时区，时间戳，java时间
●时间戳(timestamp)定义
时间戳指的是从格林威治时间1970年01月01日00时00分00秒起至现在的总秒数。严格来说，不管你处在地球上的哪个地方，任意时间点的时间戳都是相同的。这点有利于线上和客户端分布式应用统一追踪时间信息。时间戳是没有时区概念的，同一个时间戳对不同时区显示的时间不一样而已。
最近在做一个api的自测时发现，在不同环境同一个api返回的response里的时间戳结果不太一样。查看了下编程逻辑，代码如下：
SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyy-MM-dd");
Date date = sDateFormat.parse(m.getDaytime());//格式类似"2020-02-20"
getEventNumDateResponse.setTime(date.getTime());
sDateFormat = null;这段代码逻辑上没什么问题，但在不同环境上运行结果不一样，问题出在哪了？
细想，怀疑Date与时区肯定有关系，经过检查，发现本地的时区是默认的东八区UTC+0800，本地java 程序运行也没配置时区，采用的自然是系统时区东八区，而在另外一个开发环境，jar包运行时配置了-Duser.timezone=UTC，虽然系统默认也是东八区，原来是这个设置导致的。
比如"2020-02-20"这个字符串时间，被SimpleDateFormat parse后，如果当前的运行时区（没设置则是系统时区）是UTC+0800，则时间Date是：Thu Feb 20 00:00:00 CST 2020
CST时区包含了UTC+8:00 也就是这个时间自然是东八区的 2020-02-20 00:00:00 这个时间，对应着是UTC 0时区的2020-02-19 16:00:00时间，通过getTime获取的时间戳是：
System.out.println(TimeZone.getDefault().getRawOffset());
28800000System.out.println(sdf.parse("2020-02-20").getTime());
1582128000000
通过在pg里转化验证：
SELECT TO_TIMESTAMP(1582128000)AT TIME ZONE 'UTC-0' ;
2020-02-19 16:00:00
SELECT TO_TIMESTAMP(1582128000)AT TIME ZONE 'Asia/Shanghai' ;
2020-02-20 00:00:00同样，当我们在系统里设置了时区为UTC 0时区，或者在jar运行时设置了-Duser.timezone=UTC，或者在代码里配置了
TimeZone.setDefault(TimeZone.getTimeZone("UTC"));这样，当后面SimpleDateFormat parse后， 则时间Date是：Thu Feb 20 00:00:00 UTC 2020，表明是UTC 0时区的 2020-02-20 00:00:00 这个时间，对应着是UTC+8时区的
2020-02-20 08:00:00时间，通过getTime获取的时间戳是：System.out.println(TimeZone.getDefault().getRawOffset());
0System.out.println(sdf.parse("2020-02-20").getTime());
1582156800000
通过在pg里转化验证：
SELECT TO_TIMESTAMP(1582156800)AT TIME ZONE 'UTC-0' ;
2020-02-20 00:00:00
----直接写时区偏移(基于格林威治时区，是反的，即提前-滞后+，例如正常东八区，需要写-8:00，因此建议直接用时区缩写，见后面附表，当然也可以写---Asia/Shanghai表示东八区SELECT TO_TIMESTAMP(1582156800)AT TIME ZONE 'Asia/Shanghai' ;
2020-02-20 08:00:00写到这里，相信大家都明白了为啥同一个程序在不同机器上跑出的涉及时间戳的结果不一致，这一点要注意额，千万别掉坑里。
最后，说一下涉及时间戳时，配置时区的几种方式：
Linux中：（以redhat 7.0为例）
查看：
[root@localhost Desktop]# timedatectl status
Local time: Thu 2020-02-27 14:57:58 CST
Universal time: Thu 2020-02-27 06:57:58 UTC
RTC time: Thu 2020-02-27 06:58:00
Time zone: Asia/Shanghai (CST, +0800)
NTP enabled: yes
NTP synchronized: no
RTC in local TZ: no
DST active: n/a
或者：[root@localhost Desktop]# date -R
Thu, 27 Feb 2020 15:00:25 +0800
设置：
# timedatectl set-timezone "Asia/Shanghai"
在Java中也可以设置时区
1）启动设置
java -Duser.timezone=Asia/Shanghai -jar xxx.jar
2) 代码中设置
TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println(sdf.parse("2018-09-01 08:00:00").getTime());3) 单次处理生效，建议使用joda的时间包
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.9.9</version>
</dependency>
DateTimeFormatter dateTimeFormatter = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss").withChronology(ISOChronology.getInstance(DateTimeZone.forID("Asia/Shanghai")));
