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