From Wikipedia, the free encyclopedia
This is a list of time zone abbreviations.
Time zones are often represented by alphabetic abbreviations such as «EST», «WST», and «CST», but these are not part of the international time and date standard ISO 8601 and their use as sole designator for a time zone is discouraged. Such designations can be ambiguous; for example, «CST» can mean China Standard Time (UTC+8), Cuba Standard Time (UTC−5), and (North American) Central Standard Time (UTC−6), and it is also a widely used variant of ACST (Australian Central Standard Time, UTC+9:30). Such designations predate both ISO 8601 and the internet era; in an earlier era, they were sufficiently unambiguous for many practical uses within a national context (for example, in railway timetables and business correspondence), but their ambiguity explains their deprecation in the internet era, when communications more often cannot rely on implicit geographic context to supply part of the meaning.
| Abbr. | Name | UTC offset |
|---|---|---|
| ACDT | Australian Central Daylight Saving Time | UTC+10:30 |
| ACST | Australian Central Standard Time | UTC+09:30 |
| ACT | Acre Time | UTC−05 |
| ACT | ASEAN Common Time (proposed) | UTC+08:00 |
| ACWST | Australian Central Western Standard Time (unofficial) | UTC+08:45 |
| ADT | Atlantic Daylight Time | UTC−03 |
| AEDT | Australian Eastern Daylight Saving Time | UTC+11 |
| AEST | Australian Eastern Standard Time | UTC+10 |
| AET | Australian Eastern Time | UTC+10/UTC+11 |
| AFT | Afghanistan Time | UTC+04:30 |
| AKDT | Alaska Daylight Time | UTC−08 |
| AKST | Alaska Standard Time | UTC−09 |
| ALMT | Alma-Ata Time[1] | UTC+06 |
| AMST | Amazon Summer Time (Brazil)[2] | UTC−03 |
| AMT | Amazon Time (Brazil)[3] | UTC−04 |
| AMT | Armenia Time | UTC+04 |
| ANAT | Anadyr Time[4] | UTC+12 |
| AQTT | Aqtobe Time[5] | UTC+05 |
| ART | Argentina Time | UTC−03 |
| AST | Arabia Standard Time | UTC+03 |
| AST | Atlantic Standard Time | UTC−04 |
| AWST | Australian Western Standard Time | UTC+08 |
| AZOST | Azores Summer Time | UTC±00 |
| AZOT | Azores Standard Time | UTC−01 |
| AZT | Azerbaijan Time | UTC+04 |
| BNT | Brunei Time | UTC+08 |
| BIOT | British Indian Ocean Time | UTC+06 |
| BIT | Baker Island Time | UTC−12 |
| BOT | Bolivia Time | UTC−04 |
| BRST | Brasília Summer Time | UTC−02 |
| BRT | Brasília Time | UTC−03 |
| BST | Bangladesh Standard Time | UTC+06 |
| BST | Bougainville Standard Time[6] | UTC+11 |
| BST | British Summer Time (British Standard Time from Mar 1968 to Oct 1971) | UTC+01 |
| BTT | Bhutan Time | UTC+06 |
| CAT | Central Africa Time | UTC+02 |
| CCT | Cocos Islands Time | UTC+06:30 |
| CDT | Central Daylight Time (North America) | UTC−05 |
| CDT | Cuba Daylight Time[7] | UTC−04 |
| CEST | Central European Summer Time | UTC+02 |
| CET | Central European Time | UTC+01 |
| CHADT | Chatham Daylight Time | UTC+13:45 |
| CHAST | Chatham Standard Time | UTC+12:45 |
| CHOT | Choibalsan Standard Time | UTC+08 |
| CHOST | Choibalsan Summer Time | UTC+09 |
| CHST | Chamorro Standard Time | UTC+10 |
| CHUT | Chuuk Time | UTC+10 |
| CIST | Clipperton Island Standard Time | UTC−08 |
| CKT | Cook Island Time | UTC−10 |
| CLST | Chile Summer Time | UTC−03 |
| CLT | Chile Standard Time | UTC−04 |
| COST | Colombia Summer Time | UTC−04 |
| COT | Colombia Time | UTC−05 |
| CST | Central Standard Time (North America) | UTC−06 |
| CST | China Standard Time | UTC+08 |
| CST | Cuba Standard Time | UTC−05 |
| CT | Central Time | UTC−06/UTC−05 |
| CVT | Cape Verde Time | UTC−01 |
| CWST | Central Western Standard Time (Australia) unofficial | UTC+08:45 |
| CXT | Christmas Island Time | UTC+07 |
| DAVT | Davis Time | UTC+07 |
| DDUT | Dumont d’Urville Time | UTC+10 |
| DFT | AIX-specific equivalent of Central European Time[NB 1] | UTC+01 |
| EASST | Easter Island Summer Time | UTC−05 |
| EAST | Easter Island Standard Time | UTC−06 |
| EAT | East Africa Time | UTC+03 |
| ECT | Eastern Caribbean Time (does not recognise DST) | UTC−04 |
| ECT | Ecuador Time | UTC−05 |
| EDT | Eastern Daylight Time (North America) | UTC−04 |
| EEST | Eastern European Summer Time | UTC+03 |
| EET | Eastern European Time | UTC+02 |
| EGST | Eastern Greenland Summer Time | UTC±00 |
| EGT | Eastern Greenland Time | UTC−01 |
| EST | Eastern Standard Time (North America) | UTC−05 |
| ET | Eastern Time (North America) | UTC−05 / UTC−04 |
| FET | Further-eastern European Time | UTC+03 |
| FJT | Fiji Time | UTC+12 |
| FKST | Falkland Islands Summer Time | UTC−03 |
| FKT | Falkland Islands Time | UTC−04 |
| FNT | Fernando de Noronha Time | UTC−02 |
| GALT | Galápagos Time | UTC−06 |
| GAMT | Gambier Islands Time | UTC−09 |
| GET | Georgia Standard Time | UTC+04 |
| GFT | French Guiana Time | UTC−03 |
| GILT | Gilbert Island Time | UTC+12 |
| GIT | Gambier Island Time | UTC−09 |
| GMT | Greenwich Mean Time | UTC±00 |
| GST | South Georgia and the South Sandwich Islands Time | UTC−02 |
| GST | Gulf Standard Time | UTC+04 |
| GYT | Guyana Time | UTC−04 |
| HDT | Hawaii–Aleutian Daylight Time | UTC−09 |
