NEWS revision 1.24
1 News for the tz database 2 3 Release 2018e - 2018-05-01 23:42:51 -0700 4 5 Briefly: 6 7 North Korea switches back to +09 on 2018-05-05. 8 The main format uses negative DST again, for Ireland etc. 9 'make tarballs' now also builds a rearguard tarball. 10 New 's' and 'd' suffixes in SAVE columns of Rule and Zone lines. 11 12 Changes to past and future time stamps 13 14 North Korea switches back from +0830 to +09 on 2018-05-05. 15 (Thanks to Kang Seonghoon, Arthur David Olson, Seo Sanghyeon, 16 and Tim Parenti.) 17 18 Bring back the negative-DST changes of 2018a, except be more 19 compatible with data parsers that do not support negative DST. 20 Also, this now affects historical time stamps in Namibia and the 21 former Czechoslovakia, not just Ireland. The main format now uses 22 negative DST to model time stamps in Europe/Dublin (from 1971 on), 23 Europe/Prague (1946/7), and Africa/Windhoek (1994/2017). This 24 does not affect UT offsets, only time zone abbreviations and the 25 tm_isdst flag. Also, this does not affect rearguard or vanguard 26 formats; effectively the main format now uses vanguard instead of 27 rearguard format. Data parsers that do not support negative DST 28 can still use data from the rearguard tarball described below. 29 30 Changes to build procedure 31 32 The command 'make tarballs' now also builds the tarball 33 tzdataVERSION-rearguard.tar.gz, which is like tzdataVERSION.tar.gz 34 except that it uses rearguard format intended for trailing-edge 35 data parsers. 36 37 Changes to data format and to code 38 39 The SAVE column of Rule and Zone lines can now have an 's' or 'd' 40 suffix, which specifies whether the adjusted time is standard time 41 or daylight saving time. If no suffix is given, daylight saving 42 time is used if and only if the SAVE column is nonzero; this is 43 the longstanding behavior. Although this new feature is not used 44 in tzdata, it could be used to specify the legal time in Namibia 45 1994-2017, as opposed to the popular time (see below). 46 47 Changes to past time stamps 48 49 From 1994 through 2017 Namibia observed DST in winter, not summer. 50 That is, it used negative DST, as Ireland still does. This change 51 does not affect UTC offsets; it affects only the tm_isdst flag and 52 the abbreviation used during summer, which is now CAT, not WAST. 53 Although (as noted by Michael Deckers) summer and winter time were 54 both simply called "standard time" in Namibian law, in common 55 practice winter time was considered to be DST (as noted by Stephen 56 Colebourne). The full effect of this change is only in vanguard 57 format; in rearguard and main format, the tm_isdst flag is still 58 zero in winter and nonzero in summer. 59 60 In 1946/7 Czechoslovakia also observed negative DST in winter. 61 The full effect of this change is only in vanguard format; in 62 rearguard and main formats, it is modeled as plain GMT without 63 daylight saving. Also, the dates of some 1944/5 DST transitions 64 in Czechoslovakia have been changed. 65 66 67 Release 2018d - 2018-03-22 07:05:46 -0700 68 69 Briefly: 70 71 Palestine starts DST a week earlier in 2018. 72 Add support for vanguard and rearguard data consumers. 73 Add subsecond precision to source data format, though not to data. 74 75 Changes to future time stamps 76 77 In 2018, Palestine starts DST on March 24, not March 31. 78 Adjust future predictions accordingly. (Thanks to Sharef Mustafa.) 79 80 Changes to past and future time stamps 81 82 Casey Station in Antarctica changed from +11 to +08 on 2018-03-11 83 at 04:00. (Thanks to Steffen Thorsen.) 84 85 Changes to past time stamps 86 87 Historical transitions for Uruguay, represented by 88 America/Montevideo, have been updated per official legal documents, 89 replacing previous data mainly originating from the inventions of 90 Shanks & Pottenger. This has resulted in adjustments ranging from 91 30 to 90 minutes in either direction over at least two dozen 92 distinct periods ranging from one day to several years in length. 93 A mere handful of pre-1991 transitions are unaffected; data since 94 then has come from more reliable contemporaneous reporting. These 95 changes affect various timestamps in 1920-1923, 1936, 1939, 96 1942-1943, 1959, 1966-1970, 1972, 1974-1980, and 1988-1990. 97 Additionally, Uruguay's pre-standard-time UT offset has been 98 adjusted westward by 7 seconds, from UT-03:44:44 to UT-03:44:51, to 99 match the location of the Observatory of the National Meteorological 100 Institute in Montevideo. 101 (Thanks to Jeremie Bonjour, Tim Parenti, and Michael Deckers.) 102 103 Enderbury and Kiritimati skipped New Year's Eve 1994, not 104 New Year's Day 1995. (Thanks to Kerry Shetline.) 105 106 Fix the 1912-01-01 transition for Portugal and its colonies. 107 This transition was at 00:00 according to the new UT offset, not 108 according to the old one. Also assume that Cape Verde switched on 109 the same date as the rest, not in 1907. This affects 110 Africa/Bissau, Africa/Sao_Tome, Asia/Macau, Atlantic/Azores, 111 Atlantic/Cape_Verde, Atlantic/Madeira, and Europe/Lisbon. 112 (Thanks to Michael Deckers.) 113 114 Fix an off-by-1 error for pre-1913 timestamps in Jamaica and in 115 Turks & Caicos. 116 117 Changes to past time zone abbreviations 118 119 MMT took effect in Uruguay from 1908-06-10, not 1898-06-28. There 120 is no clock change associated with the transition. 121 122 Changes to build procedure 123 124 The new DATAFORM macro in the Makefile lets the installer choose 125 among three source data formats. The idea is to lessen downstream 126 disruption when data formats are improved. 127 128 * DATAFORM=vanguard installs from the latest, bleeding-edge 129 format. DATAFORM=main (the default) installs from the format 130 used in the 'africa' etc. files. DATAFORM=rearguard installs 131 from a trailing-edge format. Eventually, elements of today's 132 vanguard format should move to the main format, and similarly 133 the main format's features should eventually move to the 134 rearguard format. 135 136 * In the current version, the main and rearguard formats are 137 identical and match that of 2018c, so this change does not 138 affect default behavior. The vanguard format currently contains 139 one feature not in the main format: negative SAVE values. This 140 improves support for Ireland, which uses Irish Standard Time 141 (IST, UTC+01) in summer and GMT (UTC) in winter. tzcode has 142 supported negative SAVE values for decades, and this feature 143 should move to the main format soon. However, it will not move 144 to the rearguard format for quite some time because some 145 downstream parsers do not support it. 146 147 * The build procedure constructs three files vanguard.zi, main.zi, 148 and rearguard.zi, one for each format. The files represent the 149 same data as closely as the formats allow. These three files 150 are intended for downstream data consumers and are not 151 installed. Zoneinfo parsers that do not support negative SAVE values 152 should start using rearguard.zi, so that they will be unaffected 153 when the negative-DST feature moves from vanguard to main. 154 Bleeding-edge Zoneinfo parsers that support the new features 155 already can use vanguard.zi; in this respect, current tzcode is 156 bleeding-edge. 157 158 The Makefile should now be safe for parallelized builds, and 'make 159 -j to2050new.tzs' is now much faster on a multiprocessor host 160 with GNU Make. 161 162 When built with -DSUPPRESS_TZDIR, the tzcode library no longer 163 prepends TZDIR/ to file names that do not begin with '/'. This is 164 not recommended for general use, due to its security implications. 165 (From a suggestion by Manuela Friedrich.) 166 167 Changes to code 168 169 zic now accepts subsecond precision in expressions like 170 00:19:32.13, which is approximately the legal time of the 171 Netherlands from 1835 to 1937. However, because it is 172 questionable whether the few recorded uses of non-integer offsets 173 had subsecond precision in practice, there are no plans for tzdata 174 to use this feature. (Thanks to Steve Allen for pointing out 175 the limitations of historical data in this area.) 176 177 The code is a bit more portable to MS-Windows. Installers can 178 compile with -DRESERVE_STD_EXT_IDS on MS-Windows platforms that 179 reserve identifiers like 'localtime'. (Thanks to Manuela 180 Friedrich). 181 182 Changes to documentation and commentary 183 184 theory.html now outlines tzdb's extensions to POSIX's model for 185 civil time, and has a section "POSIX features no longer needed" 186 that lists POSIX API components that are now vestigial. 187 (From suggestions by Steve Summit.) It also better distinguishes 188 time zones from tz regions. (From a suggestion by Guy Harris.) 189 190 Commentary is now more consistent about using the phrase "daylight 191 saving time", to match the C name tm_isdst. Daylight saving time 192 need not occur in summer, and need not have a positive offset from 193 standard time. 194 195 Commentary about historical transitions in Uruguay has been expanded 196 with links to many relevant legal documents. 197 (Thanks to Tim Parenti.) 198 199 Commentary now uses some non-ASCII characters with Unicode value 200 less than U+0100, as they can be useful and should work even with 201 older editors such as XEmacs. 202 203 204 Release 2018c - 2018-01-22 23:00:44 -0800 205 206 Briefly: 207 Revert Irish changes that relied on negative SAVE values. 208 209 Changes to tm_isdst 210 211 Revert the 2018a change to Europe/Dublin. As before, this change 212 does not affect UT offsets or abbreviations; it affects only 213 whether timestamps are considered to be standard time or 214 daylight-saving time, as expressed in the tm_isdst flag of C's 215 struct tm type. This reversion is intended to be a temporary 216 workaround for problems discovered with downstream uses of 217 releases 2018a and 2018b, which implemented Irish time by using 218 negative SAVE values in the Eire rules of the 'europe' file. 219 Although negative SAVE values have been part of tzcode for many 220 years and are supported by many platforms, they were not 221 documented before 2018a and ICU and OpenJDK do not currently 222 support them. A mechanism to export data to platforms lacking 223 support for negative DST is planned to be developed before the 224 change is reapplied. (Problems reported by Deborah Goldsmith and 225 Stephen Colebourne.) 226 227 Changes to past time stamps 228 229 Japanese DST transitions (1948-1951) were Sundays at 00:00, not 230 Saturdays or Sundays at 02:00. (Thanks to Takayuki Nikai.) 231 232 Changes to build procedure 233 234 The build procedure now works around mawk 1.3.3's lack of support 235 for character class expressions. (Problem reported by Ohyama.) 236 237 238 Release 2018b - 2018-01-17 23:24:48 -0800 239 240 Briefly: 241 Fix a packaging problem in tz2018a, which was missing 'pacificnew'. 242 243 Changes to build procedure 244 245 The distribution now contains the file 'pacificnew' again. 246 This file was inadvertantly omitted in the 2018a distribution. 247 (Problem reported by Matias Fonzo.) 248 249 250 Release 2018a - 2018-01-12 22:29:21 -0800 251 252 Briefly: 253 So Tom and Prncipe switched from +00 to +01. 254 Brazil's DST will now start on November's first Sunday. 255 Ireland's standard time is now in the summer, not the winter. 256 Use Debian-style installation locations, instead of 4.3BSD-style. 257 New zic option -t. 258 259 Changes to past and future time stamps 260 261 So Tom and Prncipe switched from +00 to +01 on 2018-01-01 at 262 01:00. (Thanks to Steffen Thorsen and Michael Deckers.) 263 264 Changes to future time stamps 265 266 Starting in 2018 southern Brazil will begin DST on November's 267 first Sunday instead of October's third Sunday. (Thanks to 268 Steffen Thorsen.) 269 270 Changes to past time stamps 271 272 A discrepancy of 4 s in timestamps before 1931 in South Sudan has 273 been corrected. The 'backzone' and 'zone.tab' files did not agree 274 with the 'africa' and 'zone1970.tab' files. (Problem reported by 275 Michael Deckers.) 276 277 The abbreviation invented for Bolivia Summer Time (1931-2) is now 278 BST instead of BOST, to be more consistent with the convention 279 used for Latvian Summer Time (1918-9) and for British Summer Time. 280 281 Changes to tm_isdst 282 283 Change Europe/Dublin so that it observes Irish Standard Time (UT 284 +01) in summer and GMT (as negative daylight-saving) in winter, 285 instead of observing standard time (GMT) in winter and Irish 286 Summer Time (UT +01) in summer. This change does not affect UT 287 offsets or abbreviations; it affects only whether timestamps are 288 considered to be standard time or daylight-saving time, as 289 expressed in the tm_isdst flag of C's struct tm type. 290 (Discrepancy noted by Derick Rethans.) 291 292 Changes to build procedure 293 294 The default installation locations have been changed to mostly 295 match Debian circa 2017, instead of being designed as an add-on to 296 4.3BSD circa 1986. This affects the Makefile macros TOPDIR, 297 TZDIR, MANDIR, and LIBDIR. New Makefile macros TZDEFAULT, USRDIR, 298 USRSHAREDIR, BINDIR, ZDUMPDIR, and ZICDIR let installers tailor 299 locations more precisely. (This responds to suggestions from 300 Brian Inglis and from Steve Summit.) 301 302 The default installation procedure no longer creates the 303 backward-compatibility link US/Pacific-New, which causes 304 confusion during user setup (e.g., see Debian bug 815200). 305 Use 'make BACKWARD="backward pacificnew"' to create the link 306 anyway, for now. Eventually we plan to remove the link entirely. 307 308 tzdata.zi now contains a version-number comment. 309 (Suggested by Tom Lane.) 310 311 The Makefile now quotes values like BACKWARD more carefully when 312 passing them to the shell. (Problem reported by Zefram.) 313 314 Builders no longer need to specify -DHAVE_SNPRINTF on platforms 315 that have snprintf and use pre-C99 compilers. (Problem reported 316 by Jon Skeet.) 317 318 Changes to code 319 320 zic has a new option -t FILE that specifies the location of the 321 file that determines local time when TZ is unset. The default for 322 this location can be configured via the new TZDEFAULT makefile 323 macro, which defaults to /etc/localtime. 324 325 Diagnostics and commentary now distinguish UT from UTC more 326 carefully; see theory.html for more information about UT vs UTC. 327 328 zic has been ported to GCC 8's -Wstringop-truncation option. 329 (Problem reported by Martin Sebor.) 330 331 Changes to documentation and commentary 332 333 The zic man page now documents the longstanding behavior that 334 times and years can be out of the usual range, with negative times 335 counting backwards from midnight and with year 0 preceding year 1. 336 (Problem reported by Michael Deckers.) 337 338 The theory.html file now mentions the POSIX limit of six chars 339 per abbreviation, and lists alphabetic abbreviations used. 340 341 The files tz-art.htm and tz-link.htm have been renamed to 342 tz-art.html and tz-link.html, respectively, for consistency with 343 other file names and to simplify web server configuration. 344 345 346 Release 2017c - 2017-10-20 14:49:34 -0700 347 348 Briefly: 349 Northern Cyprus switches from +03 to +02/+03 on 2017-10-29. 350 Fiji ends DST 2018-01-14, not 2018-01-21. 351 Namibia switches from +01/+02 to +02 on 2018-04-01. 352 Sudan switches from +03 to +02 on 2017-11-01. 353 Tonga likely switches from +13/+14 to +13 on 2017-11-05. 354 Turks & Caicos switches from -04 to -05/-04 on 2018-11-04. 355 A new file tzdata.zi now holds a small text copy of all data. 356 The zic input format has been regularized slightly. 357 358 Changes to future time stamps 359 360 Northern Cyprus has decided to resume EU rules starting 361 2017-10-29, thus reinstituting winter time. 362 363 Fiji ends DST 2018-01-14 instead of the 2018-01-21 previously 364 predicted. (Thanks to Dominic Fok.) Adjust future predictions 365 accordingly. 366 367 Namibia will switch from +01 with DST to +02 all year on 368 2017-09-03 at 02:00. This affects UT offsets starting 2018-04-01 369 at 02:00. (Thanks to Steffen Thorsen.) 370 371 Sudan will switch from +03 to +02 on 2017-11-01. (Thanks to Ahmed 372 Atyya and Yahia Abdalla.) South Sudan is not switching, so 373 Africa/Juba is no longer a link to Africa/Khartoum. 374 375 Tonga has likely ended its experiment with DST, and will not 376 adjust its clocks on 2017-11-05. Although Tonga has not announced 377 whether it will continue to observe DST, the IATA is assuming that 378 it will not. (Thanks to David Wade.) 379 380 Turks & Caicos will switch from -04 all year to -05 with US DST on 381 2018-03-11 at 03:00. This affects UT offsets starting 2018-11-04 382 at 02:00. (Thanks to Steffen Thorsen.) 383 384 Changes to past time stamps 385 386 Namibia switched from +02 to +01 on 1994-03-21, not 1994-04-03. 387 (Thanks to Arthur David Olson.) 388 389 Detroit did not observe DST in 1967. 390 391 Use railway time for Asia/Kolkata before 1941, by switching to 392 Madras local time (UT +052110) in 1870, then to IST (UT +0530) in 393 1906. Also, treat 1941-2's +0630 as DST, like 1942-5. 394 395 Europe/Dublin's 1946 and 1947 fallback transitions occurred at 396 02:00 standard time, not 02:00 DST. (Thanks to Michael Deckers.) 397 398 Pacific/Apia and Pacific/Pago_Pago switched from Antipodean to 399 American time in 1892, not 1879. (Thanks to Michael Deckers.) 400 401 Adjust the 1867 transition in Alaska to better reflect the 402 historical record, by changing it to occur on 1867-10-18 at 15:30 403 Sitka time rather than at the start of 1867-10-17 local time. 404 Although strictly speaking this is accurate only for Sitka, 405 the rest of Alaska's blanks need to be filled in somehow. 406 407 Fix off-by-one errors in UT offsets for Adak and Nome before 1867. 408 (Thanks to Michael Deckers.) 409 410 Add 7 s to the UT offset in Asia/Yangon before 1920. 411 412 Changes to zone names 413 414 Remove Canada/East-Saskatchewan from the 'backward' file, as it 415 exceeded the 14-character limit and was an unused misnomer anyway. 416 417 Changes to build procedure 418 419 To support applications that prefer to read time zone data in text 420 form, two zic input files tzdata.zi and leapseconds are now 421 installed by default. The commands 'zic tzdata.zi' and 'zic -L 422 leapseconds tzdata.zi' can reproduce the tzdata binary files 423 without and with leap seconds, respectively. To prevent these two 424 new files from being installed, use 'make TZDATA_TEXT=', and to 425 suppress leap seconds from the tzdata text installation, use 'make 426 TZDATA_TEXT=tzdata.zi'. 427 428 'make BACKWARD=' now suppresses backward-compatibility names 429 like 'US/Pacific' that are defined in the 'backward' and 430 'pacificnew' files. 431 432 'make check' now works on systems that lack a UTF-8 locale, 433 or that lack the nsgmls program. Set UTF8_LOCALE to configure 434 the name of a UTF-8 locale, if you have one. 435 436 Y2K runtime checks are no longer enabled by default. Add 437 -DDEPRECATE_TWO_DIGIT_YEARS to CFLAGS to enable them, instead of 438 adding -DNO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU 439 to disable them. (New name suggested by Brian Inglis.) 440 441 The build procedure for zdump now works on AIX 7.1. 442 (Problem reported by Kees Dekker.) 443 444 Changes to code 445 446 zic and the reference runtime now reject multiple leap seconds 447 within 28 days of each other, or leap seconds before the Epoch. 448 As a result, support for double leap seconds, which was 449 obsolescent and undocumented, has been removed. Double leap 450 seconds were an error in the C89 standard; they have never existed 451 in civil timekeeping. (Thanks to Robert Elz and Bradley White for 452 noticing glitches in the code that uncovered this problem.) 453 454 zic now warns about use of the obsolescent and undocumented -y 455 option, and about use of the obsolescent TYPE field of Rule lines. 456 457 zic now allows unambiguous abbreviations like "Sa" and "Su" for 458 weekdays; formerly it rejected them due to a bug. Conversely, zic 459 no longer considers non-prefixes to be abbreviations; for example, 460 it no longer accepts "lF" as an abbreviation for "lastFriday". 461 Also, zic warns about the undocumented usage with a "last-" 462 prefix, e.g., "last-Fri". 463 464 Similarly, zic now accepts the unambiguous abbreviation "L" for 465 "Link" in ordinary context and for "Leap" in leap-second context. 466 Conversely, zic no longer accepts non-prefixes such as "La" as 467 abbreviations for words like "Leap". 468 469 zic no longer accepts leap second lines in ordinary input, or 470 ordinary lines in leap second input. Formerly, zic sometimes 471 warned about this undocumented usage and handled it incorrectly. 