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tz database

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468:# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule US 1918 1919 - Mar lastSun 2:00 1:00 D Rule US 1918 1919 - Oct lastSun 2:00 0 S Rule US 1942 only - Feb 9 2:00 1:00 W # War Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace Rule US 1945 only - Sep 30 2:00 0 S Rule US 1967 2006 - Oct lastSun 2:00 0 S Rule US 1967 1973 - Apr lastSun 2:00 1:00 D Rule US 1974 only - Jan 6 2:00 1:00 D Rule US 1975 only - Feb 23 2:00 1:00 D Rule US 1976 1986 - Apr lastSun 2:00 1:00 D Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D Rule US 2007 max - Mar Sun>=8 2:00 1:00 D Rule US 2007 max - Nov Sun>=1 2:00 0 S .... # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule NYC 1920 only - Mar lastSun 2:00 1:00 D Rule NYC 1920 only - Oct lastSun 2:00 0 S Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D Rule NYC 1921 1954 - Sep lastSun 2:00 0 S Rule NYC 1955 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT Zone America/New_York -4:56:02 - LMT 1883 November 18, 12:03:58 -5:00 US E%sT 1920 -5:00 NYC E%sT 1942 -5:00 US E%sT 1946 -5:00 NYC E%sT 1967 -5:00 US E%sT 33: 209:
is the rule then in effect), the type of year to which the rule applies ("-" if it applies to all years in the specified range, which is almost always the case, otherwise a name used as an argument to a script that indicates whether the year is of the specified type), the month in which the rule takes effect, the day on which the rule takes effect (which could either be a specific day or a specification such as "the last Sunday of the month"), the time of day at which the rule takes effect, the amount of time to add to the
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in the traditional North American mountain time zone can choose from the timezones America/Denver which observes US-style daylight saving time (DST), and America/Phoenix which does not observe DST. Applications that also deal with past timestamps in the mountain time zone can choose from over a dozen timezones, such as America/Boise, America/Edmonton, and America/Hermosillo, each of which currently uses mountain time but differs from other timezones for some timestamps after 1970.
1153:, by Thomas G. Shanks and Rique Pottenger. It complained of unauthorised reproduction of atlas data in the timezone mailing list archive and in some auxiliary link collections maintained with the database, though it did not actually point at the database itself. The complaint related only to the compilation of historical timezone data, and did not cover extant tzdata world timezone tables. 333:
another city may be selected if it is more widely known, and another location, including a location other than a city, may be used if it results in a less ambiguous name. In the event that the name of the location used to represent the timezone changes, the convention is to create an alias in future editions so that both the old and new names refer to the same database entry.
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are specified in named rule sets. Each rule set has one or more rule lines in the text files. A rule line contains the name of the rule set to which it belongs, the first year in which the rule applies, the last year in which the rule applies (or "only" if it applies only in one year or "max" if it
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If a name is changed, put its old spelling in the 'backward' file. This means old spellings will continue to work. Ordinarily a name change should occur only in the rare case when a location's consensus English-language spelling changes; for example, in 2008 Asia/Calcutta was renamed to Asia/Kolkata
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For each timezone that has multiple offsets (usually due to daylight saving time), the tz database records the exact moment of transition. The format can accommodate changes in the dates and times of transitions as well. Zones may have historical rule changes going back many decades (as shown in the
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Each timezone has one or more "zone lines" in one of the tz database text files. The first zone line for a timezone gives the name of the timezone; any subsequent zone lines for that timezone leave the name blank, indicating that they apply to the same zone as the previous line. Each zone line for
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Each timezone typically corresponds to a geographical region that is smaller than a traditional time zone, because clocks in a timezone all agree after 1970 whereas a traditional time zone merely specifies current standard time. For example, applications that deal with current and future timestamps
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The ECMAScript 2015 Internationalization API Specification identifies time zones using the Zone and Link names of the IANA Time Zone Database. Their canonical form is the corresponding Zone name in the casing used in the IANA Time Zone Database. ... It is recommended that implementations use the
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Country names are not normally used in this scheme, primarily because they would not be robust, owing to frequent political and boundary changes. The names of large cities tend to be more permanent. Usually the most populous city in a region is chosen to represent the entire timezone, although
