NEWS revision 1.23
1 News for the tz database 2 3 Release 2018c - 2018-01-22 23:00:44 -0800 4 5 Briefly: 6 Revert Irish changes that relied on negative DST offsets. 7 8 Changes to tm_isdst 9 10 Revert the 2018a change to Europe/Dublin. As before, this change 11 does not affect UT offsets or abbreviations; it affects only 12 whether timestamps are considered to be standard time or 13 daylight-saving time, as expressed in the tm_isdst flag of C's 14 struct tm type. This reversion is intended to be a temporary 15 workaround for problems discovered with downstream uses of 16 releases 2018a and 2018b, which implemented Irish time by using 17 negative DST offsets in the Eire rules of the 'europe' file. 18 Although negative DST offsets have been part of tzcode for many 19 years and are supported by many platforms, they were not 20 documented before 2018a and ICU and OpenJDK do not currently 21 support them. A mechanism to export data to platforms lacking 22 support for negative DST is planned to be developed before the 23 change is reapplied. (Problems reported by Deborah Goldsmith and 24 Stephen Colebourne.) 25 26 Changes to past time stamps 27 28 Japanese DST transitions (1948-1951) were Sundays at 00:00, not 29 Saturdays or Sundays at 02:00. (Thanks to Takayuki Nikai.) 30 31 Changes to build procedure 32 33 The build procedure now works around mawk 1.3.3's lack of support 34 for character class expressions. (Problem reported by Ohyama.) 35 36 37 Release 2018b - 2018-01-17 23:24:48 -0800 38 39 Briefly: 40 Fix a packaging problem in tz2018a, which was missing 'pacificnew'. 41 42 Changes to build procedure 43 44 The distribution now contains the file 'pacificnew' again. 45 This file was inadvertantly omitted in the 2018a distribution. 46 (Problem reported by Matias Fonzo.) 47 48 49 Release 2018a - 2018-01-12 22:29:21 -0800 50 51 Briefly: 52 So Tom and Prncipe switched from +00 to +01. 53 Brazil's DST will now start on November's first Sunday. 54 Ireland's standard time is now in the summer, not the winter. 55 Use Debian-style installation locations, instead of 4.3BSD-style. 56 New zic option -t. 57 58 Changes to past and future time stamps 59 60 So Tom and Prncipe switched from +00 to +01 on 2018-01-01 at 61 01:00. (Thanks to Steffen Thorsen and Michael Deckers.) 62 63 Changes to future time stamps 64 65 Starting in 2018 southern Brazil will begin DST on November's 66 first Sunday instead of October's third Sunday. (Thanks to 67 Steffen Thorsen.) 68 69 Changes to past time stamps 70 71 A discrepancy of 4 s in timestamps before 1931 in South Sudan has 72 been corrected. The 'backzone' and 'zone.tab' files did not agree 73 with the 'africa' and 'zone1970.tab' files. (Problem reported by 74 Michael Deckers.) 75 76 The abbreviation invented for Bolivia Summer Time (1931-2) is now 77 BST instead of BOST, to be more consistent with the convention 78 used for Latvian Summer Time (1918-9) and for British Summer Time. 79 80 Changes to tm_isdst 81 82 Change Europe/Dublin so that it observes Irish Standard Time (UT 83 +01) in summer and GMT (as negative daylight-saving) in winter, 84 instead of observing standard time (GMT) in winter and Irish 85 Summer Time (UT +01) in summer. This change does not affect UT 86 offsets or abbreviations; it affects only whether timestamps are 87 considered to be standard time or daylight-saving time, as 88 expressed in the tm_isdst flag of C's struct tm type. 89 (Discrepancy noted by Derick Rethans.) 90 91 Changes to build procedure 92 93 The default installation locations have been changed to mostly 94 match Debian circa 2017, instead of being designed as an add-on to 95 4.3BSD circa 1986. This affects the Makefile macros TOPDIR, 96 TZDIR, MANDIR, and LIBDIR. New Makefile macros TZDEFAULT, USRDIR, 97 USRSHAREDIR, BINDIR, ZDUMPDIR, and ZICDIR let installers tailor 98 locations more precisely. (This responds to suggestions from 99 Brian Inglis and from Steve Summit.) 100 101 The default installation procedure no longer creates the 102 backward-compatibility link US/Pacific-New, which causes 103 confusion during user setup (e.g., see Debian bug 815200). 104 Use 'make BACKWARD="backward pacificnew"' to create the link 105 anyway, for now. Eventually we plan to remove the link entirely. 106 107 tzdata.zi now contains a version-number comment. 108 (Suggested by Tom Lane.) 109 110 The Makefile now quotes values like BACKWARD more carefully when 111 passing them to the shell. (Problem reported by Zefram.) 112 113 Builders no longer need to specify -DHAVE_SNPRINTF on platforms 114 that have snprintf and use pre-C99 compilers. (Problem reported 115 by Jon Skeet.) 116 117 Changes to code 118 119 zic has a new option -t FILE that specifies the location of the 120 file that determines local time when TZ is unset. The default for 121 this location can be configured via the new TZDEFAULT makefile 122 macro, which defaults to /etc/localtime. 123 124 Diagnostics and commentary now distinguish UT from UTC more 125 carefully; see theory.html for more information about UT vs UTC. 126 127 zic has been ported to GCC 8's -Wstringop-truncation option. 128 (Problem reported by Martin Sebor.) 129 130 Changes to documentation and commentary 131 132 The zic man page now documents the longstanding behavior that 133 times and years can be out of the usual range, with negative times 134 counting backwards from midnight and with year 0 preceding year 1. 135 (Problem reported by Michael Deckers.) 136 137 The theory.html file now mentions the POSIX limit of six chars 138 per abbreviation, and lists alphabetic abbreviations used. 139 140 The files tz-art.htm and tz-link.htm have been renamed to 141 tz-art.html and tz-link.html, respectively, for consistency with 142 other file names and to simplify web server configuration. 143 144 145 Release 2017c - 2017-10-20 14:49:34 -0700 146 147 Briefly: 148 Northern Cyprus switches from +03 to +02/+03 on 2017-10-29. 149 Fiji ends DST 2018-01-14, not 2018-01-21. 150 Namibia switches from +01/+02 to +02 on 2018-04-01. 151 Sudan switches from +03 to +02 on 2017-11-01. 152 Tonga likely switches from +13/+14 to +13 on 2017-11-05. 153 Turks & Caicos switches from -04 to -05/-04 on 2018-11-04. 154 A new file tzdata.zi now holds a small text copy of all data. 155 The zic input format has been regularized slightly. 156 157 Changes to future time stamps 158 159 Northern Cyprus has decided to resume EU rules starting 160 2017-10-29, thus reinstituting winter time. 161 162 Fiji ends DST 2018-01-14 instead of the 2018-01-21 previously 163 predicted. (Thanks to Dominic Fok.) Adjust future predictions 164 accordingly. 165 166 Namibia will switch from +01 with DST to +02 all year on 167 2017-09-03 at 02:00. This affects UT offsets starting 2018-04-01 168 at 02:00. (Thanks to Steffen Thorsen.) 169 170 Sudan will switch from +03 to +02 on 2017-11-01. (Thanks to Ahmed 171 Atyya and Yahia Abdalla.) South Sudan is not switching, so 172 Africa/Juba is no longer a link to Africa/Khartoum. 173 174 Tonga has likely ended its experiment with DST, and will not 175 adjust its clocks on 2017-11-05. Although Tonga has not announced 176 whether it will continue to observe DST, the IATA is assuming that 177 it will not. (Thanks to David Wade.) 178 179 Turks & Caicos will switch from -04 all year to -05 with US DST on 180 2018-03-11 at 03:00. This affects UT offsets starting 2018-11-04 181 at 02:00. (Thanks to Steffen Thorsen.) 182 183 Changes to past time stamps 184 185 Namibia switched from +02 to +01 on 1994-03-21, not 1994-04-03. 186 (Thanks to Arthur David Olson.) 187 188 Detroit did not observe DST in 1967. 189 190 Use railway time for Asia/Kolkata before 1941, by switching to 191 Madras local time (UT +052110) in 1870, then to IST (UT +0530) in 192 1906. Also, treat 1941-2's +0630 as DST, like 1942-5. 193 194 Europe/Dublin's 1946 and 1947 fallback transitions occurred at 195 02:00 standard time, not 02:00 DST. (Thanks to Michael Deckers.) 196 197 Pacific/Apia and Pacific/Pago_Pago switched from Antipodean to 198 American time in 1892, not 1879. (Thanks to Michael Deckers.) 199 200 Adjust the 1867 transition in Alaska to better reflect the 201 historical record, by changing it to occur on 1867-10-18 at 15:30 202 Sitka time rather than at the start of 1867-10-17 local time. 203 Although strictly speaking this is accurate only for Sitka, 204 the rest of Alaska's blanks need to be filled in somehow. 205 206 Fix off-by-one errors in UT offsets for Adak and Nome before 1867. 207 (Thanks to Michael Deckers.) 208 209 Add 7 s to the UT offset in Asia/Yangon before 1920. 210 211 Changes to zone names 212 213 Remove Canada/East-Saskatchewan from the 'backward' file, as it 214 exceeded the 14-character limit and was an unused misnomer anyway. 215 216 Changes to build procedure 217 218 To support applications that prefer to read time zone data in text 219 form, two zic input files tzdata.zi and leapseconds are now 220 installed by default. The commands 'zic tzdata.zi' and 'zic -L 221 leapseconds tzdata.zi' can reproduce the tzdata binary files 222 without and with leap seconds, respectively. To prevent these two 223 new files from being installed, use 'make TZDATA_TEXT=', and to 224 suppress leap seconds from the tzdata text installation, use 'make 225 TZDATA_TEXT=tzdata.zi'. 226 227 'make BACKWARD=' now suppresses backward-compatibility names 228 like 'US/Pacific' that are defined in the 'backward' and 229 'pacificnew' files. 230 231 'make check' now works on systems that lack a UTF-8 locale, 232 or that lack the nsgmls program. Set UTF8_LOCALE to configure 233 the name of a UTF-8 locale, if you have one. 234 235 Y2K runtime checks are no longer enabled by default. Add 236 -DDEPRECATE_TWO_DIGIT_YEARS to CFLAGS to enable them, instead of 237 adding -DNO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU 238 to disable them. (New name suggested by Brian Inglis.) 239 240 The build procedure for zdump now works on AIX 7.1. 241 (Problem reported by Kees Dekker.) 242 243 Changes to code 244 245 zic and the reference runtime now reject multiple leap seconds 246 within 28 days of each other, or leap seconds before the Epoch. 247 As a result, support for double leap seconds, which was 248 obsolescent and undocumented, has been removed. Double leap 249 seconds were an error in the C89 standard; they have never existed 250 in civil timekeeping. (Thanks to Robert Elz and Bradley White for 251 noticing glitches in the code that uncovered this problem.) 252 253 zic now warns about use of the obsolescent and undocumented -y 254 option, and about use of the obsolescent TYPE field of Rule lines. 255 256 zic now allows unambiguous abbreviations like "Sa" and "Su" for 257 weekdays; formerly it rejected them due to a bug. Conversely, zic 258 no longer considers non-prefixes to be abbreviations; for example, 259 it no longer accepts "lF" as an abbreviation for "lastFriday". 260 Also, zic warns about the undocumented usage with a "last-" 261 prefix, e.g., "last-Fri". 262 263 Similarly, zic now accepts the unambiguous abbreviation "L" for 264 "Link" in ordinary context and for "Leap" in leap-second context. 265 Conversely, zic no longer accepts non-prefixes such as "La" as 266 abbreviations for words like "Leap". 267 268 zic no longer accepts leap second lines in ordinary input, or 269 ordinary lines in leap second input. Formerly, zic sometimes 270 warned about this undocumented usage and handled it incorrectly. 271 272 The new macro HAVE_TZNAME governs whether the tzname external 273 variable is exported, instead of USG_COMPAT. USG_COMPAT now 274 governs only the external variables "timezone" and "daylight". 275 This change is needed because the three variables are not in the 276 same category: although POSIX requires tzname, it specifies the 277 other two variables as optional. Also, USG_COMPAT is now 1 or 0: 278 if not defined, the code attempts to guess it from other macros. 279 280 localtime.c and difftime.c no longer require stdio.h, and .c files 281 other than zic.c no longer require sys/wait.h. 282 283 zdump.c no longer assumes snprintf. (Reported by Jonathan Leffler.) 284 285 Calculation of time_t extrema works around a bug in GCC 4.8.4 286 (Reported by Stan Shebs and Joseph Myers.) 287 288 zic.c no longer mistranslates formats of line numbers in non-English 289 locales. (Problem reported by Benno Schulenberg.) 290 291 Several minor changes have been made to the code to make it a 292 bit easier to port to MS-Windows and Solaris. (Thanks to Kees 293 Dekker for reporting the problems.) 294 295 Changes to documentation and commentary 296 297 The two new files 'theory.html' and 'calendars' contain the 298 contents of the removed file 'Theory'. The goal is to document 299 tzdb theory more accessibly. 300 301 The zic man page now documents abbreviation rules. 302 303 tz-link.htm now covers how to apply tzdata changes to clients. 304 (Thanks to Jorge Fbregas for the AIX link.) It also mentions MySQL. 305 306 The leap-seconds.list URL has been updated to something that is 307 more reliable for tzdb. (Thanks to Tim Parenti and Brian Inglis.) 308 309 Release 2017b - 2017-03-17 07:30:38 -0700 310 311 Briefly: Haiti has resumed DST. 312 313 Changes to past and future time stamps 314 315 Haiti resumed observance of DST in 2017. (Thanks to Steffen Thorsen.) 316 317 Changes to past time stamps 318 319 Liberia changed from -004430 to +00 on 1972-01-07, not 1972-05-01. 320 321 Use "MMT" to abbreviate Liberia's time zone before 1972, as "-004430" 322 is one byte over the POSIX limit. (Problem reported by Derick Rethans.) 323 324 Changes to code 325 326 The reference localtime implementation now falls back on the 327 current US daylight-saving transition rules rather than the 328 1987-2006 rules. This fallback occurs only when (1) the TZ 329 environment variable's value has a name like "AST4ADT" that asks 330 for daylight saving time but does not specify the rules, (2) there 331 is no file by that name, and (3) the TZDEFRULES file cannot be 332 loaded. (Thanks to Tom Lane.) 333 334 335 Release 2017a - 2017-02-28 00:05:36 -0800 336 337 Briefly: Southern Chile moves from -04/-03 to -03, and Mongolia 338 discontinues DST. 339 340 Changes to future time stamps 341 342 Mongolia no longer observes DST. (Thanks to Ganbold Tsagaankhuu.) 343 344 Chile's Region of Magallanes moves from -04/-03 to -03 year-round. 345 Its clocks diverge from America/Santiago starting 2017-05-13 at 346 23:00, hiving off a new zone America/Punta_Arenas. Although the 347 Chilean government says this change expires in May 2019, for now 348 assume it's permanent. (Thanks to Juan Correa and Deborah 349 Goldsmith.) This also affects Antarctica/Palmer. 350 351 Changes to past time stamps 352 353 Fix many entries for historical time stamps for Europe/Madrid 354 before 1979, to agree with tables compiled by Pere Planesas of the 355 National Astronomical Observatory of Spain. As a side effect, 356 this changes some time stamps for Africa/Ceuta before 1929, which 357 are probably guesswork anyway. (Thanks to Steve Allen and 358 Pierpaolo Bernardi for the heads-ups, and to Michael Deckers for 359 correcting the 1901 transition.) 360 361 Ecuador observed DST from 1992-11-28 to 1993-02-05. 362 (Thanks to Alois Treindl.) 363 364 Asia/Atyrau and Asia/Oral were at +03 (not +04) before 1930-06-21. 365 (Thanks to Stepan Golosunov.) 366 367 Changes to past and future time zone abbreviations 368 369 Switch to numeric time zone abbreviations for South America, as 370 part of the ongoing project of removing invented abbreviations. 371 This avoids the need to invent an abbreviation for the new Chilean 372 new zone. Similarly, switch from invented to numeric time zone 373 abbreviations for Afghanistan, American Samoa, the Azores, 374 Bangladesh, Bhutan, the British Indian Ocean Territory, Brunei, 375 Cape Verde, Chatham Is, Christmas I, Cocos (Keeling) Is, Cook Is, 376 Dubai, East Timor, Eucla, Fiji, French Polynesia, Greenland, 377 Indochina, Iran, Iraq, Kiribati, Lord Howe, Macquarie, Malaysia, 378 the Maldives, Marshall Is, Mauritius, Micronesia, Mongolia, 379 Myanmar, Nauru, Nepal, New Caledonia, Niue, Norfolk I, Palau, 380 Papua New Guinea, the Philippines, Pitcairn, Qatar, Runion, St 381 Pierre & Miquelon, Samoa, Saudi Arabia, Seychelles, Singapore, 382 Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, Wallis & Futuna, and 383 Xinjiang; for 20-minute daylight saving time in Ghana before 1943; 384 for half-hour daylight saving time in Belize before 1944 and in 385 the Dominican Republic before 1975; and for Canary Islands before 386 1946, for Guinea-Bissau before 1975, for Iceland before 1969, for 387 Indian Summer Time before 1942, for Indonesia before around 1964, 388 for Kenya before 1960, for Liberia before 1973, for Madeira before 389 1967, for Namibia before 1943, for the Netherlands in 1937-9, for 390 Pakistan before 1971, for Western Sahara before 1977, and for 391 Zaporozhye in 1880-1924. 392 393 For Alaska time from 1900 through 1967, instead of "CAT" use the 394 abbreviation "AST", the abbreviation commonly used at the time 395 (Atlantic Standard Time had not been standardized yet). Use "AWT" 396 and "APT" instead of the invented abbreviations "CAWT" and "CAPT". 397 398 Use "CST" and "CDT" instead of invented abbreviations for Macau 399 before 1999 and Taiwan before 1938, and use "JST" instead of the 400 invented abbreviation "JCST" for Japan and Korea before 1938. 401 402 Change to database entry category 403 404 Move the Pacific/Johnston link from 'australasia' to 'backward', 405 since Johnston is now uninhabited. 406 407 Changes to code 408 409 zic no longer mishandles some transitions in January 2038 when it 410 attempts to work around Qt bug 53071. This fixes a bug affecting 411 Pacific/Tongatapu that was introduced in zic 2016e. localtime.c 412 now contains a workaround, useful when loading a file generated by 413 a buggy zic. (Problem and localtime.c fix reported by Bradley 414 White.) 415 416 zdump -i now outputs non-hour numeric time zone abbreviations 417 without a colon, e.g., "+0530" rather than "+05:30". This agrees 418 with zic %z and with common practice, and simplifies auditing of 419 zdump output. 420 421 zdump is now buildable again with -DUSE_LTZ=0. 422 (Problem reported by Joseph Myers.) 423 424 zdump.c now always includes private.h, to avoid code duplication 425 with private.h. (Problem reported by Kees Dekker.) 426 427 localtime.c no longer mishandles early or late timestamps 428 when TZ is set to a POSIX-style string that specifies DST. 429 (Problem reported by Kees Dekker.) 430 431 date and strftime now cause %z to generate "-0000" instead of 432 "+0000" when the UT offset is zero and the time zone abbreviation 433 begins with "-". 434 435 Changes to documentation and commentary 436 437 The 'Theory' file now better documents choice of historical time 438 zone abbreviations. (Problems reported by Michael Deckers.) 439 440 tz-link.htm now covers leap smearing, which is popular in clouds. 441 442 443 Release 2016j - 2016-11-22 23:17:13 -0800 444 445 Briefly: Saratov, Russia moves from +03 to +04 on 2016-12-04. 446 447 Changes to future time stamps 448 449 Saratov, Russia switches from +03 to +04 on 2016-12-04 at 02:00. 450 This hives off a new zone Europe/Saratov from Europe/Volgograd. 451 (Thanks to Yuri Konotopov and Stepan Golosunov.) 452 453 Changes to past time stamps 454 455 The new zone Asia/Atyrau for Atyra Region, Kazakhstan, is like 456 Asia/Aqtau except it switched from +05/+06 to +04/+05 in spring 457 1999, not fall 1994. (Thanks to Stepan Golosunov.) 