472 473 The new macro HAVE_TZNAME governs whether the tzname external 474 variable is exported, instead of USG_COMPAT. USG_COMPAT now 475 governs only the external variables "timezone" and "daylight". 476 This change is needed because the three variables are not in the 477 same category: although POSIX requires tzname, it specifies the 478 other two variables as optional. Also, USG_COMPAT is now 1 or 0: 479 if not defined, the code attempts to guess it from other macros. 480 481 localtime.c and difftime.c no longer require stdio.h, and .c files 482 other than zic.c no longer require sys/wait.h. 483 484 zdump.c no longer assumes snprintf. (Reported by Jonathan Leffler.) 485 486 Calculation of time_t extrema works around a bug in GCC 4.8.4 487 (Reported by Stan Shebs and Joseph Myers.) 488 489 zic.c no longer mistranslates formats of line numbers in non-English 490 locales. (Problem reported by Benno Schulenberg.) 491 492 Several minor changes have been made to the code to make it a 493 bit easier to port to MS-Windows and Solaris. (Thanks to Kees 494 Dekker for reporting the problems.) 495 496 Changes to documentation and commentary 497 498 The two new files 'theory.html' and 'calendars' contain the 499 contents of the removed file 'Theory'. The goal is to document 500 tzdb theory more accessibly. 501 502 The zic man page now documents abbreviation rules. 503 504 tz-link.htm now covers how to apply tzdata changes to clients. 505 (Thanks to Jorge Fbregas for the AIX link.) It also mentions MySQL. 506 507 The leap-seconds.list URL has been updated to something that is 508 more reliable for tzdb. (Thanks to Tim Parenti and Brian Inglis.) 509 510 Release 2017b - 2017-03-17 07:30:38 -0700 511 512 Briefly: Haiti has resumed DST. 513 514 Changes to past and future time stamps 515 516 Haiti resumed observance of DST in 2017. (Thanks to Steffen Thorsen.) 517 518 Changes to past time stamps 519 520 Liberia changed from -004430 to +00 on 1972-01-07, not 1972-05-01. 521 522 Use "MMT" to abbreviate Liberia's time zone before 1972, as "-004430" 523 is one byte over the POSIX limit. (Problem reported by Derick Rethans.) 524 525 Changes to code 526 527 The reference localtime implementation now falls back on the 528 current US daylight-saving transition rules rather than the 529 1987-2006 rules. This fallback occurs only when (1) the TZ 530 environment variable's value has a name like "AST4ADT" that asks 531 for daylight saving time but does not specify the rules, (2) there 532 is no file by that name, and (3) the TZDEFRULES file cannot be 533 loaded. (Thanks to Tom Lane.) 534 535 536 Release 2017a - 2017-02-28 00:05:36 -0800 537 538 Briefly: Southern Chile moves from -04/-03 to -03, and Mongolia 539 discontinues DST. 540 541 Changes to future time stamps 542 543 Mongolia no longer observes DST. (Thanks to Ganbold Tsagaankhuu.) 544 545 Chile's Region of Magallanes moves from -04/-03 to -03 year-round. 546 Its clocks diverge from America/Santiago starting 2017-05-13 at 547 23:00, hiving off a new zone America/Punta_Arenas. Although the 548 Chilean government says this change expires in May 2019, for now 549 assume it's permanent. (Thanks to Juan Correa and Deborah 550 Goldsmith.) This also affects Antarctica/Palmer. 551 552 Changes to past time stamps 553 554 Fix many entries for historical time stamps for Europe/Madrid 555 before 1979, to agree with tables compiled by Pere Planesas of the 556 National Astronomical Observatory of Spain. As a side effect, 557 this changes some time stamps for Africa/Ceuta before 1929, which 558 are probably guesswork anyway. (Thanks to Steve Allen and 559 Pierpaolo Bernardi for the heads-ups, and to Michael Deckers for 560 correcting the 1901 transition.) 561 562 Ecuador observed DST from 1992-11-28 to 1993-02-05. 563 (Thanks to Alois Treindl.) 564 565 Asia/Atyrau and Asia/Oral were at +03 (not +04) before 1930-06-21. 566 (Thanks to Stepan Golosunov.) 567 568 Changes to past and future time zone abbreviations 569 570 Switch to numeric time zone abbreviations for South America, as 571 part of the ongoing project of removing invented abbreviations. 572 This avoids the need to invent an abbreviation for the new Chilean 573 new zone. Similarly, switch from invented to numeric time zone 574 abbreviations for Afghanistan, American Samoa, the Azores, 575 Bangladesh, Bhutan, the British Indian Ocean Territory, Brunei, 576 Cape Verde, Chatham Is, Christmas I, Cocos (Keeling) Is, Cook Is, 577 Dubai, East Timor, Eucla, Fiji, French Polynesia, Greenland, 578 Indochina, Iran, Iraq, Kiribati, Lord Howe, Macquarie, Malaysia, 579 the Maldives, Marshall Is, Mauritius, Micronesia, Mongolia, 580 Myanmar, Nauru, Nepal, New Caledonia, Niue, Norfolk I, Palau, 581 Papua New Guinea, the Philippines, Pitcairn, Qatar, Runion, St 582 Pierre & Miquelon, Samoa, Saudi Arabia, Seychelles, Singapore, 583 Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, Wallis & Futuna, and 584 Xinjiang; for 20-minute daylight saving time in Ghana before 1943; 585 for half-hour daylight saving time in Belize before 1944 and in 586 the Dominican Republic before 1975; and for Canary Islands before 587 1946, for Guinea-Bissau before 1975, for Iceland before 1969, for 588 Indian Summer Time before 1942, for Indonesia before around 1964, 589 for Kenya before 1960, for Liberia before 1973, for Madeira before 590 1967, for Namibia before 1943, for the Netherlands in 1937-9, for 591 Pakistan before 1971, for Western Sahara before 1977, and for 592 Zaporozhye in 1880-1924. 593 594 For Alaska time from 1900 through 1967, instead of "CAT" use the 595 abbreviation "AST", the abbreviation commonly used at the time 596 (Atlantic Standard Time had not been standardized yet). Use "AWT" 597 and "APT" instead of the invented abbreviations "CAWT" and "CAPT". 598 599 Use "CST" and "CDT" instead of invented abbreviations for Macau 600 before 1999 and Taiwan before 1938, and use "JST" instead of the 601 invented abbreviation "JCST" for Japan and Korea before 1938. 602 603 Change to database entry category 604 605 Move the Pacific/Johnston link from 'australasia' to 'backward', 606 since Johnston is now uninhabited. 607 608 Changes to code 609 610 zic no longer mishandles some transitions in January 2038 when it 611 attempts to work around Qt bug 53071. This fixes a bug affecting 612 Pacific/Tongatapu that was introduced in zic 2016e. localtime.c 613 now contains a workaround, useful when loading a file generated by 614 a buggy zic. (Problem and localtime.c fix reported by Bradley 615 White.) 616 617 zdump -i now outputs non-hour numeric time zone abbreviations 618 without a colon, e.g., "+0530" rather than "+05:30". This agrees 619 with zic %z and with common practice, and simplifies auditing of 620 zdump output. 621 622 zdump is now buildable again with -DUSE_LTZ=0. 623 (Problem reported by Joseph Myers.) 624 625 zdump.c now always includes private.h, to avoid code duplication 626 with private.h. (Problem reported by Kees Dekker.) 627 628 localtime.c no longer mishandles early or late timestamps 629 when TZ is set to a POSIX-style string that specifies DST. 630 (Problem reported by Kees Dekker.) 631 632 date and strftime now cause %z to generate "-0000" instead of 633 "+0000" when the UT offset is zero and the time zone abbreviation 634 begins with "-". 635 636 Changes to documentation and commentary 637 638 The 'Theory' file now better documents choice of historical time 639 zone abbreviations. (Problems reported by Michael Deckers.) 640 641 tz-link.htm now covers leap smearing, which is popular in clouds. 642 643 644 Release 2016j - 2016-11-22 23:17:13 -0800 645 646 Briefly: Saratov, Russia moves from +03 to +04 on 2016-12-04. 647 648 Changes to future time stamps 649 650 Saratov, Russia switches from +03 to +04 on 2016-12-04 at 02:00. 651 This hives off a new zone Europe/Saratov from Europe/Volgograd. 652 (Thanks to Yuri Konotopov and Stepan Golosunov.) 653 654 Changes to past time stamps 655 656 The new zone Asia/Atyrau for Atyra Region, Kazakhstan, is like 657 Asia/Aqtau except it switched from +05/+06 to +04/+05 in spring 658 1999, not fall 1994. (Thanks to Stepan Golosunov.) 659 660 Changes to past time zone abbreviations 661 662 Asia/Gaza and Asia/Hebron now use "EEST", not "EET", to denote 663 summer time before 1948. The old use of "EET" was a typo. 664 665 Changes to code 666 667 zic no longer mishandles file systems that lack hard links, fixing 668 bugs introduced in 2016g. (Problems reported by Tom Lane.) 669 Also, when the destination already contains symbolic links, zic 670 should now work better on systems where the 'link' system call 671 does not follow symbolic links. 672 673 Changes to documentation and commentary 674 675 tz-link.htm now documents the relationship between release version 676 numbers and development-repository commit tags. (Suggested by 677 Paul Koning.) 678 679 The 'Theory' file now documents UT. 680 681 iso3166.tab now accents "Curaao", and commentary now mentions 682 the names "Cabo Verde" and "Czechia". (Thanks to Ji Boh.) 683 684 685 Release 2016i - 2016-11-01 23:19:52 -0700 686 687 Briefly: Cyprus split into two time zones on 2016-10-30, and Tonga 688 reintroduces DST on 2016-11-06. 689 690 Changes to future time stamps 691 692 Pacific/Tongatapu begins DST on 2016-11-06 at 02:00, ending on 693 2017-01-15 at 03:00. Assume future observances in Tonga will be 694 from the first Sunday in November through the third Sunday in 695 January, like Fiji. (Thanks to Pulu Anau.) Switch to numeric 696 time zone abbreviations for this zone. 697 698 Changes to past and future time stamps 699 700 Northern Cyprus is now +03 year round, causing a split in Cyprus 701 time zones starting 2016-10-30 at 04:00. This creates a zone 702 Asia/Famagusta. (Thanks to Even Scharning and Matt Johnson.) 703 704 Antarctica/Casey switched from +08 to +11 on 2016-10-22. 705 (Thanks to Steffen Thorsen.) 706 707 Changes to past time stamps 708 709 Several corrections were made for pre-1975 time stamps in Italy. 710 These affect Europe/Malta, Europe/Rome, Europe/San_Marino, and 711 Europe/Vatican. 712 713 First, the 1893-11-01 00:00 transition in Italy used the new UT 714 offset (+01), not the old (+00:49:56). (Thanks to Michael 715 Deckers.) 716 717 Second, rules for daylight saving in Italy were changed to agree 718 with Italy's National Institute of Metrological Research (INRiM) 719 except for 1944, as follows (thanks to Pierpaolo Bernardi, Brian 720 Inglis, and Michael Deckers): 721 722 The 1916-06-03 transition was at 24:00, not 00:00. 723 724 The 1916-10-01, 1919-10-05, and 1920-09-19 transitions were at 725 00:00, not 01:00. 726 727 The 1917-09-30 and 1918-10-06 transitions were at 24:00, not 728 01:00. 729 730 The 1944-09-17 transition was at 03:00, not 01:00. This 731 particular change is taken from Italian law as INRiM's table, 732 (which says 02:00) appears to have a typo here. Also, keep the 733 1944-04-03 transition for Europe/Rome, as Rome was controlled by 734 Germany then. 735 736 The 1967-1970 and 1972-1974 fallback transitions were at 01:00, 737 not 00:00. 738 739 Changes to code 740 741 The code should now be buildable on AmigaOS merely by setting the 742 appropriate Makefile variables. (From a patch by Carsten Larsen.) 743 744 745 Release 2016h - 2016-10-19 23:17:57 -0700 746 747 Changes to future time stamps 748 749 Asia/Gaza and Asia/Hebron end DST on 2016-10-29 at 01:00, not 750 2016-10-21 at 00:00. (Thanks to Sharef Mustafa.) Predict that 751 future fall transitions will be on the last Saturday of October 752 at 01:00, which is consistent with predicted spring transitions 753 on the last Saturday of March. (Thanks to Tim Parenti.) 754 755 Changes to past time stamps 756 757 In Turkey, transitions in 1986-1990 were at 01:00 standard time 758 not at 02:00, and the spring 1994 transition was on March 20, not 759 March 27. (Thanks to Kvan Yazan.) 760 761 Changes to past and future time zone abbreviations 762 763 Asia/Colombo now uses numeric time zone abbreviations like "+0530" 764 instead of alphabetic ones like "IST" and "LKT". Various 765 English-language sources use "IST", "LKT" and "SLST", with no 766 working consensus. (Usage of "SLST" mentioned by Sadika 767 Sumanapala.) 768 769 Changes to code 770 771 zic no longer mishandles relativizing file names when creating 772 symbolic links like /etc/localtime, when these symbolic links 773 are outside the usual directory hierarchy. This fixes a bug 774 introduced in 2016g. (Problem reported by Andreas Stieger.) 775 776 Changes to build procedure 777 778 New rules 'traditional_tarballs' and 'traditional_signatures' for 779 building just the traditional-format distribution. (Requested by 780 Deborah Goldsmith.) 781 782 The file 'version' is now put into the tzdata tarball too. 783 (Requested by Howard Hinnant.) 784 785 Changes to documentation and commentary 786 787 The 'Theory' file now has a section on interface stability. 788 (Requested by Paul Koning.) It also mentions features like 789 tm_zone and localtime_rz that have long been supported by the 790 reference code. 791 792 tz-link.htm has improved coverage of time zone boundaries suitable 793 for geolocation. (Thanks to heads-ups from Evan Siroky and Matt 794 Johnson.) 795 796 The US commentary now mentions Allen and the "day of two noons". 797 798 The Fiji commentary mentions the government's 2016-10-03 press 799 release. (Thanks to Raymond Kumar.) 800 801 802 Release 2016g - 2016-09-13 08:56:38 -0700 803 804 Changes to future time stamps 805 806 Turkey switched from EET/EEST (+02/+03) to permanent +03, 807 effective 2016-09-07. (Thanks to Burak AYDIN.) Use "+03" rather 808 than an invented abbreviation for the new time. 809 810 New leap second 2016-12-31 23:59:60 UTC as per IERS Bulletin C 52. 811 (Thanks to Tim Parenti.) 812 813 Changes to past time stamps 814 815 For America/Los_Angeles, spring-forward transition times have been 816 corrected from 02:00 to 02:01 in 1948, and from 02:00 to 01:00 in 817 1950-1966. 818 819 For zones using Soviet time on 1919-07-01, transitions to UT-based 820 time were at 00:00 UT, not at 02:00 local time. The affected 821 zones are Europe/Kirov, Europe/Moscow, Europe/Samara, and 822 Europe/Ulyanovsk. (Thanks to Alexander Belopolsky.) 823 824 Changes to past and future time zone abbreviations 825 826 The Factory zone now uses the time zone abbreviation -00 instead 827 of a long English-language string, as -00 is now the normal way to 828 represent an undefined time zone. 829 830 Several zones in Antarctica and the former Soviet Union, along 831 with zones intended for ships at sea that cannot use POSIX TZ 832 strings, now use numeric time zone abbreviations instead of 833 invented or obsolete alphanumeric abbreviations. The affected 834 zones are Antarctica/Casey, Antarctica/Davis, 835 Antarctica/DumontDUrville, Antarctica/Mawson, Antarctica/Rothera, 836 Antarctica/Syowa, Antarctica/Troll, Antarctica/Vostok, 837 Asia/Anadyr, Asia/Ashgabat, Asia/Baku, Asia/Bishkek, Asia/Chita, 838 Asia/Dushanbe, Asia/Irkutsk, Asia/Kamchatka, Asia/Khandyga, 839 Asia/Krasnoyarsk, Asia/Magadan, Asia/Omsk, Asia/Sakhalin, 840 Asia/Samarkand, Asia/Srednekolymsk, Asia/Tashkent, Asia/Tbilisi, 841 Asia/Ust-Nera, Asia/Vladivostok, Asia/Yakutsk, Asia/Yekaterinburg, 842 Asia/Yerevan, Etc/GMT-14, Etc/GMT-13, Etc/GMT-12, Etc/GMT-11, 843 Etc/GMT-10, Etc/GMT-9, Etc/GMT-8, Etc/GMT-7, Etc/GMT-6, Etc/GMT-5, 844 Etc/GMT-4, Etc/GMT-3, Etc/GMT-2, Etc/GMT-1, Etc/GMT+1, Etc/GMT+2, 845 Etc/GMT+3, Etc/GMT+4, Etc/GMT+5, Etc/GMT+6, Etc/GMT+7, Etc/GMT+8, 846 Etc/GMT+9, Etc/GMT+10, Etc/GMT+11, Etc/GMT+12, Europe/Kaliningrad, 847 Europe/Minsk, Europe/Samara, Europe/Volgograd, and 848 Indian/Kerguelen. For Europe/Moscow the invented abbreviation MSM 849 was replaced by +05, whereas MSK and MSD were kept as they are not 850 our invention and are widely used. 851 852 Changes to zone names 853 854 Rename Asia/Rangoon to Asia/Yangon, with a backward compatibility link. 855 (Thanks to David Massoud.) 856 857 Changes to code 858 859 zic no longer generates binary files containing POSIX TZ-like 860 strings that disagree with the local time type after the last 861 explicit transition in the data. This fixes a bug with 862 Africa/Casablanca and Africa/El_Aaiun in some year-2037 time 863 stamps on the reference platform. (Thanks to Alexander Belopolsky 864 for reporting the bug and suggesting a way forward.) 865 866 If the installed localtime and/or posixrules files are symbolic 867 links, zic now keeps them symbolic links when updating them, for 868 compatibility with platforms like OpenSUSE where other programs 869 configure these files as symlinks. 870 871 zic now avoids hard linking to symbolic links, avoids some 872 unnecessary mkdir and stat system calls, and uses shorter file 873 names internally. 874 875 zdump has a new -i option to generate transitions in a 876 more-compact but still human-readable format. This option is 877 experimental, and the output format may change in future versions. 878 (Thanks to Jon Skeet for suggesting that an option was needed, 879 and thanks to Tim Parenti and Chris Rovick for further comments.) 880 881 Changes to build procedure 882 883 An experimental distribution format is available, in addition 884 to the traditional format which will continue to be distributed. 885 The new format is a tarball tzdb-VERSION.tar.lz with signature 886 file tzdb-VERSION.tar.lz.asc. It unpacks to a top-level directory 887 tzdb-VERSION containing the code and data of the traditional 888 two-tarball format, along with extra data that may be useful. 889 (Thanks to Antonio Diaz Diaz, Oscar van Vlijmen, and many others 890 for comments about the experimental format.) 891 892 The release version number is now more accurate in the usual case 893 where releases are built from a Git repository. For example, if 894 23 commits and some working-file changes have been made since 895 release 2016g, the version number is now something like 896 '2016g-23-g50556e3-dirty' instead of the misleading '2016g'. 897 Tagged releases use the same version number format as before, 898 e.g., '2016g'. To support the more-accurate version number, its 899 specification has moved from a line in the Makefile to a new 900 source file 'version'. 901 902 The experimental distribution contains a file to2050.tzs that 903 contains what should be the output of 'zdump -i -c 2050' on 904 primary zones. If this file is available, 'make check' now checks 905 that zdump generates this output. 906 907 'make check_web' now works on Fedora-like distributions. 908 909 Changes to documentation and commentary 910 911 tzfile.5 now documents the new restriction on POSIX TZ-like 912 strings that is now implemented by zic. 913 914 Comments now cite URLs for some 1917-1921 Russian DST decrees. 915 (Thanks to Alexander Belopolsky.) 916 917 tz-link.htm mentions JuliaTime (thanks to Curtis Vogt) and Time4J 918 (thanks to Meno Hochschild) and ThreeTen-Extra, and its 919 description of Java 8 has been brought up to date (thanks to 920 Stephen Colebourne). Its description of local time on Mars has 921 been updated to match current practice, and URLs have been updated 922 and some obsolete ones removed. 923 924 925 Release 2016f - 2016-07-05 16:26:51 +0200 926 927 Changes affecting future time stamps 928 929 The Egyptian government changed its mind on short notice, and 930 Africa/Cairo will not introduce DST starting 2016-07-07 after all. 931 (Thanks to Mina Samuel.) 932 933 Asia/Novosibirsk switches from +06 to +07 on 2016-07-24 at 02:00. 934 (Thanks to Stepan Golosunov.) 935 936 Changes to past and future time stamps 937 938 Asia/Novokuznetsk and Asia/Novosibirsk now use numeric time zone 939 abbreviations instead of invented ones. 940 941 Changes affecting past time stamps 942 943 Europe/Minsk's 1992-03-29 spring-forward transition was at 02:00 not 00:00. 944 (Thanks to Stepan Golosunov.) 945 946 947 Release 2016e - 2016-06-14 08:46:16 -0700 948 949 Changes affecting future time stamps 950 951 Africa/Cairo observes DST in 2016 from July 7 to the end of October. 952 Guess October 27 and 24:00 transitions. (Thanks to Steffen Thorsen.) 953 For future years, guess April's last Thursday to October's last 954 Thursday except for Ramadan. 955 956 Changes affecting past time stamps 957 958 Locations while uninhabited now use '-00', not 'zzz', as a 959 placeholder time zone abbreviation. This is inspired by Internet 960 RFC 3339 and is more consistent with numeric time zone 961 abbreviations already used elsewhere. The change affects several 962 arctic and antarctic locations, e.g., America/Cambridge_Bay before 963 1920 and Antarctica/Troll before 2005. 