System.out.println(dateTimeFormatter.parseDateTime("2018-09-01 08:00:00").getMillis());另外，了解Java8 的朋友可能都知道，Java8提供了一套新的时间处理API，这套API比以前的时间处理API要友好的多。
Java8 中加入了对时区的支持，带时区的时间为分别为：ZonedDate、ZonedTime、ZonedDateTime。其中每个时区都对应着 ID，地区ID都为 “{区域}/{城市}”的格式，如Asia/Shanghai、America/Los_Angeles等。
Java中的Date类中是不包含时区信息的，在使用System.out.println打印Date的时候，回调用Date.toString方法，该方法会获取系统的默认时区来转换时间。
在Java8中可以使用ZonedTime、ZonedDate和ZonedDateTime来表示带有时区信息的时间。
LocalDateTime now = LocalDateTime.now(ZoneId.of("America/Los_Angeles"));
System.out.println(now);
//获取秒数
Long second = LocalDateTime.now().toEpochSecond(ZoneOffset.of("+8"));
//获取毫秒数
Long milliSecond = LocalDateTime.now().toInstant(ZoneOffset.of("+8")).toEpochMilli();//时间转字符串格式化
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMddHHmmssSSS");
String dateTime = LocalDateTime.now(ZoneOffset.of("+8")).format(formatter);
//字符串转时间
String dateTimeStr = "2018-07-28 14:11:15";
DateTimeFormatter df = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
LocalDateTime localDateTime = LocalDateTime.now();
Date date = Date.from(localDateTime.atZone(ZoneOffset.ofHours(8)).toInstant());
附几种时区标准：
1.UTC
UTC＋时区差＝本地时间
时区差东为正，西为负
UTC是协调世界时(Universal Time Coordinated)英文缩写，是由国际无线电咨询委员会规定和推荐,并由国际时间局(BIH)负责保持的以秒为基础的时间标度。UTC相当于本初子午线(即经度0度)上的平均太阳时，过去曾用格林威治平均时(GMT)来表示.北京时间比UTC时间早8小时，以1999年1月1日0000UTC为例，UTC时间是零点，北京时间为1999年1月1日早上8点整。
2.GMT(Greenwich Mean Time)是格林尼治平时：
由于地球轨道并非圆形，其运行速度又随着地球与太阳的距离改变而出现变化，因此视太阳时欠缺均匀性。视太阳日的长度同时亦受到地球自转轴相对轨道面的倾斜度所影响。为着要纠正上述的不均匀性，天文学家计算地球非圆形轨迹与极轴倾斜对视太阳时的效应。平太阳时就是指经修订后的视太阳时。在格林尼治子午线上的平太阳时称为世界时(UT0)，又叫格林尼治平时(GMT)。 为了确保协调世界时与世界时(UT1)相差不会超过0.9秒，有需要时便会在协调世界时内加上正或负闰秒。因此协调世界时与国际原子时(TAI)之间会出现若干整数秒的差别。位于巴黎的国际地球自转事务中央局(IERS)负责决定何时加入闰秒。
也就是说，UTC 基本上等于GMT
3.CET
（英語：Central European Time，CET）欧洲中部时间是比世界标准时间（UTC）早一个小时的时区名称之一。它被大部分欧洲国家和部分北非国家采用。冬季时间为UTC+1，夏季欧洲夏令时为UTC+2。
4.CEST
欧洲中部夏令时间（Central European Summer Time，简称CEST）比世界标准时间（UTC）早两个小时的时区名称之一。它被大部分欧洲国家和部分北非国家在夏天采用(UTC+2)，冬季这些国家使用欧洲中部时间（UTC+1）
附JAVA TIMEZONE 时区表：
Etc/GMT+12
Etc/GMT+11
MIT
Pacific/Apia
Pacific/Midway
Pacific/Niue
Pacific/Pago_Pago
Pacific/Samoa
US/Samoa
America/Adak
America/Atka
Etc/GMT+10
HST
Pacific/Fakaofo
Pacific/Honolulu
Pacific/Johnston
Pacific/Rarotonga
Pacific/Tahiti
SystemV/HST10
US/Aleutian
US/Hawaii
Pacific/Marquesas
AST
America/Anchorage
America/Juneau
America/Nome
America/Yakutat
Etc/GMT+9
Pacific/Gambier
SystemV/YST9
SystemV/YST9YDT
US/Alaska
America/Dawson
America/Ensenada
America/Los_Angeles
America/Tijuana
America/Vancouver
America/Whitehorse
Canada/Pacific
Canada/Yukon
Etc/GMT+8
Mexico/BajaNorte
PST
PST8PDT
Pacific/Pitcairn
SystemV/PST8
SystemV/PST8PDT
US/Pacific
US/Pacific-New
America/Boise
America/Cambridge_Bay
America/Chihuahua
America/Dawson_Creek
America/Denver
America/Edmonton
America/Hermosillo
America/Inuvik
America/Mazatlan