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Use only valid POSIX file name components (i.e., the parts of names other than '/'). Do not use the file name components '.' and '..'. Within a file name component, use only ASCII letters, '.', '-' and '_'. Do not use digits, as that might create an ambiguity with POSIX TZ strings. A file name
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sign-degrees-minutes-seconds format, # either +-DDMM+-DDDMM or +-DDMMSS+-DDDMMSS, # first latitude (+ is north), then longitude (+ is east). # 3. Zone name used in value of TZ environment variable. # 4. Comments; present if and only if the country has multiple rows. # # Columns are
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The tz reference code and database is maintained by a group of volunteers. Arthur David Olson makes most of the changes to the tz reference code. Paul Eggert makes most of the changes to the tz database. Proposed changes are sent to the tz mailing list, which is gatewayed to the comp.time.tz
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Here are the general guidelines used for choosing timezone names, in decreasing order of importance: ... If a name is ambiguous, use a less ambiguous alternative; e.g., many cities are named San José and Georgetown, so prefer America/Costa_Rica to America/San_Jose and America/Guyana to
624:, compiled, and then the source and binaries are packaged as part of that distribution. End users can either rely on their software distribution's update procedures, which may entail some delay, or obtain the source directly and build the binary files themselves. The 1113:(ICU). For example, the CLDR Windows–Tzid table maps Microsoft Windows time zone IDs to the standard Olson names, although such a mapping cannot be perfect because the number of time zones in Windows systems is significantly lower than in the IANA TZ database. 229:", e.g. "America/New_York". A choice was also made to use English names or equivalents, and to omit punctuation and common suffixes. The underscore character is used in place of spaces. Hyphens are used where they appear in the name of a location. The 340:
is itself represented as a compound name, for example the timezone "America/Indiana/Indianapolis". Three-level names include those under "America/Argentina/...", "America/Kentucky/...", "America/Indiana/...", and "America/North_Dakota/...".
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Keep locations compact. Use cities or small islands, not countries or regions, so that any future changes do not split individual locations into different timezones. E.g., prefer Europe/Paris to Europe/France, since France has had multiple
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America/Georgetown. ... Use the most populous among locations in a region, e.g., prefer Asia/Shanghai to Asia/Beijing. Among locations with similar populations, pick the best-known location, e.g., prefer Europe/Rome to Europe/Milan.
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is any national region where local clocks have all agreed since 1970. This definition concerns itself first with geographic areas which have had consistent local clocks. A timezone is different from a region with a particular
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separated by a single tab. # The table is sorted first by country, then an order within the country that # (1) makes some geographical sense, and # (2) puts the most populous zones first, where that does not contradict (1).
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Data before 1970 aims to be correct for the city identifying the region, but is not necessarily correct for the entire region. This is because new regions are created only as required to distinguish clocks since 1970.
196:(or a hyphen if standard time always applies), the format for time zone abbreviations, and, for all but the last zone line, the date and time at which the range of date and time governed by that line ends. 1973: 2038: 213:
when the rule is in effect, and the letter or letters to use in the time zone abbreviation (for example, "S" if the rule governs standard time and "D" if it governs daylight saving time).
1790: 139:, which is often referred to as a "time zone". Therefore, each of the timezones defined by the tz database may use multiple offsets from UTC, such as offsets for standard time and 344:
The location selected is representative for the entire area. However, if there were differences within the area before 1970, the time zone rules only apply in the named location.
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The oceans are included since some islands are hard to connect to a certain continent. Some are geographically connected to one continent and politically to another. See also
461: 60:, primarily intended for use with computer programs and operating systems. Paul Eggert has been its editor and maintainer since 2005, with the organizational backing of 2123: 1179:
took responsibility for the maintenance of the database on 14 October 2011. The full database and a description of plans for its maintenance are available online from
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language specification for Internationalization explicitly specifies the usage of IANA Time Zone names for API, and recommends the usage of the time zone data as well.