964 965 Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was 966 at 03:00, not 23:00 the previous day. (Thanks to Michael Deckers.) 967 968 Changes to code 969 970 zic now outputs a dummy transition at time 2**31 - 1 in zones 971 whose POSIX-style TZ strings contain a '<'. This mostly works 972 around Qt bug 53071 <https://bugreports.qt.io/browse/QTBUG-53071>. 973 (Thanks to Zhanibek Adilbekov for reporting the Qt bug.) 974 975 Changes affecting documentation and commentary 976 977 tz-link.htm says why governments should give plenty of notice for 978 time zone or DST changes, and refers to Matt Johnson's blog post. 979 980 tz-link.htm mentions Tzdata for Elixir. (Thanks to Matt Johnson.) 981 982 983 Release 2016d - 2016-04-17 22:50:29 -0700 984 985 Changes affecting future time stamps 986 987 America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30. 988 (Thanks to Alexander Krivenyshev for the heads-up.) 989 990 Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00. 991 (Thanks to Alexander Krivenyshev and Matt Johnson.) 992 993 New zone Asia/Tomsk, split off from Asia/Novosibirsk. It covers 994 Tomsk Oblast, Russia, which switches from +06 to +07 on 2016-05-29 995 at 02:00. (Thanks to Stepan Golosunov.) 996 997 Changes affecting past time stamps 998 999 New zone Europe/Kirov, split off from Europe/Volgograd. It covers 1000 Kirov Oblast, Russia, which switched from +04/+05 to +03/+04 on 1001 1989-03-26 at 02:00, roughly a year after Europe/Volgograd made 1002 the same change. (Thanks to Stepan Golosunov.) 1003 1004 Russia and nearby locations had daylight-saving transitions on 1005 1992-03-29 at 02:00 and 1992-09-27 at 03:00, instead of on 1006 1992-03-28 at 23:00 and 1992-09-26 at 23:00. (Thanks to Stepan 1007 Golosunov.) 1008 1009 Many corrections to historical time in Kazakhstan from 1991 1010 through 2005. (Thanks to Stepan Golosunov.) Replace Kazakhstan's 1011 invented time zone abbreviations with numeric abbreviations. 1012 1013 Changes to commentary 1014 1015 Mention Internet RFCs 7808 (TZDIST) and 7809 (CalDAV time zone references). 1016 1017 1018 Release 2016c - 2016-03-23 00:51:27 -0700 1019 1020 Changes affecting future time stamps 1021 1022 Azerbaijan no longer observes DST. (Thanks to Steffen Thorsen.) 1023 1024 Chile reverts from permanent to seasonal DST. (Thanks to Juan 1025 Correa for the heads-up, and to Tim Parenti for corrections.) 1026 Guess that future transitions are August's and May's second 1027 Saturdays at 24:00 mainland time. Also, call the period from 1028 2014-09-07 through 2016-05-14 daylight saving time instead of 1029 standard time, as that seems more appropriate now. 1030 1031 Changes affecting past time stamps 1032 1033 Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to 1034 +02/+03 on 1989-03-26, not 1991-03-31. Europe/Volgograd changed 1035 from +04/+05 to +03/+04 on 1988-03-27, not 1989-03-26. 1036 (Thanks to Stepan Golosunov.) 1037 1038 Changes to commentary 1039 1040 Several updates and URLs for historical and proposed Russian changes. 1041 (Thanks to Stepan Golosunov, Matt Johnson, and Alexander Krivenyshev.) 1042 1043 1044 Release 2016b - 2016-03-12 17:30:14 -0800 1045 1046 Compatibility note 1047 1048 Starting with release 2016b, some data entries cause zic implementations 1049 derived from tz releases 2005j through 2015e to issue warnings like 1050 "time zone abbreviation differs from POSIX standard (+03)". 1051 These warnings should not otherwise affect zic's output and can safely be 1052 ignored on today's platforms, as the warnings refer to a restriction in 1053 POSIX.1-1988 that was removed in POSIX.1-2001. One way to suppress the 1054 warnings is to upgrade to zic derived from tz releases 2015f and later. 1055 1056 Changes affecting future time stamps 1057 1058 New zones Europe/Astrakhan and Europe/Ulyanovsk for Astrakhan and 1059 Ulyanovsk Oblasts, Russia, both of which will switch from +03 to +04 on 1060 2016-03-27 at 02:00 local time. They need distinct zones since their 1061 post-1970 histories disagree. New zone Asia/Barnaul for Altai Krai and 1062 Altai Republic, Russia, which will switch from +06 to +07 on the same date 1063 and local time. The Astrakhan change is already official; the others have 1064 passed the first reading in the State Duma and are extremely likely. 1065 Also, Asia/Sakhalin moves from +10 to +11 on 2016-03-27 at 02:00. 1066 (Thanks to Alexander Krivenyshev for the heads-up, and to Matt Johnson 1067 and Stepan Golosunov for followup.) 1068 1069 As a trial of a new system that needs less information to be made up, 1070 the new zones use numeric time zone abbreviations like "+04" 1071 instead of invented abbreviations like "ASTT". 1072 1073 Haiti will not observe DST in 2016. (Thanks to Jean Antoine via 1074 Steffen Thorsen.) 1075 1076 Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00. 1077 (Thanks to Hannah Kreitem.) Guess future transitions will be March's last 1078 Saturday at 01:00, not March's last Friday at 24:00. 1079 1080 Changes affecting past time stamps 1081 1082 Europe/Chisinau observed DST during 1990, and switched from +04 to 1083 +03 at 1990-05-06 02:00, instead of switching from +03 to +02. 1084 (Thanks to Stepan Golosunov.) 1085 1086 1991 abbreviations in Europe/Samara should be SAMT/SAMST, not 1087 KUYT/KUYST. (Thanks to Stepan Golosunov.) 1088 1089 Changes to code 1090 1091 tzselect's diagnostics and checking, and checktab.awk's checking, 1092 have been improved. (Thanks to J William Piggott.) 1093 1094 tzcode now builds under MinGW. (Thanks to Ian Abbott and Esben Haabendal.) 1095 1096 tzselect now tests Julian-date TZ settings more accurately. 1097 (Thanks to J William Piggott.) 1098 1099 Changes to commentary 1100 1101 Comments in zone tables have been improved. (Thanks to J William Piggott.) 1102 1103 tzselect again limits its menu comments so that menus fit on a 1104 2480 alphanumeric display. 1105 1106 A new web page tz-how-to.html. (Thanks to Bill Seymour.) 1107 1108 In the Theory file, the description of possible time zone abbreviations in 1109 tzdata has been cleaned up, as the old description was unclear and 1110 inconsistent. (Thanks to Alain Mouette for reporting the problem.) 1111 1112 1113 Release 2016a - 2016-01-26 23:28:02 -0800 1114 1115 Changes affecting future time stamps 1116 1117 America/Cayman will not observe daylight saving this year after all. 1118 Revert our guess that it would. (Thanks to Matt Johnson.) 1119 1120 Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00. 1121 (Thanks to Alexander Krivenyshev.) 1122 1123 Asia/Tehran now has DST predictions for the year 2038 and later, 1124 to be March 21 00:00 to September 21 00:00. This is likely better 1125 than predicting no DST, albeit off by a day every now and then. 1126 1127 Changes affecting past and future time stamps 1128 1129 America/Metlakatla switched from PST all year to AKST/AKDT on 1130 2015-11-01 at 02:00. (Thanks to Steffen Thorsen.) 1131 1132 America/Santa_Isabel has been removed, and replaced with a 1133 backward compatibility link to America/Tijuana. Its contents were 1134 apparently based on a misreading of Mexican legislation. 1135 1136 Changes affecting past time stamps 1137 1138 Asia/Karachi's two transition times in 2002 were off by a minute. 1139 (Thanks to Matt Johnson.) 1140 1141 Changes affecting build procedure 1142 1143 An installer can now combine leap seconds with use of the backzone file, 1144 e.g., with 'make PACKRATDATA=backzone REDO=posix_right zones'. 1145 The old 'make posix_packrat' rule is now marked as obsolescent. 1146 (Thanks to Ian Abbott for an initial implementation.) 1147 1148 Changes affecting documentation and commentary 1149 1150 A new file LICENSE makes it easier to see that the code and data 1151 are mostly public-domain. (Thanks to James Knight.) The three 1152 non-public-domain files now use the current (3-clause) BSD license 1153 instead of older versions of that license. 1154 1155 tz-link.htm mentions the BDE library (thanks to Andrew Paprocki), 1156 CCTZ (thanks to Tim Parenti), TimeJones.com, and has a new section 1157 on editing tz source files (with a mention of Sublime zoneinfo, 1158 thanks to Gilmore Davidson). 1159 1160 The Theory and asia files now mention the 2015 book "The Global 1161 Transformation of Time, 1870-1950", and cite a couple of reviews. 1162 1163 The America/Chicago entry now documents the informal use of US 1164 central time in Fort Pierre, South Dakota. (Thanks to Rick 1165 McDermid, Matt Johnson, and Steve Jones.) 1166 1167 1168 Release 2015g - 2015-10-01 00:39:51 -0700 1169 1170 Changes affecting future time stamps 1171 1172 Turkey's 2015 fall-back transition is scheduled for Nov. 8, not Oct. 25. 1173 (Thanks to Fatih.) 1174 1175 Norfolk moves from +1130 to +1100 on 2015-10-04 at 02:00 local time. 1176 (Thanks to Alexander Krivenyshev.) 1177 1178 Fiji's 2016 fall-back transition is scheduled for January 17, not 24. 1179 (Thanks to Ken Rylander.) 1180 1181 Fort Nelson, British Columbia will not fall back on 2015-11-01. It has 1182 effectively been on MST (-0700) since it advanced its clocks on 2015-03-08. 1183 New zone America/Fort_Nelson. (Thanks to Matt Johnson.) 1184 1185 Changes affecting past time stamps 1186 1187 Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00. 1188 1189 Changes affecting code 1190 1191 localtime no longer mishandles America/Anchorage after 2037. 1192 (Thanks to Bradley White for reporting the bug.) 1193 1194 On hosts with signed 32-bit time_t, localtime no longer mishandles 1195 Pacific/Fiji after 2038-01-16 14:00 UTC. 1196 1197 The localtime module allows the variables 'timezone', 'daylight', 1198 and 'altzone' to be in common storage shared with other modules, 1199 and declares them in case the system <time.h> does not. 1200 (Problems reported by Kees Dekker.) 1201 1202 On platforms with tm_zone, strftime.c now assumes it is not NULL. 1203 This simplifies the code and is consistent with zdump.c. 1204 (Problem reported by Christos Zoulas.) 1205 1206 Changes affecting documentation 1207 1208 The tzfile man page now documents that transition times denote the 1209 starts (not the ends) of the corresponding time periods. 1210 (Ambiguity reported by Bill Seymour.) 1211 1212 1213 Release 2015f - 2015-08-10 18:06:56 -0700 1214 1215 Changes affecting future time stamps 1216 1217 North Korea switches to +0830 on 2015-08-15. (Thanks to Steffen Thorsen.) 1218 The abbreviation remains "KST". (Thanks to Robert Elz.) 1219 1220 Uruguay no longer observes DST. (Thanks to Steffen Thorsen 1221 and Pablo Camargo.) 1222 1223 Changes affecting past and future time stamps 1224 1225 Moldova starts and ends DST at 00:00 UTC, not at 01:00 UTC. 1226 (Thanks to Roman Tudos.) 1227 1228 Changes affecting data format and code 1229 1230 zic's '-y YEARISTYPE' option is no longer documented. The TYPE 1231 field of a Rule line should now be '-'; the old values 'even', 1232 'odd', 'uspres', 'nonpres', 'nonuspres' were already undocumented. 1233 Although the implementation has not changed, these features do not 1234 work in the default installation, they are not used in the data, 1235 and they are now considered obsolescent. 1236 1237 zic now checks that two rules don't take effect at the same time. 1238 (Thanks to Jon Skeet and Arthur David Olson.) Constraints on 1239 simultaneity are now documented. 1240 1241 The two characters '%z' in a zone format now stand for the UT 1242 offset, e.g., '-07' for seven hours behind UT and '+0530' for 1243 five hours and thirty minutes ahead. This better supports time 1244 zone abbreviations conforming to POSIX.1-2001 and later. 1245 1246 Changes affecting installed data files 1247 1248 Comments for America/Halifax and America/Glace_Bay have been improved. 1249 (Thanks to Brian Inglis.) 1250 1251 Data entries have been simplified for Atlantic/Canary, Europe/Simferopol, 1252 Europe/Sofia, and Europe/Tallinn. This yields slightly smaller 1253 installed data files for Europe/Simferopol and Europe/Tallinn. 1254 It does not affect timestamps. (Thanks to Howard Hinnant.) 1255 1256 Changes affecting code 1257 1258 zdump and zic no longer warn about valid time zone abbreviations 1259 like '-05'. 1260 1261 Some Visual Studio 2013 warnings have been suppressed. 1262 (Thanks to Kees Dekker.) 1263 1264 'date' no longer sets the time of day and its -a, -d, -n and -t 1265 options have been removed. Long obsolescent, the implementation 1266 of these features had porting problems. Builders no longer need 1267 to configure HAVE_ADJTIME, HAVE_SETTIMEOFDAY, or HAVE_UTMPX_H. 1268 (Thanks to Kees Dekker for pointing out the problem.) 1269 1270 Changes affecting documentation 1271 1272 The Theory file mentions naming issues earlier, as these seem to be 1273 poorly publicized (thanks to Gilmore Davidson for reporting the problem). 1274 1275 tz-link.htm mentions Time Zone Database Parser (thanks to Howard Hinnant). 1276 1277 Mention that Herbert Samuel introduced the term "Summer Time". 1278 1279 1280 Release 2015e - 2015-06-13 10:56:02 -0700 1281 1282 Changes affecting future time stamps 1283 1284 Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00, 1285 not 06-13 and 07-18 as we had guessed. (Thanks to Milamber.) 1286 1287 Assume Cayman Islands will observe DST starting next year, using US rules. 1288 Although it isn't guaranteed, it is the most likely. 1289 1290 Changes affecting data format 1291 1292 The file 'iso3166.tab' now uses UTF-8, so that its entries can better 1293 spell the names of land Islands, Cte d'Ivoire, and Runion. 1294 1295 Changes affecting code 1296 1297 When displaying data, tzselect converts it to the current locale's 1298 encoding if the iconv command works. (Problem reported by random832.) 1299 1300 tzselect no longer mishandles Dominica, fixing a bug introduced 1301 in Release 2014f. (Problem reported by Owen Leibman.) 1302 1303 zic -l no longer fails when compiled with -DTZDEFAULT=\"/etc/localtime\". 1304 This fixes a bug introduced in Release 2014f. 1305 (Problem reported by Leonardo Chiquitto.) 1306 1307 1308 Release 2015d - 2015-04-24 08:09:46 -0700 1309 1310 Changes affecting future time stamps 1311 1312 Egypt will not observe DST in 2015 and will consider canceling it 1313 permanently. For now, assume no DST indefinitely. 1314 (Thanks to Ahmed Nazmy and Tim Parenti.) 1315 1316 Changes affecting past time stamps 1317 1318 America/Whitehorse switched from UT -09 to -08 on 1967-05-28, not 1319 1966-07-01. Also, Yukon's time zone history is documented better. 1320 (Thanks to Brian Inglis and Dennis Ferguson.) 1321 1322 Change affecting past and future time zone abbreviations 1323 1324 The abbreviations for Hawaii-Aleutian standard and daylight times 1325 have been changed from HAST/HADT to HST/HDT, as per US Government 1326 Printing Office style. This affects only America/Adak since 1983, 1327 as America/Honolulu was already using the new style. 1328 1329 Changes affecting code 1330 1331 zic has some minor performance improvements. 1332 1333 1334 Release 2015c - 2015-04-11 08:55:55 -0700 1335 1336 Changes affecting future time stamps 1337 1338 Egypt's spring-forward transition is at 24:00 on April's last Thursday, 1339 not 00:00 on April's last Friday. 2015's transition will therefore be on 1340 Thursday, April 30 at 24:00, not Friday, April 24 at 00:00. Similar fixes 1341 apply to 2026, 2037, 2043, etc. (Thanks to Steffen Thorsen.) 1342 1343 Changes affecting past time stamps 1344 1345 The following changes affect some pre-1991 Chile-related time stamps 1346 in America/Santiago, Antarctica/Palmer, and Pacific/Easter. 1347 1348 The 1910 transition was January 10, not January 1. 1349 1350 The 1918 transition was September 10, not September 1. 1351 1352 The UT -04 time observed from 1932 to 1942 is now considered to 1353 be standard time, not year-round DST. 1354 1355 Santiago observed DST (UT -03) from 1946-07-15 through 1356 1946-08-31, then reverted to standard time, then switched to -05 1357 on 1947-04-01. 1358 1359 Assume transitions before 1968 were at 00:00, since we have no data 1360 saying otherwise. 1361 1362 The spring 1988 transition was 1988-10-09, not 1988-10-02. 1363 The fall 1990 transition was 1990-03-11, not 1990-03-18. 1364 1365 Assume no UT offset change for Pacific/Easter on 1890-01-01, 1366 and omit all transitions on Pacific/Easter from 1942 through 1946 1367 since we have no data suggesting that they existed. 1368 1369 One more zone has been turned into a link, as it differed 1370 from an existing zone only for older time stamps. As usual, 1371 this change affects UT offsets in pre-1970 time stamps only. 1372 The zone's old contents have been moved to the 'backzone' file. 1373 The affected zone is America/Montreal. 1374 1375 Changes affecting commentary 1376 1377 Mention the TZUpdater tool. 1378 1379 Mention "The Time Now". (Thanks to Brandon Ramsey.) 1380 1381 1382 Release 2015b - 2015-03-19 23:28:11 -0700 1383 1384 Changes affecting future time stamps 1385 1386 Mongolia will start observing DST again this year, from the last 1387 Saturday in March at 02:00 to the last Saturday in September at 00:00. 1388 (Thanks to Ganbold Tsagaankhuu.) 1389 1390 Palestine will start DST on March 28, not March 27. Also, 1391 correct the fall 2014 transition from September 26 to October 24. 1392 Adjust future predictions accordingly. (Thanks to Steffen Thorsen.) 1393 1394 Changes affecting past time stamps 1395 1396 The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a 1397 regression. (Thanks to Stuart Bishop for reporting the problem.) 1398 1399 Some more zones have been turned into links, when they differed 1400 from existing zones only for older time stamps. As usual, 1401 these changes affect UT offsets in pre-1970 time stamps only. 1402 Their old contents have been moved to the 'backzone' file. 1403 The affected zones are: America/Antigua, America/Cayman, 1404 Pacific/Midway, and Pacific/Saipan. 1405 1406 Changes affecting time zone abbreviations 1407 1408 Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD". 1409 (Thanks to Hank W.) 1410 1411 Changes affecting code 1412 1413 Fix integer overflow bug in reference 'mktime' implementation. 1414 (Problem reported by Jrg Richter.) 1415 1416 Allow -Dtime_tz=time_t compilations, and allow -Dtime_tz=... libraries 1417 to be used in the same executable as standard-library time_t functions. 1418 (Problems reported by Bradley White.) 1419 1420 Changes affecting commentary 1421 1422 Cite the recent Mexican decree changing Quintana Roo's time zone. 1423 (Thanks to Carlos Ral Perasso.) 1424 1425 Likewise for the recent Chilean decree. (Thanks to Eduardo Romero Urra.) 1426 1427 Update info about Mars time. 1428 1429 1430 Release 2015a - 2015-01-29 22:35:20 -0800 1431 1432 Changes affecting future time stamps 1433 1434 The Mexican state of Quintana Roo, represented by America/Cancun, 1435 will shift from Central Time with DST to Eastern Time without DST 1436 on 2015-02-01 at 02:00. (Thanks to Steffen Thorsen and Gwillim Law.) 1437 1438 Chile will not change clocks in April or thereafter; its new standard time 1439 will be its old daylight saving time. This affects America/Santiago, 1440 Pacific/Easter, and Antarctica/Palmer. (Thanks to Juan Correa.) 1441 1442 New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49. 1443 (Thanks to Tim Parenti.) 1444 1445 Changes affecting past time stamps 1446 1447 Iceland observed DST in 1919 and 1921, and its 1939 fallback 1448 transition was Oct. 29, not Nov. 29. Remove incorrect data from 1449 Shanks about time in Iceland between 1837 and 1908. 1450 1451 Some more zones have been turned into links, when they differed 1452 from existing zones only for older time stamps. As usual, 1453 these changes affect UT offsets in pre-1970 time stamps only. 1454 Their old contents have been moved to the 'backzone' file. 1455 The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait, 1456 and Asia/Muscat. 1457 1458 Changes affecting code 1459 1460 tzalloc now scrubs time zone abbreviations compatibly with the way 1461 that tzset always has, by replacing invalid bytes with '_' and by 1462 shortening too-long abbreviations. 1463 1464 tzselect ports to POSIX awk implementations, no longer mishandles 1465 POSIX TZ settings when GNU awk is used, and reports POSIX TZ 1466 settings to the user. (Thanks to Stefan Kuhn.) 1467 1468 Changes affecting build procedure 1469 1470 'make check' now checks for links to links in the data. 1471 One such link (for Africa/Asmera) has been fixed. 1472 (Thanks to Stephen Colebourne for pointing out the problem.) 1473 1474 Changes affecting commentary 1475 1476 The leapseconds file commentary now mentions the expiration date. 1477 (Problem reported by Martin Burnicki.) 