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Documentation for time zone support.
2018-05-08 17:54:43 +02:00
# Time Zone support (FB 4.0)
Time zone support consists of `TIME WITH TIME ZONE` and `TIMESTAMP WITH TIME ZONE` data types, expressions and statements to work with time zones and conversion between data types without/with time zones.
The first important thing to understand is that `TIME WITHOUT TIME ZONE`, `TIMESTAMP WITHOUT TIME ZONE` and `DATE` data types are defined to use the session time zone when converting from or to a `TIME WITH TIME ZONE` or `TIMESTAMP WITH TIME ZONE`. `TIME` and `TIMESTAMP` are synonymous to theirs respectively `WITHOUT TIME ZONE` data types.
Add config. parameter DefaultTimeZone.
2018-12-28 18:38:50 +01:00
The session time zone, as the name implies, can be a different one for each database attachment. It can be set with the isc_dpb_session_time_zone DPB, and if not, it starts by default defined to be the `firebird.conf` parameter `DefaultTimeZone` or the same time zone used by the Firebird OS process when the parameter is not defined. A change in `DefaultTimeZone` configuration or the OS time zone does not changes the default of a running Firebird process.
Documentation for time zone support.
2018-05-08 17:54:43 +02:00
It can then be changed with `SET TIME ZONE` statement to a given time zone or reset to its original value with `SET TIME ZONE LOCAL`.
Fixed CORE-6034 - The original time zone should be set to the current time zone at routine invocation.
2019-03-26 17:12:39 +01:00
The original time zone value is initially defined equal to the current time zone in session initialization and cannot be changed manually. But the original time zone is internally changed when a routine (function, procedure or trigger) is called to the value of the current time zone and restored to its previous value at routine exit. That means that a routine that changes the current time zone and later run `SET TIME ZONE LOCAL` will restore the current time zone to its initially received value.
Documentation for time zone support.
2018-05-08 17:54:43 +02:00
A time zone may be a string with a time zone region (for example, `America/Sao_Paulo`) or a hours:minutes displacement (for example, `-03:00`) from GMT.
A time/timestamp with time zone is considered equal to another time/timestamp with time zone if their conversion to UTC are equal, for example, `time '10:00 -02' = time '09:00 -03'`, since both are the same as `time '12:00 GMT'`. This is also valid in the context of `UNIQUE` constraints and for sorting purposes.
## Data types
```
TIME [ { WITH | WITHOUT } TIME ZONE ]
TIMESTAMP [ { WITH | WITHOUT } TIME ZONE ]
```
### Storage
TIME/TIMESTAMP WITH TIME ZONE has respectively the same storage of TIME/TIMESTAMP WITHOUT TIME ZONE plus 2 bytes for the time zone identifier or displacement.
The time/timestamp parts are stored in UTC (translated from the informed time zone).
Time zone identifiers (from regions) are put directly in the time_zone field. They start from 65535 (which is the GMT code) and are decreasing as new time zones were/are added.
Time zone displacements (+/- HH:MM) are encoded with `(sign * (HH * 60 + MM)) + 1439`. For example, a `00:00` displacement is encoded as `(1 * (0 * 60 + 0)) + 1439 = 1439` and `-02:00` as `(-1 * (2 * 60 + 0)) + 1439 = 1319`.
### API structs
```
struct ISC_TIME_TZ
{
ISC_TIME utc_time;
ISC_USHORT time_zone;
};
struct ISC_TIMESTAMP_TZ
{
ISC_TIMESTAMP utc_timestamp;
ISC_USHORT time_zone;
};
```
### API functions (FirebirdInterface.idl - IUtil interface)
```
void decodeTimeTz(
Status status,
const ISC_TIME_TZ* timeTz,
uint* hours,
uint* minutes,
uint* seconds,
uint* fractions,
uint timeZoneBufferLength,
string timeZoneBuffer
);
void decodeTimeStampTz(
Status status,
const ISC_TIMESTAMP_TZ* timeStampTz,
uint* year,
uint* month,
uint* day,
uint* hours,
uint* minutes,
uint* seconds,
uint* fractions,
uint timeZoneBufferLength,
string timeZoneBuffer
);
void encodeTimeTz(
Status status,
ISC_TIME_TZ* timeTz,
uint hours,
uint minutes,
uint seconds,
uint fractions,
const string timeZone
);
void encodeTimeStampTz(
Status status,
ISC_TIMESTAMP_TZ* timeStampTz,
uint year,
uint month,
uint day,
uint hours,
uint minutes,
uint seconds,
uint fractions,
const string timeZone
);
```
## Time zone string syntax
```
<time zone string> ::=
'<time zone>'
<time zone> ::=
<time zone region> |
[+/-] <hour displacement> [: <minute displacement>]
```
Examples:
- `'America/Sao_Paulo'`
- `'-02:00'`
- `'+04'`
- `'04:00'`
- `'04:30'`
## `TIME WITH TIME ZONE` and `TIMESTAMP WITH TIME ZONE` literals
```
<time with time zone literal> ::=
time '<time> <time zone>'
<timestamp with time zone literal> ::=
timestamp '<timestamp> <time zone>'
```
Examples:
- `time '10:00 America/Los_Angeles'`
- `time '10:00:00.5 +08'`
- `timestamp '2018-01-01 10:00 America/Los_Angeles'`
- `timestamp '2018-01-01 10:00:00.5 +08'`
## Statements and expressions
### `SET TIME ZONE` statement
Changes the session time zone.