| HAEC | Heure Avancée d’Europe Centrale French-language name for CEST | UTC+02 |
| HST | Hawaii–Aleutian Standard Time | UTC−10 |
| HKT | Hong Kong Time | UTC+08 |
| HMT | Heard and McDonald Islands Time | UTC+05 |
| HOVST | Hovd Summer Time (not used from 2017-present) | UTC+08 |
| HOVT | Hovd Time | UTC+07 |
| ICT | Indochina Time | UTC+07 |
| IDLW | International Date Line West time zone | UTC−12 |
| IDT | Israel Daylight Time | UTC+03 |
| IOT | Indian Ocean Time | UTC+03 |
| IRDT | Iran Daylight Time | UTC+04:30 |
| IRKT | Irkutsk Time | UTC+08 |
| IRST | Iran Standard Time | UTC+03:30 |
| IST | Indian Standard Time | UTC+05:30 |
| IST | Irish Standard Time[8] | UTC+01 |
| IST | Israel Standard Time | UTC+02 |
| JST | Japan Standard Time | UTC+09 |
| KALT | Kaliningrad Time | UTC+02 |
| KGT | Kyrgyzstan Time | UTC+06 |
| KOST | Kosrae Time | UTC+11 |
| KRAT | Krasnoyarsk Time | UTC+07 |
| KST | Korea Standard Time | UTC+09 |
| LHST | Lord Howe Standard Time | UTC+10:30 |
| LHST | Lord Howe Summer Time | UTC+11 |
| LINT | Line Islands Time | UTC+14 |
| MAGT | Magadan Time | UTC+12 |
| MART | Marquesas Islands Time | UTC−09:30 |
| MAWT | Mawson Station Time | UTC+05 |
| MDT | Mountain Daylight Time (North America) | UTC−06 |
| MET | Middle European Time (same zone as CET) | UTC+01 |
| MEST | Middle European Summer Time (same zone as CEST) | UTC+02 |
| MHT | Marshall Islands Time | UTC+12 |
| MIST | Macquarie Island Station Time | UTC+11 |
| MIT | Marquesas Islands Time | UTC−09:30 |
| MMT | Myanmar Standard Time | UTC+06:30 |
| MSK | Moscow Time | UTC+03 |
| MST | Malaysia Standard Time | UTC+08 |
| MST | Mountain Standard Time (North America) | UTC−07 |
| MUT | Mauritius Time | UTC+04 |
| MVT | Maldives Time | UTC+05 |
| MYT | Malaysia Time | UTC+08 |
| NCT | New Caledonia Time | UTC+11 |
| NDT | Newfoundland Daylight Time | UTC−02:30 |
| NFT | Norfolk Island Time | UTC+11 |
| NOVT | Novosibirsk Time [9] | UTC+07 |
| NPT | Nepal Time | UTC+05:45 |
| NST | Newfoundland Standard Time | UTC−03:30 |
| NT | Newfoundland Time | UTC−03:30 |
| NUT | Niue Time | UTC−11 |
| NZDT | New Zealand Daylight Time | UTC+13 |
| NZST | New Zealand Standard Time | UTC+12 |
| OMST | Omsk Time | UTC+06 |
| ORAT | Oral Time | UTC+05 |
| PDT | Pacific Daylight Time (North America) | UTC−07 |
| PET | Peru Time | UTC−05 |
| PETT | Kamchatka Time | UTC+12 |
| PGT | Papua New Guinea Time | UTC+10 |
| PHOT | Phoenix Island Time | UTC+13 |
| PHT | Philippine Time | UTC+08 |
| PHST | Philippine Standard Time | UTC+08 |
| PKT | Pakistan Standard Time | UTC+05 |
| PMDT | Saint Pierre and Miquelon Daylight Time | UTC−02 |
| PMST | Saint Pierre and Miquelon Standard Time | UTC−03 |
| PONT | Pohnpei Standard Time | UTC+11 |
| PST | Pacific Standard Time (North America) | UTC−08 |
| PWT | Palau Time[10] | UTC+09 |
| PYST | Paraguay Summer Time[11] | UTC−03 |
| PYT | Paraguay Time[12] | UTC−04 |
| RET | Réunion Time | UTC+04 |
| ROTT | Rothera Research Station Time | UTC−03 |
| SAKT | Sakhalin Island Time | UTC+11 |
| SAMT | Samara Time | UTC+04 |
| SAST | South African Standard Time | UTC+02 |
| SBT | Solomon Islands Time | UTC+11 |
| SCT | Seychelles Time | UTC+04 |
| SDT | Samoa Daylight Time | UTC−10 |
| SGT | Singapore Time | UTC+08 |
| SLST | Sri Lanka Standard Time | UTC+05:30 |
| SRET | Srednekolymsk Time | UTC+11 |
| SRT | Suriname Time | UTC−03 |
| SST | Samoa Standard Time | UTC−11 |
| SST | Singapore Standard Time | UTC+08 |
| SYOT | Showa Station Time | UTC+03 |
| TAHT | Tahiti Time | UTC−10 |
| THA | Thailand Standard Time | UTC+07 |
| TFT | French Southern and Antarctic Time[13] | UTC+05 |
| TJT | Tajikistan Time | UTC+05 |
| TKT | Tokelau Time | UTC+13 |
| TLT | Timor Leste Time | UTC+09 |
| TMT | Turkmenistan Time | UTC+05 |
| TRT | Turkey Time | UTC+03 |
| TOT | Tonga Time | UTC+13 |
| TVT | Tuvalu Time | UTC+12 |
| ULAST | Ulaanbaatar Summer Time | UTC+09 |
| ULAT | Ulaanbaatar Standard Time | UTC+08 |
| UTC | Coordinated Universal Time | UTC±00 |
| UYST | Uruguay Summer Time | UTC−02 |
| UYT | Uruguay Standard Time | UTC−03 |
| UZT | Uzbekistan Time | UTC+05 |
| VET | Venezuelan Standard Time | UTC−04 |
| VLAT | Vladivostok Time | UTC+10 |
| VOLT | Volgograd Time | UTC+03 |
| VOST | Vostok Station Time | UTC+06 |
| VUT | Vanuatu Time | UTC+11 |
| WAKT | Wake Island Time | UTC+12 |
| WAST | West Africa Summer Time | UTC+02 |
| WAT | West Africa Time | UTC+01 |
| WEST | Western European Summer Time | UTC+01 |
| WET | Western European Time | UTC±00 |
| WIB | Western Indonesian Time | UTC+07 |
| WIT | Eastern Indonesian Time | UTC+09 |
| WITA | Central Indonesia Time | UTC+08 |
| WGST | West Greenland Summer Time[14] | UTC−02 |
| WGT | West Greenland Time[15] | UTC−03 |
| WST | Western Standard Time | UTC+08 |
| YAKT | Yakutsk Time | UTC+09 |
| YEKT | Yekaterinburg Time | UTC+05 |
| Source:[16] |
See also[edit]
- List of tz database time zones
- List of military time zones
- Lists of time zones
- Time zone abolition
References[edit]
- ^ «ALMT – Alma-Ata Time (Time Zone Abbreviation)». www.timeanddate.com. Retrieved 2019-03-04.