1478 1479 Update Mexican Library of Congress URL. 1480 1481 1482 Release 2014j - 2014-11-10 17:37:11 -0800 1483 1484 Changes affecting current and future time stamps 1485 1486 Turks & Caicos' switch from US eastern time to UT -04 year-round 1487 did not occur on 2014-11-02 at 02:00. It's currently scheduled 1488 for 2015-11-01 at 02:00. (Thanks to Chris Walton.) 1489 1490 Changes affecting past time stamps 1491 1492 Many pre-1989 time stamps have been corrected for Asia/Seoul and 1493 Asia/Pyongyang, based on sources for the Korean-language Wikipedia 1494 entry for time in Korea. (Thanks to Sanghyuk Jung.) Also, no 1495 longer guess that Pyongyang mimicked Seoul time after World War II, 1496 as this is politically implausible. 1497 1498 Some more zones have been turned into links, when they differed 1499 from existing zones only for older time stamps. As usual, 1500 these changes affect UT offsets in pre-1970 time stamps only. 1501 Their old contents have been moved to the 'backzone' file. 1502 The affected zones are: Africa/Addis_Ababa, Africa/Asmara, 1503 Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Kampala, 1504 Africa/Mogadishu, Indian/Antananarivo, Indian/Comoro, and 1505 Indian/Mayotte. 1506 1507 Changes affecting commentary 1508 1509 The commentary is less enthusiastic about Shanks as a source, 1510 and is more careful to distinguish UT from UTC. 1511 1512 1513 Release 2014i - 2014-10-21 22:04:57 -0700 1514 1515 Changes affecting future time stamps 1516 1517 Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00. 1518 (Thanks to Ken Rylander for the heads-up.) Guess that future 1519 years will use a similar pattern. 1520 1521 A new Zone Pacific/Bougainville, for the part of Papua New Guinea 1522 that plans to switch from UT +10 to +11 on 2014-12-28 at 02:00. 1523 (Thanks to Kiley Walbom for the heads-up.) 1524 1525 Changes affecting time zone abbreviations 1526 1527 Since Belarus is not changing its clocks even though Moscow is, 1528 the time zone abbreviation in Europe/Minsk is changing from FET 1529 to its more-traditional value MSK on 2014-10-26 at 01:00. 1530 (Thanks to Alexander Bokovoy for the heads-up about Belarus.) 1531 1532 The new abbreviation IDT stands for the pre-1976 use of UT +08 in 1533 Indochina, to distinguish it better from ICT (+07). 1534 1535 Changes affecting past time stamps 1536 1537 Many time stamps have been corrected for Asia/Ho_Chi_Minh before 1976 1538 (thanks to Trn Ngc Qun for an indirect pointer to Trn Tin Bnh's 1539 authoritative book). Asia/Ho_Chi_Minh has been added to 1540 zone1970.tab, to give tzselect users in Vietnam two choices, 1541 since north and south Vietnam disagreed after our 1970 cutoff. 1542 1543 Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as 1544 they differed from existing zones only for older time stamps. As 1545 usual, these changes affect pre-1970 time stamps only. Their old 1546 contents have been moved to the 'backzone' file. 1547 1548 Changes affecting code 1549 1550 The time-related library functions now set errno on failure, and 1551 some crashes in the new tzalloc-related library functions have 1552 been fixed. (Thanks to Christos Zoulas for reporting most of 1553 these problems and for suggesting fixes.) 1554 1555 If USG_COMPAT is defined and the requested timestamp is standard time, 1556 the tz library's localtime and mktime functions now set the extern 1557 variable timezone to a value appropriate for that timestamp; and 1558 similarly for ALTZONE, daylight saving time, and the altzone variable. 1559 This change is a companion to the tzname change in 2014h, and is 1560 designed to make timezone and altzone more compatible with tzname. 1561 1562 The tz library's functions now set errno to EOVERFLOW if they fail 1563 because the result cannot be represented. ctime and ctime_r now 1564 return NULL and set errno when a timestamp is out of range, rather 1565 than having undefined behavior. 1566 1567 Some bugs associated with the new 2014g functions have been fixed. 1568 This includes a bug that largely incapacitated the new functions 1569 time2posix_z and posix2time_z. (Thanks to Christos Zoulas.) 1570 It also includes some uses of uninitialized variables after tzalloc. 1571 The new code uses the standard type 'ssize_t', which the Makefile 1572 now gives porting advice about. 1573 1574 Changes affecting commentary 1575 1576 Updated URLs for NRC Canada (thanks to Matt Johnson and Brian Inglis). 1577 1578 1579 Release 2014h - 2014-09-25 18:59:03 -0700 1580 1581 Changes affecting past timestamps 1582 1583 America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28. 1584 1585 Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01, 1586 not 1920-01-06. The old entry was based on a misinterpretation of Shanks. 1587 1588 Some more zones have been turned into links, when they differed 1589 from existing zones only for older timestamps. As usual, 1590 these changes affect UT offsets in pre-1970 timestamps only. 1591 Their old contents have been moved to the 'backzone' file. 1592 The affected zones are: Africa/Blantyre, Africa/Bujumbura, 1593 Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi, 1594 Africa/Lusaka, Africa/Maseru, and Africa/Mbabane. 1595 1596 Changes affecting code 1597 1598 zdump -V and -v now output gmtoff= values on all platforms, 1599 not merely on platforms defining TM_GMTOFF. 1600 1601 The tz library's localtime and mktime functions now set tzname to a value 1602 appropriate for the requested timestamp, and zdump now uses this 1603 on platforms not defining TM_ZONE, fixing a 2014g regression. 1604 (Thanks to Tim Parenti for reporting the problem.) 1605 1606 The tz library no longer sets tzname if localtime or mktime fails. 1607 1608 zdump -c no longer mishandles transitions near year boundaries. 1609 (Thanks to Tim Parenti for reporting the problem.) 1610 1611 An access to uninitialized data has been fixed. 1612 (Thanks to Jrg Richter for reporting the problem.) 1613 1614 When THREAD_SAFE is defined, the code ports to the C11 memory model. 1615 A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined 1616 and two threads race to initialize data used by gmtime-like functions. 1617 (Thanks to Andy Heninger for reporting the problems.) 1618 1619 Changes affecting build procedure 1620 1621 'make check' now checks better for properly-sorted data. 1622 1623 Changes affecting documentation and commentary 1624 1625 zdump's gmtoff=N output is now documented, and its isdst=D output 1626 is now documented to possibly output D values other than 0 or 1. 1627 1628 zdump -c's treatment of years is now documented to use the 1629 Gregorian calendar and Universal Time without leap seconds, 1630 and its behavior at cutoff boundaries is now documented better. 1631 (Thanks to Arthur David Olson and Tim Parenti for reporting the problems.) 1632 1633 Programs are now documented to use the proleptic Gregorian calendar. 1634 (Thanks to Alan Barrett for the suggestion.) 1635 1636 Fractional-second GMT offsets have been documented for civil time 1637 in 19th-century Chennai, Jakarta, and New York. 1638 1639 1640 Release 2014g - 2014-08-28 12:31:23 -0700 1641 1642 Changes affecting future timestamps 1643 1644 Turks & Caicos is switching from US eastern time to UT -04 1645 year-round, modeled as a switch on 2014-11-02 at 02:00. 1646 [As noted in 2014j, this switch was later delayed.] 1647 1648 Changes affecting past timestamps 1649 1650 Time in Russia or the USSR before 1926 or so has been corrected by 1651 a few seconds in the following zones: Asia/Irkutsk, 1652 Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi, 1653 Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara. For 1654 Asia/Yekaterinburg the correction is a few minutes. (Thanks to 1655 Vladimir Karpinsky.) 1656 1657 The Portuguese decree of 1911-05-26 took effect on 1912-01-01. 1658 This affects 1911 timestamps in Africa/Bissau, Africa/Luanda, 1659 Atlantic/Azores, and Atlantic/Madeira. Also, Lisbon's pre-1912 1660 GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32. 1661 (Thanks to Stephen Colebourne for pointing to the decree.) 1662 1663 Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59. 1664 1665 A new file 'backzone' contains data which may appeal to 1666 connoisseurs of old timestamps, although it is out of scope for 1667 the tz database, is often poorly sourced, and contains some data 1668 that is known to be incorrect. The new file is not recommended 1669 for ordinary use and its entries are not installed by default. 1670 (Thanks to Lester Caine for the high-quality Jersey, Guernsey, and 1671 Isle of Man entries.) 1672 1673 Some more zones have been turned into links, when they differed 1674 from existing zones only for older timestamps. As usual, 1675 these changes affect UT offsets in pre-1970 timestamps only. 1676 Their old contents have been moved to the 'backzone' file. 1677 The affected zones are: Africa/Bangui, Africa/Brazzaville, 1678 Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda, 1679 Africa/Malabo, Africa/Niamey, and Africa/Porto-Novo. 1680 1681 Changes affecting code 1682 1683 Unless NETBSD_INSPIRED is defined to 0, the tz library now 1684 supplies functions for creating and using objects that represent 1685 time zones. The new functions are tzalloc, tzfree, localtime_rz, 1686 mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and 1687 time2posix_z. They are intended for performance: for example, 1688 localtime_rz (unlike localtime_r) is trivially thread-safe without 1689 locking. (Thanks to Christos Zoulas for proposing NetBSD-inspired 1690 functions, and to Alan Barrett and Jonathan Lennox for helping to 1691 debug the change.) 1692 1693 zdump now builds with the tz library unless USE_LTZ is defined to 0, 1694 This lets zdump use tz features even if the system library lacks them. 1695 To build zdump with the system library, use 'make CFLAGS=-DUSE_LTZ=0 1696 TZDOBJS=zdump.o CHECK_TIME_T_ALTERNATIVES='. 1697 1698 zdump now uses localtime_rz if available, as it's significantly faster, 1699 and it can help zdump better diagnose invalid time zone names. 1700 Define HAVE_LOCALTIME_RZ to 0 to suppress this. HAVE_LOCALTIME_RZ 1701 defaults to 1 if NETBSD_INSPIRED && USE_LTZ. When localtime_rz is 1702 not available, zdump now uses localtime_r and tzset if available, 1703 as this is a bit cleaner and faster than plain localtime. Compile 1704 with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system 1705 lacks these two functions. 1706 1707 If THREAD_SAFE is defined to 1, the tz library is now thread-safe. 1708 Although not needed for tz's own applications, which are single-threaded, 1709 this supports POSIX better if the tz library is used in multithreaded apps. 1710 1711 Some crashes have been fixed when zdump or the tz library is given 1712 invalid or outlandish input. 1713 1714 The tz library no longer mishandles leap seconds on platforms with 1715 unsigned time_t in time zones that lack ordinary transitions after 1970. 1716 1717 The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not 1718 already defined, to make it easier to configure on common platforms. 1719 Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this. 1720 1721 Unless the new macro UNINIT_TRAP is defined to 1, the tz code now 1722 assumes that reading uninitialized memory yields garbage values 1723 but does not cause other problems such as traps. 1724 1725 If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now 1726 more likely to guess right for ambiguous timestamps near 1727 transitions where tm_isdst does not change. 1728 1729 If HAVE_STRFTIME_L is defined to 1, the tz library now defines 1730 strftime_l for compatibility with recent versions of POSIX. 1731 Only the C locale is supported, though. HAVE_STRFTIME_L defaults 1732 to 1 on recent POSIX versions, and to 0 otherwise. 1733 1734 tzselect -c now uses a hybrid distance measure that works better 1735 in Africa. (Thanks to Alan Barrett for noting the problem.) 1736 1737 The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used, 1738 or when time_tz is defined. 1739 1740 When HAVE_UTMPX_H is set the 'date' command now builds on systems 1741 whose <utmpx.h> file does not define WTMPX_FILE, and when setting 1742 the date it updates the wtmpx file if _PATH_WTMPX is defined. 1743 This affects GNU/Linux and similar systems. 1744 1745 For easier maintenance later, some C code has been simplified, 1746 some lint has been removed, and the code has been tweaked so that 1747 plain 'make' is more likely to work. 1748 1749 The C type 'bool' is now used for boolean values, instead of 'int'. 1750 1751 The long-obsolete LOCALE_HOME code has been removed. 1752 1753 The long-obsolete 'gtime' function has been removed. 1754 1755 Changes affecting build procedure 1756 1757 'zdump' no longer links in ialloc.o, as it's not needed. 1758 1759 'make check_time_t_alternatives' no longer assumes GNU diff. 1760 1761 Changes affecting distribution tarballs 1762 1763 The files checktab.awk and zoneinfo2tdf.pl are now distributed in 1764 the tzdata tarball instead of the tzcode tarball, since they help 1765 maintain the data. The NEWS and Theory files are now also 1766 distributed in the tzdata tarball, as they're relevant for data. 1767 (Thanks to Alan Barrett for pointing this out.) Also, the 1768 leapseconds.awk file is no longer distributed in the tzcode 1769 tarball, since it belongs in the tzdata tarball (where 2014f 1770 inadvertently also distributed it). 1771 1772 Changes affecting documentation and commentary 1773 1774 A new file CONTRIBUTING is distributed. (Thanks to Tim Parenti for 1775 suggesting a CONTRIBUTING file, and to Tony Finch and Walter Harms 1776 for debugging it.) 1777 1778 The man pages have been updated to use function prototypes, 1779 to document thread-safe variants like localtime_r, and to document 1780 the NetBSD-inspired functions tzalloc, tzfree, localtime_rz, and 1781 mktime_z. 1782 1783 The fields in Link lines have been renamed to be more descriptive 1784 and more like the parameters of 'ln'. LINK-FROM has become TARGET, 1785 and LINK-TO has become LINK-NAME. 1786 1787 tz-link.htm mentions the IETF's tzdist working group; Windows 1788 Runtime etc. (thanks to Matt Johnson); and HP-UX's tztab. 1789 1790 Some broken URLs have been fixed in the commentary. (Thanks to 1791 Lester Caine.) 1792 1793 Commentary about Philippines DST has been updated, and commentary 1794 on pre-1970 time in India has been added. 1795 1796 1797 Release 2014f - 2014-08-05 17:42:36 -0700 1798 1799 Changes affecting future timestamps 1800 1801 Russia will subtract an hour from most of its time zones on 2014-10-26 1802 at 02:00 local time. (Thanks to Alexander Krivenyshev.) 1803 There are a few exceptions: Magadan Oblast (Asia/Magadan) and Zabaykalsky 1804 Krai are subtracting two hours; conversely, Chukotka Autonomous Okrug 1805 (Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka), Kemerovo Oblast 1806 (Asia/Novokuznetsk), and the Samara Oblast and the Udmurt Republic 1807 (Europe/Samara) are not changing their clocks. The changed zones are 1808 Europe/Kaliningrad, Europe/Moscow, Europe/Simferopol, Europe/Volgograd, 1809 Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk, 1810 Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Khandyga, 1811 Asia/Sakhalin, and Asia/Ust-Nera; Asia/Magadan will have two hours 1812 subtracted; and Asia/Novokuznetsk's time zone abbreviation is affected, 1813 but not its UTC offset. Two zones are added: Asia/Chita (split 1814 from Asia/Yakutsk, and also with two hours subtracted) and 1815 Asia/Srednekolymsk (split from Asia/Magadan, but with only one hour 1816 subtracted). (Thanks to Tim Parenti for much of the above.) 1817 1818 Changes affecting time zone abbreviations 1819 1820 Australian eastern time zone abbreviations are now AEST/AEDT not EST, 1821 and similarly for the other Australian zones. That is, for eastern 1822 standard and daylight saving time the abbreviations are AEST and AEDT 1823 instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT, 1824 and AWST/AWDT are now used instead of the former CST, CWST, and WST. 1825 This change does not affect UT offsets, only time zone abbreviations. 1826 (Thanks to Rich Tibbett and many others.) 1827 1828 Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07) 1829 effective 2014-10-26 at 02:00 local time. 1830 1831 The time zone abbreviation for Xinjiang Time (observed in rmqi) 1832 has been changed from URUT to XJT. (Thanks to Luther Ma.) 1833 1834 Prefer MSK/MSD for Moscow time in Russia, even in other cities. 1835 Similarly, prefer EET/EEST for eastern European time in Russia. 1836 1837 Change time zone abbreviations in (western) Samoa to use "ST" and 1838 "DT" suffixes, as this is more likely to match common practice. 1839 Prefix "W" to (western) Samoa time when its standard-time offset 1840 disagrees with that of American Samoa. 1841 1842 America/Metlakatla now uses PST, not MeST, to abbreviate its time zone. 1843 1844 Time zone abbreviations have been updated for Japan's two time 1845 zones used 1896-1937. JWST now stands for Western Standard 1846 Time, and JCST for Central Standard Time (formerly this was CJT). 1847 These abbreviations are now used for time in Korea, Taiwan, 1848 and Sakhalin while controlled by Japan. 1849 1850 Changes affecting past timestamps 1851 1852 China's five zones have been simplified to two, since the post-1970 1853 differences in the other three seem to have been imaginary. The 1854 zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been 1855 removed; backwards-compatibility links still work, albeit with 1856 different behaviors for timestamps before May 1980. Asia/Urumqi's 1857 1980 transition to UT +08 has been removed, so that it is now at 1858 +06 and not +08. (Thanks to Luther Ma and to Alois Treindl; 1859 Treindl sent helpful translations of two papers by Guo Qingsheng.) 1860 1861 Some zones have been turned into links, when they differed from existing 1862 zones only for older UT offsets where data entries were likely invented. 1863 These changes affect UT offsets in pre-1970 timestamps only. This is 1864 similar to the change in release 2013e, except this time for western 1865 Africa. The affected zones are: Africa/Bamako, Africa/Banjul, 1866 Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome, 1867 Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, and 1868 Atlantic/St_Helena. This also affects the backwards-compatibility 1869 link Africa/Timbuktu. (Thanks to Alan Barrett, Stephen Colebourne, 1870 Tim Parenti, and David Patte for reporting problems in earlier 1871 versions of this change.) 1872 1873 Asia/Shanghai's pre-standard-time UT offset has been changed from 1874 8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its 1875 transition to standard time has been changed from 1928 to 1901. 1876 1877 Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01, 1878 then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945. 1879 In 1946 it observed DST from 05-15 through 09-30; in 1947 1880 from 04-15 through 10-31; and in 1979 from 07-01 through 09-30. 1881 (Thanks to Yu-Cheng Chuang.) 1882 1883 Asia/Riyadh's transition to standard time is now 1947-03-14, not 1950. 1884 1885 Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not 1886 10-03 at 00:00. (Thanks to Konstantin Hyppnen.) 1887 1888 Pacific/Pago_Pago has been changed from UT -11:30 to -11 for the 1889 period from 1911 to 1950. 1890 1891 Pacific/Chatham has been changed to New Zealand standard time plus 1892 45 minutes for the period before 1957, reflecting a 1956 remark in 1893 the New Zealand parliament. 1894 1895 Europe/Budapest has several pre-1946 corrections: in 1918 the transition 1896 out of DST was on 09-16, not 09-29; in 1919 it was on 11-24, not 09-15; in 1897 1945 it was on 11-01, not 11-03; in 1941 the transition to DST was 04-08 1898 not 04-06 at 02:00; and there was no DST in 1920. 1899 1900 Africa/Accra is now assumed to have observed DST from 1920 through 1935. 1901 1902 Time in Russia before 1927 or so has been corrected by a few seconds in 1903 the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi, 1904 Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg, Europe/Helsinki, and 1905 Europe/Riga. Also, Moscow's location has been changed to its Kilometer 0 1906 point. (Thanks to Vladimir Karpinsky for the Moscow changes.) 1907 1908 Changes affecting data format 1909 1910 A new file 'zone1970.tab' supersedes 'zone.tab' in the installed data. 1911 The new file's extended format allows multiple country codes per zone. 1912 The older file is still installed but is deprecated; its format is 1913 not changing and it will still be distributed for a while, but new 1914 applications should use the new file. 1915 1916 The new file format simplifies maintenance of obscure locations. 