America/Phoenix
America/Shiprock
America/Yellowknife
Canada/Mountain
Etc/GMT+7
MST
MST7MDT
Mexico/BajaSur
Navajo
PNT
SystemV/MST7
SystemV/MST7MDT
US/Arizona
US/Mountain
America/Belize
America/Cancun
America/Chicago
America/Costa_Rica
America/El_Salvador
America/Guatemala
America/Indiana/Knox
America/Indiana/Tell_City
America/Knox_IN
America/Managua
America/Menominee
America/Merida
America/Mexico_City
America/Monterrey
America/North_Dakota/Center
America/North_Dakota/New_Salem
America/Rainy_River
America/Rankin_Inlet
America/Regina
America/Swift_Current
America/Tegucigalpa
America/Winnipeg
CST
CST6CDT
Canada/Central
Canada/East-Saskatchewan
Canada/Saskatchewan
Chile/EasterIsland
Etc/GMT+6
Mexico/General
Pacific/Easter
Pacific/Galapagos
SystemV/CST6
SystemV/CST6CDT
US/Central
US/Indiana-Starke
America/Atikokan
America/Bogota
America/Cayman
America/Coral_Harbour
America/Detroit
America/Eirunepe
America/Fort_Wayne
America/Grand_Turk
America/Guayaquil
America/Havana
America/Indiana/Indianapolis
America/Indiana/Marengo
America/Indiana/Petersburg
America/Indiana/Vevay
America/Indiana/Vincennes
America/Indiana/Winamac
America/Indianapolis
America/Iqaluit
America/Jamaica
America/Kentucky/Louisville
America/Kentucky/Monticello
America/Lima
America/Louisville
America/Montreal
America/Nassau
America/New_York
America/Nipigon
America/Panama
America/Pangnirtung
America/Port-au-Prince
America/Porto_Acre
America/Resolute
America/Rio_Branco
America/Thunder_Bay
America/Toronto
Brazil/Acre
Canada/Eastern
Cuba
EST
EST5EDT
Etc/GMT+5
IET
Jamaica
SystemV/EST5
SystemV/EST5EDT
US/East-Indiana
US/Eastern
US/Michigan
America/Caracas
America/Anguilla
America/Antigua
America/Aruba
America/Asuncion
America/Barbados
America/Blanc-Sablon
America/Boa_Vista
America/Campo_Grande
America/Cuiaba
America/Curacao
America/Dominica
America/Glace_Bay
America/Goose_Bay
America/Grenada
America/Guadeloupe
America/Guyana
America/Halifax
America/La_Paz
America/Manaus
America/Marigot
America/Martinique
America/Moncton
America/Montserrat
America/Port_of_Spain
America/Porto_Velho
America/Puerto_Rico
America/Santiago
America/Santo_Domingo
America/St_Barthelemy
America/St_Kitts
America/St_Lucia
America/St_Thomas
America/St_Vincent
America/Thule
America/Tortola
America/Virgin
Antarctica/Palmer
Atlantic/Bermuda
Atlantic/Stanley
Brazil/West
Canada/Atlantic
Chile/Continental
Etc/GMT+4
PRT
SystemV/AST4
SystemV/AST4ADT
America/St_Johns
CNT
Canada/Newfoundland
AGT
America/Araguaina
America/Argentina/Buenos_Aires
America/Argentina/Catamarca
America/Argentina/ComodRivadavia
America/Argentina/Cordoba
America/Argentina/Jujuy
America/Argentina/La_Rioja
America/Argentina/Mendoza
America/Argentina/Rio_Gallegos
America/Argentina/San_Juan
America/Argentina/San_Luis
America/Argentina/Tucuman