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component must not exceed 14 characters or start with '-'. E.g., prefer Asia/Brunei to Asia/Bandar_Seri_Begawan. Exceptions: see the discussion of legacy names below.
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convention. In the "Etc" area, zones west of GMT have a positive sign and those east have a negative sign in their name (e.g "Etc/GMT-14" is 14 hours ahead of GMT).
1965: 1911: 2155: 2360: 2334: 689:(CLDR) refers to zones in the tz database. However, as the name for a zone can change from one tz database release to another, the CLDR assigns the 2025: 2071: 448:
These are rule lines for the standard United States daylight saving time rules, rule lines for the daylight saving time rules in effect in the US
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The tz database partitions the world into regions where local clocks all show the same time. This map was made by combining version 2023d of the
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There are two zones that cover an area that was covered by two countries after 1970. The database follows the definitions of countries as per
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Geographical boundaries in the form of coordinate sets are not part of the tz database, but boundaries are published by Evan Siroky in
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for the city used in the name for the zone, or an internally-assigned code if there is no such city for the zone, to a tzdb zone.
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6.1 and later (earlier versions of AIX, starting with AIX 5.2, include zoneinfo, for support of third-party applications such as
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is in the public domain and lists the zones. Columns and row sorting are described in the comments of the file, as follows:
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is the city representing that zone) in some years, and zone lines for the America/New_York timezone, as of release version
95:, was designed by Paul Eggert. The database attempts to record historical time zones and all civil changes since 1970, the 1505: 1180: 77: 927: 620:. Source files are distributed via the IANA FTP server. Typically, these files are taken by a software distributor like 437:
the apostrophe is removed. The space would normally be replaced with "_", but the name would then exceed 14 characters.
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used, because it was the most populous city in the zone at the time the zone was set up, though this is no longer true
2300: 494: 449: 168: 1940:. Academic Computing and Communications Center, University of Illinois at Chicago. 25 February 2007. Archived from 3048: 3043: 373: 2125:
Oracle Database Globalization Support Guide 10g Release 1 (10.1): Chapter 4, Section "Choosing a Time Zone File"
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The tz database is used for time zone processing and conversions in many computer software systems, including:
37: 636:, "Procedures for Maintaining the Time Zone Database" documenting best practices based on similar principles. 3028: 2386: 2212: 1225: 1106: 960: 869: 686: 306:
The special area of "Etc" is used for some administrative zones, particularly for "Etc/UTC" which represents
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was rejected in 2010 with the reasoning that, since 1970, the clocks were the same in the whole region.
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which list the rules and zone transitions in a human-readable format. For use, these text files are
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style, those zone names beginning with "Etc/GMT" have their sign reversed from the standard
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is the name of a specific location within the area – usually a city or small island.
167:(zone information compiler), as well as code to read those files and use them in standard 32: 8: 3090: 3033: 3020: 1562: 573: 315: 3038: 2963: 2855: 2743: 2661: 2599: 2129: 1165: 744: 363: 2450: 2441: 1694: 1660: 1626: 1592: 1475: 1527: 1080: 1027: 949: 531: 424: 410: 953: 2728: 2530: 2034: 1146: 843: 629: 617: 380: 1137:
in the database. As a result, on 6 October 2011, the database's mailing list and
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site were shut down. The case revolved around the database maintainers' use of
633: 2959: 2859: 2595: 2238:"ASTROLABE, INC., Plaintiff, v. ARTHUR DAVID OLSON and PAUL EGGERT, Defendants" 1501: 919: 519: 277: 899: 163:—one per timezone. The reference source code includes such a compiler called 3079: 2721: 2715: 2710: 2705: 2700: 2695: 2690: 2684: 2678: 2673: 2651: 2646: 2640: 2634: 2629: 2624: 2618: 2612: 2607: 2575: 1012: 736: 721: 591: 541: 453: 404: 368:
name of country used because the name of the largest city (and capital city)
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For example, between 1963-10-23 and 1963-12-09 in Brazil only the states of
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This lawsuit was resolved on 22 February 2012 after the involvement of the
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due to long-time widespread use of the new city name instead of the old.