1917 To test this, it adds coverage for the Crozet Islands and the 1918 Scattered Islands. (Thanks to Tobias Conradi and Antoine Leca.) 1919 1920 The file 'iso3166.tab' is planned to switch from ASCII to UTF-8. 1921 It is still ASCII now, but commentary about the switch has been added. 1922 The new file 'zone1970.tab' already uses UTF-8. 1923 1924 Changes affecting code 1925 1926 'localtime', 'mktime', etc. now use much less stack space if ALL_STATE 1927 is defined. (Thanks to Elliott Hughes for reporting the problem.) 1928 1929 'zic' no longer mishandles input when ignoring case in locales that 1930 are not compatible with English, e.g., unibyte Turkish locales when 1931 compiled with HAVE_GETTEXT. 1932 1933 Error diagnostics of 'zic' and 'yearistype' have been reworded so that 1934 they no longer use ASCII '-' as if it were a dash. 1935 1936 'zic' now rejects output file names that contain '.' or '..' components. 1937 (Thanks to Tim Parenti for reporting the problem.) 1938 1939 'zic -v' now warns about output file names that do not follow 1940 POSIX rules, or that contain a digit or '.'. (Thanks to Arthur 1941 David Olson for starting the ball rolling on this.) 1942 1943 Some lint has been removed when using GCC_DEBUG_FLAGS with GCC 4.9.0. 1944 1945 Changes affecting build procedure 1946 1947 'zic' no longer links in localtime.o and asctime.o, as they're not needed. 1948 (Thanks to John Cochran.) 1949 1950 Changes affecting documentation and commentary 1951 1952 The 'Theory' file documents legacy names, the longstanding 1953 exceptions to the POSIX-inspired file name rules. 1954 1955 The 'zic' documentation clarifies the role of time types when 1956 interpreting dates. (Thanks to Arthur David Olson.) 1957 1958 Documentation and commentary now prefer UTF-8 to US-ASCII, 1959 allowing the use of proper accents in foreign words and names. 1960 Code and data have not changed because of this. (Thanks to 1961 Garrett Wollman, Ian Abbott, and Guy Harris for helping to debug 1962 this.) 1963 1964 Non-HTML documentation and commentary now use plain-text URLs instead of 1965 HTML insertions, and are more consistent about bracketing URLs when they 1966 are not already surrounded by white space. (Thanks to suggestions by 1967 Steffen Nurpmeso.) 1968 1969 There is new commentary about Xujiahui Observatory, the five time-zone 1970 project in China from 1918 to 1949, timekeeping in Japanese-occupied 1971 Shanghai, and Tibet Time in the 1950s. The sharp-eyed can spot the 1972 warlord Jin Shuren in the data. 1973 1974 Commentary about the coverage of each Russian zone has been standardized. 1975 (Thanks to Tim Parenti). 1976 1977 There is new commentary about contemporary timekeeping in Ethiopia. 1978 1979 Obsolete comments about a 2007 proposal for DST in Kuwait has been removed. 1980 1981 There is new commentary about time in Poland in 1919. 1982 1983 Proper credit has been given to DST inventor George Vernon Hudson. 1984 1985 Commentary about time in Metlakatla, AK and Resolute, NU has been 1986 improved, with a new source for the former. 1987 1988 In zone.tab, Pacific/Easter no longer mentions Salas y Gmez, as it 1989 is uninhabited. 1990 1991 Commentary about permanent Antarctic bases has been updated. 1992 1993 Several typos have been corrected. (Thanks to Tim Parenti for 1994 contributing some of these fixes.) 1995 1996 tz-link.htm now mentions the JavaScript libraries Moment Timezone, 1997 TimezoneJS.Date, Walltime-js, and Timezone. (Thanks to a heads-up 1998 from Matt Johnson.) Also, it mentions the Go 'latlong' package. 1999 (Thanks to a heads-up from Dirkjan Ochtman.) 2000 2001 The files usno1988, usno1989, usno1989a, usno1995, usno1997, and usno1998 2002 have been removed. These obsolescent US Naval Observatory entries were no 2003 longer helpful for maintenance. (Thanks to Tim Parenti for the suggestion.) 2004 2005 2006 Release 2014e - 2014-06-12 21:53:52 -0700 2007 2008 Changes affecting near-future timestamps 2009 2010 Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00. 2011 (Thanks to Imed Chihi.) Guess that from 2015 on Egypt will temporarily 2012 switch to standard time at 24:00 the last Thursday before Ramadan, and 2013 back to DST at 00:00 the first Friday after Ramadan. 2014 2015 Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00. (Thanks 2016 to Milamber Space Network.) Guess that from 2015 on Morocco will 2017 temporarily switch to standard time at 03:00 the last Saturday before 2018 Ramadan, and back to DST at 02:00 the first Saturday after Ramadan. 2019 2020 Changes affecting past timestamps 2021 2022 The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of 2023 "MSD" for Moscow's double daylight time in summer 1921. Also, a typo 2024 "VLASST" has been repaired to be "VLAST" for Vladivostok summer time 2025 in 1991. (Thanks to Hank W. for reporting the problems.) 2026 2027 Changes affecting commentary 2028 2029 tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the 2030 draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and 2031 removes stale pointers to World Time Explorer and WORLDTIME. 2032 2033 2034 Release 2014d - 2014-05-27 21:34:40 -0700 2035 2036 Changes affecting code 2037 2038 zic no longer generates files containing timestamps before the Big Bang. 2039 This works around GNOME bug 730332 2040 <https://bugzilla.gnome.org/show_bug.cgi?id=730332>. 2041 (Thanks to Leonardo Chiquitto for reporting the bug, and to 2042 Arthur David Olson and James Cloos for suggesting improvements to the fix.) 2043 2044 Changes affecting documentation 2045 2046 tz-link.htm now mentions GNOME. 2047 2048 2049 Release 2014c - 2014-05-13 07:44:13 -0700 2050 2051 Changes affecting near-future timestamps 2052 2053 Egypt observes DST starting 2014-05-15 at 24:00. 2054 (Thanks to Ahmad El-Dardiry and Gunther Vermier.) 2055 Details have not been announced, except that DST will not be observed 2056 during Ramadan. Guess that DST will stop during the same Ramadan dates as 2057 Morocco, and that Egypt's future spring and fall transitions will be the 2058 same as 2010 when it last observed DST, namely April's last Friday at 2059 00:00 to September's last Thursday at 23:00 standard time. Also, guess 2060 that Ramadan transitions will be at 00:00 standard time. 2061 2062 Changes affecting code 2063 2064 zic now generates transitions for minimum time values, eliminating guesswork 2065 when handling low-valued timestamps. (Thanks to Arthur David Olson.) 2066 2067 Port to Cygwin sans glibc. (Thanks to Arthur David Olson.) 2068 2069 Changes affecting commentary and documentation 2070 2071 Remove now-confusing comment about Jordan. (Thanks to Oleksii Nochovnyi.) 2072 2073 2074 Release 2014b - 2014-03-24 21:28:50 -0700 2075 2076 Changes affecting near-future timestamps 2077 2078 Crimea switches to Moscow time on 2014-03-30 at 02:00 local time. 2079 (Thanks to Alexander Krivenyshev.) Move its zone.tab entry from UA to RU. 2080 2081 New entry for Troll station, Antarctica. (Thanks to Paul-Inge Flakstad and 2082 Bengt-Inge Larsson.) This is currently an approximation; a better version 2083 will require the zic and localtime fixes mentioned below, and the plan is 2084 to wait for a while until at least the zic fixes propagate. 2085 2086 Changes affecting code 2087 2088 'zic' and 'localtime' no longer reject locations needing four transitions 2089 per year for the foreseeable future. (Thanks to Andrew Main (Zefram).) 2090 Also, 'zic' avoids some unlikely failures due to integer overflow. 2091 2092 Changes affecting build procedure 2093 2094 'make check' now detects Rule lines defined but never used. 2095 The NZAQ rules, an instance of this problem, have been removed. 2096 2097 Changes affecting commentary and documentation 2098 2099 Fix Tuesday/Thursday typo in description of time in Israel. 2100 (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.) 2101 2102 Microsoft Windows 8.1 doesn't support tz database names. (Thanks 2103 to Donald MacQueen.) Instead, the Microsoft Windows Store app 2104 library supports them. 2105 2106 Add comments about Johnston Island time in the 1960s. 2107 (Thanks to Lyle McElhaney.) 2108 2109 Morocco's 2014 DST start will be as predicted. 2110 (Thanks to Sebastien Willemijns.) 2111 2112 2113 Release 2014a - 2014-03-07 23:30:29 -0800 2114 2115 Changes affecting near-future timestamps 2116 2117 Turkey begins DST on 2014-03-31, not 03-30. (Thanks to Faruk Pasin for 2118 the heads-up, and to Tim Parenti for simplifying the update.) 2119 2120 Changes affecting past timestamps 2121 2122 Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00. 2123 (Thanks to Steffen Thorsen.) 2124 2125 Ukraine switched from Moscow to Eastern European time on 1990-07-01 2126 (not 1992-01-01), and observed DST during the entire next winter. 2127 (Thanks to Vladimir in Moscow via Alois Treindl.) 2128 2129 In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03. 2130 (Thanks to Avigdor Finkelstein.) 2131 2132 Changes affecting code 2133 2134 A uninitialized-storage bug in 'localtime' has been fixed. 2135 (Thanks to Logan Chien.) 2136 2137 Changes affecting the build procedure 2138 2139 The settings for 'make check_web' now default to Ubuntu 13.10. 2140 2141 Changes affecting commentary and documentation 2142 2143 The boundary of the US Pacific time zone is given more accurately. 2144 (Thanks to Alan Mintz.) 2145 2146 Chile's 2014 DST will be as predicted. (Thanks to Jos Miguel Garrido.) 2147 2148 Paraguay's 2014 DST will be as predicted. (Thanks to Carlos Ral Perasso.) 2149 2150 Better descriptions of countries with same time zone history as 2151 Trinidad and Tobago since 1970. (Thanks to Alan Barrett for suggestion.) 2152 2153 Several changes affect tz-link.htm, the main web page. 2154 2155 Mention Time.is (thanks to Even Scharning) and WX-now (thanks to 2156 David Braverman). 2157 2158 Mention xCal (Internet RFC 6321) and jCal. 2159 2160 Microsoft has some support for tz database names. 2161 2162 CLDR data formats include both XML and JSON. 2163 2164 Mention Maggiolo's map of solar vs standard time. 2165 (Thanks to Arthur David Olson.) 2166 2167 Mention TZ4Net. (Thanks to Matt Johnson.) 2168 2169 Mention the timezone-olson Haskell package. 2170 2171 Mention zeitverschiebung.net. (Thanks to Martin Jger.) 2172 2173 Remove moribund links to daylight-savings-time.info and to 2174 Simple Timer + Clocks. 2175 2176 Update two links. (Thanks to Oscar van Vlijmen.) 2177 2178 Fix some formatting glitches, e.g., remove random newlines from 2179 abbr elements' title attributes. 2180 2181 2182 Release 2013i - 2013-12-17 07:25:23 -0800 2183 2184 Changes affecting near-future timestamps: 2185 2186 Jordan switches back to standard time at 00:00 on December 20, 2013. 2187 The 2006-2011 transition schedule is planned to resume in 2014. 2188 (Thanks to Steffen Thorsen.) 2189 2190 Changes affecting past timestamps: 2191 2192 In 2004, Cuba began DST on March 28, not April 4. 2193 (Thanks to Steffen Thorsen.) 2194 2195 Changes affecting code 2196 2197 The compile-time flag NOSOLAR has been removed, as nowadays the 2198 benefit of slightly shrinking runtime table size is outweighed by the 2199 cost of disallowing potential future updates that exceed old limits. 2200 2201 Changes affecting documentation and commentary 2202 2203 The files solar87, solar88, and solar89 are no longer distributed. 2204 They were a negative experiment - that is, a demonstration that 2205 tz data can represent solar time only with some difficulty and error. 2206 Their presence in the distribution caused confusion, as Riyadh 2207 civil time was generally not solar time in those years. 2208 2209 tz-link.htm now mentions Noda Time. (Thanks to Matt Johnson.) 2210 2211 2212 Release 2013h - 2013-10-25 15:32:32 -0700 2213 2214 Changes affecting current and future timestamps: 2215 2216 Libya has switched its UT offset back to +02 without DST, instead 2217 of +01 with DST. (Thanks to Even Scharning.) 2218 2219 Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules. 2220 (Thanks to Gwillim Law.) 2221 2222 Changes affecting future timestamps: 2223 2224 Acre and (we guess) western Amazonas will switch from UT -04 to -05 2225 on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe. 2226 (Thanks to Steffen Thorsen.) 2227 2228 Add entries for DST transitions in Morocco in the year 2038. 2229 This avoids some year-2038 glitches introduced in 2013g. 2230 (Thanks to Yoshito Umaoka for reporting the problem.) 2231 2232 Changes affecting API 2233 2234 The 'tzselect' command no longer requires the 'select' command, 2235 and should now work with /bin/sh on more platforms. It also works 2236 around a bug in BusyBox awk before version 1.21.0. (Thanks to 2237 Patrick 'P. J.' McDermott and Alan Barrett.) 2238 2239 Changes affecting code 2240 2241 Fix localtime overflow bugs with 32-bit unsigned time_t. 2242 2243 zdump no longer assumes sscanf returns maximal values on overflow. 2244 2245 Changes affecting the build procedure 2246 2247 The builder can specify which programs to use, if any, instead of 2248 'ar' and 'ranlib', and libtz.a is now built locally before being 2249 installed. (Thanks to Michael Forney.) 2250 2251 A dependency typo in the 'zdump' rule has been fixed. 2252 (Thanks to Andrew Paprocki.) 2253 2254 The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f' 2255 work as specified by POSIX.2-1992 or later; this is portable nowadays. 2256 2257 'make clean' no longer removes 'leapseconds', since it's 2258 host-independent and is part of the distribution. 2259 2260 The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed. 2261 2262 Changes affecting documentation and commentary 2263 2264 tz-link.htm now mentions TC TIMEZONE's draft time zone service protocol 2265 (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle). 2266 2267 Update URLs in tz-link page. Add URLs for Microsoft Windows, since 2268 8.1 introduces tz support. Remove URLs for Tru64 and UnixWare (no 2269 longer maintained) and for old advisories. SOFA now does C. 2270 2271 Release 2013g - 2013-09-30 21:08:26 -0700 2272 2273 Changes affecting current and near-future timestamps 2274 2275 Morocco now observes DST from the last Sunday in March to the last 2276 Sunday in October, not April to September respectively. (Thanks 2277 to Steffen Thorsen.) 2278 2279 Changes affecting 'zic' 2280 2281 'zic' now runs on platforms that lack both hard links and symlinks. 2282 (Thanks to Theo Veenker for reporting the problem, for MinGW.) 2283 Also, fix some bugs on platforms that lack hard links but have symlinks. 2284 2285 'zic -v' again warns that Asia/Tehran has no POSIX environment variable 2286 to predict the far future, fixing a bug introduced in 2013e. 2287 2288 Changes affecting the build procedure 2289 2290 The 'leapseconds' file is again put into the tzdata tarball. 2291 Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to 2292 Matt Burgess and Ian Abbott.) The timestamps of these and other 2293 dependent files in tarballs are adjusted more consistently. 2294 2295 Changes affecting documentation and commentary 2296 2297 The README file is now part of the data tarball as well as the code. 2298 It now states that files are public domain unless otherwise specified. 2299 (Thanks to Andrew Main (Zefram) for asking for clarifications.) 2300 Its details about the 1989 release moved to a place of honor near 2301 the end of NEWS. 2302 2303 2304 Release 2013f - 2013-09-24 23:37:36 -0700 2305 2306 Changes affecting near-future timestamps 2307 2308 Tocantins will very likely not observe DST starting this spring. 2309 (Thanks to Steffen Thorsen.) 2310 2311 Jordan will likely stay at UT +03 indefinitely, and will not fall 2312 back this fall. 2313 2314 Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.) 2315 2316 Changes affecting API 2317 2318 The types of the global variables 'timezone' and 'altzone' (if present) 2319 have been changed back to 'long'. This is required for 'timezone' 2320 by POSIX, and for 'altzone' by common practice, e.g., Solaris 11. 2321 These variables were originally 'long' in the tz code, but were 2322 mistakenly changed to 'time_t' in 1987; nobody reported the 2323 incompatibility until now. The difference matters on x32, where 2324 'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.) 2325 2326 Changes affecting the build procedure 2327 2328 Avoid long strings in leapseconds.awk to work around a mawk bug. 2329 (Thanks to Cyril Baurand.) 2330 2331 Changes affecting documentation and commentary 2332 2333 New file 'NEWS' that contains release notes like this one. 2334 2335 Paraguay's law does not specify DST transition time; 00:00 is customary. 2336 (Thanks to Waldemar Villamayor-Venialbo.) 2337 2338 Minor capitalization fixes. 2339 2340 Changes affecting version-control only 2341 2342 The experimental GitHub repository now contains annotated and 2343 signed tags for recent releases, e.g., '2013e' for Release 2013e. 2344 Releases are tagged starting with 2012e; earlier releases were 2345 done differently, and tags would either not have a simple name or 2346 not exactly match what was released. 2347 2348 'make set-timestamps' is now simpler and a bit more portable. 2349 2350 2351 Release 2013e - 2013-09-19 23:50:04 -0700 2352 2353 Changes affecting near-future timestamps 2354 2355 This year Fiji will start DST on October 27, not October 20. 2356 (Thanks to David Wheeler for the heads-up.) For now, guess that 2357 Fiji will continue to spring forward the Sunday before the fourth 2358 Monday in October. 2359 2360 Changes affecting current and future time zone abbreviations 2361 2362 Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian 2363 time zone abbreviations since 1932. (Thanks to George Ziegler, 2364 Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and 2365 Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura, 2366 Asia/Makassar, and Asia/Pontianak. 2367 2368 Use ART (UT -03, standard time), rather than WARST (also -03, but 2369 daylight saving time) for San Luis, Argentina since 2009. 2370 2371 Changes affecting Godthb timestamps after 2037 if version mismatch 2372 2373 Allow POSIX-like TZ strings where the transition time's hour can 2374 range from -167 through 167, instead of the POSIX-required 0 2375 through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the 2376 new Fiji rules. This is a more-compact way to represent 2377 far-future timestamps for America/Godthab, America/Santiago, 2378 Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem, 2379 Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by 2380 this change. (Derived from a suggestion by Arthur David Olson.) 2381 2382 Allow POSIX-like TZ strings where daylight saving time is in 2383 effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western 2384 Argentina Summer Time all year. This supports a more-compact way 2385 to represent the 2013d data for America/Argentina/San_Luis. 2386 Because of the change for San Luis noted above this change does not 2387 affect the current data. (Thanks to Andrew Main (Zefram) for 2388 suggestions that improved this change.) 2389 2390 Where these two TZ changes take effect, there is a minor extension 2391 to the tz file format in that it allows new values for the 2392 embedded TZ-format string, and the tz file format version number 2393 has therefore been increased from 2 to 3 as a precaution. 2394 Version-2-based client code should continue to work as before for 2395 all timestamps before 2038. Existing version-2-based client code 2396 (tzcode, GNU/Linux, Solaris) has been tested on version-3-format 2397 files, and typically works in practice even for timestamps after 2398 2037; the only known exception is America/Godthab. 2399 2400 Changes affecting timestamps before 1970 2401 2402 Pacific/Johnston is now a link to Pacific/Honolulu. This corrects 2403 some errors before 1947. 2404 2405 Some zones have been turned into links, when they differ from existing 2406 zones only in older data entries that were likely invented or that 2407 differ only in LMT or transitions from LMT. These changes affect 2408 only timestamps before 1943. The affected zones are: 2409 Africa/Juba, America/Anguilla, America/Aruba, America/Dominica, 2410 America/Grenada, America/Guadeloupe, America/Marigot, 2411 America/Montserrat, America/St_Barthelemy, America/St_Kitts, 2412 America/St_Lucia, America/St_Thomas, America/St_Vincent, 2413 America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for 2414 confirming that the old Europe/Vaduz zone was wrong and the new 2415 link is better for WWII-era times.) 2416 2417 Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects 2418 America/Cayman, America/Jamaica and America/Grand_Turk timestamps 2419 from 1890 to 1912. 2420 2421 Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46. 