release 1998a - 1998-01-13 12:37:35 -0500 4236 4237 changes by Paul Eggert 4238 4239 4240 Release code1997i-data1997k - 1997-12-29 09:53:41 -0500 4241 4242 changes by Paul Eggert, with minor modifications from Arthur David 4243 Olson to make the files more browser friendly 4244 4245 4246 Release code1997h-data1997j - 1997-12-18 17:47:35 -0500 4247 4248 minor changes to put "TZif" at the start of each timezone information file 4249 4250 a rule has also been added to the Makefile so you can 4251 make zones 4252 to just recompile the zone information files (rather than doing a 4253 full "make install" with its other effects). 4254 4255 4256 Release data1997i - 1997-10-07 08:45:38 -0400 4257 4258 changes to Africa by Paul Eggert 4259 4260 4261 Release code1997g-data1997h - 1997-09-04 16:56:54 -0400 4262 4263 corrections for Uruguay (and other locations) 4264 4265 Arthur David Olson's simple-minded fix allowing mktime to both 4266 correctly handle leap seconds and correctly handle tm_sec values 4267 upon which arithmetic has been performed. 4268 4269 4270 Release code1997f-data1997g - 1997-07-19 13:15:02 -0400 4271 4272 Paul Eggert's updates 4273 4274 a small change to a function prototype; 4275 4276 "Music" has been renamed "Arts.htm", HTMLified, and augmented to 4277 include information on Around the World in Eighty Days. 4278 4279 4280 Release code1997e-data1997f - 1997-05-03 18:52:34 -0400 4281 4282 fixes to zic's error handling 4283 4284 changes inspired by the item circulated on Slovenia 4285 4286 The description of Web resources has been HTMLified for browsing 4287 convenience. 4288 4289 A new piece of tz-related music has been added to the "Music" file. 4290 4291 4292 Release code1997d-data1997e - 1997-03-29 12:48:52 -0500 4293 4294 Paul Eggert's latest suggestions 4295 4296 4297 Release code1997c-data1997d - 1997-03-07 20:37:54 -0500 4298 4299 changes to "zic.c" to correct performance of the "-s" option 4300 4301 a new file "usno1997" 4302 4303 4304 Release data1997c - 1997-03-04 09:58:18 -0500 4305 4306 changes in Israel 4307 4308 4309 Release 1997b - 1997-02-27 18:34:19 -0500 4310 4311 The data file incorporates the 1997 leap second. 4312 4313 The code file incorporates Arthur David Olson's take on the 4314 zic/multiprocessor/directory-creation situation. 4315 4316 4317 Release 1997a - 1997-01-21 09:11:10 -0500 4318 4319 Paul Eggert's Antarctica (and other changes) 4320 4321 Arthur David Olson finessed the "getopt" issue by checking against 4322 both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1 4323 is returned while SunOS 5.5's manual says EOF is returned). 4324 4325 4326 Release code1996o-data1996n - 1996-12-27 21:42:05 -0500 4327 4328 Paul Eggert's latest changes 4329 4330 4331 Release code1996n - 1996-12-16 09:42:02 -0500 4332 4333 link snapping fix from Bruce Evans (via Garrett Wollman) 4334 4335 4336 Release data1996m - 1996-11-24 02:37:34 -0000 4337 [tzdata1996m.tar.gz is missing!] 4338 4339 Paul Eggert's batch of changes 4340 4341 4342 Release code1996m-data1996l - 1996-11-05 14:00:12 -0500 4343 4344 No functional changes here; the files have simply been changed to 4345 make more use of ISO style dates in comments. The names of the above 4346 files now include the year in full. 4347 4348 4349 Release code96l - 1996-09-08 17:12:20 -0400 4350 4351 tzcode96k was missing a couple of pieces. 4352 4353 4354 Release 96k - 1996-09-08 16:06:22 -0400 4355 4356 the latest round of changes from Paul Eggert 4357 4358 the recent Year 2000 material 4359 4360 4361 Release code96j - 1996-07-30 13:18:53 -0400 4362 4363 Set sp->typecnt as suggested by Timothy Patrick Murphy. 4364 4365 4366 Release code96i - 1996-07-27 20:11:35 -0400 4367 4368 Paul's suggested patch for strftime %V week numbers 4369 4370 4371 Release data96i - 1996-07-01 18:13:04 -0400 4372 4373 "northamerica" and "europe" changes by Paul Eggert 4374 4375 4376 Release code96h - 1996-06-05 08:02:21 -0400 4377 4378 fix for handling transitions specified in Universal Time 4379 4380 Some "public domain" notices have also been added. 