458 459 Changes to past time zone abbreviations 460 461 Asia/Gaza and Asia/Hebron now use "EEST", not "EET", to denote 462 summer time before 1948. The old use of "EET" was a typo. 463 464 Changes to code 465 466 zic no longer mishandles file systems that lack hard links, fixing 467 bugs introduced in 2016g. (Problems reported by Tom Lane.) 468 Also, when the destination already contains symbolic links, zic 469 should now work better on systems where the 'link' system call 470 does not follow symbolic links. 471 472 Changes to documentation and commentary 473 474 tz-link.htm now documents the relationship between release version 475 numbers and development-repository commit tags. (Suggested by 476 Paul Koning.) 477 478 The 'Theory' file now documents UT. 479 480 iso3166.tab now accents "Curaao", and commentary now mentions 481 the names "Cabo Verde" and "Czechia". (Thanks to Ji Boh.) 482 483 484 Release 2016i - 2016-11-01 23:19:52 -0700 485 486 Briefly: Cyprus split into two time zones on 2016-10-30, and Tonga 487 reintroduces DST on 2016-11-06. 488 489 Changes to future time stamps 490 491 Pacific/Tongatapu begins DST on 2016-11-06 at 02:00, ending on 492 2017-01-15 at 03:00. Assume future observances in Tonga will be 493 from the first Sunday in November through the third Sunday in 494 January, like Fiji. (Thanks to Pulu Anau.) Switch to numeric 495 time zone abbreviations for this zone. 496 497 Changes to past and future time stamps 498 499 Northern Cyprus is now +03 year round, causing a split in Cyprus 500 time zones starting 2016-10-30 at 04:00. This creates a zone 501 Asia/Famagusta. (Thanks to Even Scharning and Matt Johnson.) 502 503 Antarctica/Casey switched from +08 to +11 on 2016-10-22. 504 (Thanks to Steffen Thorsen.) 505 506 Changes to past time stamps 507 508 Several corrections were made for pre-1975 time stamps in Italy. 509 These affect Europe/Malta, Europe/Rome, Europe/San_Marino, and 510 Europe/Vatican. 511 512 First, the 1893-11-01 00:00 transition in Italy used the new UT 513 offset (+01), not the old (+00:49:56). (Thanks to Michael 514 Deckers.) 515 516 Second, rules for daylight saving in Italy were changed to agree 517 with Italy's National Institute of Metrological Research (INRiM) 518 except for 1944, as follows (thanks to Pierpaolo Bernardi, Brian 519 Inglis, and Michael Deckers): 520 521 The 1916-06-03 transition was at 24:00, not 00:00. 522 523 The 1916-10-01, 1919-10-05, and 1920-09-19 transitions were at 524 00:00, not 01:00. 525 526 The 1917-09-30 and 1918-10-06 transitions were at 24:00, not 527 01:00. 528 529 The 1944-09-17 transition was at 03:00, not 01:00. This 530 particular change is taken from Italian law as INRiM's table, 531 (which says 02:00) appears to have a typo here. Also, keep the 532 1944-04-03 transition for Europe/Rome, as Rome was controlled by 533 Germany then. 534 535 The 1967-1970 and 1972-1974 fallback transitions were at 01:00, 536 not 00:00. 537 538 Changes to code 539 540 The code should now be buildable on AmigaOS merely by setting the 541 appropriate Makefile variables. (From a patch by Carsten Larsen.) 542 543 544 Release 2016h - 2016-10-19 23:17:57 -0700 545 546 Changes to future time stamps 547 548 Asia/Gaza and Asia/Hebron end DST on 2016-10-29 at 01:00, not 549 2016-10-21 at 00:00. (Thanks to Sharef Mustafa.) Predict that 550 future fall transitions will be on the last Saturday of October 551 at 01:00, which is consistent with predicted spring transitions 552 on the last Saturday of March. (Thanks to Tim Parenti.) 553 554 Changes to past time stamps 555 556 In Turkey, transitions in 1986-1990 were at 01:00 standard time 557 not at 02:00, and the spring 1994 transition was on March 20, not 558 March 27. (Thanks to Kvan Yazan.) 559 560 Changes to past and future time zone abbreviations 561 562 Asia/Colombo now uses numeric time zone abbreviations like "+0530" 563 instead of alphabetic ones like "IST" and "LKT". Various 564 English-language sources use "IST", "LKT" and "SLST", with no 565 working consensus. (Usage of "SLST" mentioned by Sadika 566 Sumanapala.) 567 568 Changes to code 569 570 zic no longer mishandles relativizing file names when creating 571 symbolic links like /etc/localtime, when these symbolic links 572 are outside the usual directory hierarchy. This fixes a bug 573 introduced in 2016g. (Problem reported by Andreas Stieger.) 574 575 Changes to build procedure 576 577 New rules 'traditional_tarballs' and 'traditional_signatures' for 578 building just the traditional-format distribution. (Requested by 579 Deborah Goldsmith.) 580 581 The file 'version' is now put into the tzdata tarball too. 582 (Requested by Howard Hinnant.) 583 584 Changes to documentation and commentary 585 586 The 'Theory' file now has a section on interface stability. 587 (Requested by Paul Koning.) It also mentions features like 588 tm_zone and localtime_rz that have long been supported by the 589 reference code. 590 591 tz-link.htm has improved coverage of time zone boundaries suitable 592 for geolocation. (Thanks to heads-ups from Evan Siroky and Matt 593 Johnson.) 594 595 The US commentary now mentions Allen and the "day of two noons". 596 597 The Fiji commentary mentions the government's 2016-10-03 press 598 release. (Thanks to Raymond Kumar.) 599 600 601 Release 2016g - 2016-09-13 08:56:38 -0700 602 603 Changes to future time stamps 604 605 Turkey switched from EET/EEST (+02/+03) to permanent +03, 606 effective 2016-09-07. (Thanks to Burak AYDIN.) Use "+03" rather 607 than an invented abbreviation for the new time. 608 609 New leap second 2016-12-31 23:59:60 UTC as per IERS Bulletin C 52. 610 (Thanks to Tim Parenti.) 611 612 Changes to past time stamps 613 614 For America/Los_Angeles, spring-forward transition times have been 615 corrected from 02:00 to 02:01 in 1948, and from 02:00 to 01:00 in 616 1950-1966. 617 618 For zones using Soviet time on 1919-07-01, transitions to UT-based 619 time were at 00:00 UT, not at 02:00 local time. The affected 620 zones are Europe/Kirov, Europe/Moscow, Europe/Samara, and 621 Europe/Ulyanovsk. (Thanks to Alexander Belopolsky.) 622 623 Changes to past and future time zone abbreviations 624 625 The Factory zone now uses the time zone abbreviation -00 instead 626 of a long English-language string, as -00 is now the normal way to 627 represent an undefined time zone. 628 629 Several zones in Antarctica and the former Soviet Union, along 630 with zones intended for ships at sea that cannot use POSIX TZ 631 strings, now use numeric time zone abbreviations instead of 632 invented or obsolete alphanumeric abbreviations. The affected 633 zones are Antarctica/Casey, Antarctica/Davis, 634 Antarctica/DumontDUrville, Antarctica/Mawson, Antarctica/Rothera, 635 Antarctica/Syowa, Antarctica/Troll, Antarctica/Vostok, 636 Asia/Anadyr, Asia/Ashgabat, Asia/Baku, Asia/Bishkek, Asia/Chita, 637 Asia/Dushanbe, Asia/Irkutsk, Asia/Kamchatka, Asia/Khandyga, 638 Asia/Krasnoyarsk, Asia/Magadan, Asia/Omsk, Asia/Sakhalin, 639 Asia/Samarkand, Asia/Srednekolymsk, Asia/Tashkent, Asia/Tbilisi, 640 Asia/Ust-Nera, Asia/Vladivostok, Asia/Yakutsk, Asia/Yekaterinburg, 641 Asia/Yerevan, Etc/GMT-14, Etc/GMT-13, Etc/GMT-12, Etc/GMT-11, 642 Etc/GMT-10, Etc/GMT-9, Etc/GMT-8, Etc/GMT-7, Etc/GMT-6, Etc/GMT-5, 643 Etc/GMT-4, Etc/GMT-3, Etc/GMT-2, Etc/GMT-1, Etc/GMT+1, Etc/GMT+2, 644 Etc/GMT+3, Etc/GMT+4, Etc/GMT+5, Etc/GMT+6, Etc/GMT+7, Etc/GMT+8, 645 Etc/GMT+9, Etc/GMT+10, Etc/GMT+11, Etc/GMT+12, Europe/Kaliningrad, 646 Europe/Minsk, Europe/Samara, Europe/Volgograd, and 647 Indian/Kerguelen. For Europe/Moscow the invented abbreviation MSM 648 was replaced by +05, whereas MSK and MSD were kept as they are not 649 our invention and are widely used. 650 651 Changes to zone names 652 653 Rename Asia/Rangoon to Asia/Yangon, with a backward compatibility link. 654 (Thanks to David Massoud.) 655 656 Changes to code 657 658 zic no longer generates binary files containing POSIX TZ-like 659 strings that disagree with the local time type after the last 660 explicit transition in the data. This fixes a bug with 661 Africa/Casablanca and Africa/El_Aaiun in some year-2037 time 662 stamps on the reference platform. (Thanks to Alexander Belopolsky 663 for reporting the bug and suggesting a way forward.) 664 665 If the installed localtime and/or posixrules files are symbolic 666 links, zic now keeps them symbolic links when updating them, for 667 compatibility with platforms like OpenSUSE where other programs 668 configure these files as symlinks. 669 670 zic now avoids hard linking to symbolic links, avoids some 671 unnecessary mkdir and stat system calls, and uses shorter file 672 names internally. 673 674 zdump has a new -i option to generate transitions in a 675 more-compact but still human-readable format. This option is 676 experimental, and the output format may change in future versions. 677 (Thanks to Jon Skeet for suggesting that an option was needed, 678 and thanks to Tim Parenti and Chris Rovick for further comments.) 679 680 Changes to build procedure 681 682 An experimental distribution format is available, in addition 683 to the traditional format which will continue to be distributed. 684 The new format is a tarball tzdb-VERSION.tar.lz with signature 685 file tzdb-VERSION.tar.lz.asc. It unpacks to a top-level directory 686 tzdb-VERSION containing the code and data of the traditional 687 two-tarball format, along with extra data that may be useful. 688 (Thanks to Antonio Diaz Diaz, Oscar van Vlijmen, and many others 689 for comments about the experimental format.) 690 691 The release version number is now more accurate in the usual case 692 where releases are built from a Git repository. For example, if 693 23 commits and some working-file changes have been made since 694 release 2016g, the version number is now something like 695 '2016g-23-g50556e3-dirty' instead of the misleading '2016g'. 696 Tagged releases use the same version number format as before, 697 e.g., '2016g'. To support the more-accurate version number, its 698 specification has moved from a line in the Makefile to a new 699 source file 'version'. 700 701 The experimental distribution contains a file to2050.tzs that 702 contains what should be the output of 'zdump -i -c 2050' on 703 primary zones. If this file is available, 'make check' now checks 704 that zdump generates this output. 705 706 'make check_web' now works on Fedora-like distributions. 707 708 Changes to documentation and commentary 709 710 tzfile.5 now documents the new restriction on POSIX TZ-like 711 strings that is now implemented by zic. 712 713 Comments now cite URLs for some 1917-1921 Russian DST decrees. 714 (Thanks to Alexander Belopolsky.) 715 716 tz-link.htm mentions JuliaTime (thanks to Curtis Vogt) and Time4J 717 (thanks to Meno Hochschild) and ThreeTen-Extra, and its 718 description of Java 8 has been brought up to date (thanks to 719 Stephen Colebourne). Its description of local time on Mars has 720 been updated to match current practice, and URLs have been updated 721 and some obsolete ones removed. 722 723 724 Release 2016f - 2016-07-05 16:26:51 +0200 725 726 Changes affecting future time stamps 727 728 The Egyptian government changed its mind on short notice, and 729 Africa/Cairo will not introduce DST starting 2016-07-07 after all. 730 (Thanks to Mina Samuel.) 731 732 Asia/Novosibirsk switches from +06 to +07 on 2016-07-24 at 02:00. 733 (Thanks to Stepan Golosunov.) 734 735 Changes to past and future time stamps 736 737 Asia/Novokuznetsk and Asia/Novosibirsk now use numeric time zone 738 abbreviations instead of invented ones. 739 740 Changes affecting past time stamps 741 742 Europe/Minsk's 1992-03-29 spring-forward transition was at 02:00 not 00:00. 743 (Thanks to Stepan Golosunov.) 744 745 746 Release 2016e - 2016-06-14 08:46:16 -0700 747 748 Changes affecting future time stamps 749 750 Africa/Cairo observes DST in 2016 from July 7 to the end of October. 751 Guess October 27 and 24:00 transitions. (Thanks to Steffen Thorsen.) 752 For future years, guess April's last Thursday to October's last 753 Thursday except for Ramadan. 754 755 Changes affecting past time stamps 756 757 Locations while uninhabited now use '-00', not 'zzz', as a 758 placeholder time zone abbreviation. This is inspired by Internet 759 RFC 3339 and is more consistent with numeric time zone 760 abbreviations already used elsewhere. The change affects several 761 arctic and antarctic locations, e.g., America/Cambridge_Bay before 762 1920 and Antarctica/Troll before 2005. 763 764 Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was 765 at 03:00, not 23:00 the previous day. (Thanks to Michael Deckers.) 766 767 Changes to code 768 769 zic now outputs a dummy transition at time 2**31 - 1 in zones 770 whose POSIX-style TZ strings contain a '<'. This mostly works 771 around Qt bug 53071 <https://bugreports.qt.io/browse/QTBUG-53071>. 772 (Thanks to Zhanibek Adilbekov for reporting the Qt bug.) 773 774 Changes affecting documentation and commentary 775 776 tz-link.htm says why governments should give plenty of notice for 777 time zone or DST changes, and refers to Matt Johnson's blog post. 778 779 tz-link.htm mentions Tzdata for Elixir. (Thanks to Matt Johnson.) 780 781 782 Release 2016d - 2016-04-17 22:50:29 -0700 783 784 Changes affecting future time stamps 785 786 America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30. 787 (Thanks to Alexander Krivenyshev for the heads-up.) 788 789 Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00. 790 (Thanks to Alexander Krivenyshev and Matt Johnson.) 791 792 New zone Asia/Tomsk, split off from Asia/Novosibirsk. It covers 793 Tomsk Oblast, Russia, which switches from +06 to +07 on 2016-05-29 794 at 02:00. (Thanks to Stepan Golosunov.) 795 796 Changes affecting past time stamps 797 798 New zone Europe/Kirov, split off from Europe/Volgograd. It covers 799 Kirov Oblast, Russia, which switched from +04/+05 to +03/+04 on 800 1989-03-26 at 02:00, roughly a year after Europe/Volgograd made 801 the same change. (Thanks to Stepan Golosunov.) 802 803 Russia and nearby locations had daylight-saving transitions on 804 1992-03-29 at 02:00 and 1992-09-27 at 03:00, instead of on 805 1992-03-28 at 23:00 and 1992-09-26 at 23:00. (Thanks to Stepan 806 Golosunov.) 807 808 Many corrections to historical time in Kazakhstan from 1991 809 through 2005. (Thanks to Stepan Golosunov.) Replace Kazakhstan's 810 invented time zone abbreviations with numeric abbreviations. 811 812 Changes to commentary 813 814 Mention Internet RFCs 7808 (TZDIST) and 7809 (CalDAV time zone references). 815 816 817 Release 2016c - 2016-03-23 00:51:27 -0700 818 819 Changes affecting future time stamps 820 821 Azerbaijan no longer observes DST. (Thanks to Steffen Thorsen.) 822 823 Chile reverts from permanent to seasonal DST. (Thanks to Juan 824 Correa for the heads-up, and to Tim Parenti for corrections.) 825 Guess that future transitions are August's and May's second 826 Saturdays at 24:00 mainland time. Also, call the period from 827 2014-09-07 through 2016-05-14 daylight saving time instead of 828 standard time, as that seems more appropriate now. 829 830 Changes affecting past time stamps 831 832 Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to 833 +02/+03 on 1989-03-26, not 1991-03-31. Europe/Volgograd changed 834 from +04/+05 to +03/+04 on 1988-03-27, not 1989-03-26. 835 (Thanks to Stepan Golosunov.) 836 837 Changes to commentary 838 839 Several updates and URLs for historical and proposed Russian changes. 840 (Thanks to Stepan Golosunov, Matt Johnson, and Alexander Krivenyshev.) 841 842 843 Release 2016b - 2016-03-12 17:30:14 -0800 844 845 Compatibility note 846 847 Starting with release 2016b, some data entries cause zic implementations 848 derived from tz releases 2005j through 2015e to issue warnings like 849 "time zone abbreviation differs from POSIX standard (+03)". 850 These warnings should not otherwise affect zic's output and can safely be 851 ignored on today's platforms, as the warnings refer to a restriction in 852 POSIX.1-1988 that was removed in POSIX.1-2001. One way to suppress the 853 warnings is to upgrade to zic derived from tz releases 2015f and later. 854 855 Changes affecting future time stamps 856 857 New zones Europe/Astrakhan and Europe/Ulyanovsk for Astrakhan and 858 Ulyanovsk Oblasts, Russia, both of which will switch from +03 to +04 on 859 2016-03-27 at 02:00 local time. They need distinct zones since their 860 post-1970 histories disagree. New zone Asia/Barnaul for Altai Krai and 861 Altai Republic, Russia, which will switch from +06 to +07 on the same date 862 and local time. The Astrakhan change is already official; the others have 863 passed the first reading in the State Duma and are extremely likely. 864 Also, Asia/Sakhalin moves from +10 to +11 on 2016-03-27 at 02:00. 865 (Thanks to Alexander Krivenyshev for the heads-up, and to Matt Johnson 866 and Stepan Golosunov for followup.) 867 868 As a trial of a new system that needs less information to be made up, 869 the new zones use numeric time zone abbreviations like "+04" 870 instead of invented abbreviations like "ASTT". 871 872 Haiti will not observe DST in 2016. (Thanks to Jean Antoine via 873 Steffen Thorsen.) 874 875 Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00. 876 (Thanks to Hannah Kreitem.) Guess future transitions will be March's last 877 Saturday at 01:00, not March's last Friday at 24:00. 878 879 Changes affecting past time stamps 880 881 Europe/Chisinau observed DST during 1990, and switched from +04 to 882 +03 at 1990-05-06 02:00, instead of switching from +03 to +02. 883 (Thanks to Stepan Golosunov.) 884 885 1991 abbreviations in Europe/Samara should be SAMT/SAMST, not 886 KUYT/KUYST. (Thanks to Stepan Golosunov.) 887 888 Changes to code 889 890 tzselect's diagnostics and checking, and checktab.awk's checking, 891 have been improved. (Thanks to J William Piggott.) 892 893 tzcode now builds under MinGW. (Thanks to Ian Abbott and Esben Haabendal.) 894 895 tzselect now tests Julian-date TZ settings more accurately. 896 (Thanks to J William Piggott.) 897 898 Changes to commentary 899 900 Comments in zone tables have been improved. (Thanks to J William Piggott.) 901 902 tzselect again limits its menu comments so that menus fit on a 903 24x80 alphanumeric display. 904 905 A new web page tz-how-to.html. (Thanks to Bill Seymour.) 906 907 In the Theory file, the description of possible time zone abbreviations in 908 tzdata has been cleaned up, as the old description was unclear and 909 inconsistent. (Thanks to Alain Mouette for reporting the problem.) 910 911 912 Release 2016a - 2016-01-26 23:28:02 -0800 913 914 Changes affecting future time stamps 915 916 America/Cayman will not observe daylight saving this year after all. 917 Revert our guess that it would. (Thanks to Matt Johnson.) 918 919 Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00. 920 (Thanks to Alexander Krivenyshev.) 921 922 Asia/Tehran now has DST predictions for the year 2038 and later, 923 to be March 21 00:00 to September 21 00:00. This is likely better 924 than predicting no DST, albeit off by a day every now and then. 925 926 Changes affecting past and future time stamps 927 928 America/Metlakatla switched from PST all year to AKST/AKDT on 929 2015-11-01 at 02:00. (Thanks to Steffen Thorsen.) 930 931 America/Santa_Isabel has been removed, and replaced with a 932 backward compatibility link to America/Tijuana. Its contents were 933 apparently based on a misreading of Mexican legislation. 