- ^ «AMST – Amazon Summer Time». Time and Date AS. Retrieved 2013-08-18.
- ^ «AMT – Amazon Time». Time and Date AS. Retrieved 2013-08-18.
- ^ «ANAT – Anadyr Time (Time Zone Abbreviation)». www.timeanddate.com. Retrieved 2019-03-03.
- ^ «AQTT – Aqtobe Time (Time Zone Abbreviation)». www.timeanddate.com. Retrieved 2019-03-04.
- ^ «Time Change in Papua New Guinea, 28 December 2014». TimeandDate.com. Retrieved 27 April 2015.
- ^ «CDT – Cuba Daylight Time». Time and Date AS. Retrieved 2012-10-28.
- ^ Book (eISB), electronic Irish Statute. «electronic Irish Statute Book (eISB)». www.irishstatutebook.ie.
- ^ «NOVT – Novosibirsk Time (Time Zone Abbreviation)». www.timeanddate.com. Retrieved 2019-03-04.
- ^ «PWT – Palau Time (Standard Time)». Time and Date AS. Retrieved 2021-01-26.
- ^ «PYST – Paraguay Summer Time». Time and Date AS. Retrieved 2013-08-18.
- ^ «PYT – Paraguay Time». Time and Date AS. Retrieved 2013-08-18.
- ^ «TFT – French Southern and Antarctic Time (Time Zone Abbreviation)». www.timeanddate.com. Retrieved 2019-01-02.
- ^ «WGST – West Greenland Summer Time (Time Zone Abbreviation)». www.timeanddate.com. Retrieved 2019-02-07.
- ^ «WGT – West Greenland Time (Time Zone Abbreviation)». www.timeanddate.com. Retrieved 2019-02-07.
- ^ «Time Zone Abbreviations — Worldwide List». timeanddate.com. Retrieved 2021-01-08.
{{cite web}}: CS1 maint: url-status (link)
Notes[edit]
- ^ AIX OS uses this abbreviation as an equivalent of CET
External links[edit]
- Greenwich Mean Time (GMT) :: UTC :
- MHonArc Resources: TIMEZONES
- [1][permanent dead link]
- AIX time zone table
- Time Zone Abbreviations
Although initially our world was divided into 24 standard time zones, there are much more of them. Due to a lot of geographical, social and political reasons they often deviate from the universal standards and recommendations which set by international institutions. That is why the list of time zones worldwide includes much more than 24 names and abbreviations.
Names of the time zones are usually accompanied by time zone abbreviations and require decryptions. For convenience, we have combined them into one table. You can see the list of time zones by name below:
| Abbreviation | Time Zone Name | Locations | UTC |
| ACDT | Australian Central Daylight Time | Australia | UTC +10:30 |
| CDT | Central Daylight Time | ||
| CDST | Central Daylight Savings Time | ||
| ACST | Australian Central Standard Time | Australia | UTC +9:30 |
| CST | Central Standard Time | ||
| ACT | Acre Time | South America | UTC -5 |
| ACT | Australian Central Time | Australia | UTC +9:30 / +10:30 |
| ACWST | Australian Central Western Standard Time | Australia | UTC +8:45 |
| ADT | Arabia Daylight Time | Asia | UTC +4 |
| AST | Arabia Summer Time | ||
| ADT | Atlantic Daylight Time | North America | UTC -3 |
| ADST | Atlantic Daylight Saving Time | Atlantic | |
| AST | Atlantic Summer Time | ||
| HAA | Heure Avancée de l’Atlantique (French) | ||
| AEDT | Australian Eastern Daylight Time | Australia | UTC +11 |
| EDT | Eastern Daylight Time | ||
| EDST | Eastern Daylight Saving Time | ||
| AEST | Australian Eastern Standard Time | Australia | UTC +10 |
| EST | Eastern Standard Time | ||
| AET | Australian Eastern Time | ||
| AET | Australian Eastern Time | Australia | UTC +10:00 / +11:00 |
| AFT | Afghanistan Time | Asia | UTC +4:30 |
| AKDT | Alaska Daylight Time | North America | UTC -8 |
| ADST | Alaska Daylight Saving Time | ||
| AKST | Alaska Standard Time | North America | UTC -9 |
| AT | Alaska Time | ||
| ALMT | Alma-Ata Time | Asia | UTC +6 |
| AMST | Amazon Summer Time | South America | UTC -3 |
| AMST | Armenia Summer Time | Asia | UTC +5 |
| AMDT | Armenia Daylight Time | ||
| AMT | Amazon Time | South America | UTC -4 |
| AMT | Armenia Time | Asia | UTC +4 |
| ANAST | Anadyr Summer Time | Asia | UTC +12 |
| ANAT | Anadyr Time | Asia | UTC +12 |
| AQTT | Aqtobe Time | Asia | UTC +5 |
| ART | Argentina Time | Antarctica | UTC -3 |
| South America | |||
| AST | Arabia Standard Time | Asia | UTC +3 |
| AST | Arabic Standard Time | ||
| AST | Al Manamah Standard Time | ||
| AST | Atlantic Standard Time | North America | UTC -4 |
| AT | Atlantic Time | Atlantic | |
| AST | Tiempo Estándar del Atlántico (Spanish) | Caribbean | |
| HNA | Heure Normale de l’Atlantique (French) | ||
| AT | Atlantic Time | North America | UTC -4:00 / -3:00 |
| Atlantic | |||
| AWDT | Australian Western Daylight Time | Australia | UTC +9 |
| WDT | Western Daylight Time | ||
| WST | Western Summer Time | ||
| AWST | Australian Western Standard Time | Australia | UTC +8 |