4381 4382 4383 Release code96g - 1996-05-16 14:00:26 -0400 4384 4385 fix for the simultaneous-DST-and-zone-change challenge 4386 4387 4388 Release data96h - 1996-05-09 17:40:51 -0400 4389 4390 changes by Paul Eggert 4391 4392 4393 Release code96f-data96g - 1996-05-03 03:09:59 -0000 4394 [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!] 4395 4396 The changes get us some of the way to fixing the problems noted in Paul 4397 Eggert's letter yesterday (in addition to a few others). The approach 4398 has been to make zic a bit smarter about figuring out what time zone 4399 abbreviations apply just after the time specified in the "UNTIL" part 4400 of a zone line. Putting the smarts in zic means avoiding having 4401 transition times show up in both "Zone" lines and "Rule" lines, which 4402 in turn avoids multiple transition time entries in time zone files. 4403 (This also makes the zic input files such as "europe" a bit shorter and 4404 should ease maintenance.) 4405 4406 4407 Release data96f - 1996-04-19 19:20:03 -0000 4408 [tzdata96f.tar.gz is missing!] 4409 4410 The only changes are to the "northamerica" file; the time zone 4411 abbreviation for Denver is corrected to MST (and MDT), and the 4412 comments for Mexico have been updated. 4413 4414 4415 Release data96e - 1996-03-19 17:37:26 -0500 4416 4417 Proposals by Paul Eggert, in particular the Portugal change that 4418 comes into play at the end of this month. 4419 4420 4421 Release data96d - 1996-03-18 20:49:39 -0500 4422 4423 [not summarized] 4424 4425 4426 Release code96e - 1996-02-29 15:43:27 -0000 4427 [tzcode96e.tar.gz is missing!] 4428 4429 internationalization changes and the fix to the documentation for strftime 4430 4431 4432 Release code96d-data96c - 1996-02-12 11:05:27 -0500 4433 4434 The "code" file simply updates Bob Kridle's electronic address. 4435 4436 The "data" file updates rules for Mexico. 4437 4438 4439 Release data96b - 1996-01-27 15:44:42 -0500 4440 4441 Kiribati change 4442 4443 4444 Release code96c - 1996-01-16 16:58:15 -0500 4445 4446 leap-year streamlining and binary-search changes 4447 4448 fix to newctime.3 4449 4450 4451 Release code96b - 1996-01-10 20:42:39 -0500 4452 4453 fixes and enhancements from Paul Eggert, including code that 4454 emulates the behavior of recent versions of the SunOS "date" 4455 command. 4456 4457 4458 Release 96a - 1996-01-06 09:08:24 -0500 4459 4460 Israel updates 4461 4462 fixes to strftime.c for correct ISO 8601 week number generation, 4463 plus support for two new formats ('G' and 'g') to give ISO 8601 year 4464 numbers (which are not necessarily the same as calendar year numbers) 4465 4466 4467 Release code95i-data95m - 1995-12-21 12:46:47 -0500 4468 4469 The latest revisions from Paul Eggert are included, the usno1995 4470 file has been updated, and a new file ("WWW") covering useful URLs 4471 has been added. 4472 4473 4474 Release code95h-data95l - 1995-12-19 18:10:12 -0500 4475 4476 A simplification of a macro definition, a change to data for Sudan, 4477 and (for last minute shoppers) notes in the "Music" file on the CD 4478 "Old Man Time". 4479 4480 4481 Release code95g-data95k - 1995-10-30 10:32:47 -0500 4482 4483 (slightly reformatted) 8-bit-clean proposed patch 4484 4485 minor patch: US/Eastern -> America/New_York 4486 4487 snapshot of the USNO's latest data ("usno1995") 4488 4489 some other minor cleanups 4490 4491 4492 Release code95f-data95j - 1995-10-28 21:01:34 -0000 4493 [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!] 4494 4495 European cleanups 4496 4497 support for 64-bit time_t's 4498 4499 optimization in localtime.c 4500 4501 4502 Release code95e - 1995-10-13 13:23:57 -0400 4503 4504 the mktime change to scan from future to past when trying to find time zone 4505 offsets 4506 4507 4508 Release data95i - 1995-09-26 10:43:26 -0400 4509 4510 For Canada/Central, guess that the Sun customer's "one week too 4511 early" was just a approximation, and the true error is one month 4512 too early. This is consistent with the rest of Canada. 4513 4514 4515 Release data95h - 1995-09-21 11:26:48 -0400 4516 4517 latest changes from Paul Eggert 4518 4519 4520 Release code95d - 1995-09-14 11:14:45 -0400 4521 4522 the addition of a "Music" file, which documents four recorded 4523 versions of the tune "Save That Time". 