934 935 Changes affecting past time stamps 936 937 Asia/Karachi's two transition times in 2002 were off by a minute. 938 (Thanks to Matt Johnson.) 939 940 Changes affecting build procedure 941 942 An installer can now combine leap seconds with use of the backzone file, 943 e.g., with 'make PACKRATDATA=backzone REDO=posix_right zones'. 944 The old 'make posix_packrat' rule is now marked as obsolescent. 945 (Thanks to Ian Abbott for an initial implementation.) 946 947 Changes affecting documentation and commentary 948 949 A new file LICENSE makes it easier to see that the code and data 950 are mostly public-domain. (Thanks to James Knight.) The three 951 non-public-domain files now use the current (3-clause) BSD license 952 instead of older versions of that license. 953 954 tz-link.htm mentions the BDE library (thanks to Andrew Paprocki), 955 CCTZ (thanks to Tim Parenti), TimeJones.com, and has a new section 956 on editing tz source files (with a mention of Sublime zoneinfo, 957 thanks to Gilmore Davidson). 958 959 The Theory and asia files now mention the 2015 book "The Global 960 Transformation of Time, 1870-1950", and cite a couple of reviews. 961 962 The America/Chicago entry now documents the informal use of US 963 central time in Fort Pierre, South Dakota. (Thanks to Rick 964 McDermid, Matt Johnson, and Steve Jones.) 965 966 967 Release 2015g - 2015-10-01 00:39:51 -0700 968 969 Changes affecting future time stamps 970 971 Turkey's 2015 fall-back transition is scheduled for Nov. 8, not Oct. 25. 972 (Thanks to Fatih.) 973 974 Norfolk moves from +1130 to +1100 on 2015-10-04 at 02:00 local time. 975 (Thanks to Alexander Krivenyshev.) 976 977 Fiji's 2016 fall-back transition is scheduled for January 17, not 24. 978 (Thanks to Ken Rylander.) 979 980 Fort Nelson, British Columbia will not fall back on 2015-11-01. It has 981 effectively been on MST (-0700) since it advanced its clocks on 2015-03-08. 982 New zone America/Fort_Nelson. (Thanks to Matt Johnson.) 983 984 Changes affecting past time stamps 985 986 Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00. 987 988 Changes affecting code 989 990 localtime no longer mishandles America/Anchorage after 2037. 991 (Thanks to Bradley White for reporting the bug.) 992 993 On hosts with signed 32-bit time_t, localtime no longer mishandles 994 Pacific/Fiji after 2038-01-16 14:00 UTC. 995 996 The localtime module allows the variables 'timezone', 'daylight', 997 and 'altzone' to be in common storage shared with other modules, 998 and declares them in case the system <time.h> does not. 999 (Problems reported by Kees Dekker.) 1000 1001 On platforms with tm_zone, strftime.c now assumes it is not NULL. 1002 This simplifies the code and is consistent with zdump.c. 1003 (Problem reported by Christos Zoulas.) 1004 1005 Changes affecting documentation 1006 1007 The tzfile man page now documents that transition times denote the 1008 starts (not the ends) of the corresponding time periods. 1009 (Ambiguity reported by Bill Seymour.) 1010 1011 1012 Release 2015f - 2015-08-10 18:06:56 -0700 1013 1014 Changes affecting future time stamps 1015 1016 North Korea switches to +0830 on 2015-08-15. (Thanks to Steffen Thorsen.) 1017 The abbreviation remains "KST". (Thanks to Robert Elz.) 1018 1019 Uruguay no longer observes DST. (Thanks to Steffen Thorsen 1020 and Pablo Camargo.) 1021 1022 Changes affecting past and future time stamps 1023 1024 Moldova starts and ends DST at 00:00 UTC, not at 01:00 UTC. 1025 (Thanks to Roman Tudos.) 1026 1027 Changes affecting data format and code 1028 1029 zic's '-y YEARISTYPE' option is no longer documented. The TYPE 1030 field of a Rule line should now be '-'; the old values 'even', 1031 'odd', 'uspres', 'nonpres', 'nonuspres' were already undocumented. 1032 Although the implementation has not changed, these features do not 1033 work in the default installation, they are not used in the data, 1034 and they are now considered obsolescent. 1035 1036 zic now checks that two rules don't take effect at the same time. 1037 (Thanks to Jon Skeet and Arthur David Olson.) Constraints on 1038 simultaneity are now documented. 1039 1040 The two characters '%z' in a zone format now stand for the UT 1041 offset, e.g., '-07' for seven hours behind UT and '+0530' for 1042 five hours and thirty minutes ahead. This better supports time 1043 zone abbreviations conforming to POSIX.1-2001 and later. 1044 1045 Changes affecting installed data files 1046 1047 Comments for America/Halifax and America/Glace_Bay have been improved. 1048 (Thanks to Brian Inglis.) 1049 1050 Data entries have been simplified for Atlantic/Canary, Europe/Simferopol, 1051 Europe/Sofia, and Europe/Tallinn. This yields slightly smaller 1052 installed data files for Europe/Simferopol and Europe/Tallinn. 1053 It does not affect timestamps. (Thanks to Howard Hinnant.) 1054 1055 Changes affecting code 1056 1057 zdump and zic no longer warn about valid time zone abbreviations 1058 like '-05'. 1059 1060 Some Visual Studio 2013 warnings have been suppressed. 1061 (Thanks to Kees Dekker.) 1062 1063 'date' no longer sets the time of day and its -a, -d, -n and -t 1064 options have been removed. Long obsolescent, the implementation 1065 of these features had porting problems. Builders no longer need 1066 to configure HAVE_ADJTIME, HAVE_SETTIMEOFDAY, or HAVE_UTMPX_H. 1067 (Thanks to Kees Dekker for pointing out the problem.) 1068 1069 Changes affecting documentation 1070 1071 The Theory file mentions naming issues earlier, as these seem to be 1072 poorly publicized (thanks to Gilmore Davidson for reporting the problem). 1073 1074 tz-link.htm mentions Time Zone Database Parser (thanks to Howard Hinnant). 1075 1076 Mention that Herbert Samuel introduced the term "Summer Time". 1077 1078 1079 Release 2015e - 2015-06-13 10:56:02 -0700 1080 1081 Changes affecting future time stamps 1082 1083 Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00, 1084 not 06-13 and 07-18 as we had guessed. (Thanks to Milamber.) 1085 1086 Assume Cayman Islands will observe DST starting next year, using US rules. 1087 Although it isn't guaranteed, it is the most likely. 1088 1089 Changes affecting data format 1090 1091 The file 'iso3166.tab' now uses UTF-8, so that its entries can better 1092 spell the names of land Islands, Cte d'Ivoire, and Runion. 1093 1094 Changes affecting code 1095 1096 When displaying data, tzselect converts it to the current locale's 1097 encoding if the iconv command works. (Problem reported by random832.) 1098 1099 tzselect no longer mishandles Dominica, fixing a bug introduced 1100 in Release 2014f. (Problem reported by Owen Leibman.) 1101 1102 zic -l no longer fails when compiled with -DTZDEFAULT=\"/etc/localtime\". 1103 This fixes a bug introduced in Release 2014f. 1104 (Problem reported by Leonardo Chiquitto.) 1105 1106 1107 Release 2015d - 2015-04-24 08:09:46 -0700 1108 1109 Changes affecting future time stamps 1110 1111 Egypt will not observe DST in 2015 and will consider canceling it 1112 permanently. For now, assume no DST indefinitely. 1113 (Thanks to Ahmed Nazmy and Tim Parenti.) 1114 1115 Changes affecting past time stamps 1116 1117 America/Whitehorse switched from UT -09 to -08 on 1967-05-28, not 1118 1966-07-01. Also, Yukon's time zone history is documented better. 1119 (Thanks to Brian Inglis and Dennis Ferguson.) 1120 1121 Change affecting past and future time zone abbreviations 1122 1123 The abbreviations for Hawaii-Aleutian standard and daylight times 1124 have been changed from HAST/HADT to HST/HDT, as per US Government 1125 Printing Office style. This affects only America/Adak since 1983, 1126 as America/Honolulu was already using the new style. 1127 1128 Changes affecting code 1129 1130 zic has some minor performance improvements. 1131 1132 1133 Release 2015c - 2015-04-11 08:55:55 -0700 1134 1135 Changes affecting future time stamps 1136 1137 Egypt's spring-forward transition is at 24:00 on April's last Thursday, 1138 not 00:00 on April's last Friday. 2015's transition will therefore be on 1139 Thursday, April 30 at 24:00, not Friday, April 24 at 00:00. Similar fixes 1140 apply to 2026, 2037, 2043, etc. (Thanks to Steffen Thorsen.) 1141 1142 Changes affecting past time stamps 1143 1144 The following changes affect some pre-1991 Chile-related time stamps 1145 in America/Santiago, Antarctica/Palmer, and Pacific/Easter. 1146 1147 The 1910 transition was January 10, not January 1. 1148 1149 The 1918 transition was September 10, not September 1. 1150 1151 The UT -04 time observed from 1932 to 1942 is now considered to 1152 be standard time, not year-round DST. 1153 1154 Santiago observed DST (UT -03) from 1946-07-15 through 1155 1946-08-31, then reverted to standard time, then switched to -05 1156 on 1947-04-01. 1157 1158 Assume transitions before 1968 were at 00:00, since we have no data 1159 saying otherwise. 1160 1161 The spring 1988 transition was 1988-10-09, not 1988-10-02. 1162 The fall 1990 transition was 1990-03-11, not 1990-03-18. 1163 1164 Assume no UT offset change for Pacific/Easter on 1890-01-01, 1165 and omit all transitions on Pacific/Easter from 1942 through 1946 1166 since we have no data suggesting that they existed. 1167 1168 One more zone has been turned into a link, as it differed 1169 from an existing zone only for older time stamps. As usual, 1170 this change affects UT offsets in pre-1970 time stamps only. 1171 The zone's old contents have been moved to the 'backzone' file. 1172 The affected zone is America/Montreal. 1173 1174 Changes affecting commentary 1175 1176 Mention the TZUpdater tool. 1177 1178 Mention "The Time Now". (Thanks to Brandon Ramsey.) 1179 1180 1181 Release 2015b - 2015-03-19 23:28:11 -0700 1182 1183 Changes affecting future time stamps 1184 1185 Mongolia will start observing DST again this year, from the last 1186 Saturday in March at 02:00 to the last Saturday in September at 00:00. 1187 (Thanks to Ganbold Tsagaankhuu.) 1188 1189 Palestine will start DST on March 28, not March 27. Also, 1190 correct the fall 2014 transition from September 26 to October 24. 1191 Adjust future predictions accordingly. (Thanks to Steffen Thorsen.) 1192 1193 Changes affecting past time stamps 1194 1195 The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a 1196 regression. (Thanks to Stuart Bishop for reporting the problem.) 1197 1198 Some more zones have been turned into links, when they differed 1199 from existing zones only for older time stamps. As usual, 1200 these changes affect UT offsets in pre-1970 time stamps only. 1201 Their old contents have been moved to the 'backzone' file. 1202 The affected zones are: America/Antigua, America/Cayman, 1203 Pacific/Midway, and Pacific/Saipan. 1204 1205 Changes affecting time zone abbreviations 1206 1207 Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD". 1208 (Thanks to Hank W.) 1209 1210 Changes affecting code 1211 1212 Fix integer overflow bug in reference 'mktime' implementation. 1213 (Problem reported by Jrg Richter.) 1214 1215 Allow -Dtime_tz=time_t compilations, and allow -Dtime_tz=... libraries 1216 to be used in the same executable as standard-library time_t functions. 1217 (Problems reported by Bradley White.) 1218 1219 Changes affecting commentary 1220 1221 Cite the recent Mexican decree changing Quintana Roo's time zone. 1222 (Thanks to Carlos Ral Perasso.) 1223 1224 Likewise for the recent Chilean decree. (Thanks to Eduardo Romero Urra.) 1225 1226 Update info about Mars time. 1227 1228 1229 Release 2015a - 2015-01-29 22:35:20 -0800 1230 1231 Changes affecting future time stamps 1232 1233 The Mexican state of Quintana Roo, represented by America/Cancun, 1234 will shift from Central Time with DST to Eastern Time without DST 1235 on 2015-02-01 at 02:00. (Thanks to Steffen Thorsen and Gwillim Law.) 1236 1237 Chile will not change clocks in April or thereafter; its new standard time 1238 will be its old daylight saving time. This affects America/Santiago, 1239 Pacific/Easter, and Antarctica/Palmer. (Thanks to Juan Correa.) 1240 1241 New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49. 1242 (Thanks to Tim Parenti.) 1243 1244 Changes affecting past time stamps 1245 1246 Iceland observed DST in 1919 and 1921, and its 1939 fallback 1247 transition was Oct. 29, not Nov. 29. Remove incorrect data from 1248 Shanks about time in Iceland between 1837 and 1908. 1249 1250 Some more zones have been turned into links, when they differed 1251 from existing zones only for older time stamps. As usual, 1252 these changes affect UT offsets in pre-1970 time stamps only. 1253 Their old contents have been moved to the 'backzone' file. 1254 The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait, 1255 and Asia/Muscat. 1256 1257 Changes affecting code 1258 1259 tzalloc now scrubs time zone abbreviations compatibly with the way 1260 that tzset always has, by replacing invalid bytes with '_' and by 1261 shortening too-long abbreviations. 1262 1263 tzselect ports to POSIX awk implementations, no longer mishandles 1264 POSIX TZ settings when GNU awk is used, and reports POSIX TZ 1265 settings to the user. (Thanks to Stefan Kuhn.) 1266 1267 Changes affecting build procedure 1268 1269 'make check' now checks for links to links in the data. 1270 One such link (for Africa/Asmera) has been fixed. 1271 (Thanks to Stephen Colebourne for pointing out the problem.) 1272 1273 Changes affecting commentary 1274 1275 The leapseconds file commentary now mentions the expiration date. 1276 (Problem reported by Martin Burnicki.) 1277 1278 Update Mexican Library of Congress URL. 1279 1280 1281 Release 2014j - 2014-11-10 17:37:11 -0800 1282 1283 Changes affecting current and future time stamps 1284 1285 Turks & Caicos' switch from US eastern time to UT -04 year-round 1286 did not occur on 2014-11-02 at 02:00. It's currently scheduled 1287 for 2015-11-01 at 02:00. (Thanks to Chris Walton.) 1288 1289 Changes affecting past time stamps 1290 1291 Many pre-1989 time stamps have been corrected for Asia/Seoul and 1292 Asia/Pyongyang, based on sources for the Korean-language Wikipedia 1293 entry for time in Korea. (Thanks to Sanghyuk Jung.) Also, no 1294 longer guess that Pyongyang mimicked Seoul time after World War II, 1295 as this is politically implausible. 1296 1297 Some more zones have been turned into links, when they differed 1298 from existing zones only for older time stamps. As usual, 1299 these changes affect UT offsets in pre-1970 time stamps only. 1300 Their old contents have been moved to the 'backzone' file. 1301 The affected zones are: Africa/Addis_Ababa, Africa/Asmara, 1302 Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Kampala, 1303 Africa/Mogadishu, Indian/Antananarivo, Indian/Comoro, and 1304 Indian/Mayotte. 1305 1306 Changes affecting commentary 1307 1308 The commentary is less enthusiastic about Shanks as a source, 1309 and is more careful to distinguish UT from UTC. 1310 1311 1312 Release 2014i - 2014-10-21 22:04:57 -0700 1313 1314 Changes affecting future time stamps 1315 1316 Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00. 1317 (Thanks to Ken Rylander for the heads-up.) Guess that future 1318 years will use a similar pattern. 1319 1320 A new Zone Pacific/Bougainville, for the part of Papua New Guinea 1321 that plans to switch from UT +10 to +11 on 2014-12-28 at 02:00. 1322 (Thanks to Kiley Walbom for the heads-up.) 1323 1324 Changes affecting time zone abbreviations 1325 1326 Since Belarus is not changing its clocks even though Moscow is, 1327 the time zone abbreviation in Europe/Minsk is changing from FET 1328 to its more-traditional value MSK on 2014-10-26 at 01:00. 1329 (Thanks to Alexander Bokovoy for the heads-up about Belarus.) 1330 1331 The new abbreviation IDT stands for the pre-1976 use of UT +08 in 1332 Indochina, to distinguish it better from ICT (+07). 1333 1334 Changes affecting past time stamps 1335 1336 Many time stamps have been corrected for Asia/Ho_Chi_Minh before 1976 1337 (thanks to Trn Ngc Qun for an indirect pointer to Trn Tin Bnh's 1338 authoritative book). Asia/Ho_Chi_Minh has been added to 1339 zone1970.tab, to give tzselect users in Vietnam two choices, 1340 since north and south Vietnam disagreed after our 1970 cutoff. 1341 1342 Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as 1343 they differed from existing zones only for older time stamps. As 1344 usual, these changes affect pre-1970 time stamps only. Their old 1345 contents have been moved to the 'backzone' file. 1346 1347 Changes affecting code 1348 1349 The time-related library functions now set errno on failure, and 1350 some crashes in the new tzalloc-related library functions have 1351 been fixed. (Thanks to Christos Zoulas for reporting most of 1352 these problems and for suggesting fixes.) 1353 1354 If USG_COMPAT is defined and the requested timestamp is standard time, 1355 the tz library's localtime and mktime functions now set the extern 1356 variable timezone to a value appropriate for that timestamp; and 1357 similarly for ALTZONE, daylight saving time, and the altzone variable. 1358 This change is a companion to the tzname change in 2014h, and is 1359 designed to make timezone and altzone more compatible with tzname. 1360 1361 The tz library's functions now set errno to EOVERFLOW if they fail 1362 because the result cannot be represented. ctime and ctime_r now 1363 return NULL and set errno when a timestamp is out of range, rather 1364 than having undefined behavior. 1365 1366 Some bugs associated with the new 2014g functions have been fixed. 1367 This includes a bug that largely incapacitated the new functions 1368 time2posix_z and posix2time_z. (Thanks to Christos Zoulas.) 1369 It also includes some uses of uninitialized variables after tzalloc. 1370 The new code uses the standard type 'ssize_t', which the Makefile 1371 now gives porting advice about. 1372 1373 Changes affecting commentary 1374 1375 Updated URLs for NRC Canada (thanks to Matt Johnson and Brian Inglis). 1376 1377 1378 Release 2014h - 2014-09-25 18:59:03 -0700 1379 1380 Changes affecting past timestamps 1381 1382 America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28. 1383 1384 Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01, 1385 not 1920-01-06. The old entry was based on a misinterpretation of Shanks. 1386 1387 Some more zones have been turned into links, when they differed 1388 from existing zones only for older timestamps. As usual, 1389 these changes affect UT offsets in pre-1970 timestamps only. 1390 Their old contents have been moved to the 'backzone' file. 1391 The affected zones are: Africa/Blantyre, Africa/Bujumbura, 1392 Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi, 1393 Africa/Lusaka, Africa/Maseru, and Africa/Mbabane. 1394 1395 Changes affecting code 1396 1397 zdump -V and -v now output gmtoff= values on all platforms, 1398 not merely on platforms defining TM_GMTOFF. 1399 1400 The tz library's localtime and mktime functions now set tzname to a value 1401 appropriate for the requested timestamp, and zdump now uses this 1402 on platforms not defining TM_ZONE, fixing a 2014g regression. 1403 (Thanks to Tim Parenti for reporting the problem.) 1404 1405 The tz library no longer sets tzname if localtime or mktime fails. 1406 1407 zdump -c no longer mishandles transitions near year boundaries. 1408 (Thanks to Tim Parenti for reporting the problem.) 1409 1410 An access to uninitialized data has been fixed. 1411 (Thanks to Jrg Richter for reporting the problem.) 1412 1413 When THREAD_SAFE is defined, the code ports to the C11 memory model. 