1563:"proposed time zone package changes (Bahia de Banderas; version naming)" 2991: 2986: 2981: 2976: 2971: 2948: 2942: 2937: 2932: 2926: 2920: 2915: 2909: 2902: 2896: 2890: 2883: 2877: 2872: 2867: 2845: 2839: 2833: 2828: 2822: 2816: 2811: 2806: 2801: 2795: 2789: 2783: 2776: 2770: 2764: 2757: 2751: 2571: 1069: 884: 804: 756: 585: 577: 562: 265: 210: 189: 136: 895: 3005: 2514: 2459: 1197: 1134: 1046: 997: 986: 891: 690: 674: 653: 249: 152: 96: 53: 27:
Collaborative compilation of information about the world's time zones
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Its uniform naming convention for entries in the database, such as
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the defendants and agreed to a covenant not to sue in the future.
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of the time zone database. The zone and rule lines reflect the
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is a collaborative compilation of information about the world's
1230: 993: 975: 812: 760: 713: 621: 493:# This file contains a table with the following columns: # 1. 285: 257: 2132:. June 2004. pp. 4–14. Part No. B10749-02. Archived from 1322:"Resolved timezone issue? Other issues. New ctime manual page" 556: 2520: 2502: 2481: 1912:"AIX O/S updated to support 2007 Daylight Saving Time change" 1176: 1004: 808: 784: 725: 649: 311: 253: 84:, referring to the founding contributor, Arthur David Olson. 61: 565:, whose predecessor, ISO 3166, was first published in 1974. 192:
for standard time, the name of the set of rules that govern
2456:"A literary appreciation of the Olson/Zoneinfo/tz database" 1963: 1938:"2007 daylight savings [sic] time changes for Unix" 1835:"Unicode Locale Data Markup Language (LDML), Part 4: Dates" 912: 835: 800: 796: 748: 625: 273: 2476: 1101:
embedded software such as the firmware used in IP clocks.
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used daylight saving time rules different from Berlin's.
2183:"seismo!elsie!tz ; new versions of time zone stuff" 2064:"ECMAScript 2015 Internationalization API Specification" 923: 2509:(gives the syntax of source files for the tz database) 2158:. Unicode Consortium. 12 November 2007. Archived from 2085:
time zone information of the IANA Time Zone Database.
1219: 1217: 2560: 2359:. Electronic Frontier Foundation. 22 February 2012. 1105:
The Olson timezone IDs are also used by the Unicode
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a zone specifies, for a range of date and time, the
427:, because correct name has more than 14 characters 199: 2319: 1214: 1121:The project's origins go back to 1986 or earlier. 2271:"Civil suit; ftp shutdown; mailing list shutdown" 530:had summer time. However, a requested split from 3077: 2527:(gives the format of compiled tz database files) 2098:"TZDB library moved to GitHub on April 23, 2014" 2027:Release 4.0 Change Notes for the Sun Workstation 1811:. CLDR – Unicode Common Locale Data Repository. 1274:"Re: FW: IANA time zone registration – proposal" 1906: 1904: 1502:"Theory and pragmatics of the tz code and data" 644:The standard path for the timezone database is 256:, or "Etc". The continents and oceans used are 2262: 443: 237:names have a maximum length of 14 characters. 2546: 2437:(deprecated, see Official IANA sources below) 1964:Wickremasinghe, Christopher (30 March 2009). 