America/Argentina/Ushuaia
America/Bahia
America/Belem
America/Buenos_Aires
America/Catamarca
America/Cayenne
America/Cordoba
America/Fortaleza
America/Godthab
America/Jujuy
America/Maceio
America/Mendoza
America/Miquelon
America/Montevideo
America/Paramaribo
America/Recife
America/Rosario
America/Sao_Paulo
Antarctica/Rothera
BET
Brazil/East
Etc/GMT+3
America/Noronha
Atlantic/South_Georgia
Brazil/DeNoronha
Etc/GMT+2
America/Scoresbysund
Atlantic/Azores
Atlantic/Cape_Verde
Etc/GMT+1
Africa/Abidjan
Africa/Accra
Africa/Bamako
Africa/Banjul
Africa/Bissau
Africa/Casablanca
Africa/Conakry
Africa/Dakar
Africa/El_Aaiun
Africa/Freetown
Africa/Lome
Africa/Monrovia
Africa/Nouakchott
Africa/Ouagadougou
Africa/Sao_Tome
Africa/Timbuktu
America/Danmarkshavn
Atlantic/Canary
Atlantic/Faeroe
Atlantic/Faroe
Atlantic/Madeira
Atlantic/Reykjavik
Atlantic/St_Helena
Eire
Etc/GMT
Etc/GMT+0
Etc/GMT-0
Etc/GMT0
Etc/Greenwich
Etc/UCT
Etc/UTC
Etc/Universal
Etc/Zulu
Europe/Belfast
Europe/Dublin
Europe/Guernsey
Europe/Isle_of_Man
Europe/Jersey
Europe/Lisbon
Europe/London
GB
GB-Eire
GMT
GMT0
Greenwich
Iceland
Portugal
UCT
UTC
Universal
WET
Zulu
Africa/Algiers
Africa/Bangui
Africa/Brazzaville
Africa/Ceuta
Africa/Douala
Africa/Kinshasa
Africa/Lagos
Africa/Libreville
Africa/Luanda
Africa/Malabo
Africa/Ndjamena
Africa/Niamey
Africa/Porto-Novo
Africa/Tunis
Africa/Windhoek
Arctic/Longyearbyen
Atlantic/Jan_Mayen
CET
ECT
Etc/GMT-1
Europe/Amsterdam
Europe/Andorra
Europe/Belgrade
Europe/Berlin
Europe/Bratislava
Europe/Brussels
Europe/Budapest
Europe/Copenhagen
Europe/Gibraltar
Europe/Ljubljana
Europe/Luxembourg
Europe/Madrid
Europe/Malta
Europe/Monaco
Europe/Oslo
Europe/Paris
Europe/Podgorica
Europe/Prague
Europe/Rome
Europe/San_Marino
Europe/Sarajevo
Europe/Skopje
Europe/Stockholm
Europe/Tirane
Europe/Vaduz
Europe/Vatican
Europe/Vienna
Europe/Warsaw
Europe/Zagreb
Europe/Zurich
MET
Poland
ART
Africa/Blantyre
Africa/Bujumbura
Africa/Cairo
Africa/Gaborone
Africa/Harare
Africa/Johannesburg
Africa/Kigali
Africa/Lubumbashi
Africa/Lusaka
Africa/Maputo
Africa/Maseru
Africa/Mbabane
Africa/Tripoli
Asia/Amman
Asia/Beirut
Asia/Damascus
Asia/Gaza
Asia/Istanbul
Asia/Jerusalem
Asia/Nicosia
Asia/Tel_Aviv
CAT
EET
Egypt
Etc/GMT-2
Europe/Athens
Europe/Bucharest
Europe/Chisinau
Europe/Helsinki
Europe/Istanbul
Europe/Kaliningrad
Europe/Kiev
Europe/Mariehamn
Europe/Minsk
Europe/Nicosia
Europe/Riga
Europe/Simferopol
Europe/Sofia
Europe/Tallinn
Europe/Tiraspol
Europe/Uzhgorod
Europe/Vilnius
Europe/Zaporozhye
Israel
Libya
Turkey
Africa/Addis_Ababa
Africa/Asmara
Africa/Asmera
Africa/Dar_es_Salaam
Africa/Djibouti
Africa/Kampala
Africa/Khartoum
Africa/Mogadishu
Africa/Nairobi
Antarctica/Syowa
Asia/Aden
Asia/Baghdad
Asia/Bahrain
Asia/Kuwait
Asia/Qatar
Asia/Riyadh
EAT
Etc/GMT-3
Europe/Moscow
Europe/Volgograd