1414 A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined 1415 and two threads race to initialize data used by gmtime-like functions. 1416 (Thanks to Andy Heninger for reporting the problems.) 1417 1418 Changes affecting build procedure 1419 1420 'make check' now checks better for properly-sorted data. 1421 1422 Changes affecting documentation and commentary 1423 1424 zdump's gmtoff=N output is now documented, and its isdst=D output 1425 is now documented to possibly output D values other than 0 or 1. 1426 1427 zdump -c's treatment of years is now documented to use the 1428 Gregorian calendar and Universal Time without leap seconds, 1429 and its behavior at cutoff boundaries is now documented better. 1430 (Thanks to Arthur David Olson and Tim Parenti for reporting the problems.) 1431 1432 Programs are now documented to use the proleptic Gregorian calendar. 1433 (Thanks to Alan Barrett for the suggestion.) 1434 1435 Fractional-second GMT offsets have been documented for civil time 1436 in 19th-century Chennai, Jakarta, and New York. 1437 1438 1439 Release 2014g - 2014-08-28 12:31:23 -0700 1440 1441 Changes affecting future timestamps 1442 1443 Turks & Caicos is switching from US eastern time to UT -04 1444 year-round, modeled as a switch on 2014-11-02 at 02:00. 1445 [As noted in 2014j, this switch was later delayed.] 1446 1447 Changes affecting past timestamps 1448 1449 Time in Russia or the USSR before 1926 or so has been corrected by 1450 a few seconds in the following zones: Asia/Irkutsk, 1451 Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi, 1452 Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara. For 1453 Asia/Yekaterinburg the correction is a few minutes. (Thanks to 1454 Vladimir Karpinsky.) 1455 1456 The Portuguese decree of 1911-05-26 took effect on 1912-01-01. 1457 This affects 1911 timestamps in Africa/Bissau, Africa/Luanda, 1458 Atlantic/Azores, and Atlantic/Madeira. Also, Lisbon's pre-1912 1459 GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32. 1460 (Thanks to Stephen Colebourne for pointing to the decree.) 1461 1462 Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59. 1463 1464 A new file 'backzone' contains data which may appeal to 1465 connoisseurs of old timestamps, although it is out of scope for 1466 the tz database, is often poorly sourced, and contains some data 1467 that is known to be incorrect. The new file is not recommended 1468 for ordinary use and its entries are not installed by default. 1469 (Thanks to Lester Caine for the high-quality Jersey, Guernsey, and 1470 Isle of Man entries.) 1471 1472 Some more zones have been turned into links, when they differed 1473 from existing zones only for older timestamps. As usual, 1474 these changes affect UT offsets in pre-1970 timestamps only. 1475 Their old contents have been moved to the 'backzone' file. 1476 The affected zones are: Africa/Bangui, Africa/Brazzaville, 1477 Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda, 1478 Africa/Malabo, Africa/Niamey, and Africa/Porto-Novo. 1479 1480 Changes affecting code 1481 1482 Unless NETBSD_INSPIRED is defined to 0, the tz library now 1483 supplies functions for creating and using objects that represent 1484 time zones. The new functions are tzalloc, tzfree, localtime_rz, 1485 mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and 1486 time2posix_z. They are intended for performance: for example, 1487 localtime_rz (unlike localtime_r) is trivially thread-safe without 1488 locking. (Thanks to Christos Zoulas for proposing NetBSD-inspired 1489 functions, and to Alan Barrett and Jonathan Lennox for helping to 1490 debug the change.) 1491 1492 zdump now builds with the tz library unless USE_LTZ is defined to 0, 1493 This lets zdump use tz features even if the system library lacks them. 1494 To build zdump with the system library, use 'make CFLAGS=-DUSE_LTZ=0 1495 TZDOBJS=zdump.o CHECK_TIME_T_ALTERNATIVES='. 1496 1497 zdump now uses localtime_rz if available, as it's significantly faster, 1498 and it can help zdump better diagnose invalid time zone names. 1499 Define HAVE_LOCALTIME_RZ to 0 to suppress this. HAVE_LOCALTIME_RZ 1500 defaults to 1 if NETBSD_INSPIRED && USE_LTZ. When localtime_rz is 1501 not available, zdump now uses localtime_r and tzset if available, 1502 as this is a bit cleaner and faster than plain localtime. Compile 1503 with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system 1504 lacks these two functions. 1505 1506 If THREAD_SAFE is defined to 1, the tz library is now thread-safe. 1507 Although not needed for tz's own applications, which are single-threaded, 1508 this supports POSIX better if the tz library is used in multithreaded apps. 1509 1510 Some crashes have been fixed when zdump or the tz library is given 1511 invalid or outlandish input. 1512 1513 The tz library no longer mishandles leap seconds on platforms with 1514 unsigned time_t in time zones that lack ordinary transitions after 1970. 1515 1516 The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not 1517 already defined, to make it easier to configure on common platforms. 1518 Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this. 1519 1520 Unless the new macro UNINIT_TRAP is defined to 1, the tz code now 1521 assumes that reading uninitialized memory yields garbage values 1522 but does not cause other problems such as traps. 1523 1524 If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now 1525 more likely to guess right for ambiguous timestamps near 1526 transitions where tm_isdst does not change. 1527 1528 If HAVE_STRFTIME_L is defined to 1, the tz library now defines 1529 strftime_l for compatibility with recent versions of POSIX. 1530 Only the C locale is supported, though. HAVE_STRFTIME_L defaults 1531 to 1 on recent POSIX versions, and to 0 otherwise. 1532 1533 tzselect -c now uses a hybrid distance measure that works better 1534 in Africa. (Thanks to Alan Barrett for noting the problem.) 1535 1536 The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used, 1537 or when time_tz is defined. 1538 1539 When HAVE_UTMPX_H is set the 'date' command now builds on systems 1540 whose <utmpx.h> file does not define WTMPX_FILE, and when setting 1541 the date it updates the wtmpx file if _PATH_WTMPX is defined. 1542 This affects GNU/Linux and similar systems. 1543 1544 For easier maintenance later, some C code has been simplified, 1545 some lint has been removed, and the code has been tweaked so that 1546 plain 'make' is more likely to work. 1547 1548 The C type 'bool' is now used for boolean values, instead of 'int'. 1549 1550 The long-obsolete LOCALE_HOME code has been removed. 1551 1552 The long-obsolete 'gtime' function has been removed. 1553 1554 Changes affecting build procedure 1555 1556 'zdump' no longer links in ialloc.o, as it's not needed. 1557 1558 'make check_time_t_alternatives' no longer assumes GNU diff. 1559 1560 Changes affecting distribution tarballs 1561 1562 The files checktab.awk and zoneinfo2tdf.pl are now distributed in 1563 the tzdata tarball instead of the tzcode tarball, since they help 1564 maintain the data. The NEWS and Theory files are now also 1565 distributed in the tzdata tarball, as they're relevant for data. 1566 (Thanks to Alan Barrett for pointing this out.) Also, the 1567 leapseconds.awk file is no longer distributed in the tzcode 1568 tarball, since it belongs in the tzdata tarball (where 2014f 1569 inadvertently also distributed it). 1570 1571 Changes affecting documentation and commentary 1572 1573 A new file CONTRIBUTING is distributed. (Thanks to Tim Parenti for 1574 suggesting a CONTRIBUTING file, and to Tony Finch and Walter Harms 1575 for debugging it.) 1576 1577 The man pages have been updated to use function prototypes, 1578 to document thread-safe variants like localtime_r, and to document 1579 the NetBSD-inspired functions tzalloc, tzfree, localtime_rz, and 1580 mktime_z. 1581 1582 The fields in Link lines have been renamed to be more descriptive 1583 and more like the parameters of 'ln'. LINK-FROM has become TARGET, 1584 and LINK-TO has become LINK-NAME. 1585 1586 tz-link.htm mentions the IETF's tzdist working group; Windows 1587 Runtime etc. (thanks to Matt Johnson); and HP-UX's tztab. 1588 1589 Some broken URLs have been fixed in the commentary. (Thanks to 1590 Lester Caine.) 1591 1592 Commentary about Philippines DST has been updated, and commentary 1593 on pre-1970 time in India has been added. 1594 1595 1596 Release 2014f - 2014-08-05 17:42:36 -0700 1597 1598 Changes affecting future timestamps 1599 1600 Russia will subtract an hour from most of its time zones on 2014-10-26 1601 at 02:00 local time. (Thanks to Alexander Krivenyshev.) 1602 There are a few exceptions: Magadan Oblast (Asia/Magadan) and Zabaykalsky 1603 Krai are subtracting two hours; conversely, Chukotka Autonomous Okrug 1604 (Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka), Kemerovo Oblast 1605 (Asia/Novokuznetsk), and the Samara Oblast and the Udmurt Republic 1606 (Europe/Samara) are not changing their clocks. The changed zones are 1607 Europe/Kaliningrad, Europe/Moscow, Europe/Simferopol, Europe/Volgograd, 1608 Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk, 1609 Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Khandyga, 1610 Asia/Sakhalin, and Asia/Ust-Nera; Asia/Magadan will have two hours 1611 subtracted; and Asia/Novokuznetsk's time zone abbreviation is affected, 1612 but not its UTC offset. Two zones are added: Asia/Chita (split 1613 from Asia/Yakutsk, and also with two hours subtracted) and 1614 Asia/Srednekolymsk (split from Asia/Magadan, but with only one hour 1615 subtracted). (Thanks to Tim Parenti for much of the above.) 1616 1617 Changes affecting time zone abbreviations 1618 1619 Australian eastern time zone abbreviations are now AEST/AEDT not EST, 1620 and similarly for the other Australian zones. That is, for eastern 1621 standard and daylight saving time the abbreviations are AEST and AEDT 1622 instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT, 1623 and AWST/AWDT are now used instead of the former CST, CWST, and WST. 1624 This change does not affect UT offsets, only time zone abbreviations. 1625 (Thanks to Rich Tibbett and many others.) 1626 1627 Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07) 1628 effective 2014-10-26 at 02:00 local time. 1629 1630 The time zone abbreviation for Xinjiang Time (observed in rmqi) 1631 has been changed from URUT to XJT. (Thanks to Luther Ma.) 1632 1633 Prefer MSK/MSD for Moscow time in Russia, even in other cities. 1634 Similarly, prefer EET/EEST for eastern European time in Russia. 1635 1636 Change time zone abbreviations in (western) Samoa to use "ST" and 1637 "DT" suffixes, as this is more likely to match common practice. 1638 Prefix "W" to (western) Samoa time when its standard-time offset 1639 disagrees with that of American Samoa. 1640 1641 America/Metlakatla now uses PST, not MeST, to abbreviate its time zone. 1642 1643 Time zone abbreviations have been updated for Japan's two time 1644 zones used 1896-1937. JWST now stands for Western Standard 1645 Time, and JCST for Central Standard Time (formerly this was CJT). 1646 These abbreviations are now used for time in Korea, Taiwan, 1647 and Sakhalin while controlled by Japan. 1648 1649 Changes affecting past timestamps 1650 1651 China's five zones have been simplified to two, since the post-1970 1652 differences in the other three seem to have been imaginary. The 1653 zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been 1654 removed; backwards-compatibility links still work, albeit with 1655 different behaviors for timestamps before May 1980. Asia/Urumqi's 1656 1980 transition to UT +08 has been removed, so that it is now at 1657 +06 and not +08. (Thanks to Luther Ma and to Alois Treindl; 1658 Treindl sent helpful translations of two papers by Guo Qingsheng.) 1659 1660 Some zones have been turned into links, when they differed from existing 1661 zones only for older UT offsets where data entries were likely invented. 1662 These changes affect UT offsets in pre-1970 timestamps only. This is 1663 similar to the change in release 2013e, except this time for western 1664 Africa. The affected zones are: Africa/Bamako, Africa/Banjul, 1665 Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome, 1666 Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, and 1667 Atlantic/St_Helena. This also affects the backwards-compatibility 1668 link Africa/Timbuktu. (Thanks to Alan Barrett, Stephen Colebourne, 1669 Tim Parenti, and David Patte for reporting problems in earlier 1670 versions of this change.) 1671 1672 Asia/Shanghai's pre-standard-time UT offset has been changed from 1673 8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its 1674 transition to standard time has been changed from 1928 to 1901. 1675 1676 Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01, 1677 then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945. 1678 In 1946 it observed DST from 05-15 through 09-30; in 1947 1679 from 04-15 through 10-31; and in 1979 from 07-01 through 09-30. 1680 (Thanks to Yu-Cheng Chuang.) 1681 1682 Asia/Riyadh's transition to standard time is now 1947-03-14, not 1950. 1683 1684 Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not 1685 10-03 at 00:00. (Thanks to Konstantin Hyppnen.) 1686 1687 Pacific/Pago_Pago has been changed from UT -11:30 to -11 for the 1688 period from 1911 to 1950. 1689 1690 Pacific/Chatham has been changed to New Zealand standard time plus 1691 45 minutes for the period before 1957, reflecting a 1956 remark in 1692 the New Zealand parliament. 1693 1694 Europe/Budapest has several pre-1946 corrections: in 1918 the transition 1695 out of DST was on 09-16, not 09-29; in 1919 it was on 11-24, not 09-15; in 1696 1945 it was on 11-01, not 11-03; in 1941 the transition to DST was 04-08 1697 not 04-06 at 02:00; and there was no DST in 1920. 1698 1699 Africa/Accra is now assumed to have observed DST from 1920 through 1935. 1700 1701 Time in Russia before 1927 or so has been corrected by a few seconds in 1702 the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi, 1703 Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg, Europe/Helsinki, and 1704 Europe/Riga. Also, Moscow's location has been changed to its Kilometer 0 1705 point. (Thanks to Vladimir Karpinsky for the Moscow changes.) 1706 1707 Changes affecting data format 1708 1709 A new file 'zone1970.tab' supersedes 'zone.tab' in the installed data. 1710 The new file's extended format allows multiple country codes per zone. 1711 The older file is still installed but is deprecated; its format is 1712 not changing and it will still be distributed for a while, but new 1713 applications should use the new file. 1714 1715 The new file format simplifies maintenance of obscure locations. 1716 To test this, it adds coverage for the Crozet Islands and the 1717 Scattered Islands. (Thanks to Tobias Conradi and Antoine Leca.) 1718 1719 The file 'iso3166.tab' is planned to switch from ASCII to UTF-8. 1720 It is still ASCII now, but commentary about the switch has been added. 1721 The new file 'zone1970.tab' already uses UTF-8. 1722 1723 Changes affecting code 1724 1725 'localtime', 'mktime', etc. now use much less stack space if ALL_STATE 1726 is defined. (Thanks to Elliott Hughes for reporting the problem.) 1727 1728 'zic' no longer mishandles input when ignoring case in locales that 1729 are not compatible with English, e.g., unibyte Turkish locales when 1730 compiled with HAVE_GETTEXT. 1731 1732 Error diagnostics of 'zic' and 'yearistype' have been reworded so that 1733 they no longer use ASCII '-' as if it were a dash. 1734 1735 'zic' now rejects output file names that contain '.' or '..' components. 1736 (Thanks to Tim Parenti for reporting the problem.) 1737 1738 'zic -v' now warns about output file names that do not follow 1739 POSIX rules, or that contain a digit or '.'. (Thanks to Arthur 1740 David Olson for starting the ball rolling on this.) 1741 1742 Some lint has been removed when using GCC_DEBUG_FLAGS with GCC 4.9.0. 1743 1744 Changes affecting build procedure 1745 1746 'zic' no longer links in localtime.o and asctime.o, as they're not needed. 1747 (Thanks to John Cochran.) 1748 1749 Changes affecting documentation and commentary 1750 1751 The 'Theory' file documents legacy names, the longstanding 1752 exceptions to the POSIX-inspired file name rules. 1753 1754 The 'zic' documentation clarifies the role of time types when 1755 interpreting dates. (Thanks to Arthur David Olson.) 1756 1757 Documentation and commentary now prefer UTF-8 to US-ASCII, 1758 allowing the use of proper accents in foreign words and names. 1759 Code and data have not changed because of this. (Thanks to 1760 Garrett Wollman, Ian Abbott, and Guy Harris for helping to debug 1761 this.) 1762 1763 Non-HTML documentation and commentary now use plain-text URLs instead of 1764 HTML insertions, and are more consistent about bracketing URLs when they 1765 are not already surrounded by white space. (Thanks to suggestions by 1766 Steffen Nurpmeso.) 1767 1768 There is new commentary about Xujiahui Observatory, the five time-zone 1769 project in China from 1918 to 1949, timekeeping in Japanese-occupied 1770 Shanghai, and Tibet Time in the 1950s. The sharp-eyed can spot the 1771 warlord Jin Shuren in the data. 1772 1773 Commentary about the coverage of each Russian zone has been standardized. 1774 (Thanks to Tim Parenti). 1775 1776 There is new commentary about contemporary timekeeping in Ethiopia. 1777 1778 Obsolete comments about a 2007 proposal for DST in Kuwait has been removed. 1779 1780 There is new commentary about time in Poland in 1919. 1781 1782 Proper credit has been given to DST inventor George Vernon Hudson. 1783 1784 Commentary about time in Metlakatla, AK and Resolute, NU has been 1785 improved, with a new source for the former. 1786 1787 In zone.tab, Pacific/Easter no longer mentions Salas y Gmez, as it 1788 is uninhabited. 1789 1790 Commentary about permanent Antarctic bases has been updated. 1791 1792 Several typos have been corrected. (Thanks to Tim Parenti for 1793 contributing some of these fixes.) 1794 1795 tz-link.htm now mentions the JavaScript libraries Moment Timezone, 1796 TimezoneJS.Date, Walltime-js, and Timezone. (Thanks to a heads-up 1797 from Matt Johnson.) Also, it mentions the Go 'latlong' package. 1798 (Thanks to a heads-up from Dirkjan Ochtman.) 1799 1800 The files usno1988, usno1989, usno1989a, usno1995, usno1997, and usno1998 1801 have been removed. These obsolescent US Naval Observatory entries were no 1802 longer helpful for maintenance. (Thanks to Tim Parenti for the suggestion.) 1803 1804 1805 Release 2014e - 2014-06-12 21:53:52 -0700 1806 1807 Changes affecting near-future timestamps 1808 1809 Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00. 1810 (Thanks to Imed Chihi.) Guess that from 2015 on Egypt will temporarily 1811 switch to standard time at 24:00 the last Thursday before Ramadan, and 1812 back to DST at 00:00 the first Friday after Ramadan. 1813 1814 Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00. (Thanks 1815 to Milamber Space Network.) Guess that from 2015 on Morocco will 1816 temporarily switch to standard time at 03:00 the last Saturday before 1817 Ramadan, and back to DST at 02:00 the first Saturday after Ramadan. 1818 1819 Changes affecting past timestamps 1820 1821 The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of 1822 "MSD" for Moscow's double daylight time in summer 1921. Also, a typo 1823 "VLASST" has been repaired to be "VLAST" for Vladivostok summer time 1824 in 1991. (Thanks to Hank W. for reporting the problems.) 