1791:"DST and midsummer DST in Germany until 1979" 1699:Theory and pragmatics of the tz code and data 1665:Theory and pragmatics of the tz code and data 1631:Theory and pragmatics of the tz code and data 1597:Theory and pragmatics of the tz code and data 1532:Theory and pragmatics of the tz code and data 221:The timezones have unique names in the form " 2357:"EFF Wins Protection for Time Zone Database" 2232: 2230: 1901: 1853: 472: 1809:"Unicode Locale Extension ('u') for BCP 47" 1727: 1476:"zoneinfo tzcode and tzdata archives (FTP)" 557:Zones covering multiple post-1970 countries 409:name of island used, because largest city, 122: 2553: 2539: 2327:"Time-zone database – Astrolabe's opinion" 696: 664: 544:, is incorrect for the year 1945 when the 2227: 2056: 1887:"Managing the Time Zone Variable (POSIX)" 1247:"Time zone and daylight saving time data" 680: 151:The tz database is published as a set of 2465: 2181:Olson, Arthur David (24 November 1986). 1320:Olson, Arthur David (16 December 1986). 106:The database, as well as some reference 31: 2505:Administration and Privileged Commands 1957: 1244: 659: 602:(ISO 3166-1: DD, ISO 3166-3: DDDE) and 14: 3078: 2269:Olson, Arthur David (6 October 2011). 2193:from the original on 26 September 2024 2006:from the original on 14 September 2018 1914:. IBM. 18 October 2007. Archived from 1759:Olson, Arthur David (6 January 2010). 1730:"Re: zoneinfo : ist : error" 1705:from the original on 26 September 2024 1637:from the original on 26 September 2024 1603:from the original on 26 September 2024 1482:from the original on 26 September 2024 1443: 1412: 1363:from the original on 27 September 2016 1350: 1297:(news alert). ICANN. 15 October 2011. 1271: 1223: 2534: 2363:from the original on 23 February 2012 2268: 2180: 2104:from the original on 24 February 2021 1879: 1795:Physikalisch-Technische Bundesanstalt 1758: 1560: 1382:Olson, Arthur David (18 March 1987). 1381: 1319: 1301:from the original on 13 December 2014 913:pandas – Python Data Analysis Library 216: 2389:from the original on 17 October 2011 2337:from the original on 14 October 2011 2074:from the original on 26 October 2019 1976:from the original on 24 October 2012 1415:"leap seconds; [0-60] is ok" 1295:"ICANN to Manage Time Zone Database" 1289: 1287: 1111:International Components for Unicode 639: 584:(People's Republic, ISO 3166-1: YD, 2243:. 30 September 2011. Archived from 1861:"Olson time zone support and setup" 1245:Eggert, Paul; Olson, Arthur David. 890:Numerous libraries also available: 739:and systems that use it, including 505: 462:history of DST in the United States 159:into a set of platform-independent 78:Internet Assigned Numbers Authority 64:. The tz database is also known as 24: 1841:from the original on 23 March 2018 1771:from the original on 25 April 2019 1761:"RE: little nuance in brazil 1963" 1561:Olson, Arthur David (1 May 2010). 1538:from the original on 17 April 2024 1425:from the original on 11 April 2016 572: – two countries until 1990: 25: 3102: 2586:Italics: historical or unofficial 2404: 2281:from the original on 8 March 2021 2044:from the original on 7 March 2022 1815:from the original on 28 July 2011 1671:from the original on 5 March 2021 1573:from the original on 8 March 2021 1508:from the original on 5 March 2021 1456:from the original on 8 March 2021 1444:Eggert, Paul (11 November 1995). 