#### Syntax
```
SET TIME ZONE { <time zone string> | LOCAL }
```
#### Examples
```
set time zone '-02:00';
set time zone 'America/Sao_Paulo';
set time zone local;
```
Add SET TIME ZONE BIND statement.
2018-07-03 17:58:37 +02:00
### `SET TIME ZONE BIND` statement
Changes the session time zone bind for compatibility with old clients.
Misc.
2018-07-04 17:59:55 +02:00
The default is `NATIVE`, which means that `TIME WITH TIME ZONE` and `TIMESTAMP WITH TIME ZONE` expressions are returned with they new data types to the client.
Add SET TIME ZONE BIND statement.
2018-07-03 17:58:37 +02:00
Misc.
2018-07-04 17:59:55 +02:00
Old clients may not understand the new data types, so it's possible to define the bind to `LEGACY` and the expressions will be returned as `TIME WITHOUT TIME ZONE` and `TIMESTAMP WITHOUT TIME ZONE`, with appropriate conversion.
Add SET TIME ZONE BIND statement.
2018-07-03 17:58:37 +02:00
The bind configuration is also applicable to input parameters.
Improvement CORE-6032 - Add DPB properties for time zone bind and decfloat configuration.
2019-04-07 16:56:02 +02:00
The initial configuration of time zone bind may be specified with DPB `isc_dpb_time_zone_bind` followed by a string with its value (case does not matter).
Add SET TIME ZONE BIND statement.
2018-07-03 17:58:37 +02:00
#### Syntax
```
SET TIME ZONE BIND { NATIVE | LEGACY }
```
#### Examples
```
set time zone bind native;
set time zone bind legacy;
```
Documentation for time zone support.
2018-05-08 17:54:43 +02:00
### `AT` expression
Translates a time/timestamp value to its correspondent value in another time zone.
If `LOCAL` is used, the value is converted to the session time zone.
#### Syntax
```
<at expr> ::=
<expr> AT { TIME ZONE <time zone string> | LOCAL }
```
#### Examples
```
select time '12:00 GMT' at time zone '-03'
from rdb$database;
select current_timestamp at time zone 'America/Sao_Paulo'
from rdb$database;
select timestamp '2018-01-01 12:00 GMT' at local
from rdb$database;
```
### `EXTRACT` expressions
Two new `EXTRACT` expressions has been added:
- `TIMEZONE_HOUR`: extracts the time zone hours displacement
- `TIMEZONE_MINUTE`: extracts the time zone minutes displacement
#### Examples
```
select extract(timezone_hour from current_time)
from rdb$database;
select extract(timezone_minute from current_timestamp)
from rdb$database;
```
### `LOCALTIME` expression
Returns the current time as a `TIME WITHOUT TIME ZONE`, i.e., in the session time zone.
#### Example
```
select localtime
from rdb$database;
```
### `LOCALTIMESTAMP` expression
Returns the current timestamp as a `TIMESTAMP WITHOUT TIME ZONE`, i.e., in the session time zone.
#### Example
```
select localtimestamp
from rdb$database;
```
Document CURRENT_TIME and CURRENT_TIMESTAMP changes.
2018-06-21 17:17:30 +02:00
# Changes in `CURRENT_TIME` and `CURRENT_TIMESTAMP`
Adjust CURRENT_TIME/CURRENT_TIMESTAMP docs.
2018-07-18 20:52:59 +02:00
In version 4.0, `CURRENT_TIME` and `CURRENT_TIMESTAMP` are changed to return `TIME WITH TIME ZONE` and `TIMESTAMP WITH TIME ZONE` (with time zone set to the session time zone), different than previous versions, that returned the types without time zone.