2422 This affects Europe/Zurich timestamps from 1853 to 1894. (Thanks 2423 to Alois Treindl). 2424 2425 Change the date of the circa-1850 Zurich transition from 1849-09-12 2426 to 1853-07-16, overriding Shanks with data from Messerli about 2427 postal and telegraph time in Switzerland. 2428 2429 Changes affecting time zone abbreviations before 1970 2430 2431 For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932, 2432 as Jakarta was called Batavia back then. 2433 2434 Changes affecting API 2435 2436 The 'zic' command now outputs a dummy transition when far-future 2437 data can't be summarized using a TZ string, and uses a 402-year 2438 window rather than a 400-year window. For the current data, this 2439 affects only the Asia/Tehran file. It does not affect any of the 2440 timestamps that this file represents, so zdump outputs the same 2441 information as before. (Thanks to Andrew Main (Zefram).) 2442 2443 The 'date' command has a new '-r' option, which lets you specify 2444 the integer time to display, a la FreeBSD. 2445 2446 The 'tzselect' command has two new options '-c' and '-n', which lets you 2447 select a zone based on latitude and longitude. 2448 2449 The 'zic' command's '-v' option now warns about constructs that 2450 require the new version-3 binary file format. (Thanks to Arthur 2451 David Olson for the suggestion.) 2452 2453 Support for floating-point time_t has been removed. 2454 It was always dicey, and POSIX no longer requires it. 2455 (Thanks to Eric Blake for suggesting to the POSIX committee to 2456 remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy 2457 Heninger, Arthur David Olson, and Alois Treindl, for reporting 2458 bugs and elucidating some of the corners of the old floating-point 2459 implementation.) 2460 2461 The signatures of 'offtime', 'timeoff', and 'gtime' have been 2462 changed back to the old practice of using 'long' to represent UT 2463 offsets. This had been inadvertently and mistakenly changed to 2464 'int_fast32_t'. (Thanks to Christos Zoulas.) 2465 2466 The code avoids undefined behavior on integer overflow in some 2467 more places, including gmtime, localtime, mktime and zdump. 2468 2469 Changes affecting the zdump utility 2470 2471 zdump now outputs "UT" when referring to Universal Time, not "UTC". 2472 "UTC" does not make sense for timestamps that predate the introduction 2473 of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen 2474 for clarifying UT vs UTC.) 2475 2476 Data changes affecting behavior of tzselect and similar programs 2477 2478 Country code BQ is now called the more-common name "Caribbean Netherlands" 2479 rather than the more-official "Bonaire, St Eustatius & Saba". 2480 2481 Remove from zone.tab the names America/Montreal, America/Shiprock, 2482 and Antarctica/South_Pole, as they are equivalent to existing 2483 same-country-code zones for post-1970 timestamps. The data entries for 2484 these names are unchanged, so the names continue to work as before. 2485 2486 Changes affecting code internals 2487 2488 zic -c now runs way faster on 64-bit hosts when given large numbers. 2489 2490 zic now uses vfprintf to avoid allocating and freeing some memory. 2491 2492 tzselect now computes the list of continents from the data, 2493 rather than have it hard-coded. 2494 2495 Minor changes pacify GCC 4.7.3 and GCC 4.8.1. 2496 2497 Changes affecting the build procedure 2498 2499 The 'leapseconds' file is now generated automatically from a 2500 new file 'leap-seconds.list', which is a copy of 2501 <ftp://ftp.nist.gov/pub/time/leap-seconds.list> 2502 A new source file 'leapseconds.awk' implements this. 2503 The goal is simplification of the future maintenance of 'leapseconds'. 2504 2505 When building the 'posix' or 'right' subdirectories, if the 2506 subdirectory would be a copy of the default subdirectory, it is 2507 now made a symbolic link if that is supported. This saves about 2508 2 MB of file system space. 2509 2510 The links America/Shiprock and Antarctica/South_Pole have been 2511 moved to the 'backward' file. This affects only nondefault builds 2512 that omit 'backward'. 2513 2514 Changes affecting version-control only 2515 2516 .gitignore now ignores 'date'. 2517 2518 Changes affecting documentation and commentary 2519 2520 Changes to the 'tzfile' man page 2521 2522 It now mentions that the binary file format may be extended in 2523 future versions by appending data. 2524 2525 It now refers to the 'zdump' and 'zic' man pages. 2526 2527 Changes to the 'zic' man page 2528 2529 It lists conditions that elicit a warning with '-v'. 2530 2531 It says that the behavior is unspecified when duplicate names 2532 are given, or if the source of one link is the target of another. 2533 2534 Its examples are updated to match the latest data. 2535 2536 The definition of white space has been clarified slightly. 2537 (Thanks to Michael Deckers.) 2538 2539 Changes to the 'Theory' file 2540 2541 There is a new section about the accuracy of the tz database, 2542 describing the many ways that errors can creep in, and 2543 explaining why so many of the pre-1970 timestamps are wrong or 2544 misleading (thanks to Steve Allen, Lester Caine, and Garrett 2545 Wollman for discussions that contributed to this). 2546 2547 The 'Theory' file describes LMT better (this follows a 2548 suggestion by Guy Harris). 2549 2550 It refers to the 2013 edition of POSIX rather than the 2004 edition. 2551 2552 It's mentioned that excluding 'backward' should not affect the 2553 other data, and it suggests at least one zone.tab name per 2554 inhabited country (thanks to Stephen Colebourne). 2555 2556 Some longstanding restrictions on names are documented, e.g., 2557 'America/New_York' precludes 'America/New_York/Bronx'. 2558 2559 It gives more reasons for the 1970 cutoff. 2560 2561 It now mentions which time_t variants are supported, such as 2562 signed integer time_t. (Thanks to Paul Goyette for reporting 2563 typos in an experimental version of this change.) 2564 2565 (Thanks to Philip Newton for correcting typos in these changes.) 2566 2567 Documentation and commentary is more careful to distinguish UT in 2568 general from UTC in particular. (Thanks to Steve Allen.) 2569 2570 Add a better source for the Zurich 1894 transition. 2571 (Thanks to Pierre-Yves Berger.) 2572 2573 Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.) 2574 2575 2576 Release 2013d - 2013-07-05 07:38:01 -0700 2577 2578 Changes affecting future timestamps: 2579 2580 Morocco's midsummer transitions this year are July 7 and August 10, 2581 not July 9 and August 8. (Thanks to Andrew Paprocki.) 2582 2583 Israel now falls back on the last Sunday of October. 2584 (Thanks to Ephraim Silverberg.) 2585 2586 Changes affecting past timestamps: 2587 2588 Specify Jerusalem's location more precisely; this changes the pre-1880 2589 times by 2 s. 2590 2591 Changing affecting metadata only: 2592 2593 Fix typos in the entries for country codes BQ and SX. 2594 2595 Changes affecting code: 2596 2597 Rework the code to fix a bug with handling Australia/Macquarie on 2598 32-bit hosts (thanks to Arthur David Olson). 2599 2600 Port to platforms like NetBSD, where time_t can be wider than long. 2601 2602 Add support for testing time_t types other than the system's. 2603 Run 'make check_time_t_alternatives' to try this out. 2604 Currently, the tests fail for unsigned time_t; 2605 this should get fixed at some point. 2606 2607 Changes affecting documentation and commentary: 2608 2609 Deemphasize the significance of national borders. 2610 2611 Update the zdump man page. 2612 2613 Remove obsolete NOID comment (thanks to Denis Excoffier). 2614 2615 Update several URLs and comments in the web pages. 2616 2617 Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler). 2618 2619 Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka). 2620 2621 2622 Release 2013c - 2013-04-19 16:17:40 -0700 2623 2624 Changes affecting current and future timestamps: 2625 2626 Palestine observed DST starting March 29, 2013. (Thanks to 2627 Steffen Thorsen.) From 2013 on, Gaza and Hebron both observe DST, 2628 with the predicted rules being the last Thursday in March at 24:00 2629 to the first Friday on or after September 21 at 01:00. 2630 2631 Assume that the recent change to Paraguay's DST rules is permanent, 2632 by moving the end of DST to the 4th Sunday in March every year. 2633 (Thanks to Carlos Ral Perasso.) 2634 2635 Changes affecting past timestamps: 2636 2637 Fix some historical data for Palestine to agree with that of 2638 timeanddate.com, as follows: 2639 2640 The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not 2641 00:00 Apr 1. 2642 2643 The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not 2644 02:00. 2645 2646 The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27. 2647 2648 The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2. 2649 2650 The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01. 2651 2652 The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00. 2653 2654 Fix times of habitation for Macquarie to agree with the Tasmania 2655 Parks & Wildlife Service history, which indicates that permanent 2656 habitation was 1899-1919 and 1948 on. 2657 2658 Changing affecting metadata only: 2659 2660 Macquarie Island is politically part of Australia, not Antarctica. 2661 (Thanks to Tobias Conradi.) 2662 2663 Sort Macquarie more-consistently with other parts of Australia. 2664 (Thanks to Tim Parenti.) 2665 2666 2667 Release 2013b - 2013-03-10 22:33:40 -0700 2668 2669 Changes affecting current and future timestamps: 2670 2671 Haiti uses US daylight-saving rules this year, and presumably future years. 2672 This changes timestamps starting today. (Thanks to Steffen Thorsen.) 2673 2674 Paraguay will end DST on March 24 this year. 2675 (Thanks to Steffen Thorsen.) For now, assume it's just this year. 2676 2677 Morocco does not observe DST during Ramadan; 2678 try to predict Ramadan in Morocco as best we can. 2679 (Thanks to Erik Homoet for the heads-up.) 2680 2681 Changes affecting commentary: 2682 2683 Update URLs in tz-link page. Add URLs for webOS, BB10, iOS. 2684 Update URL for Solaris. Mention Internet RFC 6557. 2685 Update Internet RFCs 2445->5545, 2822->5322. 2686 Switch from FTP to HTTP for Internet RFCs. 2687 2688 2689 Release 2013a - 2013-02-27 09:20:35 -0800 2690 2691 Change affecting binary data format: 2692 2693 The zone offset at the end of version-2-format zone files is now 2694 allowed to be 24:00, as per POSIX.1-2008. (Thanks to Arthur David Olson.) 2695 2696 Changes affecting current and future timestamps: 2697 2698 Chile's 2013 rules, and we guess rules for 2014 and later, will be 2699 the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC. 2700 (Thanks to Steffen Thorsen and Robert Elz.) 2701 2702 New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen. 2703 (Thanks to Tobias Conradi and Arthur David Olson.) 2704 2705 Many changes affect historical timestamps before 1940. 2706 These were deduced from: Milne J. Civil time. Geogr J. 1899 2707 Feb;13(2):173-94 <https://www.jstor.org/stable/1774359>. 2708 2709 Changes affecting the code: 2710 2711 Fix zic bug that mishandled Egypt's 2010 changes (this also affected 2712 the data). (Thanks to Arthur David Olson.) 2713 2714 Fix localtime bug when time_t is unsigned and data files were generated 2715 by a signed time_t system. (Thanks to Doug Bailey for reporting and 2716 to Arthur David Olson for fixing.) 2717 2718 Allow the email address for bug reports to be set by the packager. 2719 The default is tz (a] iana.org, as before. (Thanks to Joseph S. Myers.) 2720 2721 Update HTML checking to be compatible with Ubuntu 12.10. 2722 2723 Check that files are a safe subset of ASCII. At some point we may 2724 relax this requirement to a safe subset of UTF-8. Without the 2725 check, some non-UTF-8 encodings were leaking into the distribution. 2726 2727 Commentary changes: 2728 2729 Restore a comment about copyright notices that was inadvertently deleted. 2730 (Thanks to Arthur David Olson.) 2731 2732 Improve the commentary about which districts observe what times 2733 in Russia. (Thanks to Oscar van Vlijmen and Arthur David Olson). 2734 2735 Add web page links to tz.js. 2736 2737 Add "Run by the Monkeys" to tz-art. (Thanks to Arthur David Olson.) 2738 2739 2740 Release 2012j - 2012-11-12 18:34:49 -0800 2741 2742 Libya moved to CET this weekend, but with DST planned next year. 2743 (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.) 2744 2745 Signatures now have the extension .asc, not .sign, as that's more 2746 standard. (Thanks to Phil Pennock.) 2747 2748 The output of 'zdump --version', and of 'zic --version', now 2749 uses a format that is more typical for --version. 2750 (Thanks to Joseph S. Myers.) 2751 2752 The output of 'tzselect --help', 'zdump --help', and 'zic --help' 2753 now uses tz (a] iana.org rather than the old elsie address. 2754 2755 zic -v now complains about abbreviations that are less than 3 2756 or more than 6 characters, as per Posix. Formerly, it checked 2757 for abbreviations that were more than 3. 2758 2759 'make public' no longer puts its temporary directory under /tmp, 2760 and uses the just-built zic rather than the system zic. 2761 2762 Various fixes to documentation and commentary. 2763 2764 2765 Release 2012i - 2012-11-03 12:57:09 -0700 2766 2767 Cuba switches from DST tomorrow at 01:00. (Thanks to Steffen Thorsen.) 2768 2769 Linker flags can now be specified via LDFLAGS. 2770 AWK now defaults to 'awk', not 'nawk'. 2771 The shell in tzselect now defaults to /bin/bash, but this can 2772 be overridden by specifying KSHELL. 2773 The main web page now mentions the unofficial GitHub repository. 2774 (Thanks to Mike Frysinger.) 2775 2776 Tarball signatures can now be built by running 'make signatures'. 2777 There are also new makefile rules 'tarballs', 'check_public', and 2778 separate makefile rules for each tarball and signature file. 2779 A few makefile rules are now more portable to strict POSIX. 2780 2781 The main web page now lists the canonical IANA URL. 2782 2783 2784 Release 2012h - 2012-10-26 22:49:10 -0700 2785 2786 Bahia no longer has DST. (Thanks to Kelley Cook.) 2787 2788 Tocantins has DST. (Thanks to Rodrigo Severo.) 2789 2790 Israel has new DST rules next year. (Thanks to Ephraim Silverberg.) 2791 2792 Jordan stays on DST this winter. (Thanks to Steffen Thorsen.) 2793 2794 Web page updates. 2795 2796 More C modernization, except that at Arthur David Olson's suggestion 2797 the instances of 'register' were kept. 2798 2799 2800 Release 2012g - 2012-10-17 20:59:45 -0700 2801 2802 Samoa fall 2012 and later. (Thanks to Nicholas Pereira and Robert Elz.) 2803 2804 Palestine fall 2012. (Thanks to Steffen Thorsen.) 2805 2806 Assume C89. 2807 2808 To attack the version-number problem, this release ships the file 2809 'Makefile' (which contains the release number) in both the tzcode and 2810 the tzdata tarballs. The two Makefiles are identical, and should be 2811 identical in any matching pair of tarballs, so it shouldn't matter 2812 which order you extract the tarballs. Perhaps we can come up with a 2813 better version-number scheme at some point; this scheme does have the 2814 virtue of not adding more files. 2815 2816 2817 Release 2012f - 2012-09-12 23:17:03 -0700 2818 2819 * australasia (Pacific/Fiji): Fiji DST is October 21 through January 2820 20 this year. (Thanks to Steffen Thorsen.) 2821 2822 2823 Release 2012e - 2012-08-02 20:44:55 -0700 2824 2825 * australasia (Pacific/Fakaofo): Tokelau is UT +13, not +14. 2826 (Thanks to Steffen Thorsen.) 2827 2828 * Use a single version number for both code and data. 2829 2830 * .gitignore: New file. 2831 2832 * Remove trailing white space. 2833 2834 2835 Release code2012c-data2012d - 2012-07-19 16:35:33 -0700 2836 2837 Changes for Morocco's timestamps, which take effect in a couple of 2838 hours, along with infrastructure changes to accommodate how the tz 2839 code and data are released on IANA. 2840 2841 2842 Release data2012c - 2012-03-27 12:17:25 -0400 2843 2844 africa 2845 Summer time changes for Morocco (to start late April 2012) 2846 2847 asia 2848 Changes for 2012 for Gaza & the West Bank (Hebron) and Syria 2849 2850 northamerica 2851 Haiti following US/Canada rules for 2012 (and we're assuming, 2852 for now anyway, for the future). 2853 2854 2855 Release 2012b - 2012-03-02 12:29:15 +0700 2856 2857 There is just one change to tzcode2012b (compared with 2012a): 2858 the Makefile that was accidentally included with 2012a has been 2859 replaced with the version that should have been there, which is 2860 identical with the previous version (from tzcode2011i). 2861 2862 There are just two changes in tzdata2012b compared with 2012a. 2863 2864 Most significantly, summer time in Cuba has been delayed 3 weeks 2865 (now starts April 1 rather than March 11). Since Mar 11 (the old start 2866 date, as listed in 2012a) is just a little over a week away, this 2867 change is urgent. 2868 2869 Less importantly, an excess tab in one of the changes in zone.tab 2870 in 2012a has been removed. 2871 2872 2873 Release 2012a - 2012-03-01 18:28:10 +0700 2874 2875 The changes in tzcode2012a (compared to the previous version, 2011i) 2876 are entirely to the README and tz-art.htm and tz-link.htm files, if 2877 none of those concern you, you can ignore the code update. The changes 2878 reflect the changed addresses for the mailing list and the code and 2879 data distribution points & methods (and a link to DateTime::TimeZone::Tzfile 2880 has been added to tz-link.htm). 2881 2882 In tzdata2012a (compared to the previous release, which was 2011n) 2883 the major changes are: 2884 Chile 2011/2012 and 2012/2013 summer time date adjustments. 2885 Falkland Islands onto permanent summer time (we're assuming for the 2886 foreseeable future, though 2012 is all we're fairly certain of.) 2887 Armenia has abolished Summer Time. 2888 Tokelau jumped the International Date Line back last December 2889 (just the same as their near neighbour, Samoa). 2890 America/Creston is a new zone for a small area of British Columbia 2891 There will be a leapsecond 2012-06-30 23:59:60 UTC. 2892 2893 Other minor changes are: 2894 Corrections to 1918 Canadian summer time end dates. 2895 Updated URL for UK time zone history (in comments) 2896 A few typos in Le Corre's list of free French place names (comments) 2897 2898 2899 Release data2011n - 2011-10-30 14:57:54 +0700 2900 2901 There are three changes of note - most urgently, Cuba (America/Havana) 2902 has extended summer time by two weeks, now to end on Nov 13, rather than 2903 the (already past) Oct 30. Second, the Pridnestrovian Moldavian Republic 2904 (Europe/Tiraspol) decided not to split from the rest of Moldova after 2905 all, and consequently that zone has been removed (again) and reinstated 2906 in the "backward" file as a link to Europe/Chisinau. And third, the 2907 end date for Fiji's summer time this summer was moved forward from the 2908 earlier planned Feb 26, to Jan 22. 2909 2910 Apart from that, Moldova (MD) returns to a single entry in zone.tab 2911 (and the incorrect syntax that was in the 2011m version of that file 2912 is so fixed - it would have been fixed in a different way had this 2913 change not happened - that's the "missing" sccs version id). 2914 2915 2916 Release data2011m - 2011-10-24 21:42:16 +0700 2917 2918 In particular, the typos in comments in the data (2011-11-17 should have 2919 been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that 2920 Tim Parenti noted) have been fixed, and the change for Ukraine has been 2921 made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to 2922 Tim Parenti, and also Denys Gavrysh) 2923 2924 In addition, I added Europe/Tiraspol to zone.tab. 2925 2926 This time, all the files have new version numbers... (including the files 2927 otherwise unchanged in 2011m that were changed in 2011l but didn't get new 2928 version numbers there...) 2929 2930 2931 Release data2011l - 2011-10-10 11:15:43 +0700 2932 2933 There are just 2 changes that cause different generated tzdata files from 2934 zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil 2935 is included, but commented out. Compared with the diff I sent out last week, 2936 this version also includes attributions for the sources for the changes 2937 (in much the same format as ado used, but the html tags have not been 2938 checked, verified, or used in any way at all, so if there are errors there, 2939 please let me know.) 2940 2941 2942 Release data2011k - 2011-09-20 17:54:03 -0400 2943 2944 [not summarized] 2945 2946 2947 Release data2011j - 2011-09-12 09:22:49 -0400 2948 2949 (contemporary changes for Samoa; past changes for Kenya, Uganda, and 2950 Tanzania); there are also two spelling corrections to comments in 2951 the australasia file (with thanks to Christos Zoulas). 