1825 1826 Changes affecting commentary 1827 1828 tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the 1829 draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and 1830 removes stale pointers to World Time Explorer and WORLDTIME. 1831 1832 1833 Release 2014d - 2014-05-27 21:34:40 -0700 1834 1835 Changes affecting code 1836 1837 zic no longer generates files containing timestamps before the Big Bang. 1838 This works around GNOME bug 730332 1839 <https://bugzilla.gnome.org/show_bug.cgi?id=730332>. 1840 (Thanks to Leonardo Chiquitto for reporting the bug, and to 1841 Arthur David Olson and James Cloos for suggesting improvements to the fix.) 1842 1843 Changes affecting documentation 1844 1845 tz-link.htm now mentions GNOME. 1846 1847 1848 Release 2014c - 2014-05-13 07:44:13 -0700 1849 1850 Changes affecting near-future timestamps 1851 1852 Egypt observes DST starting 2014-05-15 at 24:00. 1853 (Thanks to Ahmad El-Dardiry and Gunther Vermier.) 1854 Details have not been announced, except that DST will not be observed 1855 during Ramadan. Guess that DST will stop during the same Ramadan dates as 1856 Morocco, and that Egypt's future spring and fall transitions will be the 1857 same as 2010 when it last observed DST, namely April's last Friday at 1858 00:00 to September's last Thursday at 23:00 standard time. Also, guess 1859 that Ramadan transitions will be at 00:00 standard time. 1860 1861 Changes affecting code 1862 1863 zic now generates transitions for minimum time values, eliminating guesswork 1864 when handling low-valued timestamps. (Thanks to Arthur David Olson.) 1865 1866 Port to Cygwin sans glibc. (Thanks to Arthur David Olson.) 1867 1868 Changes affecting commentary and documentation 1869 1870 Remove now-confusing comment about Jordan. (Thanks to Oleksii Nochovnyi.) 1871 1872 1873 Release 2014b - 2014-03-24 21:28:50 -0700 1874 1875 Changes affecting near-future timestamps 1876 1877 Crimea switches to Moscow time on 2014-03-30 at 02:00 local time. 1878 (Thanks to Alexander Krivenyshev.) Move its zone.tab entry from UA to RU. 1879 1880 New entry for Troll station, Antarctica. (Thanks to Paul-Inge Flakstad and 1881 Bengt-Inge Larsson.) This is currently an approximation; a better version 1882 will require the zic and localtime fixes mentioned below, and the plan is 1883 to wait for a while until at least the zic fixes propagate. 1884 1885 Changes affecting code 1886 1887 'zic' and 'localtime' no longer reject locations needing four transitions 1888 per year for the foreseeable future. (Thanks to Andrew Main (Zefram).) 1889 Also, 'zic' avoids some unlikely failures due to integer overflow. 1890 1891 Changes affecting build procedure 1892 1893 'make check' now detects Rule lines defined but never used. 1894 The NZAQ rules, an instance of this problem, have been removed. 1895 1896 Changes affecting commentary and documentation 1897 1898 Fix Tuesday/Thursday typo in description of time in Israel. 1899 (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.) 1900 1901 Microsoft Windows 8.1 doesn't support tz database names. (Thanks 1902 to Donald MacQueen.) Instead, the Microsoft Windows Store app 1903 library supports them. 1904 1905 Add comments about Johnston Island time in the 1960s. 1906 (Thanks to Lyle McElhaney.) 1907 1908 Morocco's 2014 DST start will be as predicted. 1909 (Thanks to Sebastien Willemijns.) 1910 1911 1912 Release 2014a - 2014-03-07 23:30:29 -0800 1913 1914 Changes affecting near-future timestamps 1915 1916 Turkey begins DST on 2014-03-31, not 03-30. (Thanks to Faruk Pasin for 1917 the heads-up, and to Tim Parenti for simplifying the update.) 1918 1919 Changes affecting past timestamps 1920 1921 Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00. 1922 (Thanks to Steffen Thorsen.) 1923 1924 Ukraine switched from Moscow to Eastern European time on 1990-07-01 1925 (not 1992-01-01), and observed DST during the entire next winter. 1926 (Thanks to Vladimir in Moscow via Alois Treindl.) 1927 1928 In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03. 1929 (Thanks to Avigdor Finkelstein.) 1930 1931 Changes affecting code 1932 1933 A uninitialized-storage bug in 'localtime' has been fixed. 1934 (Thanks to Logan Chien.) 1935 1936 Changes affecting the build procedure 1937 1938 The settings for 'make check_web' now default to Ubuntu 13.10. 1939 1940 Changes affecting commentary and documentation 1941 1942 The boundary of the US Pacific time zone is given more accurately. 1943 (Thanks to Alan Mintz.) 1944 1945 Chile's 2014 DST will be as predicted. (Thanks to Jos Miguel Garrido.) 1946 1947 Paraguay's 2014 DST will be as predicted. (Thanks to Carlos Ral Perasso.) 1948 1949 Better descriptions of countries with same time zone history as 1950 Trinidad and Tobago since 1970. (Thanks to Alan Barrett for suggestion.) 1951 1952 Several changes affect tz-link.htm, the main web page. 1953 1954 Mention Time.is (thanks to Even Scharning) and WX-now (thanks to 1955 David Braverman). 1956 1957 Mention xCal (Internet RFC 6321) and jCal. 1958 1959 Microsoft has some support for tz database names. 1960 1961 CLDR data formats include both XML and JSON. 1962 1963 Mention Maggiolo's map of solar vs standard time. 1964 (Thanks to Arthur David Olson.) 1965 1966 Mention TZ4Net. (Thanks to Matt Johnson.) 1967 1968 Mention the timezone-olson Haskell package. 1969 1970 Mention zeitverschiebung.net. (Thanks to Martin Jger.) 1971 1972 Remove moribund links to daylight-savings-time.info and to 1973 Simple Timer + Clocks. 1974 1975 Update two links. (Thanks to Oscar van Vlijmen.) 1976 1977 Fix some formatting glitches, e.g., remove random newlines from 1978 abbr elements' title attributes. 1979 1980 1981 Release 2013i - 2013-12-17 07:25:23 -0800 1982 1983 Changes affecting near-future timestamps: 1984 1985 Jordan switches back to standard time at 00:00 on December 20, 2013. 1986 The 2006-2011 transition schedule is planned to resume in 2014. 1987 (Thanks to Steffen Thorsen.) 1988 1989 Changes affecting past timestamps: 1990 1991 In 2004, Cuba began DST on March 28, not April 4. 1992 (Thanks to Steffen Thorsen.) 1993 1994 Changes affecting code 1995 1996 The compile-time flag NOSOLAR has been removed, as nowadays the 1997 benefit of slightly shrinking runtime table size is outweighed by the 1998 cost of disallowing potential future updates that exceed old limits. 1999 2000 Changes affecting documentation and commentary 2001 2002 The files solar87, solar88, and solar89 are no longer distributed. 2003 They were a negative experiment - that is, a demonstration that 2004 tz data can represent solar time only with some difficulty and error. 2005 Their presence in the distribution caused confusion, as Riyadh 2006 civil time was generally not solar time in those years. 2007 2008 tz-link.htm now mentions Noda Time. (Thanks to Matt Johnson.) 2009 2010 2011 Release 2013h - 2013-10-25 15:32:32 -0700 2012 2013 Changes affecting current and future timestamps: 2014 2015 Libya has switched its UT offset back to +02 without DST, instead 2016 of +01 with DST. (Thanks to Even Scharning.) 2017 2018 Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules. 2019 (Thanks to Gwillim Law.) 2020 2021 Changes affecting future timestamps: 2022 2023 Acre and (we guess) western Amazonas will switch from UT -04 to -05 2024 on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe. 2025 (Thanks to Steffen Thorsen.) 2026 2027 Add entries for DST transitions in Morocco in the year 2038. 2028 This avoids some year-2038 glitches introduced in 2013g. 2029 (Thanks to Yoshito Umaoka for reporting the problem.) 2030 2031 Changes affecting API 2032 2033 The 'tzselect' command no longer requires the 'select' command, 2034 and should now work with /bin/sh on more platforms. It also works 2035 around a bug in BusyBox awk before version 1.21.0. (Thanks to 2036 Patrick 'P. J.' McDermott and Alan Barrett.) 2037 2038 Changes affecting code 2039 2040 Fix localtime overflow bugs with 32-bit unsigned time_t. 2041 2042 zdump no longer assumes sscanf returns maximal values on overflow. 2043 2044 Changes affecting the build procedure 2045 2046 The builder can specify which programs to use, if any, instead of 2047 'ar' and 'ranlib', and libtz.a is now built locally before being 2048 installed. (Thanks to Michael Forney.) 2049 2050 A dependency typo in the 'zdump' rule has been fixed. 2051 (Thanks to Andrew Paprocki.) 2052 2053 The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f' 2054 work as specified by POSIX.2-1992 or later; this is portable nowadays. 2055 2056 'make clean' no longer removes 'leapseconds', since it's 2057 host-independent and is part of the distribution. 2058 2059 The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed. 2060 2061 Changes affecting documentation and commentary 2062 2063 tz-link.htm now mentions TC TIMEZONE's draft time zone service protocol 2064 (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle). 2065 2066 Update URLs in tz-link page. Add URLs for Microsoft Windows, since 2067 8.1 introduces tz support. Remove URLs for Tru64 and UnixWare (no 2068 longer maintained) and for old advisories. SOFA now does C. 2069 2070 Release 2013g - 2013-09-30 21:08:26 -0700 2071 2072 Changes affecting current and near-future timestamps 2073 2074 Morocco now observes DST from the last Sunday in March to the last 2075 Sunday in October, not April to September respectively. (Thanks 2076 to Steffen Thorsen.) 2077 2078 Changes affecting 'zic' 2079 2080 'zic' now runs on platforms that lack both hard links and symlinks. 2081 (Thanks to Theo Veenker for reporting the problem, for MinGW.) 2082 Also, fix some bugs on platforms that lack hard links but have symlinks. 2083 2084 'zic -v' again warns that Asia/Tehran has no POSIX environment variable 2085 to predict the far future, fixing a bug introduced in 2013e. 2086 2087 Changes affecting the build procedure 2088 2089 The 'leapseconds' file is again put into the tzdata tarball. 2090 Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to 2091 Matt Burgess and Ian Abbott.) The timestamps of these and other 2092 dependent files in tarballs are adjusted more consistently. 2093 2094 Changes affecting documentation and commentary 2095 2096 The README file is now part of the data tarball as well as the code. 2097 It now states that files are public domain unless otherwise specified. 2098 (Thanks to Andrew Main (Zefram) for asking for clarifications.) 2099 Its details about the 1989 release moved to a place of honor near 2100 the end of NEWS. 2101 2102 2103 Release 2013f - 2013-09-24 23:37:36 -0700 2104 2105 Changes affecting near-future timestamps 2106 2107 Tocantins will very likely not observe DST starting this spring. 2108 (Thanks to Steffen Thorsen.) 2109 2110 Jordan will likely stay at UT +03 indefinitely, and will not fall 2111 back this fall. 2112 2113 Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.) 2114 2115 Changes affecting API 2116 2117 The types of the global variables 'timezone' and 'altzone' (if present) 2118 have been changed back to 'long'. This is required for 'timezone' 2119 by POSIX, and for 'altzone' by common practice, e.g., Solaris 11. 2120 These variables were originally 'long' in the tz code, but were 2121 mistakenly changed to 'time_t' in 1987; nobody reported the 2122 incompatibility until now. The difference matters on x32, where 2123 'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.) 2124 2125 Changes affecting the build procedure 2126 2127 Avoid long strings in leapseconds.awk to work around a mawk bug. 2128 (Thanks to Cyril Baurand.) 2129 2130 Changes affecting documentation and commentary 2131 2132 New file 'NEWS' that contains release notes like this one. 2133 2134 Paraguay's law does not specify DST transition time; 00:00 is customary. 2135 (Thanks to Waldemar Villamayor-Venialbo.) 2136 2137 Minor capitalization fixes. 2138 2139 Changes affecting version-control only 2140 2141 The experimental GitHub repository now contains annotated and 2142 signed tags for recent releases, e.g., '2013e' for Release 2013e. 2143 Releases are tagged starting with 2012e; earlier releases were 2144 done differently, and tags would either not have a simple name or 2145 not exactly match what was released. 2146 2147 'make set-timestamps' is now simpler and a bit more portable. 2148 2149 2150 Release 2013e - 2013-09-19 23:50:04 -0700 2151 2152 Changes affecting near-future timestamps 2153 2154 This year Fiji will start DST on October 27, not October 20. 2155 (Thanks to David Wheeler for the heads-up.) For now, guess that 2156 Fiji will continue to spring forward the Sunday before the fourth 2157 Monday in October. 2158 2159 Changes affecting current and future time zone abbreviations 2160 2161 Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian 2162 time zone abbreviations since 1932. (Thanks to George Ziegler, 2163 Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and 2164 Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura, 2165 Asia/Makassar, and Asia/Pontianak. 2166 2167 Use ART (UT -03, standard time), rather than WARST (also -03, but 2168 daylight saving time) for San Luis, Argentina since 2009. 2169 2170 Changes affecting Godthb timestamps after 2037 if version mismatch 2171 2172 Allow POSIX-like TZ strings where the transition time's hour can 2173 range from -167 through 167, instead of the POSIX-required 0 2174 through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the 2175 new Fiji rules. This is a more-compact way to represent 2176 far-future timestamps for America/Godthab, America/Santiago, 2177 Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem, 2178 Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by 2179 this change. (Derived from a suggestion by Arthur David Olson.) 2180 2181 Allow POSIX-like TZ strings where daylight saving time is in 2182 effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western 2183 Argentina Summer Time all year. This supports a more-compact way 2184 to represent the 2013d data for America/Argentina/San_Luis. 2185 Because of the change for San Luis noted above this change does not 2186 affect the current data. (Thanks to Andrew Main (Zefram) for 2187 suggestions that improved this change.) 2188 2189 Where these two TZ changes take effect, there is a minor extension 2190 to the tz file format in that it allows new values for the 2191 embedded TZ-format string, and the tz file format version number 2192 has therefore been increased from 2 to 3 as a precaution. 2193 Version-2-based client code should continue to work as before for 2194 all timestamps before 2038. Existing version-2-based client code 2195 (tzcode, GNU/Linux, Solaris) has been tested on version-3-format 2196 files, and typically works in practice even for timestamps after 2197 2037; the only known exception is America/Godthab. 2198 2199 Changes affecting timestamps before 1970 2200 2201 Pacific/Johnston is now a link to Pacific/Honolulu. This corrects 2202 some errors before 1947. 2203 2204 Some zones have been turned into links, when they differ from existing 2205 zones only in older data entries that were likely invented or that 2206 differ only in LMT or transitions from LMT. These changes affect 2207 only timestamps before 1943. The affected zones are: 2208 Africa/Juba, America/Anguilla, America/Aruba, America/Dominica, 2209 America/Grenada, America/Guadeloupe, America/Marigot, 2210 America/Montserrat, America/St_Barthelemy, America/St_Kitts, 2211 America/St_Lucia, America/St_Thomas, America/St_Vincent, 2212 America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for 2213 confirming that the old Europe/Vaduz zone was wrong and the new 2214 link is better for WWII-era times.) 2215 2216 Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects 2217 America/Cayman, America/Jamaica and America/Grand_Turk timestamps 2218 from 1890 to 1912. 2219 2220 Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46. 2221 This affects Europe/Zurich timestamps from 1853 to 1894. (Thanks 2222 to Alois Treindl). 2223 2224 Change the date of the circa-1850 Zurich transition from 1849-09-12 2225 to 1853-07-16, overriding Shanks with data from Messerli about 2226 postal and telegraph time in Switzerland. 2227 2228 Changes affecting time zone abbreviations before 1970 2229 2230 For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932, 2231 as Jakarta was called Batavia back then. 2232 2233 Changes affecting API 2234 2235 The 'zic' command now outputs a dummy transition when far-future 2236 data can't be summarized using a TZ string, and uses a 402-year 2237 window rather than a 400-year window. For the current data, this 2238 affects only the Asia/Tehran file. It does not affect any of the 2239 timestamps that this file represents, so zdump outputs the same 2240 information as before. (Thanks to Andrew Main (Zefram).) 2241 2242 The 'date' command has a new '-r' option, which lets you specify 2243 the integer time to display, a la FreeBSD. 2244 2245 The 'tzselect' command has two new options '-c' and '-n', which lets you 2246 select a zone based on latitude and longitude. 2247 2248 The 'zic' command's '-v' option now warns about constructs that 2249 require the new version-3 binary file format. (Thanks to Arthur 2250 David Olson for the suggestion.) 2251 2252 Support for floating-point time_t has been removed. 2253 It was always dicey, and POSIX no longer requires it. 2254 (Thanks to Eric Blake for suggesting to the POSIX committee to 2255 remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy 2256 Heninger, Arthur David Olson, and Alois Treindl, for reporting 2257 bugs and elucidating some of the corners of the old floating-point 2258 implementation.) 2259 2260 The signatures of 'offtime', 'timeoff', and 'gtime' have been 2261 changed back to the old practice of using 'long' to represent UT 2262 offsets. This had been inadvertently and mistakenly changed to 2263 'int_fast32_t'. (Thanks to Christos Zoulas.) 2264 2265 The code avoids undefined behavior on integer overflow in some 2266 more places, including gmtime, localtime, mktime and zdump. 2267 2268 Changes affecting the zdump utility 2269 2270 zdump now outputs "UT" when referring to Universal Time, not "UTC". 2271 "UTC" does not make sense for timestamps that predate the introduction 2272 of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen 2273 for clarifying UT vs UTC.) 2274 2275 Data changes affecting behavior of tzselect and similar programs 2276 2277 Country code BQ is now called the more-common name "Caribbean Netherlands" 2278 rather than the more-official "Bonaire, St Eustatius & Saba". 2279 2280 Remove from zone.tab the names America/Montreal, America/Shiprock, 2281 and Antarctica/South_Pole, as they are equivalent to existing 2282 same-country-code zones for post-1970 timestamps. The data entries for 2283 these names are unchanged, so the names continue to work as before. 2284 2285 Changes affecting code internals 2286 2287 zic -c now runs way faster on 64-bit hosts when given large numbers. 2288 2289 zic now uses vfprintf to avoid allocating and freeing some memory. 2290 2291 tzselect now computes the list of continents from the data, 2292 rather than have it hard-coded. 2293 2294 Minor changes pacify GCC 4.7.3 and GCC 4.8.1. 2295 2296 Changes affecting the build procedure 2297 2298 The 'leapseconds' file is now generated automatically from a 2299 new file 'leap-seconds.list', which is a copy of 2300 <ftp://ftp.nist.gov/pub/time/leap-seconds.list> 2301 A new source file 'leapseconds.awk' implements this. 2302 The goal is simplification of the future maintenance of 'leapseconds'. 