| WST | Western Standard Time | ||
| WAT | Western Australia Time | ||
| AZOST | Azores Summer Time | Atlantic | UTC +0 |
| AZODT | Azores Daylight Time | ||
| AZOT | Azores Time | Atlantic | UTC -1 |
| AZOST | Azores Standard Time | ||
| AZST | Azerbaijan Summer Time | Asia | UTC +5 |
| AZT | Azerbaijan Time | Asia | UTC +4 |
| AoE | Anywhere on Earth | Pacific | UTC -12 |
| BNT | Brunei Darussalam Time | Asia | UTC +8 |
| BDT | Brunei Time | ||
| BOT | Bolivia Time | South America | UTC -4 |
| BRST | Brasília Summer Time | South America | UTC -2 |
| BST | Brazil Summer Time | ||
| BST | Brazilian Summer Time | ||
| BRT | Brasília Time | South America | UTC -3 |
| BT | Brazil Time | ||
| BT | Brazilian Time | ||
| BST | Bangladesh Standard Time | Asia | UTC +6 |
| BST | Bougainville Standard Time | Pacific | UTC +11 |
| BST | British Summer Time | Europe | UTC +1 |
| BDT | British Daylight Time | ||
| BDST | British Daylight Saving Time | ||
| BTT | Bhutan Time | Asia | UTC +6 |
| CAST | Casey Time | Antarctica | UTC +8 |
| CAT | Central Africa Time | Africa | UTC +2 |
| CCT | Cocos Islands Time | Indian Ocean | UTC +6:30 |
| CDT | Central Daylight Time | North America | UTC -5 |
| CDST | Central Daylight Saving Time | ||
| NACDT | North American Central Daylight Time | ||
| HAC | Heure Avancée du Centre (French) | ||
| CDT | Cuba Daylight Time | Caribbean | UTC -4 |
| CEST | Central European Summer Time | Europe | UTC +2 |
| CEDT | Central European Daylight Time | Antarctica | |
| ECST | European Central Summer Time | ||
| MESZ | Mitteleuropäische Sommerzeit (German) | ||
| CET | Central European Time | Europe | UTC +1 |
| CIT | Central Indonesia Time | Indonesia | UTC +8 |
| ECT | European Central Time | Africa | |
| EIT | Eastern Indonesia Time | Indonesia | UTC +9 |
| MEZ | Mitteleuropäische Zeit (German) | ||
| CHADT | Chatham Island Daylight Time | Pacific | UTC +13:45 |
| CDT | Chatham Daylight Time | ||
| CHAST | Chatham Island Standard Time | Pacific | UTC +12:45 |
| CHOST | Choibalsan Summer Time | Asia | UTC +9 |
| CHODT | Choibalsan Daylight Time | ||
| CHODST | Choibalsan Daylight Saving Time | ||
| CHOT | Choibalsan Time | Asia | UTC +8 |
| CHUT | Chuuk Time | Pacific | UTC +10 |
| CIDST | Cayman Islands Daylight Saving Time | Caribbean | UTC -4 |
| CIST | Cayman Islands Standard Time | Caribbean | UTC -5 |
| CIT | Cayman Islands Time | ||
| CKT | Cook Island Time | Pacific | UTC -10 |
| CLST | Chile Summer Time | South America | UTC -3 |
| CLDT | Chile Daylight Time | Antarctica | |
| CLT | Chile Standard Time | South America | UTC -4 |
| CT | Chile Time | Antarctica | |
| CLST | Chile Standard Time | ||
| COT | Colombia Time | South America | UTC -5 |
| CST | Central Standard Time | North America | UTC -6 |
| CT | Central Time | Central America | |
| NACST | North American Central Standard Time | ||
| CST | Tiempo Central Estándar (Spanish) | ||
| HNC | Heure Normale du Centre (French) | ||
| CST | China Standard Time | Asia | UTC +8 |
| CST | Cuba Standard Time | Caribbean | UTC -5 |
| CT | Central Time | North America | UTC -6:00 / -5:00 |
| CVT | Cape Verde Time | Africa | UTC -1 |
| CXT | Christmas Island Time | Australia | UTC +7 |
| ChST | Chamorro Standard Time | Pacific | UTC +10 |
| GST | Guam Standard Time | ||
| DAVT | Davis Time | Antarctica | UTC +7 |
| DDUT | Dumont-d’Urville Time | Antarctica | UTC +10 |
| EASST | Easter Island Summer Time | Pacific | UTC -5 |
| EADT | Easter Island Daylight Time | ||
| EAST | Easter Island Standard Time | Pacific | UTC -6 |
| EAT | Eastern Africa Time | Africa | UTC +3 |
| EAT | East Africa Time | Indian Ocean | |
| ECT | Ecuador Time | South America | UTC -5 |
| EDT | Eastern Daylight Time | North America | UTC -4 |
| EDST | Eastern Daylight Savings Time | Caribbean | |
| NAEDT | North American Eastern Daylight Time | ||
| HAE | Heure Avancée de l’Est (French) | ||
| EDT | Tiempo de verano del Este (Spanish) | ||
| EEST | Eastern European Summer Time | Europe | UTC +3 |
| EEDT | Eastern European Daylight Time | Asia | |
| OESZ | Osteuropäische Sommerzeit (German) | ||
| EET | Eastern European Time | Europe | UTC +2 |
| OEZ | Osteuropäische Zeit (German) | Asia | |
| Africa | |||
| EGST | Eastern Greenland Summer Time | North America | UTC +0 |
| EGST | East Greenland Summer Time | ||
| EGT | East Greenland Time | North America | UTC -1 |
| EGT | Eastern Greenland Time | ||
| EST | Eastern Standard Time | North America | UTC -5 |
| ET | Eastern Time | Caribbean | |
| NAEST | North American Eastern Standard Time | Central America | |
| ET | Tiempo del Este (Spanish) | ||