4524 4525 4526 Release data95g - 1995-09-01 17:21:36 -0400 4527 4528 "yearistype" correction 4529 4530 4531 Release data95f - 1995-08-28 20:46:56 -0400 4532 4533 Paul Eggert's change to the australasia file 4534 4535 4536 Release data95e - 1995-07-08 18:02:34 -0400 4537 4538 The only change is a leap second at the end of this year. 4539 Thanks to Bradley White for forwarding news on the leap second. 4540 4541 4542 Release data95d - 1995-07-03 13:26:22 -0400 4543 4544 Paul Eggert's changes 4545 4546 4547 Release data95c - 1995-07-02 19:19:28 -0400 4548 4549 changes to "asia", "backward", "europe", and "southamerica" 4550 (read: northamericacentrics need not apply) 4551 4552 4553 Release code95c - 1995-03-13 14:00:46 -0500 4554 4555 one-line fix for sign extension problems in detzcode 4556 4557 4558 Release 95b - 1995-03-04 11:22:38 -0500 4559 4560 Minor changes in both: 4561 4562 The "code" file contains a workaround for the lack of "unistd.h" in 4563 Microsoft C++ version 7. 4564 4565 The "data" file contains a fixed "Link" for America/Shiprock. 4566 4567 4568 Release 94h - 1994-12-10 12:51:14 -0500 4569 4570 The files: 4571 4572 * incorporate the changes to "zdump" and "date" to make changes to 4573 the "TZ" environment variable permanent; 4574 4575 * incorporate the table changes by Paul Eggert; 4576 4577 * include (and document) support for universal time specifications in 4578 data files - but do not (yet) include use of this feature in the 4579 data files. 4580 4581 Think of this as "TZ Classic" - the software has been set up not to break if 4582 universal time shows up in its input, and data entries have been 4583 left as is so as not to break existing implementations. 4584 4585 4586 Release data94f - 1994-08-20 12:56:09 -0400 4587 4588 (with thanks!) the latest data updates from Paul Eggert 4589 4590 4591 Release data94e - 1994-06-04 13:13:53 -0400 4592 4593 [not summarized] 4594 4595 4596 Release code94g - 1994-05-05 12:14:07 -0400 4597 4598 fix missing "optind.c" and a reference to it in the Makefile 4599 4600 4601 Release code94f - 1994-05-05 13:00:33 -0000 4602 [tzcode94f.tar.gz is missing!] 4603 4604 changes to avoid overflow in difftime, as well as changes to cope 4605 with the 52/53 challenge in strftime 4606 4607 4608 Release code94e - 1994-03-30 23:32:59 -0500 4609 4610 change for the benefit of PCTS 4611 4612 4613 Release 94d - 1994-02-24 15:42:25 -0500 4614 4615 Avoid clashes with POSIX semantics for zones such as GMT+4. 4616 4617 Some other very minor housekeeping is also present. 4618 4619 4620 Release code94c - 1994-02-10 08:52:40 -0500 4621 4622 Fix bug where mkdirs was broken unless you compile with 4623 -fwritable-strings (which is generally losing to do). 4624 4625 4626 Release 94b - 1994-02-07 10:04:33 -0500 4627 4628 work by Paul Eggert who notes: 4629 4630 I found another book of time zone histories by E W Whitman; it's not 4631 as extensive as Shanks but has a few goodies of its own. I used it 4632 to update the tables. I also fixed some more as a result of 4633 correspondence with Adam David and Peter Ilieve, and move some stray 4634 links from 'europe' to 'backward'. I corrected some scanning errors 4635 in usno1989. 4636 4637 As far as the code goes, I fixed zic to allow years in the range 4638 INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900. 4639 And I cleaned up the zic documentation a little bit. 4640 4641 4642 Release data94a - 1994-02-03 08:58:54 -0500 4643 4644 It simply incorporates the recently announced leap second into the 4645 "leapseconds" file. 4646 4647 4648 Release 93g - 1993-11-22 17:28:27 -0500 4649 4650 Paul Eggert has provided a good deal of historic information (based 4651 on Shanks), and there are some code changes to deal with the buglets 4652 that crawled out in dealing with the new information. 4653 4654 4655 Release 93f - 1993-10-15 12:27:46 -0400 4656 4657 Paul Eggert's changes 4658 4659 4660 Release 93e - 1993-09-05 21:21:44 -0400 4661 4662 This has updated data for Israel, England, and Kwajalein. There's 4663 also an update to "zdump" to cope with Kwajalein's 24-hour jump. 4664 Thanks to Paul Eggert and Peter Ilieve for the changes. 