Document CURRENT_TIME and CURRENT_TIMESTAMP changes.
2018-06-21 17:17:30 +02:00
To make transition easier, `LOCALTIME` and `LOCALTIMESTAMP` was added in v3.0.4, so applications can be adjusted in v3 and migrated to v4 without funcional changes.
Documentation for time zone support.
2018-05-08 17:54:43 +02:00
Support for system packages and RDB$TIME_ZONE_UTIL system package implementation.
2018-05-25 18:06:30 +02:00
## Virtual table `RDB$TIME_ZONES`
Added RDB$TIME_ZONES virtual table.
2018-05-14 17:56:18 +02:00
This virtual table lists time zones supported in the engine.
Columns:
- `RDB$TIME_ZONE_ID` type `INTEGER`
- `RDB$TIME_ZONE_NAME` type `CHAR(63)`
Support for system packages and RDB$TIME_ZONE_UTIL system package implementation.
2018-05-25 18:06:30 +02:00
## Package `RDB$TIME_ZONE_UTIL`
This package has time zone utility functions and procedures.
### Function `DATABASE_VERSION`
`RDB$TIME_ZONE_UTIL.DATABASE_VERSION` returns the time zone database version.
Return type: `VARCHAR(10) CHARACTER SET ASCII`
```
select rdb$time_zone_util.database_version()
from rdb$database;
```
Returns:
```
DATABASE_VERSION
================
2017c
```
### Procedure `TRANSITIONS`
`RDB$TIME_ZONE_UTIL.TRANSITIONS` returns the set of rules between the start and end timestamps.
Input parameters:
- `TIME_ZONE_NAME` type `CHAR(63)`
- `FROM_TIMESTAMP` type `TIMESTAMP WITH TIME ZONE`
- `TO_TIMESTAMP` type `TIMESTAMP WITH TIME ZONE`
Output parameters:
- `START_TIMESTAMP` type `TIMESTAMP WITH TIME ZONE` - the transition' start timestamp
- `END_TIMESTAMP` type `TIMESTAMP WITH TIME ZONE` - the transition's end timestamp
- `ZONE_OFFSET` type `SMALLINT` - number of minutes related to the zone's offset
- `DST_OFFSET` type `SMALLINT` - number of minutes related to the zone's DST offset
- `EFFECTIVE_OFFSET` type `SMALLINT` - effective offset (`ZONE_OFFSET + DST_OFFSET`)
```
select *
from rdb$time_zone_util.transitions(
'America/Sao_Paulo',
timestamp '2017-01-01',
timestamp '2019-01-01');
```
Returns:
```
START_TIMESTAMP END_TIMESTAMP ZONE_OFFSET DST_OFFSET EFFECTIVE_OFFSET
============================ ============================ =========== ========== ================
2016-10-16 03:00:00.0000 GMT 2017-02-19 01:59:59.9999 GMT -180 60 -120
2017-02-19 02:00:00.0000 GMT 2017-10-15 02:59:59.9999 GMT -180 0 -180
2017-10-15 03:00:00.0000 GMT 2018-02-18 01:59:59.9999 GMT -180 60 -120
2018-02-18 02:00:00.0000 GMT 2018-10-21 02:59:59.9999 GMT -180 0 -180
2018-10-21 03:00:00.0000 GMT 2019-02-17 01:59:59.9999 GMT -180 60 -120
```
Add section "Updating the time zone database" to documentation.
2018-07-05 18:08:14 +02:00
# Updating the time zone database
Time zones are often changed and when this happen it's convenient to update the time zone database as soon as possible.
Firebird stores `WITH TIME ZONE` values translated to UTC time. If a value is created with one time zone database and later that database is updated and the update changes the information in the range of a stored value, when reading that value it will be returned as a different than the one initially stored.
Firebird uses the [IANA time zone database](http://www.iana.org/time-zones) through the ICU library. ICU library present in Firebird kit (Windows) or present in OS (Linux, POSIX) sometimes has outdated time zone database.
Misc.
2018-07-05 18:11:28 +02:00
Update procedure is described in that [ICU page](http://userguide.icu-project.org/datetime/timezone#TOC-Updating-the-Time-Zone-Data). The easiest way to update is downloading the `*.res` files in a directory and set `ICU_TIMEZONE_FILES_DIR` environment variable pointing to it.
Add section "Updating the time zone database" to documentation.
2018-07-05 18:08:14 +02:00
Documentation for time zone support.