Indian/Antananarivo
Indian/Comoro
Indian/Mayotte
W-SU
Asia/Riyadh87
Asia/Riyadh88
Asia/Riyadh89
Mideast/Riyadh87
Mideast/Riyadh88
Mideast/Riyadh89
Asia/Tehran
Iran
Asia/Baku
Asia/Dubai
Asia/Muscat
Asia/Tbilisi
Asia/Yerevan
Etc/GMT-4
Europe/Samara
Indian/Mahe
Indian/Mauritius
Indian/Reunion
NET
Asia/Kabul
Asia/Aqtau
Asia/Aqtobe
Asia/Ashgabat
Asia/Ashkhabad
Asia/Dushanbe
Asia/Karachi
Asia/Oral
Asia/Samarkand
Asia/Tashkent
Asia/Yekaterinburg
Etc/GMT-5
Indian/Kerguelen
Indian/Maldives
PLT
Asia/Calcutta
Asia/Colombo
Asia/Kolkata
IST
Asia/Katmandu
Antarctica/Mawson
Antarctica/Vostok
Asia/Almaty
Asia/Bishkek
Asia/Dacca
Asia/Dhaka
Asia/Novosibirsk
Asia/Omsk
Asia/Qyzylorda
Asia/Thimbu
Asia/Thimphu
BST
Etc/GMT-6
Indian/Chagos
Asia/Rangoon
Indian/Cocos
Antarctica/Davis
Asia/Bangkok
Asia/Ho_Chi_Minh
Asia/Hovd
Asia/Jakarta
Asia/Krasnoyarsk
Asia/Phnom_Penh
Asia/Pontianak
Asia/Saigon
Asia/Vientiane
Etc/GMT-7
Indian/Christmas
VST
Antarctica/Casey
Asia/Brunei
Asia/Choibalsan
Asia/Chongqing
Asia/Chungking
Asia/Harbin
Asia/Hong_Kong
Asia/Irkutsk
Asia/Kashgar
Asia/Kuala_Lumpur
Asia/Kuching
Asia/Macao
Asia/Macau
Asia/Makassar
Asia/Manila
Asia/Shanghai
Asia/Singapore
Asia/Taipei
Asia/Ujung_Pandang
Asia/Ulaanbaatar
Asia/Ulan_Bator
Asia/Urumqi
Australia/Perth
Australia/West
CTT
Etc/GMT-8
Hongkong
PRC
Singapore
Australia/Eucla
Asia/Dili
Asia/Jayapura
Asia/Pyongyang
Asia/Seoul
Asia/Tokyo
Asia/Yakutsk
Etc/GMT-9
JST
Japan
Pacific/Palau
ROK
ACT
Australia/Adelaide
Australia/Broken_Hill
Australia/Darwin
Australia/North
Australia/South
Australia/Yancowinna
AET
Antarctica/DumontDUrville
Asia/Sakhalin
Asia/Vladivostok
Australia/ACT
Australia/Brisbane
Australia/Canberra
Australia/Currie
Australia/Hobart
Australia/Lindeman
Australia/Melbourne
Australia/NSW
Australia/Queensland
Australia/Sydney
Australia/Tasmania
Australia/Victoria
Etc/GMT-10
Pacific/Guam
Pacific/Port_Moresby
Pacific/Saipan
Pacific/Truk
Pacific/Yap
Australia/LHI
Australia/Lord_Howe
Asia/Magadan
Etc/GMT-11
Pacific/Efate
Pacific/Guadalcanal
Pacific/Kosrae
Pacific/Noumea
Pacific/Ponape
SST
Pacific/Norfolk
Antarctica/McMurdo
Antarctica/South_Pole
Asia/Anadyr
Asia/Kamchatka
Etc/GMT-12
Kwajalein
NST
NZ
Pacific/Auckland
Pacific/Fiji
Pacific/Funafuti
Pacific/Kwajalein
Pacific/Majuro
Pacific/Nauru
Pacific/Tarawa
Pacific/Wake
Pacific/Wallis
NZ-CHAT
Pacific/Chatham
Etc/GMT-13
Pacific/Enderbury
Pacific/Tongatapu
Etc/GMT-14
Pacific/Kiritimati
附： PostgreSQL Time Zone Names
Names | Offset | Description |
FJST | -13:00 | Fiji Summer Time |
FJT | -12:00 | Fiji Time |
IDLW | -12:00 | International Date Line, West |
BST | -11:00 | Bering Summer Time |
NT | -11:00 | Nome Time |
NUT | -11:00 | Niue Time |
AHST | -10:00 | Alaska-Hawaii Std Time |
CAT | -10:00 | Central Alaska Time |
HST | -10:00 | Hawaii Std Time |