| HNE | Heure Normale de l’Est (French) | ||
| ET | Eastern Time | North America | UTC -5:00 / -4:00 |
| Caribbean | |||
| FET | Further-Eastern European Time | Europe | UTC +3 |
| FJST | Fiji Summer Time | Pacific | UTC +13 |
| FJDT | Fiji Daylight Time | ||
| FJT | Fiji Time | Pacific | UTC +12 |
| FKST | Falkland Islands Summer Time | South America | UTC -3 |
| FKDT | Falkland Island Daylight Time | ||
| FKT | Falkland Island Time | South America | UTC -4 |
| FKST | Falkland Island Standard Time | ||
| FNT | Fernando de Noronha Time | South America | UTC -2 |
| GALT | Galapagos Time | Pacific | UTC -6 |
| GAMT | Gambier Time | Pacific | UTC -9 |
| GAMT | Gambier Islands Time | ||
| GET | Georgia Standard Time | Asia | UTC +4 |
| Europe | |||
| GFT | French Guiana Time | South America | UTC -3 |
| GILT | Gilbert Island Time | Pacific | UTC +12 |
| GMT | Greenwich Mean Time | Europe | UTC +0 |
| UTC | Coordinated Universal Time | Africa | |
| GT | Greenwich Time | North America | |
| Antarctica | |||
| GST | Gulf Standard Time | Asia | UTC +4 |
| GST | South Georgia Time | South America | UTC -2 |
| GYT | Guyana Time | South America | UTC -4 |
| HDT | Hawaii-Aleutian Daylight Time | North America | UTC -9 |
| HADT | Hawaii Daylight Time | ||
| HKT | Hong Kong Time | Asia | UTC +8 |
| HOVST | Hovd Summer Time | Asia | UTC +8 |
| HOVDT | Hovd Daylight Time | ||
| HOVDST | Hovd Daylight Saving Time | ||
| HOVT | Hovd Time | Asia | UTC +7 |
| HST | Hawaii Standard Time | North America | UTC -10 |
| HAST | Hawaii-Aleutian Standard Time | Pacific | |
| ICT | Indochina Time | Asia | UTC +7 |
| IDT | Israel Daylight Time | Asia | UTC +3 |
| IOT | Indian Chagos Time | Indian Ocean | UTC +6 |
| IRDT | Iran Daylight Time | Asia | UTC +4:30 |
| IRST | Iran Summer Time | ||
| IDT | Iran Daylight Time | ||
| IRKST | Irkutsk Summer Time | Asia | UTC +9 |
| IRKT | Irkutsk Time | Asia | UTC +8 |
| IRST | Iran Standard Time | Asia | UTC +3:30 |
| IT | Iran Time | ||
| IST | India Standard Time | Asia | UTC +5:30 |
| IT | India Time | ||
| IST | Indian Standard Time | ||
| IST | Irish Standard Time | Europe | UTC +1 |
| IST | Irish Summer Time | ||
| IST | Israel Standard Time | Asia | UTC +2 |
| JST | Japan Standard Time | Asia | UTC +9 |
| KGT | Kyrgyzstan Time | Asia | UTC +6 |
| KOST | Kosrae Time | Pacific | UTC +11 |
| KRAST | Krasnoyarsk Summer Time | Asia | UTC +8 |
| KRAT | Krasnoyarsk Time | Asia | UTC +7 |
| KST | Korea Standard Time | Asia | UTC +9 |
| KST | Korean Standard Time | ||
| KT | Korea Time | ||
| KUYT | Kuybyshev Time | Europe | UTC +4 |
| SAMST | Samara Summer Time | ||
| LHDT | Lord Howe Daylight Time | Australia | UTC +11 |
| LHST | Lord Howe Standard Time | Australia | UTC +10:30 |
| LINT | Line Islands Time | Pacific | UTC +14 |
| MAGST | Magadan Summer Time | Asia | UTC +12 |
| MAGST | Magadan Island Summer Time | ||
| MAGT | Magadan Time | Asia | UTC +11 |
| MAGT | Magadan Island Time | ||
| MART | Marquesas Time | Pacific | UTC -9:30 |
| MAWT | Mawson Time | Antarctica | UTC +5 |
| MDT | Mountain Daylight Time | North America | UTC -6 |
| MDST | Mountain Daylight Saving Time | ||
| NAMDT | North American Mountain Daylight Time | ||
| HAR | Heure Avancée des Rocheuses (French) | ||
| MHT | Marshall Islands Time | Pacific | UTC +12 |
| MMT | Myanmar Time | Asia | UTC +6:30 |
| MSD | Moscow Daylight Time | Europe | UTC +4 |
| Moscow Summer Time | |||
| MSK | Moscow Standard Time | Europe | UTC +3 |
| MCK | Moscow Time | Asia | |
| MST | Mountain Standard Time | North America | UTC -7 |
| MT | Mountain Time | ||
| NAMST | North American Mountain Standard Time | ||
| HNR | Heure Normale des Rocheuses (French) | ||
| MT | Mountain Time | North America | UTC -7:00 / -6:00 |
| MUT | Mauritius Time | Africa | UTC +4 |
| MVT | Maldives Time | Asia | UTC +5 |
| MYT | Malaysia Time | Asia | UTC +8 |
| MST | Malaysian Standard Time | ||
| NCT | New Caledonia Time | Pacific | UTC +11 |
| NDT | Newfoundland Daylight Time | North America | UTC -2:30 |
| HAT | Heure Avancée de Terre-Neuve (French) | ||
| NFDT | Norfolk Daylight Time | Australia | UTC +12 |
| NFDT | Norfolk Island Daylight Time | ||
| NFT | Norfolk Time | Australia | UTC +11 |
| NFT | Norfolk Island Time | ||
| NOVST | Novosibirsk Summer Time | Asia | UTC +7 |
| OMSST | Omsk Summer Time | ||
| NOVT | Novosibirsk Time | Asia | UTC +7 |
| OMST | Omsk Standard Time | ||
| NPT | Nepal Time | Asia | UTC +5:45 |
| NRT | Nauru Time | Pacific | UTC +12 |
| NST | Newfoundland Standard Time | North America | UTC -3:30 |
| HNT | Heure Normale de Terre-Neuve (French) | ||