2018-05-08 17:54:43 +02:00
# Appendix: time zone regions
Below is the list of time zone region names and IDs.
- GMT (65535)
- ACT (65534)
- AET (65533)
- AGT (65532)
- ART (65531)
- AST (65530)
- Africa/Abidjan (65529)
- Africa/Accra (65528)
- Africa/Addis_Ababa (65527)
- Africa/Algiers (65526)
- Africa/Asmara (65525)
- Africa/Asmera (65524)
- Africa/Bamako (65523)
- Africa/Bangui (65522)
- Africa/Banjul (65521)
- Africa/Bissau (65520)
- Africa/Blantyre (65519)
- Africa/Brazzaville (65518)
- Africa/Bujumbura (65517)
- Africa/Cairo (65516)
- Africa/Casablanca (65515)
- Africa/Ceuta (65514)
- Africa/Conakry (65513)
- Africa/Dakar (65512)
- Africa/Dar_es_Salaam (65511)
- Africa/Djibouti (65510)
- Africa/Douala (65509)
- Africa/El_Aaiun (65508)
- Africa/Freetown (65507)
- Africa/Gaborone (65506)
- Africa/Harare (65505)
- Africa/Johannesburg (65504)
- Africa/Juba (65503)
- Africa/Kampala (65502)
- Africa/Khartoum (65501)
- Africa/Kigali (65500)
- Africa/Kinshasa (65499)
- Africa/Lagos (65498)
- Africa/Libreville (65497)
- Africa/Lome (65496)
- Africa/Luanda (65495)
- Africa/Lubumbashi (65494)
- Africa/Lusaka (65493)
- Africa/Malabo (65492)
- Africa/Maputo (65491)
- Africa/Maseru (65490)
- Africa/Mbabane (65489)
- Africa/Mogadishu (65488)
- Africa/Monrovia (65487)
- Africa/Nairobi (65486)
- Africa/Ndjamena (65485)
- Africa/Niamey (65484)
- Africa/Nouakchott (65483)
- Africa/Ouagadougou (65482)
- Africa/Porto-Novo (65481)
- Africa/Sao_Tome (65480)
- Africa/Timbuktu (65479)
- Africa/Tripoli (65478)
- Africa/Tunis (65477)
- Africa/Windhoek (65476)
- America/Adak (65475)
- America/Anchorage (65474)
- America/Anguilla (65473)
- America/Antigua (65472)
- America/Araguaina (65471)
- America/Argentina/Buenos_Aires (65470)
- America/Argentina/Catamarca (65469)
- America/Argentina/ComodRivadavia (65468)
- America/Argentina/Cordoba (65467)
- America/Argentina/Jujuy (65466)
- America/Argentina/La_Rioja (65465)
- America/Argentina/Mendoza (65464)
- America/Argentina/Rio_Gallegos (65463)
- America/Argentina/Salta (65462)
- America/Argentina/San_Juan (65461)
- America/Argentina/San_Luis (65460)
- America/Argentina/Tucuman (65459)
- America/Argentina/Ushuaia (65458)
- America/Aruba (65457)
- America/Asuncion (65456)
- America/Atikokan (65455)
- America/Atka (65454)
- America/Bahia (65453)
- America/Bahia_Banderas (65452)
- America/Barbados (65451)
- America/Belem (65450)
- America/Belize (65449)
- America/Blanc-Sablon (65448)
- America/Boa_Vista (65447)
- America/Bogota (65446)
- America/Boise (65445)
- America/Buenos_Aires (65444)
- America/Cambridge_Bay (65443)
- America/Campo_Grande (65442)
- America/Cancun (65441)
- America/Caracas (65440)
- America/Catamarca (65439)
- America/Cayenne (65438)
- America/Cayman (65437)
- America/Chicago (65436)
- America/Chihuahua (65435)
- America/Coral_Harbour (65434)
- America/Cordoba (65433)
- America/Costa_Rica (65432)
- America/Creston (65431)
- America/Cuiaba (65430)
- America/Curacao (65429)
- America/Danmarkshavn (65428)
- America/Dawson (65427)
- America/Dawson_Creek (65426)
- America/Denver (65425)
- America/Detroit (65424)
- America/Dominica (65423)
- America/Edmonton (65422)
- America/Eirunepe (65421)