THAT | -10:00 | Tahiti Time |
TKT | -10:00 | Tokelau Time |
MART | -09:30 | Marquesas Time |
AKST | -09:00 | Alaska Standard Time |
GAMT | -09:00 | Gambier Time |
HDT | -09:00 | Hawaii/Alaska Daylight Time |
YST | -09:00 | Yukon Standard Time |
AKDT | -08:00 | Alaska Daylight Time |
PST | -08:00 | Pacific Standard Time |
YDT | -08:00 | Yukon Daylight Time |
MST | -07:00 | Mountain Standard Time |
PDT | -07:00 | Pacific Daylight Time |
CST | -06:00 | Central Standard Time |
EAST | -06:00 | Easter Island Time |
GALT | -06:00 | Galapagos Time |
MDT | -06:00 | Mountain Daylight Time |
ZP6 | -06:00 | UTC +6 hours |
ACT | -05:00 | Atlantic/Porto Acre Time |
CDT | -05:00 | Central Daylight Time |
COT | -05:00 | Columbia Time |
EASST | -05:00 | Easter Island Summer Time |
ECT | -05:00 | Ecuador Time |
EST | -05:00 | Eastern Standard Time |
PET | -05:00 | Peru Time |
ZP5 | -05:00 | UTC +5 hours |
ACST | -04:00 | Atlantic/Porto Acre Summer Time |
AMT | -04:00 | Amazon Time (Porto Velho) |
AST | -04:00 | Atlantic Std Time (Canada) |
BOT | -04:00 | Bolivia Time |
CLT | -04:00 | Chile Time |
ECT | -04:00 | Eastern Caribbean Time |
EDT | -04:00 | Eastern Daylight Time |
GYT | -04:00 | Guyana Time |
PYT | -04:00 | Paraguay Time |
VET | -04:00 | Venezuela Time |
ZP4 | -04:00 | UTC +4 hours |
NFT | -03:30 | Newfoundland Standard Time |
NST | -03:30 | Newfoundland Standard Time |
ADT | -03:00 | Atlantic Daylight Time |
AMST | -03:00 | Amazon Summer Time (Porto Velho) |
ART | -03:00 | Argentina Time |
AWT | -03:00 | Brazil Time |
BRT | -03:00 | Brasilia Time |
BST | -03:00 | Brazil Standard Time |
CLST | -03:00 | Chile Summer Time |
FKST | -03:00 | Falkland Islands Summer Time |
GFT | -03:00 | French Guiana Time |
PYST | -03:00 | Paraguay Summer Time |
UYT | -03:00 | Uruguay Time |
WGT | -03:00 | West Greenland Time |
NDT | -02:30 | Newfoundland Daylight Time |
BRST | -02:00 | Brasilia Summer Time |
FKT | -02:00 | Falkland Islands Time |
FNT | -02:00 | Fernando de Noronha Time |
PMDT | -02:00 | Pierre & Miquelon Daylight Time |
UYST | -02:00 | Uruguay Summer Time |
WGST | -02:00 | West Greenland Summer Time |
AZOT | -01:00 | Azores Time |
EGT | -01:00 | East Greenland Time |
FNST | -01:00 | Fernando de Noronha Summer Time |
SET | -01:00 | Seychelles Time |
WAT | -01:00 | West Africa Time |
AZOST | +00:00 | Azores Summer Time |
EGST | +00:00 | East Greenland Summer Time |
GMT | +00:00 | Greenwich Mean Time |
UTC | +00:00 | Universal Coordinated Time |
UT | +00:00 | Universal Time |
WET | +00:00 | Western Europe |
ZULU | +00:00 | Universal Time |
Z | +00:00 | ISO-8601 Universal Time |
BST | +01:00 | British Summer Time |
CET | +01:00 | Central European Time |
DNT | +01:00 | Dansk Normal Time |
FST | +01:00 | French Summer Time |