2303 2304 When building the 'posix' or 'right' subdirectories, if the 2305 subdirectory would be a copy of the default subdirectory, it is 2306 now made a symbolic link if that is supported. This saves about 2307 2 MB of file system space. 2308 2309 The links America/Shiprock and Antarctica/South_Pole have been 2310 moved to the 'backward' file. This affects only nondefault builds 2311 that omit 'backward'. 2312 2313 Changes affecting version-control only 2314 2315 .gitignore now ignores 'date'. 2316 2317 Changes affecting documentation and commentary 2318 2319 Changes to the 'tzfile' man page 2320 2321 It now mentions that the binary file format may be extended in 2322 future versions by appending data. 2323 2324 It now refers to the 'zdump' and 'zic' man pages. 2325 2326 Changes to the 'zic' man page 2327 2328 It lists conditions that elicit a warning with '-v'. 2329 2330 It says that the behavior is unspecified when duplicate names 2331 are given, or if the source of one link is the target of another. 2332 2333 Its examples are updated to match the latest data. 2334 2335 The definition of white space has been clarified slightly. 2336 (Thanks to Michael Deckers.) 2337 2338 Changes to the 'Theory' file 2339 2340 There is a new section about the accuracy of the tz database, 2341 describing the many ways that errors can creep in, and 2342 explaining why so many of the pre-1970 timestamps are wrong or 2343 misleading (thanks to Steve Allen, Lester Caine, and Garrett 2344 Wollman for discussions that contributed to this). 2345 2346 The 'Theory' file describes LMT better (this follows a 2347 suggestion by Guy Harris). 2348 2349 It refers to the 2013 edition of POSIX rather than the 2004 edition. 2350 2351 It's mentioned that excluding 'backward' should not affect the 2352 other data, and it suggests at least one zone.tab name per 2353 inhabited country (thanks to Stephen Colebourne). 2354 2355 Some longstanding restrictions on names are documented, e.g., 2356 'America/New_York' precludes 'America/New_York/Bronx'. 2357 2358 It gives more reasons for the 1970 cutoff. 2359 2360 It now mentions which time_t variants are supported, such as 2361 signed integer time_t. (Thanks to Paul Goyette for reporting 2362 typos in an experimental version of this change.) 2363 2364 (Thanks to Philip Newton for correcting typos in these changes.) 2365 2366 Documentation and commentary is more careful to distinguish UT in 2367 general from UTC in particular. (Thanks to Steve Allen.) 2368 2369 Add a better source for the Zurich 1894 transition. 2370 (Thanks to Pierre-Yves Berger.) 2371 2372 Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.) 2373 2374 2375 Release 2013d - 2013-07-05 07:38:01 -0700 2376 2377 Changes affecting future timestamps: 2378 2379 Morocco's midsummer transitions this year are July 7 and August 10, 2380 not July 9 and August 8. (Thanks to Andrew Paprocki.) 2381 2382 Israel now falls back on the last Sunday of October. 2383 (Thanks to Ephraim Silverberg.) 2384 2385 Changes affecting past timestamps: 2386 2387 Specify Jerusalem's location more precisely; this changes the pre-1880 2388 times by 2 s. 2389 2390 Changing affecting metadata only: 2391 2392 Fix typos in the entries for country codes BQ and SX. 2393 2394 Changes affecting code: 2395 2396 Rework the code to fix a bug with handling Australia/Macquarie on 2397 32-bit hosts (thanks to Arthur David Olson). 2398 2399 Port to platforms like NetBSD, where time_t can be wider than long. 2400 2401 Add support for testing time_t types other than the system's. 2402 Run 'make check_time_t_alternatives' to try this out. 2403 Currently, the tests fail for unsigned time_t; 2404 this should get fixed at some point. 2405 2406 Changes affecting documentation and commentary: 2407 2408 Deemphasize the significance of national borders. 2409 2410 Update the zdump man page. 2411 2412 Remove obsolete NOID comment (thanks to Denis Excoffier). 2413 2414 Update several URLs and comments in the web pages. 2415 2416 Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler). 2417 2418 Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka). 2419 2420 2421 Release 2013c - 2013-04-19 16:17:40 -0700 2422 2423 Changes affecting current and future timestamps: 2424 2425 Palestine observed DST starting March 29, 2013. (Thanks to 2426 Steffen Thorsen.) From 2013 on, Gaza and Hebron both observe DST, 2427 with the predicted rules being the last Thursday in March at 24:00 2428 to the first Friday on or after September 21 at 01:00. 2429 2430 Assume that the recent change to Paraguay's DST rules is permanent, 2431 by moving the end of DST to the 4th Sunday in March every year. 2432 (Thanks to Carlos Ral Perasso.) 2433 2434 Changes affecting past timestamps: 2435 2436 Fix some historical data for Palestine to agree with that of 2437 timeanddate.com, as follows: 2438 2439 The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not 2440 00:00 Apr 1. 2441 2442 The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not 2443 02:00. 2444 2445 The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27. 2446 2447 The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2. 2448 2449 The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01. 2450 2451 The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00. 2452 2453 Fix times of habitation for Macquarie to agree with the Tasmania 2454 Parks & Wildlife Service history, which indicates that permanent 2455 habitation was 1899-1919 and 1948 on. 2456 2457 Changing affecting metadata only: 2458 2459 Macquarie Island is politically part of Australia, not Antarctica. 2460 (Thanks to Tobias Conradi.) 2461 2462 Sort Macquarie more-consistently with other parts of Australia. 2463 (Thanks to Tim Parenti.) 2464 2465 2466 Release 2013b - 2013-03-10 22:33:40 -0700 2467 2468 Changes affecting current and future timestamps: 2469 2470 Haiti uses US daylight-saving rules this year, and presumably future years. 2471 This changes timestamps starting today. (Thanks to Steffen Thorsen.) 2472 2473 Paraguay will end DST on March 24 this year. 2474 (Thanks to Steffen Thorsen.) For now, assume it's just this year. 2475 2476 Morocco does not observe DST during Ramadan; 2477 try to predict Ramadan in Morocco as best we can. 2478 (Thanks to Erik Homoet for the heads-up.) 2479 2480 Changes affecting commentary: 2481 2482 Update URLs in tz-link page. Add URLs for webOS, BB10, iOS. 2483 Update URL for Solaris. Mention Internet RFC 6557. 2484 Update Internet RFCs 2445->5545, 2822->5322. 2485 Switch from FTP to HTTP for Internet RFCs. 2486 2487 2488 Release 2013a - 2013-02-27 09:20:35 -0800 2489 2490 Change affecting binary data format: 2491 2492 The zone offset at the end of version-2-format zone files is now 2493 allowed to be 24:00, as per POSIX.1-2008. (Thanks to Arthur David Olson.) 2494 2495 Changes affecting current and future timestamps: 2496 2497 Chile's 2013 rules, and we guess rules for 2014 and later, will be 2498 the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC. 2499 (Thanks to Steffen Thorsen and Robert Elz.) 2500 2501 New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen. 2502 (Thanks to Tobias Conradi and Arthur David Olson.) 2503 2504 Many changes affect historical timestamps before 1940. 2505 These were deduced from: Milne J. Civil time. Geogr J. 1899 2506 Feb;13(2):173-94 <https://www.jstor.org/stable/1774359>. 2507 2508 Changes affecting the code: 2509 2510 Fix zic bug that mishandled Egypt's 2010 changes (this also affected 2511 the data). (Thanks to Arthur David Olson.) 2512 2513 Fix localtime bug when time_t is unsigned and data files were generated 2514 by a signed time_t system. (Thanks to Doug Bailey for reporting and 2515 to Arthur David Olson for fixing.) 2516 2517 Allow the email address for bug reports to be set by the packager. 2518 The default is tz (a] iana.org, as before. (Thanks to Joseph S. Myers.) 2519 2520 Update HTML checking to be compatible with Ubuntu 12.10. 2521 2522 Check that files are a safe subset of ASCII. At some point we may 2523 relax this requirement to a safe subset of UTF-8. Without the 2524 check, some non-UTF-8 encodings were leaking into the distribution. 2525 2526 Commentary changes: 2527 2528 Restore a comment about copyright notices that was inadvertently deleted. 2529 (Thanks to Arthur David Olson.) 2530 2531 Improve the commentary about which districts observe what times 2532 in Russia. (Thanks to Oscar van Vlijmen and Arthur David Olson). 2533 2534 Add web page links to tz.js. 2535 2536 Add "Run by the Monkeys" to tz-art. (Thanks to Arthur David Olson.) 2537 2538 2539 Release 2012j - 2012-11-12 18:34:49 -0800 2540 2541 Libya moved to CET this weekend, but with DST planned next year. 2542 (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.) 2543 2544 Signatures now have the extension .asc, not .sign, as that's more 2545 standard. (Thanks to Phil Pennock.) 2546 2547 The output of 'zdump --version', and of 'zic --version', now 2548 uses a format that is more typical for --version. 2549 (Thanks to Joseph S. Myers.) 2550 2551 The output of 'tzselect --help', 'zdump --help', and 'zic --help' 2552 now uses tz (a] iana.org rather than the old elsie address. 2553 2554 zic -v now complains about abbreviations that are less than 3 2555 or more than 6 characters, as per Posix. Formerly, it checked 2556 for abbreviations that were more than 3. 2557 2558 'make public' no longer puts its temporary directory under /tmp, 2559 and uses the just-built zic rather than the system zic. 2560 2561 Various fixes to documentation and commentary. 2562 2563 2564 Release 2012i - 2012-11-03 12:57:09 -0700 2565 2566 Cuba switches from DST tomorrow at 01:00. (Thanks to Steffen Thorsen.) 2567 2568 Linker flags can now be specified via LDFLAGS. 2569 AWK now defaults to 'awk', not 'nawk'. 2570 The shell in tzselect now defaults to /bin/bash, but this can 2571 be overridden by specifying KSHELL. 2572 The main web page now mentions the unofficial GitHub repository. 2573 (Thanks to Mike Frysinger.) 2574 2575 Tarball signatures can now be built by running 'make signatures'. 2576 There are also new makefile rules 'tarballs', 'check_public', and 2577 separate makefile rules for each tarball and signature file. 2578 A few makefile rules are now more portable to strict POSIX. 2579 2580 The main web page now lists the canonical IANA URL. 2581 2582 2583 Release 2012h - 2012-10-26 22:49:10 -0700 2584 2585 Bahia no longer has DST. (Thanks to Kelley Cook.) 2586 2587 Tocantins has DST. (Thanks to Rodrigo Severo.) 2588 2589 Israel has new DST rules next year. (Thanks to Ephraim Silverberg.) 2590 2591 Jordan stays on DST this winter. (Thanks to Steffen Thorsen.) 2592 2593 Web page updates. 2594 2595 More C modernization, except that at Arthur David Olson's suggestion 2596 the instances of 'register' were kept. 2597 2598 2599 Release 2012g - 2012-10-17 20:59:45 -0700 2600 2601 Samoa fall 2012 and later. (Thanks to Nicholas Pereira and Robert Elz.) 2602 2603 Palestine fall 2012. (Thanks to Steffen Thorsen.) 2604 2605 Assume C89. 2606 2607 To attack the version-number problem, this release ships the file 2608 'Makefile' (which contains the release number) in both the tzcode and 2609 the tzdata tarballs. The two Makefiles are identical, and should be 2610 identical in any matching pair of tarballs, so it shouldn't matter 2611 which order you extract the tarballs. Perhaps we can come up with a 2612 better version-number scheme at some point; this scheme does have the 2613 virtue of not adding more files. 2614 2615 2616 Release 2012f - 2012-09-12 23:17:03 -0700 2617 2618 * australasia (Pacific/Fiji): Fiji DST is October 21 through January 2619 20 this year. (Thanks to Steffen Thorsen.) 2620 2621 2622 Release 2012e - 2012-08-02 20:44:55 -0700 2623 2624 * australasia (Pacific/Fakaofo): Tokelau is UT +13, not +14. 2625 (Thanks to Steffen Thorsen.) 2626 2627 * Use a single version number for both code and data. 2628 2629 * .gitignore: New file. 2630 2631 * Remove trailing white space. 2632 2633 2634 Release code2012c-data2012d - 2012-07-19 16:35:33 -0700 2635 2636 Changes for Morocco's timestamps, which take effect in a couple of 2637 hours, along with infrastructure changes to accommodate how the tz 2638 code and data are released on IANA. 2639 2640 2641 Release data2012c - 2012-03-27 12:17:25 -0400 2642 2643 africa 2644 Summer time changes for Morocco (to start late April 2012) 2645 2646 asia 2647 Changes for 2012 for Gaza & the West Bank (Hebron) and Syria 2648 2649 northamerica 2650 Haiti following US/Canada rules for 2012 (and we're assuming, 2651 for now anyway, for the future). 2652 2653 2654 Release 2012b - 2012-03-02 12:29:15 +0700 2655 2656 There is just one change to tzcode2012b (compared with 2012a): 2657 the Makefile that was accidentally included with 2012a has been 2658 replaced with the version that should have been there, which is 2659 identical with the previous version (from tzcode2011i). 2660 2661 There are just two changes in tzdata2012b compared with 2012a. 2662 2663 Most significantly, summer time in Cuba has been delayed 3 weeks 2664 (now starts April 1 rather than March 11). Since Mar 11 (the old start 2665 date, as listed in 2012a) is just a little over a week away, this 2666 change is urgent. 2667 2668 Less importantly, an excess tab in one of the changes in zone.tab 2669 in 2012a has been removed. 2670 2671 2672 Release 2012a - 2012-03-01 18:28:10 +0700 2673 2674 The changes in tzcode2012a (compared to the previous version, 2011i) 2675 are entirely to the README and tz-art.htm and tz-link.htm files, if 2676 none of those concern you, you can ignore the code update. The changes 2677 reflect the changed addresses for the mailing list and the code and 2678 data distribution points & methods (and a link to DateTime::TimeZone::Tzfile 2679 has been added to tz-link.htm). 2680 2681 In tzdata2012a (compared to the previous release, which was 2011n) 2682 the major changes are: 2683 Chile 2011/2012 and 2012/2013 summer time date adjustments. 2684 Falkland Islands onto permanent summer time (we're assuming for the 2685 foreseeable future, though 2012 is all we're fairly certain of.) 2686 Armenia has abolished Summer Time. 2687 Tokelau jumped the International Date Line back last December 2688 (just the same as their near neighbour, Samoa). 2689 America/Creston is a new zone for a small area of British Columbia 2690 There will be a leapsecond 2012-06-30 23:59:60 UTC. 2691 2692 Other minor changes are: 2693 Corrections to 1918 Canadian summer time end dates. 2694 Updated URL for UK time zone history (in comments) 2695 A few typos in Le Corre's list of free French place names (comments) 2696 2697 2698 Release data2011n - 2011-10-30 14:57:54 +0700 2699 2700 There are three changes of note - most urgently, Cuba (America/Havana) 2701 has extended summer time by two weeks, now to end on Nov 13, rather than 2702 the (already past) Oct 30. Second, the Pridnestrovian Moldavian Republic 2703 (Europe/Tiraspol) decided not to split from the rest of Moldova after 2704 all, and consequently that zone has been removed (again) and reinstated 2705 in the "backward" file as a link to Europe/Chisinau. And third, the 2706 end date for Fiji's summer time this summer was moved forward from the 2707 earlier planned Feb 26, to Jan 22. 2708 2709 Apart from that, Moldova (MD) returns to a single entry in zone.tab 2710 (and the incorrect syntax that was in the 2011m version of that file 2711 is so fixed - it would have been fixed in a different way had this 2712 change not happened - that's the "missing" sccs version id). 2713 2714 2715 Release data2011m - 2011-10-24 21:42:16 +0700 2716 2717 In particular, the typos in comments in the data (2011-11-17 should have 2718 been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that 2719 Tim Parenti noted) have been fixed, and the change for Ukraine has been 2720 made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to 2721 Tim Parenti, and also Denys Gavrysh) 2722 2723 In addition, I added Europe/Tiraspol to zone.tab. 2724 2725 This time, all the files have new version numbers... (including the files 2726 otherwise unchanged in 2011m that were changed in 2011l but didn't get new 2727 version numbers there...) 2728 2729 2730 Release data2011l - 2011-10-10 11:15:43 +0700 2731 2732 There are just 2 changes that cause different generated tzdata files from 2733 zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil 2734 is included, but commented out. Compared with the diff I sent out last week, 2735 this version also includes attributions for the sources for the changes 2736 (in much the same format as ado used, but the html tags have not been 2737 checked, verified, or used in any way at all, so if there are errors there, 2738 please let me know.) 2739 2740 2741 Release data2011k - 2011-09-20 17:54:03 -0400 2742 2743 [not summarized] 2744 2745 2746 Release data2011j - 2011-09-12 09:22:49 -0400 2747 2748 (contemporary changes for Samoa; past changes for Kenya, Uganda, and 2749 Tanzania); there are also two spelling corrections to comments in 2750 the australasia file (with thanks to Christos Zoulas). 2751 2752 2753 Release 2011i - 2011-08-29 05:56:32 -0400 2754 2755 [not summarized] 2756 2757 2758 Release data2011h - 2011-06-15 18:41:48 -0400 2759 2760 Russia and Curaao changes 2761 2762 2763 Release 2011g - 2011-04-25 09:07:22 -0400 2764 2765 update the rules for Egypt to reflect its abandonment of DST this year 2766 2767 2768 Release 2011f - 2011-04-06 17:14:53 -0400 2769 2770 [not summarized] 2771 2772 2773 Release 2011e - 2011-03-31 16:04:38 -0400 2774 2775 Morocco, Chile, and tz-link changes 2776 2777 2778 Release 2011d - 2011-03-14 09:18:01 -0400 2779 2780 changes that impact present-day timestamps in Cuba, Samoa, and Turkey 2781 2782 2783 Release 2011c - 2011-03-07 09:30:09 -0500 2784 2785 These do affect current timestamps in Chile and Annette Island, Canada. 