- America/El_Salvador (65420)
- America/Ensenada (65419)
- America/Fort_Nelson (65418)
- America/Fort_Wayne (65417)
- America/Fortaleza (65416)
- America/Glace_Bay (65415)
- America/Godthab (65414)
- America/Goose_Bay (65413)
- America/Grand_Turk (65412)
- America/Grenada (65411)
- America/Guadeloupe (65410)
- America/Guatemala (65409)
- America/Guayaquil (65408)
- America/Guyana (65407)
- America/Halifax (65406)
- America/Havana (65405)
- America/Hermosillo (65404)
- America/Indiana/Indianapolis (65403)
- America/Indiana/Knox (65402)
- America/Indiana/Marengo (65401)
- America/Indiana/Petersburg (65400)
- America/Indiana/Tell_City (65399)
- America/Indiana/Vevay (65398)
- America/Indiana/Vincennes (65397)
- America/Indiana/Winamac (65396)
- America/Indianapolis (65395)
- America/Inuvik (65394)
- America/Iqaluit (65393)
- America/Jamaica (65392)
- America/Jujuy (65391)
- America/Juneau (65390)
- America/Kentucky/Louisville (65389)
- America/Kentucky/Monticello (65388)
- America/Knox_IN (65387)
- America/Kralendijk (65386)
- America/La_Paz (65385)
- America/Lima (65384)
- America/Los_Angeles (65383)
- America/Louisville (65382)
- America/Lower_Princes (65381)
- America/Maceio (65380)
- America/Managua (65379)
- America/Manaus (65378)
- America/Marigot (65377)
- America/Martinique (65376)
- America/Matamoros (65375)
- America/Mazatlan (65374)
- America/Mendoza (65373)
- America/Menominee (65372)
- America/Merida (65371)
- America/Metlakatla (65370)
- America/Mexico_City (65369)
- America/Miquelon (65368)
- America/Moncton (65367)
- America/Monterrey (65366)
- America/Montevideo (65365)
- America/Montreal (65364)
- America/Montserrat (65363)
- America/Nassau (65362)
- America/New_York (65361)
- America/Nipigon (65360)
- America/Nome (65359)
- America/Noronha (65358)
- America/North_Dakota/Beulah (65357)
- America/North_Dakota/Center (65356)
- America/North_Dakota/New_Salem (65355)
- America/Ojinaga (65354)
- America/Panama (65353)
- America/Pangnirtung (65352)
- America/Paramaribo (65351)
- America/Phoenix (65350)
- America/Port-au-Prince (65349)
- America/Port_of_Spain (65348)
- America/Porto_Acre (65347)
- America/Porto_Velho (65346)
- America/Puerto_Rico (65345)
- America/Punta_Arenas (65344)
- America/Rainy_River (65343)
- America/Rankin_Inlet (65342)
- America/Recife (65341)
- America/Regina (65340)
- America/Resolute (65339)
- America/Rio_Branco (65338)
- America/Rosario (65337)
- America/Santa_Isabel (65336)
- America/Santarem (65335)
- America/Santiago (65334)
- America/Santo_Domingo (65333)
- America/Sao_Paulo (65332)
- America/Scoresbysund (65331)
- America/Shiprock (65330)
- America/Sitka (65329)
- America/St_Barthelemy (65328)
- America/St_Johns (65327)
- America/St_Kitts (65326)
- America/St_Lucia (65325)
- America/St_Thomas (65324)
- America/St_Vincent (65323)
- America/Swift_Current (65322)
- America/Tegucigalpa (65321)
- America/Thule (65320)
- America/Thunder_Bay (65319)
- America/Tijuana (65318)
- America/Toronto (65317)
- America/Tortola (65316)
- America/Vancouver (65315)
- America/Virgin (65314)
- America/Whitehorse (65313)
- America/Winnipeg (65312)
- America/Yakutat (65311)
- America/Yellowknife (65310)