2952 2953 2954 Release 2011i - 2011-08-29 05:56:32 -0400 2955 2956 [not summarized] 2957 2958 2959 Release data2011h - 2011-06-15 18:41:48 -0400 2960 2961 Russia and Curaao changes 2962 2963 2964 Release 2011g - 2011-04-25 09:07:22 -0400 2965 2966 update the rules for Egypt to reflect its abandonment of DST this year 2967 2968 2969 Release 2011f - 2011-04-06 17:14:53 -0400 2970 2971 [not summarized] 2972 2973 2974 Release 2011e - 2011-03-31 16:04:38 -0400 2975 2976 Morocco, Chile, and tz-link changes 2977 2978 2979 Release 2011d - 2011-03-14 09:18:01 -0400 2980 2981 changes that impact present-day timestamps in Cuba, Samoa, and Turkey 2982 2983 2984 Release 2011c - 2011-03-07 09:30:09 -0500 2985 2986 These do affect current timestamps in Chile and Annette Island, Canada. 2987 2988 2989 Release 2011b - 2011-02-07 08:44:50 -0500 2990 2991 [not summarized] 2992 2993 2994 Release 2011a - 2011-01-24 10:30:16 -0500 2995 2996 [not summarized] 2997 2998 2999 Release data2010o - 2010-11-01 09:18:23 -0400 3000 3001 change to the end of DST in Fiji in 2011 3002 3003 3004 Release 2010n - 2010-10-25 08:19:17 -0400 3005 3006 [not summarized] 3007 3008 3009 Release 2010m - 2010-09-27 09:24:48 -0400 3010 3011 Hong Kong, Vostok, and zic.c changes 3012 3013 3014 Release 2010l - 2010-08-16 06:57:25 -0400 3015 3016 [not summarized] 3017 3018 3019 Release 2010k - 2010-07-26 10:42:27 -0400 3020 3021 [not summarized] 3022 3023 3024 Release 2010j - 2010-05-10 09:07:48 -0400 3025 3026 changes for Baha de Banderas and for version naming 3027 3028 3029 Release data2010i - 2010-04-16 18:50:45 -0400 3030 3031 the end of DST in Morocco on 2010-08-08 3032 3033 3034 Release data2010h - 2010-04-05 09:58:56 -0400 3035 3036 [not summarized] 3037 3038 3039 Release data2010g - 2010-03-24 11:14:53 -0400 3040 3041 [not summarized] 3042 3043 3044 Release 2010f - 2010-03-22 09:45:46 -0400 3045 3046 [not summarized] 3047 3048 3049 Release data2010e - 2010-03-08 14:24:27 -0500 3050 3051 corrects the Dhaka bug found by Danvin Ruangchan 3052 3053 3054 Release data2010d - 2010-03-06 07:26:01 -0500 3055 3056 [not summarized] 3057 3058 3059 Release 2010c - 2010-03-01 09:20:58 -0500 3060 3061 changes including KRE's suggestion for earlier initialization of 3062 "goahead" and "goback" structure elements 3063 3064 3065 Release code2010a - 2010-02-16 10:40:04 -0500 3066 3067 [not summarized] 3068 3069 3070 Release data2010b - 2010-01-20 12:37:01 -0500 3071 3072 Mexico changes 3073 3074 3075 Release data2010a - 2010-01-18 08:30:04 -0500 3076 3077 changes to Dhaka 3078 3079 3080 Release data2009u - 2009-12-26 08:32:28 -0500 3081 3082 changes to DST in Bangladesh 3083 3084 3085 Release 2009t - 2009-12-21 13:24:27 -0500 3086 3087 [not summarized] 3088 3089 3090 Release data2009s - 2009-11-14 10:26:32 -0500 3091 3092 (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change 3093 3094 3095 Release 2009r - 2009-11-09 10:10:31 -0500 3096 3097 "antarctica" and "tz-link.htm" changes 3098 3099 3100 Release 2009q - 2009-11-02 09:12:40 -0500 3101 3102 with two corrections as reported by Eric Muller and Philip Newton 3103 3104 3105 Release data2009p - 2009-10-23 15:05:27 -0400 3106 3107 Argentina (including San Luis) changes (with the correction from 3108 Mariano Absatz) 3109 3110 3111 Release data2009o - 2009-10-14 16:49:38 -0400 3112 3113 Samoa (commentary only), Pakistan, and Bangladesh changes 3114 3115 3116 Release data2009n - 2009-09-22 15:13:38 -0400 3117 3118 added commentary for Argentina and a change to the end of DST in 3119 2009 in Pakistan 3120 3121 3122 Release data2009m - 2009-09-03 10:23:43 -0400 3123 3124 Samoa and Palestine changes 3125 3126 3127 Release data2009l - 2009-08-14 09:13:07 -0400 3128 3129 Samoa (comments only) and Egypt 3130 3131 3132 Release 2009k - 2009-07-20 09:46:08 -0400 3133 3134 [not summarized] 3135 3136 3137 Release data2009j - 2009-06-15 06:43:59 -0400 3138 3139 Bangladesh change (with a short turnaround since the DST change is 3140 impending) 3141 3142 3143 Release 2009i - 2009-06-08 09:21:22 -0400 3144 3145 updating for DST in Bangladesh this year 3146 3147 3148 Release 2009h - 2009-05-26 09:19:14 -0400 3149 3150 [not summarized] 3151 3152 3153 Release data2009g - 2009-04-20 16:34:07 -0400 3154 3155 Cairo 3156 3157 3158 Release data2009f - 2009-04-10 11:00:52 -0400 3159 3160 correct DST in Pakistan 3161 3162 3163 Release 2009e - 2009-04-06 09:08:11 -0400 3164 3165 [not summarized] 3166 3167 3168 Release 2009d - 2009-03-23 09:38:12 -0400 3169 3170 Morocco, Tunisia, Argentina, and American Astronomical Society changes 3171 3172 3173 Release data2009c - 2009-03-16 09:47:51 -0400 3174 3175 change to the start of Cuban DST 3176 3177 3178 Release 2009b - 2009-02-09 11:15:22 -0500 3179 3180 [not summarized] 3181 3182 3183 Release 2009a - 2009-01-21 10:09:39 -0500 3184 3185 [not summarized] 3186 3187 3188 Release data2008i - 2008-10-21 12:10:25 -0400 3189 3190 southamerica and zone.tab files, with Argentina DST rule changes and 3191 United States zone reordering and recommenting 3192 3193 3194 Release 2008h - 2008-10-13 07:33:56 -0400 3195 3196 [not summarized] 3197 3198 3199 Release 2008g - 2008-10-06 09:03:18 -0400 3200 3201 Fix a broken HTML anchor and update Brazil's DST transitions; 3202 there's also a slight reordering of information in tz-art.htm. 3203 3204 3205 Release data2008f - 2008-09-09 22:33:26 -0400 3206 3207 [not summarized] 3208 3209 3210 Release 2008e - 2008-07-28 14:11:17 -0400 3211 3212 changes by Arthur David Olson and Jesper Nrgaard Welen 3213 3214 3215 Release data2008d - 2008-07-07 09:51:38 -0400 3216 3217 changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo 3218 3219 3220 Release data2008c - 2008-05-19 17:48:03 -0400 3221 3222 Pakistan, Morocco, and Mongolia 3223 3224 3225 Release data2008b - 2008-03-24 08:30:59 -0400 3226 3227 including renaming Asia/Calcutta to Asia/Kolkata, with a backward 3228 link provided 3229 3230 3231 Release 2008a - 2008-03-08 05:42:16 -0500 3232 3233 [not summarized] 3234 3235 3236 Release 2007k - 2007-12-31 10:25:22 -0500 3237 3238 most importantly, changes to the "southamerica" file based on 3239 Argentina's readoption of daylight saving time 3240 3241 3242 Release 2007j - 2007-12-03 09:51:01 -0500 3243 3244 1. eliminate the "P" (parameter) macro; 3245 3246 2. the "noncontroversial" changes circulated on the time zone 3247 mailing list (less the changes to "logwtmp.c"); 3248 3249 3. eliminate "too many transition" errors when "min" is used in time 3250 zone rules; 3251 3252 4. changes by Paul Eggert (including updated information for Venezuela). 3253 3254 3255 Release data2007i - 2007-10-30 10:28:11 -0400 3256 3257 changes for Cuba and Syria 3258 3259 3260 Release 2007h - 2007-10-01 10:05:51 -0400 3261 3262 changes by Paul Eggert, as well as an updated link to the ICU 3263 project in tz-link.htm 3264 3265 3266 Release 2007g - 2007-08-20 10:47:59 -0400 3267 3268 changes by Paul Eggert 3269 3270 The "leapseconds" file has been updated to incorporate the most 3271 recent International Earth Rotation and Reference Systems Service 3272 (IERS) bulletin. 3273 3274 There's an addition to tz-art.htm regarding the television show "Medium". 3275 3276 3277 Release 2007f - 2007-05-07 10:46:46 -0400 3278 3279 changes by Paul Eggert (including Haiti, Turks and Caicos, and New 3280 Zealand) 3281 3282 changes to zic.c to allow hour values greater than 24 (along with 3283 Paul's improved time value overflow checking) 3284 3285 3286 Release 2007e - 2007-04-02 10:11:52 -0400 3287 3288 Syria and Honduras changes by Paul Eggert 3289 3290 zic.c variable renaming changes by Arthur David Olson 3291 3292 3293 Release 2007d - 2007-03-20 08:48:30 -0400 3294 3295 changes by Paul Eggert 3296 3297 the elimination of white space at the ends of lines 3298 3299 3300 Release 2007c - 2007-02-26 09:09:37 -0500 3301 3302 changes by Paul Eggert 3303 3304 3305 Release 2007b - 2007-02-12 09:34:20 -0500 3306 3307 Paul Eggert's proposed change to the quotation handling logic in zic.c. 3308 3309 changes to the commentary in "leapseconds" reflecting the IERS 3310 announcement that there is to be no positive leap second at the end 3311 of June 2007. 3312 3313 3314 Release 2007a - 2007-01-08 12:28:29 -0500 3315 3316 changes by Paul Eggert 3317 3318 Derick Rethan's Asmara change 3319 3320 Oscar van Vlijmen's Easter Island local mean time change 3321 3322 symbolic link changes 3323 3324 3325 Release 2006p - 2006-11-27 08:54:27 -0500 3326 3327 changes by Paul Eggert 3328 3329 3330 Release 2006o - 2006-11-06 09:18:07 -0500 3331 3332 changes by Paul Eggert 3333 3334 3335 Release 2006n - 2006-10-10 11:32:06 -0400 3336 3337 changes by Paul Eggert 3338 3339 3340 Release 2006m - 2006-10-02 15:32:35 -0400 3341 3342 changes for Uruguay, Palestine, and Egypt by Paul Eggert 3343 3344 (minimalist) changes to zic.8 to clarify "until" information 3345 3346 3347 Release data2006l - 2006-09-18 12:58:11 -0400 3348 3349 Paul's best-effort work on this coming weekend's Egypt time change 3350 3351 3352 Release 2006k - 2006-08-28 12:19:09 -0400 3353 3354 changes by Paul Eggert 3355 3356 3357 Release 2006j - 2006-08-21 09:56:32 -0400 3358 3359 changes by Paul Eggert 3360 3361 3362 Release code2006i - 2006-08-07 12:30:55 -0400 3363 3364 localtime.c fixes 3365 3366 Ken Pizzini's conversion script 3367 3368 3369 Release code2006h - 2006-07-24 09:19:37 -0400 3370 3371 adds public domain notices to four files 3372 3373 includes a fix for transition times being off by a second 3374 3375 adds a new recording to the "arts" file (information courtesy Colin Bowern) 3376 3377 3378 Release 2006g - 2006-05-08 17:18:09 -0400 3379 3380 northamerica changes by Paul Eggert 3381 3382 3383 Release 2006f - 2006-05-01 11:46:00 -0400 3384 3385 a missing version number problem is fixed (with thanks to Bradley 3386 White for catching the problem) 3387 3388 3389 Release 2006d - 2006-04-17 14:33:43 -0400 3390 3391 changes by Paul Eggert 3392 3393 added new items to tz-arts.htm that were found by Paul 3394 3395 3396 Release 2006c - 2006-04-03 10:09:32 -0400 3397 3398 two sets of data changes by Paul Eggert 3399 3400 a fencepost error fix in zic.c 3401 3402 changes to zic.c and the "europe" file to minimize differences 3403 between output produced by the old 32-bit zic and the new 64-bit 3404 version 3405 3406 3407 Release 2006b - 2006-02-20 10:08:18 -0500 3408 [tz32code2006b + tz64code2006b + tzdata2006b] 3409 3410 64-bit code 3411 3412 All SCCS IDs were bumped to "8.1" for this release. 3413 3414 3415 Release 2006a - 2006-01-30 08:59:31 -0500 3416 3417 changes by Paul Eggert (in particular, Indiana time zone moves) 3418 3419 an addition to the zic manual page to describe how special-case 3420 transitions are handled 3421 3422 3423 Release 2005r - 2005-12-27 09:27:13 -0500 3424 3425 Canadian changes by Paul Eggert 3426 3427 They also add "<pre>" directives to time zone data files and reflect 3428 changes to warning message logic in "zdump.c" (but with calls to 3429 "gettext" kept unbundled at the suggestion of Ken Pizzini). 3430 3431 3432 Release 2005q - 2005-12-13 09:17:09 -0500 3433 3434 Nothing earth-shaking here: 3435 1. Electronic mail addresses have been removed. 3436 2. Casts of the return value of exit have been removed. 3437 3. Casts of the argument of is.* macros have been added. 3438 4. Indentation in one section of zic.c has been fixed. 3439 5. References to dead URLs in the data files have been dealt with. 3440 3441 3442 Release 2005p - 2005-12-05 10:30:53 -0500 3443 3444 "systemv", "tz-link.htm", and "zdump.c" changes 3445 (less the casts of arguments to the is* macros) 3446 3447 3448 Release 2005o - 2005-11-28 10:55:26 -0500 3449 3450 Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert 3451 3452 zdump.c lint fixes by Arthur David Olson 3453 3454 3455 Release 2005n - 2005-10-03 09:44:09 -0400 3456 3457 changes by Paul Eggert (both the Uruguay changes and the Kyrgyzstan 3458 et al. changes) 3459 3460 3461 Release 2005m - 2005-08-29 12:15:40 -0400 3462 3463 changes by Paul Eggert (with a small tweak to the tz-art change) 3464 3465 a declaration of an unused variable has been removed from zdump.c 3466 3467 3468 Release 2005l - 2005-08-22 12:06:39 -0400 3469 3470 changes by Paul Eggert 3471 3472 overflow/underflow checks by Arthur David Olson, minus changes to 3473 the "Theory" file about the pending addition of 64-bit data (I grow 3474 less confident of the changes being accepted with each passing day, 3475 and the changes no longer increase the data files nine-fold--there's 3476 less than a doubling in size by my local Sun's reckoning) 3477 3478 3479 Release 2005k - 2005-07-14 14:14:24 -0400 3480 3481 The "leapseconds" file has been edited to reflect the recently 3482 announced leap second at the end of 2005. 3483 3484 I've also deleted electronic mail addresses from the files as an 3485 anti-spam measure. 3486 3487 3488 Release 2005j - 2005-06-13 14:34:13 -0400 3489 3490 These reflect changes to limit the length of time zone abbreviations 3491 and the characters used in those abbreviations. 3492 3493 There are also changes to handle POSIX-style "quoted" time zone 3494 environment variables. 3495 3496 The changes were circulated on the time zone mailing list; the only 3497 change since then was the removal of a couple of minimum-length of 3498 abbreviation checks. 3499 3500 3501 Release data2005i - 2005-04-21 15:04:16 -0400 3502 3503 changes (most importantly to Nicaragua and Haiti) by Paul Eggert 3504 3505 3506 Release 2005h - 2005-04-04 11:24:47 -0400 3507 3508 changes by Paul Eggert 3509 3510 minor changes to Makefile and zdump.c to produce more useful output 3511 when doing a "make typecheck" 3512 3513 3514 Release 2005g - 2005-03-14 10:11:21 -0500 3515 3516 changes by Paul Eggert (a change to current DST rules in Uruguay and 3517 an update to a link to time zone software) 3518 3519 3520 Release 2005f - 2005-03-01 08:45:32 -0500 3521 3522 data and documentation changes by Paul Eggert 3523 3524 3525 Release 2005e - 2005-02-10 15:59:44 -0500 3526 3527 [not summarized] 3528 3529 3530 Release code2005d - 2005-01-31 09:21:47 -0500 3531 3532 make zic complain about links to links if the -v flag is used 3533 3534 have "make public" do more code checking 3535 3536 add an include to "localtime.c" for the benefit of gcc systems 3537 3538 3539 Release 2005c - 2005-01-17 18:36:29 -0500 3540 3541 get better results when mktime runs on a system where time_t is double 3542 3543 changes to the data files (most importantly to Paraguay) 3544 3545 3546 Release 2005b - 2005-01-10 09:19:54 -0500 3547 3548 Get localtime and gmtime working on systems with exotic time_t types. 3549 3550 Update the leap second commentary in the "leapseconds" file. 3551 3552 3553 Release 2005a - 2005-01-01 13:13:44 -0500 3554 3555 [not summarized] 3556 3557 3558 Release code2004i - 2004-12-14 13:42:58 -0500 3559 3560 Deal with systems where time_t is unsigned. 3561 3562 3563 Release code2004h - 2004-12-07 11:40:18 -0500 3564 3565 64-bit-time_t changes 3566 3567 3568 Release 2004g - 2004-11-02 09:06:01 -0500 3569 3570 update to Cuba (taking effect this weekend) 3571 3572 other changes by Paul Eggert 3573 3574 correction of the spelling of Oslo 3575 3576 changed versions of difftime.c and private.h 3577 3578 3579 Release code2004f - 2004-10-21 10:25:22 -0400 3580 3581 Cope with wide-ranging tm_year values. 3582 3583 3584 Release 2004e - 2004-10-11 14:47:21 -0400 3585 3586 Brazil/Argentina/Israel changes by Paul Eggert 3587 3588 changes to tz-link.htm by Paul 3589 3590 one small fix to Makefile 3591 3592 3593 Release 2004d - 2004-09-22 08:27:29 -0400 3594 3595 Avoid overflow problems when TM_YEAR_BASE is added to an integer. 3596 3597 3598 Release 2004c - 2004-08-11 12:06:26 -0400 3599 3600 asctime-related changes 3601 3602 (variants of) some of the documentation changes suggested by Paul Eggert 3603 3604 3605 Release 2004b - 2004-07-19 14:33:35 -0400 3606 3607 data changes by Paul Eggert - most importantly, updates for Argentina 3608 3609 3610 Release 2004a - 2004-05-27 12:00:47 -0400 3611 3612 changes by Paul Eggert 3613 3614 Handle DST transitions that occur at the end of a month in some 3615 years but at the start of the following month in other years. 3616 3617 Add a copy of the correspondence that's the basis for claims about 3618 DST in the Navajo Nation. 3619 3620 3621 Release 2003e - 2003-12-15 09:36:47 -0500 3622 3623 changes by Arthur David Olson (primarily code changes) 3624 3625 changes by Paul Eggert (primarily data changes) 3626 3627 minor changes to "Makefile" and "northamerica" (in the latter case, 3628 optimization of the "Toronto" rules) 3629 3630 3631 Release 2003d - 2003-10-06 09:34:44 -0400 3632 3633 changes by Paul Eggert 3634 3635 3636 Release 2003c - 2003-09-16 10:47:05 -0400 3637 3638 Fix bad returns in zic.c's inleap function. 3639 Thanks to Bradley White for catching the problem! 3640 3641 3642 Release 2003b - 2003-09-16 07:13:44 -0400 3643 3644 Add a "--version" option (and documentation) to the zic and zdump commands. 3645 3646 changes to overflow/underflow checking in zic 3647 3648 a localtime typo fix. 3649 3650 Update the leapseconds and tz-art.htm files. 3651 3652 3653 Release 2003a - 2003-03-24 09:30:54 -0500 3654 3655 changes by Paul Eggert 3656 3657 a few additions and modifications to the tz-art.htm file 3658 3659 3660 Release 2002d - 2002-10-15 13:12:42 -0400 3661 3662 changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab 3663 3664 There's also a new time zone quote in "tz-art.htm". 3665 3666 3667 Release 2002c - 2002-04-04 11:55:20 -0500 3668 3669 changes by Paul Eggert 3670 3671 Change zic.c to avoid creating symlinks to files that don't exist. 3672 3673 3674 Release 2002b - 2002-01-28 12:56:03 -0500 3675 3676 [These change notes are for Release 2002a, which was corrupted. 3677 2002b was a corrected version of 2002a.] 3678 3679 changes by Paul Eggert 3680 3681 Update the "leapseconds" file to note that there'll be no leap 3682 second at the end of June, 2002. 3683 3684 Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone. 3685 3686 Change to "difftime.c" to avoid sizeof problems. 3687 3688 3689 Release 2001d - 2001-10-09 13:31:32 -0400 3690 3691 changes by Paul Eggert 3692 3693 3694 Release 2001c - 2001-06-05 13:59:55 -0400 3695 3696 changes by Paul Eggert and Andrew Brown 3697 3698 3699 Release 2001b - 2001-04-05 16:44:38 -0400 3700 3701 changes by Paul Eggert (modulo jnorgard's typo fix) 3702 3703 tz-art.htm has been HTMLified. 3704 3705 3706 Release 2001a - 2001-03-13 12:57:44 -0500 3707 3708 changes by Paul Eggert 3709 3710 An addition to the "leapseconds" file: comments with the text of the 3711 latest IERS leap second notice. 3712 3713 Trailing white space has been removed from data file lines, and 3714 repeated spaces in "Rule Jordan" lines in the "asia" file have been 3715 converted to tabs. 3716 3717 3718 Release 2000h - 2000-12-14 15:33:38 -0500 3719 3720 changes by Paul Eggert 3721 3722 one typo fix in the "art" file 3723 3724 With providence, this is the last update of the millennium. 3725 3726 3727 Release 2000g - 2000-10-10 11:35:22 -0400 3728 3729 changes by Paul Eggert 3730 3731 correction of John Mackin's name submitted by Robert Elz 3732 3733 Garry Shandling's Daylight Saving Time joke (!?!) from the recent 3734 Emmy Awards broadcast. 3735 3736 3737 Release 2000f - 2000-08-10 09:31:58 -0400 3738 3739 changes by Paul Eggert 3740 3741 Added information in "tz-art.htm" on a Seinfeld reference to DST. 3742 3743 Error checking and messages in the "yearistype" script have been 3744 improved. 3745 3746 3747 Release 2000e - 2000-07-31 09:27:54 -0400 3748 3749 data changes by Paul Eggert 3750 3751 a change to the default value of the defined constant HAVE_STRERROR 3752 3753 the addition of a Dave Barry quote on DST to the tz-arts file 3754 3755 3756 Release 2000d - 2000-04-20 15:43:04 -0400 3757 3758 changes to the documentation and code of strftime for C99 conformance 3759 3760 a bug fix for date.c 3761 3762 These are based on (though modified from) changes by Paul Eggert. 3763 3764 3765 Release 2000c - 2000-03-04 10:31:43 -0500 3766 3767 changes by Paul Eggert 3768 3769 3770 Release 2000b - 2000-02-21 12:16:29 -0500 3771 3772 changes by Paul Eggert and Joseph Myers 3773 3774 modest tweaks to the tz-art.htm and tz-link.htm files 3775 3776 3777 Release 2000a - 2000-01-18 09:21:26 -0500 3778 3779 changes by Paul Eggert 3780 3781 The two hypertext documents have also been renamed. 