MET | +01:00 | Middle Europe Time |
MEWT | +01:00 | Middle Europe Winter Time |
MEZ | +01:00 | Middle Europe Zone |
NOR | +01:00 | Norway Standard Time |
SWT | +01:00 | Swedish Winter Time |
WEST | +01:00 | Western Europe Summer Time |
WEtdST | +01:00 | Western Europe Daylight Savings Time |
BDST | +02:00 | British Double Summer Time |
CEST | +02:00 | Central European Dayl.Time |
CETDST | +02:00 | Central European Dayl.Time |
EET | +02:00 | Eastern Europe, USSR Zone 1 |
FWT | +02:00 | French Winter Time |
IST | +02:00 | Israel Time |
MEST | +02:00 | Middle Europe Summer Time |
MEtdST | +02:00 | Middle Europe Daylight Time |
SST | +02:00 | Swedish Summer Time |
BT | +03:00 | Baghdad Time |
EAT | +03:00 | East Africa Time |
EAT | +03:00 | Indian Antananarivo Time |
EEST | +03:00 | Eastern Europe Summer Time |
EEtdST | +03:00 | Eastern Europe Daylight Time |
HMT | +03:00 | Hellas Mediterranean Time |
MSK | +03:00 | Moscow Time |
IRT | +03:30 | Iran Time |
IT | +03:30 | Iran Time |
AMT | +04:00 | Armenia Time (Yerevan) |
AZT | +04:00 | Azerbaijan Time |
EAST | +04:00 | Indian Antananarivo Savings Time |
GET | +04:00 | Georgia Time |
MSD | +04:00 | Moscow Summer Time |
MUT | +04:00 | Mauritius Island Time |
RET | +04:00 | Reunion Island Time |
SCT | +04:00 | Mahe Island Time |
AFT | +04:30 | Kabul Time |
AMST | +05:00 | Armenia Summer Time (Yerevan) |
AZST | +05:00 | Azerbaijan Summer Time |
GEST | +05:00 | Georgia Summer Time |
IOT | +05:00 | Indian Chagos Time |
KGT | +05:00 | Kyrgyzstan Time |
MVT | +05:00 | Maldives Island Time |
PKT | +05:00 | Pakistan Time |
TFT | +05:00 | Kerguelen Time |
TJT | +05:00 | Tajikistan Time |
TMT | +05:00 | Turkmenistan Time |
UZT | +05:00 | Uzbekistan Time |
YEKT | +05:00 | Yekaterinburg Time |
NPT | +05:45 | Nepal Standard Time |
ALMT | +06:00 | Almaty Time |
BDT | +06:00 | Dacca Time |
BTT | +06:00 | Bhutan Time |
DUSST | +06:00 | Dushanbe Summer Time |
KGST | +06:00 | Kyrgyzstan Summer Time |
LKT | +06:00 | Lanka Time |
MAWT | +06:00 | Mawson, Antarctica |
NOVT | +06:00 | Novosibirsk Standard Time |
OMST | +06:00 | Omsk Time |
UZST | +06:00 | Uzbekistan Summer Time |
YEKST | +06:00 | Yekaterinburg Summer Time |
CCT | +06:30 | Indian Cocos (Island) Time |
MMT | +06:30 | Myanmar Time |
ALMST | +07:00 | Almaty Savings Time |
CVT | +07:00 | Christmas Island Time (Indian Ocean) |
CXT | +07:00 | Christmas Island Time (Indian Ocean) |
DAVT | +07:00 | Davis Time (Antarctica) |
ICT | +07:00 | Indochina Time |
JAVT | +07:00 | Java Time |
KRAST | +07:00 | Krasnoyarsk Summer Time |
NOVST | +07:00 | Novosibirsk Summer Time |
OMSST | +07:00 | Omsk Summer Time |
WAST | +07:00 | West Australian Std Time |
JT | +07:30 | Java Time |
AWST | +08:00 | Western Australia |
BNT | +08:00 | Brunei Darussalam Time |