2786 2787 2788 Release 2011b - 2011-02-07 08:44:50 -0500 2789 2790 [not summarized] 2791 2792 2793 Release 2011a - 2011-01-24 10:30:16 -0500 2794 2795 [not summarized] 2796 2797 2798 Release data2010o - 2010-11-01 09:18:23 -0400 2799 2800 change to the end of DST in Fiji in 2011 2801 2802 2803 Release 2010n - 2010-10-25 08:19:17 -0400 2804 2805 [not summarized] 2806 2807 2808 Release 2010m - 2010-09-27 09:24:48 -0400 2809 2810 Hong Kong, Vostok, and zic.c changes 2811 2812 2813 Release 2010l - 2010-08-16 06:57:25 -0400 2814 2815 [not summarized] 2816 2817 2818 Release 2010k - 2010-07-26 10:42:27 -0400 2819 2820 [not summarized] 2821 2822 2823 Release 2010j - 2010-05-10 09:07:48 -0400 2824 2825 changes for Baha de Banderas and for version naming 2826 2827 2828 Release data2010i - 2010-04-16 18:50:45 -0400 2829 2830 the end of DST in Morocco on 2010-08-08 2831 2832 2833 Release data2010h - 2010-04-05 09:58:56 -0400 2834 2835 [not summarized] 2836 2837 2838 Release data2010g - 2010-03-24 11:14:53 -0400 2839 2840 [not summarized] 2841 2842 2843 Release 2010f - 2010-03-22 09:45:46 -0400 2844 2845 [not summarized] 2846 2847 2848 Release data2010e - 2010-03-08 14:24:27 -0500 2849 2850 corrects the Dhaka bug found by Danvin Ruangchan 2851 2852 2853 Release data2010d - 2010-03-06 07:26:01 -0500 2854 2855 [not summarized] 2856 2857 2858 Release 2010c - 2010-03-01 09:20:58 -0500 2859 2860 changes including KRE's suggestion for earlier initialization of 2861 "goahead" and "goback" structure elements 2862 2863 2864 Release code2010a - 2010-02-16 10:40:04 -0500 2865 2866 [not summarized] 2867 2868 2869 Release data2010b - 2010-01-20 12:37:01 -0500 2870 2871 Mexico changes 2872 2873 2874 Release data2010a - 2010-01-18 08:30:04 -0500 2875 2876 changes to Dhaka 2877 2878 2879 Release data2009u - 2009-12-26 08:32:28 -0500 2880 2881 changes to DST in Bangladesh 2882 2883 2884 Release 2009t - 2009-12-21 13:24:27 -0500 2885 2886 [not summarized] 2887 2888 2889 Release data2009s - 2009-11-14 10:26:32 -0500 2890 2891 (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change 2892 2893 2894 Release 2009r - 2009-11-09 10:10:31 -0500 2895 2896 "antarctica" and "tz-link.htm" changes 2897 2898 2899 Release 2009q - 2009-11-02 09:12:40 -0500 2900 2901 with two corrections as reported by Eric Muller and Philip Newton 2902 2903 2904 Release data2009p - 2009-10-23 15:05:27 -0400 2905 2906 Argentina (including San Luis) changes (with the correction from 2907 Mariano Absatz) 2908 2909 2910 Release data2009o - 2009-10-14 16:49:38 -0400 2911 2912 Samoa (commentary only), Pakistan, and Bangladesh changes 2913 2914 2915 Release data2009n - 2009-09-22 15:13:38 -0400 2916 2917 added commentary for Argentina and a change to the end of DST in 2918 2009 in Pakistan 2919 2920 2921 Release data2009m - 2009-09-03 10:23:43 -0400 2922 2923 Samoa and Palestine changes 2924 2925 2926 Release data2009l - 2009-08-14 09:13:07 -0400 2927 2928 Samoa (comments only) and Egypt 2929 2930 2931 Release 2009k - 2009-07-20 09:46:08 -0400 2932 2933 [not summarized] 2934 2935 2936 Release data2009j - 2009-06-15 06:43:59 -0400 2937 2938 Bangladesh change (with a short turnaround since the DST change is 2939 impending) 2940 2941 2942 Release 2009i - 2009-06-08 09:21:22 -0400 2943 2944 updating for DST in Bangladesh this year 2945 2946 2947 Release 2009h - 2009-05-26 09:19:14 -0400 2948 2949 [not summarized] 2950 2951 2952 Release data2009g - 2009-04-20 16:34:07 -0400 2953 2954 Cairo 2955 2956 2957 Release data2009f - 2009-04-10 11:00:52 -0400 2958 2959 correct DST in Pakistan 2960 2961 2962 Release 2009e - 2009-04-06 09:08:11 -0400 2963 2964 [not summarized] 2965 2966 2967 Release 2009d - 2009-03-23 09:38:12 -0400 2968 2969 Morocco, Tunisia, Argentina, and American Astronomical Society changes 2970 2971 2972 Release data2009c - 2009-03-16 09:47:51 -0400 2973 2974 change to the start of Cuban DST 2975 2976 2977 Release 2009b - 2009-02-09 11:15:22 -0500 2978 2979 [not summarized] 2980 2981 2982 Release 2009a - 2009-01-21 10:09:39 -0500 2983 2984 [not summarized] 2985 2986 2987 Release data2008i - 2008-10-21 12:10:25 -0400 2988 2989 southamerica and zone.tab files, with Argentina DST rule changes and 2990 United States zone reordering and recommenting 2991 2992 2993 Release 2008h - 2008-10-13 07:33:56 -0400 2994 2995 [not summarized] 2996 2997 2998 Release 2008g - 2008-10-06 09:03:18 -0400 2999 3000 Fix a broken HTML anchor and update Brazil's DST transitions; 3001 there's also a slight reordering of information in tz-art.htm. 3002 3003 3004 Release data2008f - 2008-09-09 22:33:26 -0400 3005 3006 [not summarized] 3007 3008 3009 Release 2008e - 2008-07-28 14:11:17 -0400 3010 3011 changes by Arthur David Olson and Jesper Nrgaard Welen 3012 3013 3014 Release data2008d - 2008-07-07 09:51:38 -0400 3015 3016 changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo 3017 3018 3019 Release data2008c - 2008-05-19 17:48:03 -0400 3020 3021 Pakistan, Morocco, and Mongolia 3022 3023 3024 Release data2008b - 2008-03-24 08:30:59 -0400 3025 3026 including renaming Asia/Calcutta to Asia/Kolkata, with a backward 3027 link provided 3028 3029 3030 Release 2008a - 2008-03-08 05:42:16 -0500 3031 3032 [not summarized] 3033 3034 3035 Release 2007k - 2007-12-31 10:25:22 -0500 3036 3037 most importantly, changes to the "southamerica" file based on 3038 Argentina's readoption of daylight saving time 3039 3040 3041 Release 2007j - 2007-12-03 09:51:01 -0500 3042 3043 1. eliminate the "P" (parameter) macro; 3044 3045 2. the "noncontroversial" changes circulated on the time zone 3046 mailing list (less the changes to "logwtmp.c"); 3047 3048 3. eliminate "too many transition" errors when "min" is used in time 3049 zone rules; 3050 3051 4. changes by Paul Eggert (including updated information for Venezuela). 3052 3053 3054 Release data2007i - 2007-10-30 10:28:11 -0400 3055 3056 changes for Cuba and Syria 3057 3058 3059 Release 2007h - 2007-10-01 10:05:51 -0400 3060 3061 changes by Paul Eggert, as well as an updated link to the ICU 3062 project in tz-link.htm 3063 3064 3065 Release 2007g - 2007-08-20 10:47:59 -0400 3066 3067 changes by Paul Eggert 3068 3069 The "leapseconds" file has been updated to incorporate the most 3070 recent International Earth Rotation and Reference Systems Service 3071 (IERS) bulletin. 3072 3073 There's an addition to tz-art.htm regarding the television show "Medium". 3074 3075 3076 Release 2007f - 2007-05-07 10:46:46 -0400 3077 3078 changes by Paul Eggert (including Haiti, Turks and Caicos, and New 3079 Zealand) 3080 3081 changes to zic.c to allow hour values greater than 24 (along with 3082 Paul's improved time value overflow checking) 3083 3084 3085 Release 2007e - 2007-04-02 10:11:52 -0400 3086 3087 Syria and Honduras changes by Paul Eggert 3088 3089 zic.c variable renaming changes by Arthur David Olson 3090 3091 3092 Release 2007d - 2007-03-20 08:48:30 -0400 3093 3094 changes by Paul Eggert 3095 3096 the elimination of white space at the ends of lines 3097 3098 3099 Release 2007c - 2007-02-26 09:09:37 -0500 3100 3101 changes by Paul Eggert 3102 3103 3104 Release 2007b - 2007-02-12 09:34:20 -0500 3105 3106 Paul Eggert's proposed change to the quotation handling logic in zic.c. 3107 3108 changes to the commentary in "leapseconds" reflecting the IERS 3109 announcement that there is to be no positive leap second at the end 3110 of June 2007. 3111 3112 3113 Release 2007a - 2007-01-08 12:28:29 -0500 3114 3115 changes by Paul Eggert 3116 3117 Derick Rethan's Asmara change 3118 3119 Oscar van Vlijmen's Easter Island local mean time change 3120 3121 symbolic link changes 3122 3123 3124 Release 2006p - 2006-11-27 08:54:27 -0500 3125 3126 changes by Paul Eggert 3127 3128 3129 Release 2006o - 2006-11-06 09:18:07 -0500 3130 3131 changes by Paul Eggert 3132 3133 3134 Release 2006n - 2006-10-10 11:32:06 -0400 3135 3136 changes by Paul Eggert 3137 3138 3139 Release 2006m - 2006-10-02 15:32:35 -0400 3140 3141 changes for Uruguay, Palestine, and Egypt by Paul Eggert 3142 3143 (minimalist) changes to zic.8 to clarify "until" information 3144 3145 3146 Release data2006l - 2006-09-18 12:58:11 -0400 3147 3148 Paul's best-effort work on this coming weekend's Egypt time change 3149 3150 3151 Release 2006k - 2006-08-28 12:19:09 -0400 3152 3153 changes by Paul Eggert 3154 3155 3156 Release 2006j - 2006-08-21 09:56:32 -0400 3157 3158 changes by Paul Eggert 3159 3160 3161 Release code2006i - 2006-08-07 12:30:55 -0400 3162 3163 localtime.c fixes 3164 3165 Ken Pizzini's conversion script 3166 3167 3168 Release code2006h - 2006-07-24 09:19:37 -0400 3169 3170 adds public domain notices to four files 3171 3172 includes a fix for transition times being off by a second 3173 3174 adds a new recording to the "arts" file (information courtesy Colin Bowern) 3175 3176 3177 Release 2006g - 2006-05-08 17:18:09 -0400 3178 3179 northamerica changes by Paul Eggert 3180 3181 3182 Release 2006f - 2006-05-01 11:46:00 -0400 3183 3184 a missing version number problem is fixed (with thanks to Bradley 3185 White for catching the problem) 3186 3187 3188 Release 2006d - 2006-04-17 14:33:43 -0400 3189 3190 changes by Paul Eggert 3191 3192 added new items to tz-arts.htm that were found by Paul 3193 3194 3195 Release 2006c - 2006-04-03 10:09:32 -0400 3196 3197 two sets of data changes by Paul Eggert 3198 3199 a fencepost error fix in zic.c 3200 3201 changes to zic.c and the "europe" file to minimize differences 3202 between output produced by the old 32-bit zic and the new 64-bit 3203 version 3204 3205 3206 Release 2006b - 2006-02-20 10:08:18 -0500 3207 [tz32code2006b + tz64code2006b + tzdata2006b] 3208 3209 64-bit code 3210 3211 All SCCS IDs were bumped to "8.1" for this release. 3212 3213 3214 Release 2006a - 2006-01-30 08:59:31 -0500 3215 3216 changes by Paul Eggert (in particular, Indiana time zone moves) 3217 3218 an addition to the zic manual page to describe how special-case 3219 transitions are handled 3220 3221 3222 Release 2005r - 2005-12-27 09:27:13 -0500 3223 3224 Canadian changes by Paul Eggert 3225 3226 They also add "<pre>" directives to time zone data files and reflect 3227 changes to warning message logic in "zdump.c" (but with calls to 3228 "gettext" kept unbundled at the suggestion of Ken Pizzini). 3229 3230 3231 Release 2005q - 2005-12-13 09:17:09 -0500 3232 3233 Nothing earth-shaking here: 3234 1. Electronic mail addresses have been removed. 3235 2. Casts of the return value of exit have been removed. 3236 3. Casts of the argument of is.* macros have been added. 3237 4. Indentation in one section of zic.c has been fixed. 3238 5. References to dead URLs in the data files have been dealt with. 3239 3240 3241 Release 2005p - 2005-12-05 10:30:53 -0500 3242 3243 "systemv", "tz-link.htm", and "zdump.c" changes 3244 (less the casts of arguments to the is* macros) 3245 3246 3247 Release 2005o - 2005-11-28 10:55:26 -0500 3248 3249 Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert 3250 3251 zdump.c lint fixes by Arthur David Olson 3252 3253 3254 Release 2005n - 2005-10-03 09:44:09 -0400 3255 3256 changes by Paul Eggert (both the Uruguay changes and the Kyrgyzstan 3257 et al. changes) 3258 3259 3260 Release 2005m - 2005-08-29 12:15:40 -0400 3261 3262 changes by Paul Eggert (with a small tweak to the tz-art change) 3263 3264 a declaration of an unused variable has been removed from zdump.c 3265 3266 3267 Release 2005l - 2005-08-22 12:06:39 -0400 3268 3269 changes by Paul Eggert 3270 3271 overflow/underflow checks by Arthur David Olson, minus changes to 3272 the "Theory" file about the pending addition of 64-bit data (I grow 3273 less confident of the changes being accepted with each passing day, 3274 and the changes no longer increase the data files nine-fold--there's 3275 less than a doubling in size by my local Sun's reckoning) 3276 3277 3278 Release 2005k - 2005-07-14 14:14:24 -0400 3279 3280 The "leapseconds" file has been edited to reflect the recently 3281 announced leap second at the end of 2005. 3282 3283 I've also deleted electronic mail addresses from the files as an 3284 anti-spam measure. 3285 3286 3287 Release 2005j - 2005-06-13 14:34:13 -0400 3288 3289 These reflect changes to limit the length of time zone abbreviations 3290 and the characters used in those abbreviations. 3291 3292 There are also changes to handle POSIX-style "quoted" time zone 3293 environment variables. 3294 3295 The changes were circulated on the time zone mailing list; the only 3296 change since then was the removal of a couple of minimum-length of 3297 abbreviation checks. 3298 3299 3300 Release data2005i - 2005-04-21 15:04:16 -0400 3301 3302 changes (most importantly to Nicaragua and Haiti) by Paul Eggert 3303 3304 3305 Release 2005h - 2005-04-04 11:24:47 -0400 3306 3307 changes by Paul Eggert 3308 3309 minor changes to Makefile and zdump.c to produce more useful output 3310 when doing a "make typecheck" 3311 3312 3313 Release 2005g - 2005-03-14 10:11:21 -0500 3314 3315 changes by Paul Eggert (a change to current DST rules in Uruguay and 3316 an update to a link to time zone software) 3317 3318 3319 Release 2005f - 2005-03-01 08:45:32 -0500 3320 3321 data and documentation changes by Paul Eggert 3322 3323 3324 Release 2005e - 2005-02-10 15:59:44 -0500 3325 3326 [not summarized] 3327 3328 3329 Release code2005d - 2005-01-31 09:21:47 -0500 3330 3331 make zic complain about links to links if the -v flag is used 3332 3333 have "make public" do more code checking 3334 3335 add an include to "localtime.c" for the benefit of gcc systems 3336 3337 3338 Release 2005c - 2005-01-17 18:36:29 -0500 3339 3340 get better results when mktime runs on a system where time_t is double 3341 3342 changes to the data files (most importantly to Paraguay) 3343 3344 3345 Release 2005b - 2005-01-10 09:19:54 -0500 3346 3347 Get localtime and gmtime working on systems with exotic time_t types. 3348 3349 Update the leap second commentary in the "leapseconds" file. 3350 3351 3352 Release 2005a - 2005-01-01 13:13:44 -0500 3353 3354 [not summarized] 3355 3356 3357 Release code2004i - 2004-12-14 13:42:58 -0500 3358 3359 Deal with systems where time_t is unsigned. 3360 3361 3362 Release code2004h - 2004-12-07 11:40:18 -0500 3363 3364 64-bit-time_t changes 3365 3366 3367 Release 2004g - 2004-11-02 09:06:01 -0500 3368 3369 update to Cuba (taking effect this weekend) 3370 3371 other changes by Paul Eggert 3372 3373 correction of the spelling of Oslo 3374 3375 changed versions of difftime.c and private.h 3376 3377 3378 Release code2004f - 2004-10-21 10:25:22 -0400 3379 3380 Cope with wide-ranging tm_year values. 3381 3382 3383 Release 2004e - 2004-10-11 14:47:21 -0400 3384 3385 Brazil/Argentina/Israel changes by Paul Eggert 3386 3387 changes to tz-link.htm by Paul 3388 3389 one small fix to Makefile 3390 3391 3392 Release 2004d - 2004-09-22 08:27:29 -0400 3393 3394 Avoid overflow problems when TM_YEAR_BASE is added to an integer. 3395 3396 3397 Release 2004c - 2004-08-11 12:06:26 -0400 3398 3399 asctime-related changes 3400 3401 (variants of) some of the documentation changes suggested by Paul Eggert 3402 3403 3404 Release 2004b - 2004-07-19 14:33:35 -0400 3405 3406 data changes by Paul Eggert - most importantly, updates for Argentina 3407 3408 3409 Release 2004a - 2004-05-27 12:00:47 -0400 3410 3411 changes by Paul Eggert 3412 3413 Handle DST transitions that occur at the end of a month in some 3414 years but at the start of the following month in other years. 3415 3416 Add a copy of the correspondence that's the basis for claims about 3417 DST in the Navajo Nation. 3418 3419 3420 Release 2003e - 2003-12-15 09:36:47 -0500 3421 3422 changes by Arthur David Olson (primarily code changes) 3423 3424 changes by Paul Eggert (primarily data changes) 3425 3426 minor changes to "Makefile" and "northamerica" (in the latter case, 3427 optimization of the "Toronto" rules) 3428 3429 3430 Release 2003d - 2003-10-06 09:34:44 -0400 3431 3432 changes by Paul Eggert 3433 3434 3435 Release 2003c - 2003-09-16 10:47:05 -0400 3436 3437 Fix bad returns in zic.c's inleap function. 3438 Thanks to Bradley White for catching the problem! 3439 3440 3441 Release 2003b - 2003-09-16 07:13:44 -0400 3442 3443 Add a "--version" option (and documentation) to the zic and zdump commands. 3444 3445 changes to overflow/underflow checking in zic 3446 3447 a localtime typo fix. 3448 3449 Update the leapseconds and tz-art.htm files. 3450 3451 3452 Release 2003a - 2003-03-24 09:30:54 -0500 3453 3454 changes by Paul Eggert 3455 3456 a few additions and modifications to the tz-art.htm file 3457 3458 3459 Release 2002d - 2002-10-15 13:12:42 -0400 3460 3461 changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab 3462 3463 There's also a new time zone quote in "tz-art.htm". 3464 3465 3466 Release 2002c - 2002-04-04 11:55:20 -0500 3467 3468 changes by Paul Eggert 3469 3470 Change zic.c to avoid creating symlinks to files that don't exist. 3471 3472 3473 Release 2002b - 2002-01-28 12:56:03 -0500 3474 3475 [These change notes are for Release 2002a, which was corrupted. 3476 2002b was a corrected version of 2002a.] 3477 3478 changes by Paul Eggert 3479 3480 Update the "leapseconds" file to note that there'll be no leap 3481 second at the end of June, 2002. 3482 3483 Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone. 3484 3485 Change to "difftime.c" to avoid sizeof problems. 3486 3487 3488 Release 2001d - 2001-10-09 13:31:32 -0400 3489 3490 changes by Paul Eggert 3491 3492 3493 Release 2001c - 2001-06-05 13:59:55 -0400 3494 3495 changes by Paul Eggert and Andrew Brown 3496 3497 3498 Release 2001b - 2001-04-05 16:44:38 -0400 3499 3500 changes by Paul Eggert (modulo jnorgard's typo fix) 3501 3502 tz-art.htm has been HTMLified. 3503 3504 3505 Release 2001a - 2001-03-13 12:57:44 -0500 3506 3507 changes by Paul Eggert 3508 3509 An addition to the "leapseconds" file: comments with the text of the 3510 latest IERS leap second notice. 3511 3512 Trailing white space has been removed from data file lines, and 3513 repeated spaces in "Rule Jordan" lines in the "asia" file have been 3514 converted to tabs. 3515 3516 3517 Release 2000h - 2000-12-14 15:33:38 -0500 3518 3519 changes by Paul Eggert 3520 3521 one typo fix in the "art" file 3522 3523 With providence, this is the last update of the millennium. 3524 3525 3526 Release 2000g - 2000-10-10 11:35:22 -0400 3527 3528 changes by Paul Eggert 3529 3530 correction of John Mackin's name submitted by Robert Elz 3531 3532 Garry Shandling's Daylight Saving Time joke (!?!) from the recent 3533 Emmy Awards broadcast. 3534 3535 3536 Release 2000f - 2000-08-10 09:31:58 -0400 3537 3538 changes by Paul Eggert 3539 3540 Added information in "tz-art.htm" on a Seinfeld reference to DST. 3541 3542 Error checking and messages in the "yearistype" script have been 3543 improved. 3544 3545 3546 Release 2000e - 2000-07-31 09:27:54 -0400 3547 3548 data changes by Paul Eggert 3549 3550 a change to the default value of the defined constant HAVE_STRERROR 3551 3552 the addition of a Dave Barry quote on DST to the tz-arts file 3553 3554 3555 Release 2000d - 2000-04-20 15:43:04 -0400 3556 3557 changes to the documentation and code of strftime for C99 conformance 3558 3559 a bug fix for date.c 3560 3561 These are based on (though modified from) changes by Paul Eggert. 3562 3563 3564 Release 2000c - 2000-03-04 10:31:43 -0500 3565 3566 changes by Paul Eggert 3567 3568 3569 Release 2000b - 2000-02-21 12:16:29 -0500 3570 3571 changes by Paul Eggert and Joseph Myers 3572 3573 modest tweaks to the tz-art.htm and tz-link.htm files 3574 3575 3576 Release 2000a - 2000-01-18 09:21:26 -0500 3577 3578 changes by Paul Eggert 3579 3580 The two hypertext documents have also been renamed. 3581 3582 3583 Release code1999i-data1999j - 1999-11-15 18:43:22 -0500 3584 3585 Paul Eggert's changes 3586 3587 additions to the "zic" manual page and the "Arts.htm" file 3588 3589 3590 Release code1999h-data1999i - 1999-11-08 14:55:21 -0500 3591 3592 [not summarized] 3593 3594 3595 Release data1999h - 1999-10-07 03:50:29 -0400 3596 3597 changes by Paul Eggert to "europe" (most importantly, fixing 3598 Lithuania and Estonia) 3599 3600 3601 Release 1999g - 1999-09-28 11:06:18 -0400 3602 3603 data changes by Paul Eggert (most importantly, the change for 3604 Lebanon that buys correctness for this coming Sunday) 3605 3606 The "code" file contains changes to "Makefile" and "checktab.awk" to 3607 allow better checking of time zone files before they are published. 3608 3609 3610 Release 1999f - 1999-09-23 09:48:14 -0400 3611 3612 changes by Arthur David Olson and Paul Eggert 3613 3614 3615 Release 1999e - 1999-08-17 15:20:54 -0400 3616 3617 changes circulated by Paul Eggert, although the change to handling 3618 of DST-specifying time zone names has been commented out for now 3619 (search for "XXX" in "localtime.c" for details). These files also 3620 do not make any changes to the start of DST in Brazil. 