3782 3783 3784 Release code1999i-data1999j - 1999-11-15 18:43:22 -0500 3785 3786 Paul Eggert's changes 3787 3788 additions to the "zic" manual page and the "Arts.htm" file 3789 3790 3791 Release code1999h-data1999i - 1999-11-08 14:55:21 -0500 3792 3793 [not summarized] 3794 3795 3796 Release data1999h - 1999-10-07 03:50:29 -0400 3797 3798 changes by Paul Eggert to "europe" (most importantly, fixing 3799 Lithuania and Estonia) 3800 3801 3802 Release 1999g - 1999-09-28 11:06:18 -0400 3803 3804 data changes by Paul Eggert (most importantly, the change for 3805 Lebanon that buys correctness for this coming Sunday) 3806 3807 The "code" file contains changes to "Makefile" and "checktab.awk" to 3808 allow better checking of time zone files before they are published. 3809 3810 3811 Release 1999f - 1999-09-23 09:48:14 -0400 3812 3813 changes by Arthur David Olson and Paul Eggert 3814 3815 3816 Release 1999e - 1999-08-17 15:20:54 -0400 3817 3818 changes circulated by Paul Eggert, although the change to handling 3819 of DST-specifying time zone names has been commented out for now 3820 (search for "XXX" in "localtime.c" for details). These files also 3821 do not make any changes to the start of DST in Brazil. 3822 3823 In addition to Paul's changes, there are updates to "Arts.htm" and 3824 cleanups of URLs. 3825 3826 3827 Release 1999d - 1999-03-30 11:31:07 -0500 3828 3829 changes by Paul Eggert 3830 3831 The Makefile's "make public" rule has also been changed to do a test 3832 compile of each individual time zone data file (which should help 3833 avoid problems such as the one we had with Nicosia). 3834 3835 3836 Release 1999c - 1999-03-25 09:47:47 -0500 3837 3838 changes by Paul Eggert, most importantly the change for Chile. 3839 3840 3841 Release 1999b - 1999-02-01 17:51:44 -0500 3842 3843 changes by Paul Eggert 3844 3845 code changes (suggested by Mani Varadarajan, mani at be.com) for 3846 correct handling of symbolic links when building using a relative directory 3847 3848 code changes to generate correct messages for failed links 3849 3850 updates to the URLs in Arts.htm 3851 3852 3853 Release 1999a - 1999-01-19 16:20:29 -0500 3854 3855 error message internationalizations and corrections in zic.c and 3856 zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz, 3857 to whom thanks!) 3858 3859 3860 Release code1998h-data1998i - 1998-10-01 09:56:10 -0400 3861 3862 changes for Brazil, Chile, and Germany 3863 3864 support for use of "24:00" in the input files for the time zone compiler 3865 3866 3867 Release code1998g-data1998h - 1998-09-24 10:50:28 -0400 3868 3869 changes by Paul Eggert 3870 3871 correction to a define in the "private.h" file 3872 3873 3874 Release data1998g - 1998-08-11 03:28:35 -0000 3875 [tzdata1998g.tar.gz is missing!] 3876 3877 Lithuanian change provided by mgedmin at pub.osf.it 3878 3879 Move creation of the GMT link with Etc/GMT to "etcetera" (from 3880 "backward") to ensure that the GMT file is created even where folks 3881 don't want the "backward" links (as suggested by Paul Eggert). 3882 3883 3884 Release data1998f - 1998-07-20 13:50:00 -0000 3885 [tzdata1998f.tar.gz is missing!] 3886 3887 Update the "leapseconds" file to include the newly-announced 3888 insertion at the end of 1998. 3889 3890 3891 Release code1998f - 1998-06-01 10:18:31 -0400 3892 3893 addition to localtime.c by Guy Harris 3894 3895 3896 Release 1998e - 1998-05-28 09:56:26 -0400 3897 3898 The Makefile is changed to produce zoneinfo-posix rather than 3899 zoneinfo/posix, and to produce zoneinfo-leaps rather than 3900 zoneinfo/right. 3901 3902 data changes by Paul Eggert 3903 3904 changes from Guy Harris to provide asctime_r and ctime_r 3905 3906 A usno1998 file (substantially identical to usno1997) has been added. 3907 3908 3909 Release 1998d - 1998-05-14 11:58:34 -0400 3910 3911 changes to comments (in particular, elimination of references to CIA maps). 3912 "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places 3913 where changes occur. 3914 3915 3916 Release 1998c - 1998-02-28 12:32:26 -0500 3917 3918 changes by Paul Eggert (save the "French correction," on which I'll 3919 wait for the dust to settle) 3920 3921 symlink changes 3922 3923 changes and additions to Arts.htm 3924 3925 3926 Release 1998b - 1998-01-17 14:31:51 -0500 3927 3928 URL cleanups and additions 3929 3930 3931 Release 1998a - 1998-01-13 12:37:35 -0500 3932 3933 changes by Paul Eggert 3934 3935 3936 Release code1997i-data1997k - 1997-12-29 09:53:41 -0500 3937 3938 changes by Paul Eggert, with minor modifications from Arthur David 3939 Olson to make the files more browser friendly 3940 3941 3942 Release code1997h-data1997j - 1997-12-18 17:47:35 -0500 3943 3944 minor changes to put "TZif" at the start of each time zone information file 3945 3946 a rule has also been added to the Makefile so you can 3947 make zones 3948 to just recompile the zone information files (rather than doing a 3949 full "make install" with its other effects). 3950 3951 3952 Release data1997i - 1997-10-07 08:45:38 -0400 3953 3954 changes to Africa by Paul Eggert 3955 3956 3957 Release code1997g-data1997h - 1997-09-04 16:56:54 -0400 3958 3959 corrections for Uruguay (and other locations) 3960 3961 Arthur David Olson's simple-minded fix allowing mktime to both 3962 correctly handle leap seconds and correctly handle tm_sec values 3963 upon which arithmetic has been performed. 3964 3965 3966 Release code1997f-data1997g - 1997-07-19 13:15:02 -0400 3967 3968 Paul Eggert's updates 3969 3970 a small change to a function prototype; 3971 3972 "Music" has been renamed "Arts.htm", HTMLified, and augmented to 3973 include information on Around the World in Eighty Days. 3974 3975 3976 Release code1997e-data1997f - 1997-05-03 18:52:34 -0400 3977 3978 fixes to zic's error handling 3979 3980 changes inspired by the item circulated on Slovenia 3981 3982 The description of Web resources has been HTMLified for browsing 3983 convenience. 3984 3985 A new piece of tz-related music has been added to the "Music" file. 3986 3987 3988 Release code1997d-data1997e - 1997-03-29 12:48:52 -0500 3989 3990 Paul Eggert's latest suggestions 3991 3992 3993 Release code1997c-data1997d - 1997-03-07 20:37:54 -0500 3994 3995 changes to "zic.c" to correct performance of the "-s" option 3996 3997 a new file "usno1997" 3998 3999 4000 Release data1997c - 1997-03-04 09:58:18 -0500 4001 4002 changes in Israel 4003 4004 4005 Release 1997b - 1997-02-27 18:34:19 -0500 4006 4007 The data file incorporates the 1997 leap second. 4008 4009 The code file incorporates Arthur David Olson's take on the 4010 zic/multiprocessor/directory-creation situation. 4011 4012 4013 Release 1997a - 1997-01-21 09:11:10 -0500 4014 4015 Paul Eggert's Antarctica (and other changes) 4016 4017 Arthur David Olson finessed the "getopt" issue by checking against 4018 both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1 4019 is returned while SunOS 5.5's manual says EOF is returned). 4020 4021 4022 Release code1996o-data1996n - 1996-12-27 21:42:05 -0500 4023 4024 Paul Eggert's latest changes 4025 4026 4027 Release code1996n - 1996-12-16 09:42:02 -0500 4028 4029 link snapping fix from Bruce Evans (via Garrett Wollman) 4030 4031 4032 Release data1996m - 1996-11-24 02:37:34 -0000 4033 [tzdata1996m.tar.gz is missing!] 4034 4035 Paul Eggert's batch of changes 4036 4037 4038 Release code1996m-data1996l - 1996-11-05 14:00:12 -0500 4039 4040 No functional changes here; the files have simply been changed to 4041 make more use of ISO style dates in comments. The names of the above 4042 files now include the year in full. 4043 4044 4045 Release code96l - 1996-09-08 17:12:20 -0400 4046 4047 tzcode96k was missing a couple of pieces. 4048 4049 4050 Release 96k - 1996-09-08 16:06:22 -0400 4051 4052 the latest round of changes from Paul Eggert 4053 4054 the recent Year 2000 material 4055 4056 4057 Release code96j - 1996-07-30 13:18:53 -0400 4058 4059 Set sp->typecnt as suggested by Timothy Patrick Murphy. 4060 4061 4062 Release code96i - 1996-07-27 20:11:35 -0400 4063 4064 Paul's suggested patch for strftime %V week numbers 4065 4066 4067 Release data96i - 1996-07-01 18:13:04 -0400 4068 4069 "northamerica" and "europe" changes by Paul Eggert 4070 4071 4072 Release code96h - 1996-06-05 08:02:21 -0400 4073 4074 fix for handling transitions specified in Universal Time 4075 4076 Some "public domain" notices have also been added. 4077 4078 4079 Release code96g - 1996-05-16 14:00:26 -0400 4080 4081 fix for the simultaneous-DST-and-zone-change challenge 4082 4083 4084 Release data96h - 1996-05-09 17:40:51 -0400 4085 4086 changes by Paul Eggert 4087 4088 4089 Release code96f-data96g - 1996-05-03 03:09:59 -0000 4090 [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!] 4091 4092 The changes get us some of the way to fixing the problems noted in Paul 4093 Eggert's letter yesterday (in addition to a few others). The approach 4094 has been to make zic a bit smarter about figuring out what time zone 4095 abbreviations apply just after the time specified in the "UNTIL" part 4096 of a zone line. Putting the smarts in zic means avoiding having 4097 transition times show up in both "Zone" lines and "Rule" lines, which 4098 in turn avoids multiple transition time entries in time zone files. 4099 (This also makes the zic input files such as "europe" a bit shorter and 4100 should ease maintenance.) 4101 4102 4103 Release data96f - 1996-04-19 19:20:03 -0000 4104 [tzdata96f.tar.gz is missing!] 4105 4106 The only changes are to the "northamerica" file; the time zone 4107 abbreviation for Denver is corrected to MST (and MDT), and the 4108 comments for Mexico have been updated. 4109 4110 4111 Release data96e - 1996-03-19 17:37:26 -0500 4112 4113 Proposals by Paul Eggert, in particular the Portugal change that 4114 comes into play at the end of this month. 4115 4116 4117 Release data96d - 1996-03-18 20:49:39 -0500 4118 4119 [not summarized] 4120 4121 4122 Release code96e - 1996-02-29 15:43:27 -0000 4123 [tzcode96e.tar.gz is missing!] 4124 4125 internationalization changes and the fix to the documentation for strftime 4126 4127 4128 Release code96d-data96c - 1996-02-12 11:05:27 -0500 4129 4130 The "code" file simply updates Bob Kridle's electronic address. 4131 4132 The "data" file updates rules for Mexico. 4133 4134 4135 Release data96b - 1996-01-27 15:44:42 -0500 4136 4137 Kiribati change 4138 4139 4140 Release code96c - 1996-01-16 16:58:15 -0500 4141 4142 leap-year streamlining and binary-search changes 4143 4144 fix to newctime.3 4145 4146 4147 Release code96b - 1996-01-10 20:42:39 -0500 4148 4149 fixes and enhancements from Paul Eggert, including code that 4150 emulates the behavior of recent versions of the SunOS "date" 4151 command. 4152 4153 4154 Release 96a - 1996-01-06 09:08:24 -0500 4155 4156 Israel updates 4157 4158 fixes to strftime.c for correct ISO 8601 week number generation, 4159 plus support for two new formats ('G' and 'g') to give ISO 8601 year 4160 numbers (which are not necessarily the same as calendar year numbers) 4161 4162 4163 Release code95i-data95m - 1995-12-21 12:46:47 -0500 4164 4165 The latest revisions from Paul Eggert are included, the usno1995 4166 file has been updated, and a new file ("WWW") covering useful URLs 4167 has been added. 4168 4169 4170 Release code95h-data95l - 1995-12-19 18:10:12 -0500 4171 4172 A simplification of a macro definition, a change to data for Sudan, 4173 and (for last minute shoppers) notes in the "Music" file on the CD 4174 "Old Man Time". 4175 4176 4177 Release code95g-data95k - 1995-10-30 10:32:47 -0500 4178 4179 (slightly reformatted) 8-bit-clean proposed patch 4180 4181 minor patch: US/Eastern -> America/New_York 4182 4183 snapshot of the USNO's latest data ("usno1995") 4184 4185 some other minor cleanups 4186 4187 4188 Release code95f-data95j - 1995-10-28 21:01:34 -0000 4189 [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!] 4190 4191 European cleanups 4192 4193 support for 64-bit time_t's 4194 4195 optimization in localtime.c 4196 4197 4198 Release code95e - 1995-10-13 13:23:57 -0400 4199 4200 the mktime change to scan from future to past when trying to find time zone 4201 offsets 4202 4203 4204 Release data95i - 1995-09-26 10:43:26 -0400 4205 4206 For Canada/Central, guess that the Sun customer's "one week too 4207 early" was just a approximation, and the true error is one month 4208 too early. This is consistent with the rest of Canada. 4209 4210 4211 Release data95h - 1995-09-21 11:26:48 -0400 4212 4213 latest changes from Paul Eggert 4214 4215 4216 Release code95d - 1995-09-14 11:14:45 -0400 4217 4218 the addition of a "Music" file, which documents four recorded 4219 versions of the tune "Save That Time". 4220 4221 4222 Release data95g - 1995-09-01 17:21:36 -0400 4223 4224 "yearistype" correction 4225 4226 4227 Release data95f - 1995-08-28 20:46:56 -0400 4228 4229 Paul Eggert's change to the australasia file 4230 4231 4232 Release data95e - 1995-07-08 18:02:34 -0400 4233 4234 The only change is a leap second at the end of this year. 4235 Thanks to Bradley White for forwarding news on the leap second. 4236 4237 4238 Release data95d - 1995-07-03 13:26:22 -0400 4239 4240 Paul Eggert's changes 4241 4242 4243 Release data95c - 1995-07-02 19:19:28 -0400 4244 4245 changes to "asia", "backward", "europe", and "southamerica" 4246 (read: northamericacentrics need not apply) 4247 4248 4249 Release code95c - 1995-03-13 14:00:46 -0500 4250 4251 one-line fix for sign extension problems in detzcode 4252 4253 4254 Release 95b - 1995-03-04 11:22:38 -0500 4255 4256 Minor changes in both: 4257 4258 The "code" file contains a workaround for the lack of "unistd.h" in 4259 Microsoft C++ version 7. 4260 4261 The "data" file contains a fixed "Link" for America/Shiprock. 4262 4263 4264 Release 94h - 1994-12-10 12:51:14 -0500 4265 4266 The files: 4267 4268 * incorporate the changes to "zdump" and "date" to make changes to 4269 the "TZ" environment variable permanent; 4270 4271 * incorporate the table changes by Paul Eggert; 4272 4273 * include (and document) support for universal time specifications in 4274 data files - but do not (yet) include use of this feature in the 4275 data files. 4276 4277 Think of this as "TZ Classic" - the software has been set up not to break if 4278 universal time shows up in its input, and data entries have been 4279 left as is so as not to break existing implementations. 4280 4281 4282 Release data94f - 1994-08-20 12:56:09 -0400 4283 4284 (with thanks!) the latest data updates from Paul Eggert 4285 4286 4287 Release data94e - 1994-06-04 13:13:53 -0400 4288 4289 [not summarized] 4290 4291 4292 Release code94g - 1994-05-05 12:14:07 -0400 4293 4294 fix missing "optind.c" and a reference to it in the Makefile 4295 4296 4297 Release code94f - 1994-05-05 13:00:33 -0000 4298 [tzcode94f.tar.gz is missing!] 4299 4300 changes to avoid overflow in difftime, as well as changes to cope 4301 with the 52/53 challenge in strftime 4302 4303 4304 Release code94e - 1994-03-30 23:32:59 -0500 4305 4306 change for the benefit of PCTS 4307 4308 4309 Release 94d - 1994-02-24 15:42:25 -0500 4310 4311 Avoid clashes with POSIX semantics for zones such as GMT+4. 4312 4313 Some other very minor housekeeping is also present. 4314 4315 4316 Release code94c - 1994-02-10 08:52:40 -0500 4317 4318 Fix bug where mkdirs was broken unless you compile with 4319 -fwritable-strings (which is generally losing to do). 4320 4321 4322 Release 94b - 1994-02-07 10:04:33 -0500 4323 4324 work by Paul Eggert who notes: 4325 4326 I found another book of time zone histories by E W Whitman; it's not 4327 as extensive as Shanks but has a few goodies of its own. I used it 4328 to update the tables. I also fixed some more as a result of 4329 correspondence with Adam David and Peter Ilieve, and move some stray 4330 links from 'europe' to 'backward'. I corrected some scanning errors 4331 in usno1989. 4332 4333 As far as the code goes, I fixed zic to allow years in the range 4334 INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900. 4335 And I cleaned up the zic documentation a little bit. 4336 4337 4338 Release data94a - 1994-02-03 08:58:54 -0500 4339 4340 It simply incorporates the recently announced leap second into the 4341 "leapseconds" file. 4342 4343 4344 Release 93g - 1993-11-22 17:28:27 -0500 4345 4346 Paul Eggert has provided a good deal of historic information (based 4347 on Shanks), and there are some code changes to deal with the buglets 4348 that crawled out in dealing with the new information. 4349 4350 4351 Release 93f - 1993-10-15 12:27:46 -0400 4352 4353 Paul Eggert's changes 4354 4355 4356 Release 93e - 1993-09-05 21:21:44 -0400 4357 4358 This has updated data for Israel, England, and Kwajalein. There's 4359 also an update to "zdump" to cope with Kwajalein's 24-hour jump. 4360 Thanks to Paul Eggert and Peter Ilieve for the changes. 4361 4362 4363 Release 93d - 1993-06-17 23:34:17 -0400 4364 4365 new fix and new data on Israel 4366 4367 4368 Release 93c - 1993-06-06 19:31:55 -0400 4369 4370 [not summarized] 4371 4372 4373 Release 93b - 1993-02-02 14:53:58 -0500 4374 4375 updated "leapseconds" file 4376 4377 4378 Release 93 - 1993-01-08 07:01:06 -0500 4379 4380 At kre's suggestion, the package has been split in two - a code piece 4381 (which also includes documentation) that's only of use to folks who 4382 want to recompile things and a data piece useful to anyone who can 4383 run "zic". 4384 4385 The new version has a few changes to the data files, a few 4386 portability changes, and an off-by-one fix (with thanks to 4387 Tom Karzes at deshaw.com for providing a description and a 4388 solution). 4389 4390 4391 Release 92c - 1992-11-21 17:35:36 -0000 4392 [tz92c.tar.Z is missing!] 4393 4394 The fallout from the latest round of DST transitions. 4395 4396 There are changes for Portugal, Saskatchewan, and "Pacific-New"; 4397 there's also a change to "zic.c" that makes it portable to more systems. 4398 4399 4400 Release 92 - 1992-04-25 18:17:03 -0000 4401 [tz92.tar.Z is missing!] 4402 4403 By popular demand (well, at any rate, following a request by kre at munnari) 4404 4405 4406 The 1989 update of the time zone package featured: 4407 4408 * POSIXization (including interpretation of POSIX-style TZ environment 4409 variables, provided by Guy Harris), 4410 * ANSIfication (including versions of "mktime" and "difftime"), 4411 * SVIDulation (an "altzone" variable) 4412 * MACHination (the "gtime" function) 4413 * corrections to some time zone data (including corrections to the rules 4414 for Great Britain and New Zealand) 4415 * reference data from the United States Naval Observatory for folks who 4416 want to do additional time zones 4417 * and the 1989 data for Saudi Arabia. 4418 4419 (Since this code will be treated as "part of the implementation" in some 4420 places and as "part of the application" in others, there's no good way to 4421 name functions, such as timegm, that are not part of the proposed ANSI C 4422 standard; such functions have kept their old, underscore-free names in this 4423 update.) 4424 4425 And the "dysize" function has disappeared; it was present to allow 4426 compilation of the "date" command on old BSD systems, and a version of "date" 4427 is now provided in the package. The "date" command is not created when you 4428 "make all" since it may lack options provided by the version distributed with 4429 your operating system, or may not interact with the system in the same way 4430 the native version does. 4431 4432 Since POSIX frowns on correct leap second handling, the default behavior of 4433 the "zic" command (in the absence of a "-L" option) has been changed to omit 4434 leap second information from its output files. 4435 4436 4437 ----- 4438 Notes 4439 4440 This file contains copies of the part of each release announcement 4441 that talks about the changes in that release. The text has been 4442 adapted and reformatted for the purposes of this file. 4443 4444 Traditionally a release R consists of a pair of tarball files, 4445 tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g., 4446 code2010a, data2012c) consist of just one or the other tarball, and a 4447 few (e.g., code2012c-data2012d) have tarballs with mixed version 4448 numbers. Recent releases also come in an experimental format 4449 consisting of a single tarball tzdb-R.tar.lz with extra data. 4450 4451 Release timestamps are taken from the release's commit (for newer, 4452 Git-based releases), from the newest file in the tarball (for older 4453 releases, where this info is available) or from the email announcing 4454 the release (if all else fails; these are marked with a time zone of 4455 -0000 and an "is missing!" comment). 4456 4457 Earlier versions of the code and data were not announced on the tz 4458 list and are not summarized here. 4459 4460 This file is in the public domain. 4461 4462 Local Variables: 4463 coding: utf-8 4464 End: 4465
Indexes created Mon Sep 29 03:10:08 GMT 2025