- Antarctica/Casey (65309)
- Antarctica/Davis (65308)
- Antarctica/DumontDUrville (65307)
- Antarctica/Macquarie (65306)
- Antarctica/Mawson (65305)
- Antarctica/McMurdo (65304)
- Antarctica/Palmer (65303)
- Antarctica/Rothera (65302)
- Antarctica/South_Pole (65301)
- Antarctica/Syowa (65300)
- Antarctica/Troll (65299)
- Antarctica/Vostok (65298)
- Arctic/Longyearbyen (65297)
- Asia/Aden (65296)
- Asia/Almaty (65295)
- Asia/Amman (65294)
- Asia/Anadyr (65293)
- Asia/Aqtau (65292)
- Asia/Aqtobe (65291)
- Asia/Ashgabat (65290)
- Asia/Ashkhabad (65289)
- Asia/Atyrau (65288)
- Asia/Baghdad (65287)
- Asia/Bahrain (65286)
- Asia/Baku (65285)
- Asia/Bangkok (65284)
- Asia/Barnaul (65283)
- Asia/Beirut (65282)
- Asia/Bishkek (65281)
- Asia/Brunei (65280)
- Asia/Calcutta (65279)
- Asia/Chita (65278)
- Asia/Choibalsan (65277)
- Asia/Chongqing (65276)
- Asia/Chungking (65275)
- Asia/Colombo (65274)
- Asia/Dacca (65273)
- Asia/Damascus (65272)
- Asia/Dhaka (65271)
- Asia/Dili (65270)
- Asia/Dubai (65269)
- Asia/Dushanbe (65268)
- Asia/Famagusta (65267)
- Asia/Gaza (65266)
- Asia/Harbin (65265)
- Asia/Hebron (65264)
- Asia/Ho_Chi_Minh (65263)
- Asia/Hong_Kong (65262)
- Asia/Hovd (65261)
- Asia/Irkutsk (65260)
- Asia/Istanbul (65259)
- Asia/Jakarta (65258)
- Asia/Jayapura (65257)
- Asia/Jerusalem (65256)
- Asia/Kabul (65255)
- Asia/Kamchatka (65254)
- Asia/Karachi (65253)
- Asia/Kashgar (65252)
- Asia/Kathmandu (65251)
- Asia/Katmandu (65250)
- Asia/Khandyga (65249)
- Asia/Kolkata (65248)
- Asia/Krasnoyarsk (65247)
- Asia/Kuala_Lumpur (65246)
- Asia/Kuching (65245)
- Asia/Kuwait (65244)
- Asia/Macao (65243)
- Asia/Macau (65242)
- Asia/Magadan (65241)
- Asia/Makassar (65240)
- Asia/Manila (65239)
- Asia/Muscat (65238)
- Asia/Nicosia (65237)
- Asia/Novokuznetsk (65236)
- Asia/Novosibirsk (65235)
- Asia/Omsk (65234)
- Asia/Oral (65233)
- Asia/Phnom_Penh (65232)
- Asia/Pontianak (65231)
- Asia/Pyongyang (65230)
- Asia/Qatar (65229)
- Asia/Qyzylorda (65228)
- Asia/Rangoon (65227)
- Asia/Riyadh (65226)
- Asia/Saigon (65225)
- Asia/Sakhalin (65224)
- Asia/Samarkand (65223)
- Asia/Seoul (65222)
- Asia/Shanghai (65221)
- Asia/Singapore (65220)
- Asia/Srednekolymsk (65219)
- Asia/Taipei (65218)
- Asia/Tashkent (65217)
- Asia/Tbilisi (65216)
- Asia/Tehran (65215)
- Asia/Tel_Aviv (65214)
- Asia/Thimbu (65213)
- Asia/Thimphu (65212)
- Asia/Tokyo (65211)
- Asia/Tomsk (65210)
- Asia/Ujung_Pandang (65209)
- Asia/Ulaanbaatar (65208)
- Asia/Ulan_Bator (65207)
- Asia/Urumqi (65206)
- Asia/Ust-Nera (65205)
- Asia/Vientiane (65204)
- Asia/Vladivostok (65203)
- Asia/Yakutsk (65202)
- Asia/Yangon (65201)
- Asia/Yekaterinburg (65200)
- Asia/Yerevan (65199)
- Atlantic/Azores (65198)
- Atlantic/Bermuda (65197)
- Atlantic/Canary (65196)
- Atlantic/Cape_Verde (65195)
- Atlantic/Faeroe (65194)
- Atlantic/Faroe (65193)
- Atlantic/Jan_Mayen (65192)
- Atlantic/Madeira (65191)
- Atlantic/Reykjavik (65190)
- Atlantic/South_Georgia (65189)
- Atlantic/St_Helena (65188)
- Atlantic/Stanley (65187)
- Australia/ACT (65186)
- Australia/Adelaide (65185)
- Australia/Brisbane (65184)
- Australia/Broken_Hill (65183)
- Australia/Canberra (65182)
- Australia/Currie (65181)