3621 3622 In addition to Paul's changes, there are updates to "Arts.htm" and 3623 cleanups of URLs. 3624 3625 3626 Release 1999d - 1999-03-30 11:31:07 -0500 3627 3628 changes by Paul Eggert 3629 3630 The Makefile's "make public" rule has also been changed to do a test 3631 compile of each individual time zone data file (which should help 3632 avoid problems such as the one we had with Nicosia). 3633 3634 3635 Release 1999c - 1999-03-25 09:47:47 -0500 3636 3637 changes by Paul Eggert, most importantly the change for Chile. 3638 3639 3640 Release 1999b - 1999-02-01 17:51:44 -0500 3641 3642 changes by Paul Eggert 3643 3644 code changes (suggested by Mani Varadarajan, mani at be.com) for 3645 correct handling of symbolic links when building using a relative directory 3646 3647 code changes to generate correct messages for failed links 3648 3649 updates to the URLs in Arts.htm 3650 3651 3652 Release 1999a - 1999-01-19 16:20:29 -0500 3653 3654 error message internationalizations and corrections in zic.c and 3655 zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz, 3656 to whom thanks!) 3657 3658 3659 Release code1998h-data1998i - 1998-10-01 09:56:10 -0400 3660 3661 changes for Brazil, Chile, and Germany 3662 3663 support for use of "24:00" in the input files for the time zone compiler 3664 3665 3666 Release code1998g-data1998h - 1998-09-24 10:50:28 -0400 3667 3668 changes by Paul Eggert 3669 3670 correction to a define in the "private.h" file 3671 3672 3673 Release data1998g - 1998-08-11 03:28:35 -0000 3674 [tzdata1998g.tar.gz is missing!] 3675 3676 Lithuanian change provided by mgedmin at pub.osf.it 3677 3678 Move creation of the GMT link with Etc/GMT to "etcetera" (from 3679 "backward") to ensure that the GMT file is created even where folks 3680 don't want the "backward" links (as suggested by Paul Eggert). 3681 3682 3683 Release data1998f - 1998-07-20 13:50:00 -0000 3684 [tzdata1998f.tar.gz is missing!] 3685 3686 Update the "leapseconds" file to include the newly-announced 3687 insertion at the end of 1998. 3688 3689 3690 Release code1998f - 1998-06-01 10:18:31 -0400 3691 3692 addition to localtime.c by Guy Harris 3693 3694 3695 Release 1998e - 1998-05-28 09:56:26 -0400 3696 3697 The Makefile is changed to produce zoneinfo-posix rather than 3698 zoneinfo/posix, and to produce zoneinfo-leaps rather than 3699 zoneinfo/right. 3700 3701 data changes by Paul Eggert 3702 3703 changes from Guy Harris to provide asctime_r and ctime_r 3704 3705 A usno1998 file (substantially identical to usno1997) has been added. 3706 3707 3708 Release 1998d - 1998-05-14 11:58:34 -0400 3709 3710 changes to comments (in particular, elimination of references to CIA maps). 3711 "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places 3712 where changes occur. 3713 3714 3715 Release 1998c - 1998-02-28 12:32:26 -0500 3716 3717 changes by Paul Eggert (save the "French correction," on which I'll 3718 wait for the dust to settle) 3719 3720 symlink changes 3721 3722 changes and additions to Arts.htm 3723 3724 3725 Release 1998b - 1998-01-17 14:31:51 -0500 3726 3727 URL cleanups and additions 3728 3729 3730 Release 1998a - 1998-01-13 12:37:35 -0500 3731 3732 changes by Paul Eggert 3733 3734 3735 Release code1997i-data1997k - 1997-12-29 09:53:41 -0500 3736 3737 changes by Paul Eggert, with minor modifications from Arthur David 3738 Olson to make the files more browser friendly 3739 3740 3741 Release code1997h-data1997j - 1997-12-18 17:47:35 -0500 3742 3743 minor changes to put "TZif" at the start of each time zone information file 3744 3745 a rule has also been added to the Makefile so you can 3746 make zones 3747 to just recompile the zone information files (rather than doing a 3748 full "make install" with its other effects). 3749 3750 3751 Release data1997i - 1997-10-07 08:45:38 -0400 3752 3753 changes to Africa by Paul Eggert 3754 3755 3756 Release code1997g-data1997h - 1997-09-04 16:56:54 -0400 3757 3758 corrections for Uruguay (and other locations) 3759 3760 Arthur David Olson's simple-minded fix allowing mktime to both 3761 correctly handle leap seconds and correctly handle tm_sec values 3762 upon which arithmetic has been performed. 3763 3764 3765 Release code1997f-data1997g - 1997-07-19 13:15:02 -0400 3766 3767 Paul Eggert's updates 3768 3769 a small change to a function prototype; 3770 3771 "Music" has been renamed "Arts.htm", HTMLified, and augmented to 3772 include information on Around the World in Eighty Days. 3773 3774 3775 Release code1997e-data1997f - 1997-05-03 18:52:34 -0400 3776 3777 fixes to zic's error handling 3778 3779 changes inspired by the item circulated on Slovenia 3780 3781 The description of Web resources has been HTMLified for browsing 3782 convenience. 3783 3784 A new piece of tz-related music has been added to the "Music" file. 3785 3786 3787 Release code1997d-data1997e - 1997-03-29 12:48:52 -0500 3788 3789 Paul Eggert's latest suggestions 3790 3791 3792 Release code1997c-data1997d - 1997-03-07 20:37:54 -0500 3793 3794 changes to "zic.c" to correct performance of the "-s" option 3795 3796 a new file "usno1997" 3797 3798 3799 Release data1997c - 1997-03-04 09:58:18 -0500 3800 3801 changes in Israel 3802 3803 3804 Release 1997b - 1997-02-27 18:34:19 -0500 3805 3806 The data file incorporates the 1997 leap second. 3807 3808 The code file incorporates Arthur David Olson's take on the 3809 zic/multiprocessor/directory-creation situation. 3810 3811 3812 Release 1997a - 1997-01-21 09:11:10 -0500 3813 3814 Paul Eggert's Antarctica (and other changes) 3815 3816 Arthur David Olson finessed the "getopt" issue by checking against 3817 both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1 3818 is returned while SunOS 5.5's manual says EOF is returned). 3819 3820 3821 Release code1996o-data1996n - 1996-12-27 21:42:05 -0500 3822 3823 Paul Eggert's latest changes 3824 3825 3826 Release code1996n - 1996-12-16 09:42:02 -0500 3827 3828 link snapping fix from Bruce Evans (via Garrett Wollman) 3829 3830 3831 Release data1996m - 1996-11-24 02:37:34 -0000 3832 [tzdata1996m.tar.gz is missing!] 3833 3834 Paul Eggert's batch of changes 3835 3836 3837 Release code1996m-data1996l - 1996-11-05 14:00:12 -0500 3838 3839 No functional changes here; the files have simply been changed to 3840 make more use of ISO style dates in comments. The names of the above 3841 files now include the year in full. 3842 3843 3844 Release code96l - 1996-09-08 17:12:20 -0400 3845 3846 tzcode96k was missing a couple of pieces. 3847 3848 3849 Release 96k - 1996-09-08 16:06:22 -0400 3850 3851 the latest round of changes from Paul Eggert 3852 3853 the recent Year 2000 material 3854 3855 3856 Release code96j - 1996-07-30 13:18:53 -0400 3857 3858 Set sp->typecnt as suggested by Timothy Patrick Murphy. 3859 3860 3861 Release code96i - 1996-07-27 20:11:35 -0400 3862 3863 Paul's suggested patch for strftime %V week numbers 3864 3865 3866 Release data96i - 1996-07-01 18:13:04 -0400 3867 3868 "northamerica" and "europe" changes by Paul Eggert 3869 3870 3871 Release code96h - 1996-06-05 08:02:21 -0400 3872 3873 fix for handling transitions specified in Universal Time 3874 3875 Some "public domain" notices have also been added. 3876 3877 3878 Release code96g - 1996-05-16 14:00:26 -0400 3879 3880 fix for the simultaneous-DST-and-zone-change challenge 3881 3882 3883 Release data96h - 1996-05-09 17:40:51 -0400 3884 3885 changes by Paul Eggert 3886 3887 3888 Release code96f-data96g - 1996-05-03 03:09:59 -0000 3889 [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!] 3890 3891 The changes get us some of the way to fixing the problems noted in Paul 3892 Eggert's letter yesterday (in addition to a few others). The approach 3893 has been to make zic a bit smarter about figuring out what time zone 3894 abbreviations apply just after the time specified in the "UNTIL" part 3895 of a zone line. Putting the smarts in zic means avoiding having 3896 transition times show up in both "Zone" lines and "Rule" lines, which 3897 in turn avoids multiple transition time entries in time zone files. 3898 (This also makes the zic input files such as "europe" a bit shorter and 3899 should ease maintenance.) 3900 3901 3902 Release data96f - 1996-04-19 19:20:03 -0000 3903 [tzdata96f.tar.gz is missing!] 3904 3905 The only changes are to the "northamerica" file; the time zone 3906 abbreviation for Denver is corrected to MST (and MDT), and the 3907 comments for Mexico have been updated. 3908 3909 3910 Release data96e - 1996-03-19 17:37:26 -0500 3911 3912 Proposals by Paul Eggert, in particular the Portugal change that 3913 comes into play at the end of this month. 3914 3915 3916 Release data96d - 1996-03-18 20:49:39 -0500 3917 3918 [not summarized] 3919 3920 3921 Release code96e - 1996-02-29 15:43:27 -0000 3922 [tzcode96e.tar.gz is missing!] 3923 3924 internationalization changes and the fix to the documentation for strftime 3925 3926 3927 Release code96d-data96c - 1996-02-12 11:05:27 -0500 3928 3929 The "code" file simply updates Bob Kridle's electronic address. 3930 3931 The "data" file updates rules for Mexico. 3932 3933 3934 Release data96b - 1996-01-27 15:44:42 -0500 3935 3936 Kiribati change 3937 3938 3939 Release code96c - 1996-01-16 16:58:15 -0500 3940 3941 leap-year streamlining and binary-search changes 3942 3943 fix to newctime.3 3944 3945 3946 Release code96b - 1996-01-10 20:42:39 -0500 3947 3948 fixes and enhancements from Paul Eggert, including code that 3949 emulates the behavior of recent versions of the SunOS "date" 3950 command. 3951 3952 3953 Release 96a - 1996-01-06 09:08:24 -0500 3954 3955 Israel updates 3956 3957 fixes to strftime.c for correct ISO 8601 week number generation, 3958 plus support for two new formats ('G' and 'g') to give ISO 8601 year 3959 numbers (which are not necessarily the same as calendar year numbers) 3960 3961 3962 Release code95i-data95m - 1995-12-21 12:46:47 -0500 3963 3964 The latest revisions from Paul Eggert are included, the usno1995 3965 file has been updated, and a new file ("WWW") covering useful URLs 3966 has been added. 3967 3968 3969 Release code95h-data95l - 1995-12-19 18:10:12 -0500 3970 3971 A simplification of a macro definition, a change to data for Sudan, 3972 and (for last minute shoppers) notes in the "Music" file on the CD 3973 "Old Man Time". 3974 3975 3976 Release code95g-data95k - 1995-10-30 10:32:47 -0500 3977 3978 (slightly reformatted) 8-bit-clean proposed patch 3979 3980 minor patch: US/Eastern -> America/New_York 3981 3982 snapshot of the USNO's latest data ("usno1995") 3983 3984 some other minor cleanups 3985 3986 3987 Release code95f-data95j - 1995-10-28 21:01:34 -0000 3988 [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!] 3989 3990 European cleanups 3991 3992 support for 64-bit time_t's 3993 3994 optimization in localtime.c 3995 3996 3997 Release code95e - 1995-10-13 13:23:57 -0400 3998 3999 the mktime change to scan from future to past when trying to find time zone 4000 offsets 4001 4002 4003 Release data95i - 1995-09-26 10:43:26 -0400 4004 4005 For Canada/Central, guess that the Sun customer's "one week too 4006 early" was just a approximation, and the true error is one month 4007 too early. This is consistent with the rest of Canada. 4008 4009 4010 Release data95h - 1995-09-21 11:26:48 -0400 4011 4012 latest changes from Paul Eggert 4013 4014 4015 Release code95d - 1995-09-14 11:14:45 -0400 4016 4017 the addition of a "Music" file, which documents four recorded 4018 versions of the tune "Save That Time". 4019 4020 4021 Release data95g - 1995-09-01 17:21:36 -0400 4022 4023 "yearistype" correction 4024 4025 4026 Release data95f - 1995-08-28 20:46:56 -0400 4027 4028 Paul Eggert's change to the australasia file 4029 4030 4031 Release data95e - 1995-07-08 18:02:34 -0400 4032 4033 The only change is a leap second at the end of this year. 4034 Thanks to Bradley White for forwarding news on the leap second. 4035 4036 4037 Release data95d - 1995-07-03 13:26:22 -0400 4038 4039 Paul Eggert's changes 4040 4041 4042 Release data95c - 1995-07-02 19:19:28 -0400 4043 4044 changes to "asia", "backward", "europe", and "southamerica" 4045 (read: northamericacentrics need not apply) 4046 4047 4048 Release code95c - 1995-03-13 14:00:46 -0500 4049 4050 one-line fix for sign extension problems in detzcode 4051 4052 4053 Release 95b - 1995-03-04 11:22:38 -0500 4054 4055 Minor changes in both: 4056 4057 The "code" file contains a workaround for the lack of "unistd.h" in 4058 Microsoft C++ version 7. 4059 4060 The "data" file contains a fixed "Link" for America/Shiprock. 4061 4062 4063 Release 94h - 1994-12-10 12:51:14 -0500 4064 4065 The files: 4066 4067 * incorporate the changes to "zdump" and "date" to make changes to 4068 the "TZ" environment variable permanent; 4069 4070 * incorporate the table changes by Paul Eggert; 4071 4072 * include (and document) support for universal time specifications in 4073 data files - but do not (yet) include use of this feature in the 4074 data files. 4075 4076 Think of this as "TZ Classic" - the software has been set up not to break if 4077 universal time shows up in its input, and data entries have been 4078 left as is so as not to break existing implementations. 4079 4080 4081 Release data94f - 1994-08-20 12:56:09 -0400 4082 4083 (with thanks!) the latest data updates from Paul Eggert 4084 4085 4086 Release data94e - 1994-06-04 13:13:53 -0400 4087 4088 [not summarized] 4089 4090 4091 Release code94g - 1994-05-05 12:14:07 -0400 4092 4093 fix missing "optind.c" and a reference to it in the Makefile 4094 4095 4096 Release code94f - 1994-05-05 13:00:33 -0000 4097 [tzcode94f.tar.gz is missing!] 4098 4099 changes to avoid overflow in difftime, as well as changes to cope 4100 with the 52/53 challenge in strftime 4101 4102 4103 Release code94e - 1994-03-30 23:32:59 -0500 4104 4105 change for the benefit of PCTS 4106 4107 4108 Release 94d - 1994-02-24 15:42:25 -0500 4109 4110 Avoid clashes with POSIX semantics for zones such as GMT+4. 4111 4112 Some other very minor housekeeping is also present. 4113 4114 4115 Release code94c - 1994-02-10 08:52:40 -0500 4116 4117 Fix bug where mkdirs was broken unless you compile with 4118 -fwritable-strings (which is generally losing to do). 4119 4120 4121 Release 94b - 1994-02-07 10:04:33 -0500 4122 4123 work by Paul Eggert who notes: 4124 4125 I found another book of time zone histories by E W Whitman; it's not 4126 as extensive as Shanks but has a few goodies of its own. I used it 4127 to update the tables. I also fixed some more as a result of 4128 correspondence with Adam David and Peter Ilieve, and move some stray 4129 links from 'europe' to 'backward'. I corrected some scanning errors 4130 in usno1989. 4131 4132 As far as the code goes, I fixed zic to allow years in the range 4133 INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900. 4134 And I cleaned up the zic documentation a little bit. 4135 4136 4137 Release data94a - 1994-02-03 08:58:54 -0500 4138 4139 It simply incorporates the recently announced leap second into the 4140 "leapseconds" file. 4141 4142 4143 Release 93g - 1993-11-22 17:28:27 -0500 4144 4145 Paul Eggert has provided a good deal of historic information (based 4146 on Shanks), and there are some code changes to deal with the buglets 4147 that crawled out in dealing with the new information. 4148 4149 4150 Release 93f - 1993-10-15 12:27:46 -0400 4151 4152 Paul Eggert's changes 4153 4154 4155 Release 93e - 1993-09-05 21:21:44 -0400 4156 4157 This has updated data for Israel, England, and Kwajalein. There's 4158 also an update to "zdump" to cope with Kwajalein's 24-hour jump. 4159 Thanks to Paul Eggert and Peter Ilieve for the changes. 4160 4161 4162 Release 93d - 1993-06-17 23:34:17 -0400 4163 4164 new fix and new data on Israel 4165 4166 4167 Release 93c - 1993-06-06 19:31:55 -0400 4168 4169 [not summarized] 4170 4171 4172 Release 93b - 1993-02-02 14:53:58 -0500 4173 4174 updated "leapseconds" file 4175 4176 4177 Release 93 - 1993-01-08 07:01:06 -0500 4178 4179 At kre's suggestion, the package has been split in two - a code piece 4180 (which also includes documentation) that's only of use to folks who 4181 want to recompile things and a data piece useful to anyone who can 4182 run "zic". 4183 4184 The new version has a few changes to the data files, a few 4185 portability changes, and an off-by-one fix (with thanks to 4186 Tom Karzes at deshaw.com for providing a description and a 4187 solution). 4188 4189 4190 Release 92c - 1992-11-21 17:35:36 -0000 4191 [tz92c.tar.Z is missing!] 4192 4193 The fallout from the latest round of DST transitions. 4194 4195 There are changes for Portugal, Saskatchewan, and "Pacific-New"; 4196 there's also a change to "zic.c" that makes it portable to more systems. 4197 4198 4199 Release 92 - 1992-04-25 18:17:03 -0000 4200 [tz92.tar.Z is missing!] 4201 4202 By popular demand (well, at any rate, following a request by kre at munnari) 4203 4204 4205 The 1989 update of the time zone package featured: 4206 4207 * POSIXization (including interpretation of POSIX-style TZ environment 4208 variables, provided by Guy Harris), 4209 * ANSIfication (including versions of "mktime" and "difftime"), 4210 * SVIDulation (an "altzone" variable) 4211 * MACHination (the "gtime" function) 4212 * corrections to some time zone data (including corrections to the rules 4213 for Great Britain and New Zealand) 4214 * reference data from the United States Naval Observatory for folks who 4215 want to do additional time zones 4216 * and the 1989 data for Saudi Arabia. 4217 4218 (Since this code will be treated as "part of the implementation" in some 4219 places and as "part of the application" in others, there's no good way to 4220 name functions, such as timegm, that are not part of the proposed ANSI C 4221 standard; such functions have kept their old, underscore-free names in this 4222 update.) 4223 4224 And the "dysize" function has disappeared; it was present to allow 4225 compilation of the "date" command on old BSD systems, and a version of "date" 4226 is now provided in the package. The "date" command is not created when you 4227 "make all" since it may lack options provided by the version distributed with 4228 your operating system, or may not interact with the system in the same way 4229 the native version does. 4230 4231 Since POSIX frowns on correct leap second handling, the default behavior of 4232 the "zic" command (in the absence of a "-L" option) has been changed to omit 4233 leap second information from its output files. 4234 4235 4236 ----- 4237 Notes 4238 4239 This file contains copies of the part of each release announcement 4240 that talks about the changes in that release. The text has been 4241 adapted and reformatted for the purposes of this file. 4242 4243 Traditionally a release R consists of a pair of tarball files, 4244 tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g., 4245 code2010a, data2012c) consist of just one or the other tarball, and a 4246 few (e.g., code2012c-data2012d) have tarballs with mixed version 4247 numbers. Recent releases also come in an experimental format 4248 consisting of a single tarball tzdb-R.tar.lz with extra data. 4249 4250 Release timestamps are taken from the release's commit (for newer, 4251 Git-based releases), from the newest file in the tarball (for older 4252 releases, where this info is available) or from the email announcing 4253 the release (if all else fails; these are marked with a time zone of 4254 -0000 and an "is missing!" comment). 4255 4256 Earlier versions of the code and data were not announced on the tz 4257 list and are not summarized here. 4258 4259 This file is in the public domain. 4260 4261 Local Variables: 4262 coding: utf-8 4263 End: 4264
Indexes created Mon Sep 29 03:10:08 GMT 2025