| NUT | Niue Time | Pacific | UTC -11 |
| NZDT | New Zealand Daylight Time | Pacific | UTC +13 |
| Antarctica | |||
| NZST | New Zealand Standard Time | Pacific | UTC +12 |
| Antarctica | |||
| OMSST | Omsk Summer Time | Asia | UTC +7 |
| NOVST | Novosibirsk Summer Time | ||
| OMST | Omsk Standard Time | Asia | UTC +6 |
| OMST | Omsk Time | ||
| NOVT | Novosibirsk Time | ||
| ORAT | Oral Time | Asia | UTC +5 |
| PDT | Pacific Daylight Time | North America | UTC -7 |
| PDST | Pacific Daylight Saving Time | ||
| NAPDT | North American Pacific Daylight Time | ||
| HAP | Heure Avancée du Pacifique (French) | ||
| PET | Peru Time | South America | UTC -5 |
| PETST | Kamchatka Summer Time | Asia | UTC +12 |
| PETT | Kamchatka Time | Asia | UTC +12 |
| PETT | Petropavlovsk-Kamchatski Time | ||
| PGT | Papua New Guinea Time | Pacific | UTC +10 |
| PHOT | Phoenix Island Time | Pacific | UTC +13 |
| PHT | Philippine Time | Asia | UTC +8 |
| PST | Philippine Standard Time | ||
| PKT | Pakistan Standard Time | Asia | UTC +5 |
| PKT | Pakistan Time | ||
| PMDT | Pierre & Miquelon Daylight Time | North America | UTC -2 |
| PMST | Pierre & Miquelon Standard Time | North America | UTC -3 |
| PONT | Pohnpei Standard Time | Pacific | UTC +11 |
| PST | Pacific Standard Time | North America | UTC -8 |
| PT | Pacific Time | ||
| NAPST | North American Pacific Standard Time | ||
| PT | Tiempo del Pacífico (Spanish) | ||
| HNP | Heure Normale du Pacifique (French) | ||
| PST | Pitcairn Standard Time | Pacific | UTC -8 |
| PT | Pacific Time | North America | UTC -8:00 / -7:00 |
| PWT | Palau Time | Pacific | UTC +9 |
| PYST | Paraguay Summer Time | South America | UTC -3 |
| PYT | Paraguay Time | South America | UTC -4 |
| PYT | Pyongyang Time | Asia | UTC +8:30 |
| PYST | Pyongyang Standard Time | ||
| QYZT | Qyzylorda Time | Asia | UTC +6 |
| RET | Reunion Time | Africa | UTC +4 |
| ROTT | Rothera Time | Antarctica | UTC -3 |
| SAKT | Sakhalin Time | Asia | UTC +11 |
| SAMT | Samara Time | Europe | UTC +4 |
| SAMT | Samara Standard Time | ||
| SAST | South Africa Standard Time | Africa | UTC +2 |
| SAST | South African Standard Time | ||
| SBT | Solomon Islands Time | Pacific | UTC +11 |
| SBT | Solomon Island Time | ||
| SCT | Seychelles Time | Africa | UTC +4 |
| SGT | Singapore Time | Asia | UTC +8 |
| SST | Singapore Standard Time | ||
| SRET | Srednekolymsk Time | Asia | UTC +11 |
| SRT | Suriname Time | South America | UTC -3 |
| SST | Samoa Standard Time | Pacific | UTC -11 |
| SYOT | Syowa Time | Antarctica | UTC +3 |
| TAHT | Tahiti Time | Pacific | UTC -10 |
| TFT | French Southern and Antarctic Time | Indian Ocean | UTC +5 |
| KIT | Kerguelen (Islands) Time | ||
| TJT | Tajikistan Time | Asia | UTC +5 |
| TKT | Tokelau Time | Pacific | UTC +13 |
| TLT | East Timor Time | Asia | UTC +9 |
| TMT | Turkmenistan Time | Asia | UTC +5 |
| TOST | Tonga Summer Time | Pacific | UTC +14 |
| TOT | Tonga Time | Pacific | UTC +13 |
| TRT | Turkey Time | Asia | UTC +3 |
| Europe | |||
| TVT | Tuvalu Time | Pacific | UTC +12 |
| ULAST | Ulaanbaatar Summer Time | Asia | UTC +9 |
| ULAST | Ulan Bator Summer Time | ||
| ULAT | Ulaanbaatar Time | Asia | UTC +8 |
| ULAT | Ulan Bator Time | ||
| UTC | Coordinated Universal Time | Worldwide | UTC |
| UYST | Uruguay Summer Time | South America | UTC -2 |
| UYT | Uruguay Time | South America | UTC -3 |
| UZT | Uzbekistan Time | Asia | UTC +5 |
| VET | Venezuelan Standard Time | South America | UTC -4 |
| HLV | Hora Legal de Venezuela (Spanish) | ||
| VLAST | Vladivostok Summer Time | Asia | UTC +11 |
| VLAT | Vladivostok Time | Asia | UTC +10 |
| VOST | Vostok Time | Antarctica | UTC +6 |
| VUT | Vanuatu Time | Pacific | UTC +11 |
| EFATE | Efate Time | ||
| WAKT | Wake Time | Pacific | UTC +12 |
| WARST | Western Argentine Summer Time | South America | UTC -3 |
| WAST | West Africa Summer Time | Africa | UTC +2 |
| WAT | West Africa Time | Africa | UTC +1 |
| WEST | Western European Summer Time | Europe | UTC +1 |
| WEDT | Western European Daylight Time | Africa | |
| WESZ | Westeuropäische Sommerzeit (German) | ||
| WET | Western European Time | Europe | UTC +0 |
| GMT | Greenwich Mean Time | Africa | |
| WEZ | Westeuropäische Zeit (German) | ||
| WFT | Wallis and Futuna Time | Pacific | UTC +12 |
| WGST | Western Greenland Summer Time | North America | UTC -2 |
| WGST | West Greenland Summer Time | ||
| WGT | West Greenland Time | North America | UTC -3 |
| WGT | Western Greenland Time | ||
| WIB | Western Indonesian Time | Asia | UTC +7 |
| WIB | Waktu Indonesia Barat | ||
| WIT | Eastern Indonesian Time | Asia | UTC +9 |