- Australia/Darwin (65180)
- Australia/Eucla (65179)
- Australia/Hobart (65178)
- Australia/LHI (65177)
- Australia/Lindeman (65176)
- Australia/Lord_Howe (65175)
- Australia/Melbourne (65174)
- Australia/NSW (65173)
- Australia/North (65172)
- Australia/Perth (65171)
- Australia/Queensland (65170)
- Australia/South (65169)
- Australia/Sydney (65168)
- Australia/Tasmania (65167)
- Australia/Victoria (65166)
- Australia/West (65165)
- Australia/Yancowinna (65164)
- BET (65163)
- BST (65162)
- Brazil/Acre (65161)
- Brazil/DeNoronha (65160)
- Brazil/East (65159)
- Brazil/West (65158)
- CAT (65157)
- CET (65156)
- CNT (65155)
- CST (65154)
- CST6CDT (65153)
- CTT (65152)
- Canada/Atlantic (65151)
- Canada/Central (65150)
- Canada/East-Saskatchewan (65149)
- Canada/Eastern (65148)
- Canada/Mountain (65147)
- Canada/Newfoundland (65146)
- Canada/Pacific (65145)
- Canada/Saskatchewan (65144)
- Canada/Yukon (65143)
- Chile/Continental (65142)
- Chile/EasterIsland (65141)
- Cuba (65140)
- EAT (65139)
- ECT (65138)
- EET (65137)
- EST (65136)
- EST5EDT (65135)
- Egypt (65134)
- Eire (65133)
- Etc/GMT (65132)
- Etc/GMT+0 (65131)
- Etc/GMT+1 (65130)
- Etc/GMT+10 (65129)
- Etc/GMT+11 (65128)
- Etc/GMT+12 (65127)
- Etc/GMT+2 (65126)
- Etc/GMT+3 (65125)
- Etc/GMT+4 (65124)
- Etc/GMT+5 (65123)
- Etc/GMT+6 (65122)
- Etc/GMT+7 (65121)
- Etc/GMT+8 (65120)
- Etc/GMT+9 (65119)
- Etc/GMT-0 (65118)
- Etc/GMT-1 (65117)
- Etc/GMT-10 (65116)
- Etc/GMT-11 (65115)
- Etc/GMT-12 (65114)
- Etc/GMT-13 (65113)
- Etc/GMT-14 (65112)
- Etc/GMT-2 (65111)
- Etc/GMT-3 (65110)
- Etc/GMT-4 (65109)
- Etc/GMT-5 (65108)
- Etc/GMT-6 (65107)
- Etc/GMT-7 (65106)
- Etc/GMT-8 (65105)
- Etc/GMT-9 (65104)
- Etc/GMT0 (65103)
- Etc/Greenwich (65102)
- Etc/UCT (65101)
- Etc/UTC (65100)
- Etc/Universal (65099)
- Etc/Zulu (65098)
- Europe/Amsterdam (65097)
- Europe/Andorra (65096)
- Europe/Astrakhan (65095)
- Europe/Athens (65094)
- Europe/Belfast (65093)
- Europe/Belgrade (65092)
- Europe/Berlin (65091)
- Europe/Bratislava (65090)
- Europe/Brussels (65089)
- Europe/Bucharest (65088)
- Europe/Budapest (65087)
- Europe/Busingen (65086)
- Europe/Chisinau (65085)
- Europe/Copenhagen (65084)
- Europe/Dublin (65083)
- Europe/Gibraltar (65082)
- Europe/Guernsey (65081)
- Europe/Helsinki (65080)
- Europe/Isle_of_Man (65079)
- Europe/Istanbul (65078)
- Europe/Jersey (65077)
- Europe/Kaliningrad (65076)
- Europe/Kiev (65075)
- Europe/Kirov (65074)
- Europe/Lisbon (65073)
- Europe/Ljubljana (65072)
- Europe/London (65071)
- Europe/Luxembourg (65070)
- Europe/Madrid (65069)
- Europe/Malta (65068)
- Europe/Mariehamn (65067)
- Europe/Minsk (65066)
- Europe/Monaco (65065)
- Europe/Moscow (65064)
- Europe/Nicosia (65063)
- Europe/Oslo (65062)
- Europe/Paris (65061)
- Europe/Podgorica (65060)
- Europe/Prague (65059)
- Europe/Riga (65058)
- Europe/Rome (65057)
- Europe/Samara (65056)
- Europe/San_Marino (65055)
- Europe/Sarajevo (65054)
- Europe/Saratov (65053)
- Europe/Simferopol (65052)
- Europe/Skopje (65051)
- Europe/Sofia (65050)
- Europe/Stockholm (65049)
- Europe/Tallinn (65048)
- Europe/Tirane (65047)
- Europe/Tiraspol (65046)
- Europe/Ulyanovsk (65045)
- Europe/Uzhgorod (65044)