1394:from the original on 8 March 2021 1332:from the original on 9 March 2021 1284: 1253:from the original on 8 March 2021 1129:On 30 September 2011, a lawsuit, 495:ISO 3166 2-character country code 117: 44:data, using open source software. 2213:"Astrolabe, Inc. v. Olson et al" 1740:from the original on 30 May 2022 1728:Paul Eggert (21 December 2012). 1351:Eggert, Paul (20 October 1993). 1272:Eggert, Paul (17 January 2005). 1171: 1164:the lawsuit without having ever 787:, but do not use it themselves); 200:Daylight saving time (DST) rules 3049:Daylight saving time by country 2484:, at rsync://rsync.iana.org/tz/ 2375: 2349: 2293: 2205: 2174: 2148: 2116: 2090: 2018: 1988: 1930: 1827: 1801: 1783: 1752: 1721: 1687: 1653: 1619: 1585: 1554: 1520: 1494: 1468: 1224:Siroky, Evan (1 January 2024). 1131:Astrolabe, Inc. v. Olson et al. 1124: 385:Space replaced with underscore 310:. In order to conform with the 146: 2301:"Time zone database shut down" 2037:. 19 January 1987. p. 4. 1837:. section 5, Time Zone Names. 1437: 1406: 1375: 1353:"proposal for time zone names" 1344: 1313: 1265: 1238: 1193:List of tz database time zones 1158:Electronic Frontier Foundation 828:since release 1.8 (2014), see 610: 413:, has more than 14 characters 38:List of tz database time zones 13: 1: 1208: 1160:, when Astrolabe voluntarily 1107:Common Locale Data Repository 687:Common Locale Data Repository 301:Boundaries between continents 2488: 1226:"Time Zone Boundary Builder" 1081:SQL Server Time Zone Support 876:module, and the third-party 852:releases since 5.1.0 (2005); 708:-derived systems, including 594: – two countries until 182: 7: 2443:The tz mailing list archive 2070:(2nd ed.). June 2015. 1413:Devine, Bob (2 June 1988). 1186: 911:the Pandas (Python) module 551: 481: 444:Example zone and rule lines 347: 321: 80:), and occasionally as the 10: 3107: 2562:Coordinated Universal Time 2409: 1528:"Scope of the tz database" 1116: 1066:releases since 10g (2004); 1019:chrono standard library's 769:-derived systems, such as 580:: YE; capital Sana'a) and 540:, which is represented by 308:Coordinated Universal Time 127:Within the tz database, a 3057: 3019: 3004: 2958: 2854: 2738: 2660: 2594: 2569: 2432:The tz database home page 2331:Stephen Colebourne's blog 1072:since release 8.0 (2005); 473:Data stored for each zone 433:Antarctica/DumontDUrville 3034:Time zones by UTC offset 937:24 December 2017 at the 826:Java Runtime Environment 648:in Linux distributions, 466: 123:Definition of a timezone 56:and rules for observing 3065:Abolition of time zones 3044:Time zone abbreviations 2451:tz mailing list at IANA 1151:The International Atlas 1133:, was filed concerning 1096:Timezone package in pub 697:Use in software systems 665:Boundaries of timezones 588:: YDYE; capital: Aden). 240: 99:epoch. It also records 74:IANA time zone database 18:IANA time zone database 2068:ecma-international.org 1889:. IBM. 2 February 2007 1695:"Timezone identifiers" 1661:"Timezone identifiers" 1627:"Timezone identifiers" 1593:"Timezone identifiers" 681:Use in other standards 419:America/Bahia_Banderas 45: 3029:Time zones by country 2466:Official IANA sources 2000:developer.android.com 1865:AIX 7.3 Documentation 1054:Tool Command Language 35: 2580:Daylight saving time 2383:"Time Zone Database" 1384:"Re: List of issues" 1203:Daylight saving time 1077:Microsoft SQL Server 844:DateTime::LeapSecond 660:Usage and extensions 646:/usr/share/zoneinfo/ 206:daylight saving time 194:daylight saving time 141:daylight saving time 58:daylight saving time 3021:Lists of time zones 2333:. 