| WIT | Waktu Indonesia Timur | ||
| WITA | Central Indonesian Time | Asia | UTC +8 |
| WITA | Waktu Indonesia Tengah | ||
| WST | West Samoa Time | Pacific | UTC +13 |
| WSDT | West Samoa Daylight TimeDST of West Samoa Time | Pacific | UTC +14 |
| SLT | Sri Lanka Time | Sri Lanka | +5:30 |
| ST | Samoa Time | ||
| WST | Western Sahara Summer Time | Africa | UTC +1 |
| WT | Western Sahara Standard Time | Africa | UTC +0 |
| WT | Western Sahara Time | ||
| XJT | Xinjiang Time | Asia | UTC +6 |
| YAKST | Yakutsk Summer Time | Asia | UTC +10 |
| YAKT | Yakutsk Time | Asia | UTC +9 |
| YAPT | Yap Time | Pacific | UTC +10 |
| YEKST | Yekaterinburg Summer Time | Asia | UTC +6 |
| YEKT | Yekaterinburg Time | Asia | UTC +5 |
It is hard to give an exact number of time zones names. The traditional approach to classifying time zones involves the division of the earth by 24 of time zones. Most worldwide timezones really differ from each other by exactly one hour. By convention, their local time is calculated as an offset from UTC or GMT. At the same time, in many countries and cities, these offsets change twice a year due to the transition to daylight saving time (named summer time in some countries).
The exception of such an approach is those countries which also need to reflect inner processes within the regions. For example:
As a result, there are many more than 24 time zones in the world. Every country may have a particular standard time zone with its specific name and abbreviation (time zone code).
Different names and abbreviations are useful for identifying a particular country or location. For this reason, different time zone codes are used in different countries even if they belong to the same time zone.
Time zones list shows the diversity of their name and designations. Time zone abbreviation often consists of several letters, which mean:
Anyway decoding of all abbreviations for time zones is listed above. For convenience, the list of timezones by country is sorted alphabetically.
CDT – Central Daylight Time
CDST – Central Daylight Savings Time
CST – Central Standard Time
AST – Arabia Summer Time
ADST – Atlantic Daylight Saving Time
AST – Atlantic Summer Time
HAA – Heure Avancée de l’Atlantique (French)
Atlantic
EDT – Eastern Daylight Time
EDST – Eastern Daylight Saving Time
EST – Eastern Standard Time
AET – Australian Eastern Time
ADST – Alaska Daylight Saving Time
AT – Alaska Time
AMDT – Armenia Daylight Time
South America
AST – Arabic Standard Time
AST – Al Manamah Standard Time
AT – Atlantic Time
AST – Tiempo Estándar del Atlántico (Spanish)
HNA – Heure Normale de l’Atlantique (French)
Atlantic
Caribbean
Atlantic
WDT – Western Daylight Time
WST – Western Summer Time
WST – Western Standard Time
WAT – Western Australia Time
AZODT – Azores Daylight Time
AZOST – Azores Standard Time
BDT – Brunei Time
BST – Brazil Summer Time
BST – Brazilian Summer Time
BT – Brazil Time
BT – Brazilian Time
BDT – British Daylight Time
BDST – British Daylight Saving Time
CDST – Central Daylight Saving Time
NACDT – North American Central Daylight Time
HAC – Heure Avancée du Centre (French)
CEDT – Central European Daylight Time
ECST – European Central Summer Time
MESZ – Mitteleuropäische Sommerzeit (German)
Antarctica
ECT – European Central Time
CET – Central Europe Time
MEZ – Mitteleuropäische Zeit (German)
Africa
CDT – Chatham Daylight Time
CHODT – Choibalsan Daylight Time
CHODST – Choibalsan Daylight Saving Time
CIT – Cayman Islands Time
CLDT – Chile Daylight Time
Antarctica
CT – Chile Time
CLST – Chile Standard Time
Antarctica
CT – Central Time
NACST – North American Central Standard Time
CST – Tiempo Central Estándar (Spanish)
HNC – Heure Normale du Centre (French)
Central America
GST – Guam Standard Time
EADT – Easter Island Daylight Time
EAT – East Africa Time
Indian Ocean
EDST – Eastern Daylight Savings Time
NAEDT – North American Eastern Daylight Time
HAE – Heure Avancée de l’Est (French)
EDT – Tiempo de verano del Este (Spanish)
Caribbean
EEDT – Eastern European Daylight Time
OESZ – Osteuropäische Sommerzeit (German)
Asia
OEZ – Osteuropäische Zeit (German)
Asia
Africa
EGST – East Greenland Summer Time
EGT – Eastern Greenland Time
ET – Eastern Time
NAEST – North American Eastern Standard Time
ET – Tiempo del Este (Spanish)
HNE – Heure Normale de l’Est (French)
Caribbean
Central America
Caribbean
FJDT – Fiji Daylight Time
FKDT – Falkland Island Daylight Time
FKST – Falkland Island Standard Time
GAMT – Gambier Islands Time
Europe
UTC – Coordinated Universal Time
GT – Greenwich Time
Africa
North America
Antarctica
HADT – Hawaii Daylight Time