- Europe/Vaduz (65043)
- Europe/Vatican (65042)
- Europe/Vienna (65041)
- Europe/Vilnius (65040)
- Europe/Volgograd (65039)
- Europe/Warsaw (65038)
- Europe/Zagreb (65037)
- Europe/Zaporozhye (65036)
- Europe/Zurich (65035)
- Factory (65034)
- GB (65033)
- GB-Eire (65032)
- GMT+0 (65031)
- GMT-0 (65030)
- GMT0 (65029)
- Greenwich (65028)
- HST (65027)
- Hongkong (65026)
- IET (65025)
- IST (65024)
- Iceland (65023)
- Indian/Antananarivo (65022)
- Indian/Chagos (65021)
- Indian/Christmas (65020)
- Indian/Cocos (65019)
- Indian/Comoro (65018)
- Indian/Kerguelen (65017)
- Indian/Mahe (65016)
- Indian/Maldives (65015)
- Indian/Mauritius (65014)
- Indian/Mayotte (65013)
- Indian/Reunion (65012)
- Iran (65011)
- Israel (65010)
- JST (65009)
- Jamaica (65008)
- Japan (65007)
- Kwajalein (65006)
- Libya (65005)
- MET (65004)
- MIT (65003)
- MST (65002)
- MST7MDT (65001)
- Mexico/BajaNorte (65000)
- Mexico/BajaSur (64999)
- Mexico/General (64998)
- NET (64997)
- NST (64996)
- NZ (64995)
- NZ-CHAT (64994)
- Navajo (64993)
- PLT (64992)
- PNT (64991)
- PRC (64990)
- PRT (64989)
- PST (64988)
- PST8PDT (64987)
- Pacific/Apia (64986)
- Pacific/Auckland (64985)
- Pacific/Bougainville (64984)
- Pacific/Chatham (64983)
- Pacific/Chuuk (64982)
- Pacific/Easter (64981)
- Pacific/Efate (64980)
- Pacific/Enderbury (64979)
- Pacific/Fakaofo (64978)
- Pacific/Fiji (64977)
- Pacific/Funafuti (64976)
- Pacific/Galapagos (64975)
- Pacific/Gambier (64974)
- Pacific/Guadalcanal (64973)
- Pacific/Guam (64972)
- Pacific/Honolulu (64971)
- Pacific/Johnston (64970)
- Pacific/Kiritimati (64969)
- Pacific/Kosrae (64968)
- Pacific/Kwajalein (64967)
- Pacific/Majuro (64966)
- Pacific/Marquesas (64965)
- Pacific/Midway (64964)
- Pacific/Nauru (64963)
- Pacific/Niue (64962)
- Pacific/Norfolk (64961)
- Pacific/Noumea (64960)
- Pacific/Pago_Pago (64959)
- Pacific/Palau (64958)
- Pacific/Pitcairn (64957)
- Pacific/Pohnpei (64956)
- Pacific/Ponape (64955)
- Pacific/Port_Moresby (64954)
- Pacific/Rarotonga (64953)
- Pacific/Saipan (64952)
- Pacific/Samoa (64951)
- Pacific/Tahiti (64950)
- Pacific/Tarawa (64949)
- Pacific/Tongatapu (64948)
- Pacific/Truk (64947)
- Pacific/Wake (64946)
- Pacific/Wallis (64945)
- Pacific/Yap (64944)
- Poland (64943)
- Portugal (64942)
- ROC (64941)
- ROK (64940)
- SST (64939)
- Singapore (64938)
- SystemV/AST4 (64937)
- SystemV/AST4ADT (64936)
- SystemV/CST6 (64935)
- SystemV/CST6CDT (64934)
- SystemV/EST5 (64933)
- SystemV/EST5EDT (64932)
- SystemV/HST10 (64931)
- SystemV/MST7 (64930)
- SystemV/MST7MDT (64929)
- SystemV/PST8 (64928)
- SystemV/PST8PDT (64927)
- SystemV/YST9 (64926)
- SystemV/YST9YDT (64925)
- Turkey (64924)
- UCT (64923)
- US/Alaska (64922)
- US/Aleutian (64921)
- US/Arizona (64920)
- US/Central (64919)
- US/East-Indiana (64918)
- US/Eastern (64917)
- US/Hawaii (64916)
- US/Indiana-Starke (64915)
- US/Michigan (64914)
- US/Mountain (64913)
- US/Pacific (64912)
- US/Pacific-New (64911)
- US/Samoa (64910)
- UTC (64909)
- Universal (64908)
- VST (64907)
- W-SU (64906)
- WET (64905)
- Zulu (64904)
Author:
Adriano dos Santos Fernandes <adrianosf at gmail.com>
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