13 October 2011. 799:systems, including 745:Linux distributions 3039:Military time zone 2136:on 1 December 2008 2130:Oracle Corporation 1143:The American Atlas 1088:since release 3.6; 840:DateTime::TimeZone 767:System V Release 4 423:"de" removed from 364:America/Costa_Rica 336:In some cases the 217:Names of timezones 46: 3073: 3072: 3000: 2999: 1021:std::chrono::tzdb 974:standard library 872:standard library 652:, and some other 640:Unix-like systems 532:America/Sao_Paulo 452:(called "NYC" as 450:Eastern Time Zone 441: 440: 425:Bahia de Banderas 411:Yuzhno-Sakhalinsk 248:is the name of a 70:zoneinfo database 16:(Redirected from 3098: 2592: 2591: 2588: 2555: 2548: 2541: 2532: 2531: 2518: 2517: 2500: 2499: 2446: 2436: 2425: 2423: 2399: 2398: 2396: 2394: 2379: 2373: 2372: 2370: 2368: 2353: 2347: 2346: 2344: 2342: 2323: 2317: 2316: 2314: 2312: 2307:. 6 October 2011 2305:The Daily Parker 2297: 2291: 2290: 2288: 2286: 2277:(Mailing list). 2266: 2260: 2259: 2257: 2255: 2250:on 14 March 2012 2249: 2242: 2234: 2225: 2224: 2222: 2220: 2215:. 6 October 2011 2209: 2203: 2202: 2200: 2198: 2189:(Mailing list). 2178: 2172: 2171: 2169: 2167: 2156:"Windows → Tzid" 2152: 2146: 2145: 2143: 2141: 2120: 2114: 2113: 2111: 2109: 2094: 2088: 2087: 2081: 2079: 2060: 2054: 2053: 2051: 2049: 2043: 2035:Sun Microsystems 2032: 2022: 2016: 2015: 2013: 2011: 1992: 1986: 1985: 1983: 1981: 1961: 1955: 1953: 1951: 1949: 1944:on 5 August 2012 1934: 1928: 1927: 1925: 1923: 1918:on 11 April 2016 1908: 1899: 1898: 1896: 1894: 1883: 1877: 1876: 1874: 1872: 1857: 1851: 1850: 1848: 1846: 1831: 1825: 1824: 1822: 1820: 1805: 1799: 1798: 1787: 1781: 1780: 1778: 1776: 1767:(Mailing list). 1756: 1750: 1749: 1747: 1745: 1736:(Mailing list). 1725: 1719: 1718: 1712: 1710: 1691: 1685: 1684: 1678: 1676: 1657: 1651: 1650: 1644: 1642: 1623: 1617: 1616: 1610: 1608: 1589: 1583: 1582: 1580: 1578: 1569:(Mailing list). 1558: 1552: 1551: 1545: 1543: 1524: 1518: 1517: 1515: 1513: 1498: 1492: 1491: 1489: 1487: 1472: 1466: 1465: 1463: 1461: 1452:(Mailing list). 1441: 1435: 1434: 1432: 1430: 1421:(Mailing list). 1410: 1404: 1403: 1401: 1399: 1390:(Mailing list). 1379: 1373: 1372: 1370: 1368: 1359:(Mailing list). 1348: 1342: 1341: 1339: 1337: 1328:(Mailing list). 1317: 1311: 1310: 1308: 1306: 1291: 1282: 1281: 1269: 1263: 1262: 1260: 1258: 1242: 1236: 1235: 1221: 1162:moved to dismiss 1147:Thomas G. Shanks 1022: 896:BigEasy/TimeZone 830:java.time.ZoneId 647: 618:Usenet newsgroup 606:(ISO 3166-1: DE) 506:Data before 1970 478:example above). 