4665 4666 4667 Release 93d - 1993-06-17 23:34:17 -0400 4668 4669 new fix and new data on Israel 4670 4671 4672 Release 93c - 1993-06-06 19:31:55 -0400 4673 4674 [not summarized] 4675 4676 4677 Release 93b - 1993-02-02 14:53:58 -0500 4678 4679 updated "leapseconds" file 4680 4681 4682 Release 93 - 1993-01-08 07:01:06 -0500 4683 4684 At kre's suggestion, the package has been split in two - a code piece 4685 (which also includes documentation) that's only of use to folks who 4686 want to recompile things and a data piece useful to anyone who can 4687 run "zic". 4688 4689 The new version has a few changes to the data files, a few 4690 portability changes, and an off-by-one fix (with thanks to 4691 Tom Karzes at deshaw.com for providing a description and a 4692 solution). 4693 4694 4695 Release 92c - 1992-11-21 17:35:36 -0000 4696 [tz92c.tar.Z is missing!] 4697 4698 The fallout from the latest round of DST transitions. 4699 4700 There are changes for Portugal, Saskatchewan, and "Pacific-New"; 4701 there's also a change to "zic.c" that makes it portable to more systems. 4702 4703 4704 Release 92 - 1992-04-25 18:17:03 -0000 4705 [tz92.tar.Z is missing!] 4706 4707 By popular demand (well, at any rate, following a request by kre at munnari) 4708 4709 4710 The 1989 update of the time zone package featured: 4711 4712 * POSIXization (including interpretation of POSIX-style TZ environment 4713 variables, provided by Guy Harris), 4714 * ANSIfication (including versions of "mktime" and "difftime"), 4715 * SVIDulation (an "altzone" variable) 4716 * MACHination (the "gtime" function) 4717 * corrections to some time zone data (including corrections to the rules 4718 for Great Britain and New Zealand) 4719 * reference data from the United States Naval Observatory for folks who 4720 want to do additional time zones 4721 * and the 1989 data for Saudi Arabia. 4722 4723 (Since this code will be treated as "part of the implementation" in some 4724 places and as "part of the application" in others, there's no good way to 4725 name functions, such as timegm, that are not part of the proposed ANSI C 4726 standard; such functions have kept their old, underscore-free names in this 4727 update.) 4728 4729 And the "dysize" function has disappeared; it was present to allow 4730 compilation of the "date" command on old BSD systems, and a version of "date" 4731 is now provided in the package. The "date" command is not created when you 4732 "make all" since it may lack options provided by the version distributed with 4733 your operating system, or may not interact with the system in the same way 4734 the native version does. 4735 4736 Since POSIX frowns on correct leap second handling, the default behavior of 4737 the "zic" command (in the absence of a "-L" option) has been changed to omit 4738 leap second information from its output files. 4739 4740 4741 ----- 4742 Notes 4743 4744 This file contains copies of the part of each release announcement 4745 that talks about the changes in that release. The text has been 4746 adapted and reformatted for the purposes of this file. 4747 4748 Traditionally a release R consists of a pair of tarball files, 4749 tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g., 4750 code2010a, data2012c) consist of just one or the other tarball, and a 4751 few (e.g., code2012c-data2012d) have tarballs with mixed version 4752 numbers. Recent releases also come in an experimental format 4753 consisting of a single tarball tzdb-R.tar.lz with extra data. 4754 4755 Release timestamps are taken from the release's commit (for newer, 4756 Git-based releases), from the newest file in the tarball (for older 4757 releases, where this info is available) or from the email announcing 4758 the release (if all else fails; these are marked with a time zone 4759 abbreviation of -0000 and an "is missing!" comment). 4760 4761 Earlier versions of the code and data were not announced on the tz 4762 list and are not summarized here. 4763 4764 This file is in the public domain. 4765 4766 Local Variables: 4767 coding: utf-8 4768 End: 4769
Indexes created Tue Sep 30 10:09:55 GMT 2025