BORT | +08:00 | Borneo Time (Indonesia) |
CCT | +08:00 | China Coast Time |
HKT | +08:00 | Hong Kong Time |
IRKT | +08:00 | Irkutsk Time |
KRAT | +08:00 | Krasnoyarsk Standard Time |
MYT | +08:00 | Malaysia Time |
PHT | +08:00 | Phillipine Time |
ULAT | +08:00 | Ulan Bator Time |
WADT | +08:00 | West Australian DST |
WST | +08:00 | West Australian Standard Time |
MT | +08:30 | Moluccas Time |
AWSST | +09:00 | Western Australia Time |
IRKST | +09:00 | Irkutsk Summer Time |
JAYT | +09:00 | Jayapura Time (Indonesia) |
JST | +09:00 | Japan Std Time, USSR Zone 8 |
KST | +09:00 | Korea Standard Time |
PWT | +09:00 | Palau Time |
ULAST | +09:00 | Ulan Bator Summer Time |
WDT | +09:00 | West Australian DST |
YAKT | +09:00 | Yakutsk Time |
ACST | +09:30 | Central Australia |
CAST | +09:30 | Central Australian ST |
SAST | +09:30 | South Australian Std Time |
SAT | +09:30 | South Australian Std Time |
AEST | +10:00 | Australia Eastern Std Time |
DDUT | +10:00 | Dumont-d'Urville Time (Antarctica) |
EAST | +10:00 | East Australian Std Time |
EST | +10:00 | Australia Eastern Std Time |
GST | +10:00 | Guam Std Time, USSR Zone 9 |
KDT | +10:00 | Korea Daylight Time |
LIGT | +10:00 | From Melbourne, Australia |
MPT | +10:00 | North Mariana Islands Time |
PGT | +10:00 | Papua New Guinea Time |
trUK | +10:00 | Truk Time |
VLAT | +10:00 | Vladivostok Time |
YAKST | +10:00 | Yakutsk Summer Time |
YAPT | +10:00 | Yap Time (Micronesia) |
ACSST | +10:30 | Central Australia Time |
CADT | +10:30 | Central Australian DST |
CST | +10:30 | Australia Central Std Time |
LHST | +10:30 | Lord Howe Standard Time, Australia |
SADT | +10:30 | South Australian Daylight Time |
AESST | +11:00 | Eastern Australia |
LHDT | +11:00 | Lord Howe Daylight Time, Australia |
MAGT | +11:00 | Magadan Time |
NCT | +11:00 | New Caledonia Time |
PONT | +11:00 | Ponape Time (Micronesia) |
VLAST | +11:00 | Vladivostok Summer Time |
VUT | +11:00 | Vanuata Time |
ANAT | +12:00 | Anadyr Time (Russia) |
CKT | +12:00 | Cook Islands Time |
GILT | +12:00 | Gilbert Islands Time |
IDLE | +12:00 | International Date Line, East |
KOST | +12:00 | Kosrae Time |
MAGST | +12:00 | Magadan Summer Time |
MHT | +12:00 | Kwajalein Time |
NZST | +12:00 | New Zealand Standard Time |
NZT | +12:00 | New Zealand Time |
PETT | +12:00 | Petropavlovsk-Kamchatski Time |
TVT | +12:00 | Tuvalu Time |
WAKT | +12:00 | Wake Time |
WFT | +12:00 | Wallis and Futuna Time |
CHAST | +12:45 | Chatham Island Time |
ANAST | +13:00 | Anadyr Summer Time (Russia) |
NZDT | +13:00 | New Zealand Daylight Time |
PETST | +13:00 | Petropavlovsk-Kamchatski Summer Time |
PHOT | +13:00 | Phoenix Islands (Kiribati) Time |
TOT | +13:00 | Tonga Time |
CHADT | +13:45 | Chatham Island Daylight Time |
LINT | +14:00 | Line Islands Time (Kiribati) |