395:name of city of 381:America/New_York 352: 351: 178: 174: 89:America/New_York 21: 3106: 3105: 3101: 3100: 3099: 3097: 3096: 3095: 3076: 3075: 3074: 3069: 3053: 3015: 2996: 2954: 2850: 2734: 2656: 2584: 2583: 2570: 2565: 2559: 2513: 2512: 2495: 2494: 2491: 2468: 2440: 2429: 2421: 2415: 2412: 2407: 2402: 2392: 2390: 2381: 2380: 2376: 2366: 2364: 2355: 2354: 2350: 2340: 2338: 2325: 2324: 2320: 2310: 2308: 2299: 2298: 2294: 2284: 2282: 2267: 2263: 2253: 2251: 2247: 2240: 2236: 2235: 2228: 2218: 2216: 2211: 2210: 2206: 2196: 2194: 2179: 2175: 2165: 2163: 2154: 2153: 2149: 2139: 2137: 2122: 2121: 2117: 2107: 2105: 2096: 2095: 2091: 2077: 2075: 2062: 2061: 2057: 2047: 2045: 2041: 2030: 2024: 2023: 2019: 2009: 2007: 1994: 1993: 1989: 1979: 1977: 1962: 1958: 1947: 1945: 1936: 1935: 1931: 1921: 1919: 1910: 1909: 1902: 1892: 1890: 1885: 1884: 1880: 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3052: 3051: 3046: 3041: 3036: 3031: 3025: 3023: 3017: 3016: 3011: 3009: 3002: 3001: 2998: 2997: 2995: 2994: 2989: 2984: 2979: 2974: 2968: 2966: 2956: 2955: 2953: 2952: 2945: 2940: 2935: 2930: 2923: 2918: 2913: 2906: 2899: 2894: 2887: 2880: 2875: 2870: 2864: 2862: 2852: 2851: 2849: 2848: 2843: 2836: 2831: 2826: 2819: 2814: 2809: 2804: 2799: 2792: 2787: 2780: 2773: 2768: 2761: 2754: 2748: 2746: 2736: 2735: 2733: 2732: 2725: 2718: 2713: 2708: 2703: 2698: 2693: 2688: 2681: 2676: 2670: 2668: 2658: 2657: 2655: 2654: 2649: 2644: 2637: 2632: 2627: 2622: 2615: 2610: 2604: 2602: 2589: 2567: 2566: 2558: 2557: 2550: 2543: 2535: 2529: 2528: 2510: 2490: 2487: 2486: 2485: 2479: 2474: 2467: 2464: 2463: 2462: 2453: 2448: 2438: 2427: 2411: 2408: 2406: 2405:External links 2403: 2401: 2400: 2374: 2348: 2318: 2292: 2261: 2226: 2204: 2173: 2147: 2115: 2089: 2055: 2017: 1987: 1956: 1929: 1900: 1878: 1852: 1826: 1800: 1782: 1751: 1720: 1686: 1652: 1618: 1584: 1553: 1519: 1493: 1467: 1436: 1405: 1374: 1343: 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IBM. 1429:18 June 1117:History 1086:MongoDB 963:module 946:Haskell 819:OpenVMS 791:Android 771:Solaris 743:, most 718:OpenBSD 710:FreeBSD 671:GeoJSON 546:Trizone 397:Kolkata 294:Pacific 262:America 72:or the 2992:+14:00 2987:+13:45 2982:+13:00 2977:+12:45 2972:+12:00 2949:+11:30 2943:+11:00 2938:+10:30 2933:+10:00 2927:+09:45 2921:+09:30 2916:+09:00 2910:+08:45 2903:+08:30 2897:+08:00 2891:+07:30 2884:+07:20 2878:+07:00 2873:+06:30 2868:+06:00 2846:+05:45 2840:+05:40 2834:+05:30 2829:+05:00 2823:+04:51 2817:+04:30 2812:+04:00 2807:+03:30 2802:+03:00 2796:+02:30 2790:+02:00 2784:+01:30 2777:+01:24 2771:+01:00 2765:+00:30 2758:+00:20 2752:+00:00 2722:−00:44 2716:−01:00 2711:−02:00 2706:−02:30 2701:−03:00 2696:−03:30 2691:−04:00 2685:−04:30 2679:−05:00 2674:−06:00 2652:−07:00 2647:−08:00 2641:−08:30 2635:−09:00 2630:−09:30 2625:−10:00 2619:−10:30 2613:−11:00 2608:−12:00 2525:Manual 2507:Manual 2497:zic(8) 2435:, UCLA 1231:GitHub 1166:served 1149:, and 1064:Oracle 1056:has a 1028:Delphi 1015:, and 994:Squeak 985:crate 961:Erlang 928:TZ4Net 870:Python 863:TZInfo 813:UNICOS 761:Cygwin 759:, and 728:, and 714:NetBSD 632:  622:Debian 526:, and 292:, and 290:Indian 286:Europe 270:Arctic 258:Africa 68:, the 66:tzdata 2582:(DST) 2564:(UTC) 2521:Linux 2503:Linux 2482:rsync 2422:(PDF) 2248:(PDF) 2241:(PDF) 2042:(PDF) 2031:(PDF) 1867:. 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Index

IANA time zone database

List of tz database time zones
OpenStreetMap
time zones
daylight saving time
ICANN
Internet Assigned Numbers Authority
Unix time
leap seconds
source code
public domain
standard time
offset from UTC
daylight saving time
text files
compiled
binary files
APIs
offset to UTC
daylight saving time
daylight saving time
offset to UTC
continent
ocean
Africa
America
Antarctica
Arctic
Asia

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