HOVDT – Hovd Daylight Time
HOVDST – Hovd Daylight Saving Time
HAST – Hawaii-Aleutian Standard Time
Pacific
IRST – Iran Summer Time
IDT – Iran Daylight Time
IT – Iran Time
IT – India Time
IST – Indian Standard Time
IST – Irish Summer Time
KST – Korean Standard Time
KT – Korea Time
SAMST – Samara Summer Time
MAGST – Magadan Island Summer Time
MAGT – Magadan Island Time
MDST – Mountain Daylight Saving Time
NAMDT – North American Mountain Daylight Time
HAR – Heure Avancée des Rocheuses (French)
Moscow Summer Time
MCK – Moscow Time
Asia
MT – Mountain Time
NAMST – North American Mountain Standard Time
HNR – Heure Normale des Rocheuses (French)
MST – Malaysian Standard Time
HAT – Heure Avancée de Terre-Neuve (French)
NFDT – Norfolk Island Daylight Time
NFT – Norfolk Island Time
OMSST – Omsk Summer Time
OMST – Omsk Standard Time
HNT – Heure Normale de Terre-Neuve (French)
Antarctica
Antarctica
NOVST – Novosibirsk Summer Time
OMST – Omsk Time
NOVT – Novosibirsk Time
PDST – Pacific Daylight Saving Time
NAPDT – North American Pacific Daylight Time
HAP – Heure Avancée du Pacifique (French)
PETT – Petropavlovsk-Kamchatski Time
PST – Philippine Standard Time
PKT – Pakistan Time
PT – Pacific Time
NAPST – North American Pacific Standard Time
PT – Tiempo del Pacífico (Spanish)
HNP – Heure Normale du Pacifique (French)
PYST – Pyongyang Standard Time
SAMT – Samara Standard Time
SAST – South African Standard Time
SBT – Solomon Island Time
SST – Singapore Standard Time
KIT – Kerguelen (Islands) Time
Europe
ULAST – Ulan Bator Summer Time
ULAT – Ulan Bator Time
HLV – Hora Legal de Venezuela (Spanish)
EFATE – Efate Time
WEDT – Western European Daylight Time
WESZ – Westeuropäische Sommerzeit (German)
Africa
GMT – Greenwich Mean Time
WEZ – Westeuropäische Zeit (German)
Africa
WGST – West Greenland Summer Time
WGT – Western Greenland Time
WIB – Waktu Indonesia Barat
WIT – Waktu Indonesia Timur
WITA – Waktu Indonesia Tengah
ST – Samoa Time
WT – Western Sahara Time
This is the complete list of time zone abbreviations, where you can select a time zone to get the current time there. The chart includes both time zone abbreviation and the full time zone name, as well as the time zone offset. It can be a very useful chart for those who need to know the precise time at a certain time zone. This list of time zone abbreviations can also be used by website designers, programming engineers, as well as by other specialists.
You can search timezones by name, and the list of time zone abbreviations result will be listed in the table.
Search Time Zone Abbreviation
| Time Zone Abbreviation | Time Zone Name | Offset |
|---|---|---|
| GMT | Greenwich Mean Time | UTC |
| IBST | International Business Standard Time | UTC |
| WET | Western European Time | UTC |
| Z | Zulu Time (Coordinated Universal Time) | UTC |
| EGST | Eastern Greenland Summer Time | UTC+00 |
| BST | British Summer Time | UTC+01 |
| CET | Central European Time | UTC+01 |
| DFT | AIX specific equivalent of Central European Time | UTC+01 |
| IST | Irish Standard Time | UTC+01 |
| MET | Middle European Time Same zone as CET | UTC+01 |
| WAT | West Africa Time | UTC+01 |
| WEDT | Western European Daylight Time | UTC+01 |
| WEST | Western European Summer Time | UTC+01 |
| CAT | Central Africa Time | UTC+02 |
| CEDT | Central European Daylight Time | UTC+02 |
| CEST | Central European Summer Time | UTC+02 |
| EET | Eastern European Time | UTC+02 |
| HAEC | Heure Avancée d’Europe Centrale francised name for CEST | UTC+02 |
| IST Israel | Israel Standard Time | UTC+02 |
| MEST | Middle European Summer Time Same zone as CEST | UTC+02 |
| SAST | South African Standard Time | UTC+02 |
| USZ1 | Kaliningrad Time | UTC+02 |
| WAST | West Africa Summer Time | UTC+02 |
| AST Arabia | Arabia Standard Time | UTC+03 |
| EAT | East Africa Time | UTC+03 |
| EEDT | Eastern European Daylight Time | UTC+03 |
| EEST | Eastern European Summer Time | UTC+03 |
| FET | Further-eastern European Time | UTC+03 |
| IDT | Israel Daylight Time | UTC+03 |
| IOT | Indian Ocean Time | UTC+03 |
| MSK | Moscow Time | UTC+03 |
| SYOT | Showa Station Time | UTC+03 |
| IRST | Iran Standard Time | UTC+03:30 |
| AMT Armenia | Armenia Time | UTC+04 |
| AZT | Azerbaijan Time | UTC+04 |
| GET | Georgia Standard Time | UTC+04 |
| GST Gulf | Gulf Standard Time | UTC+04 |
| MUT | Mauritius Time | UTC+04 |
| RET | Réunion Time | UTC+04 |
| SAMT | Samara Time | UTC+04 |
| SCT | Seychelles Time | UTC+04 |
| VOLT | Volgograd Time | UTC+04 |
| AFT | Afghanistan Time | UTC+04:30 |
| IRDT | Iran Daylight Time | UTC+04:30 |
| HMT | Heard and McDonald Islands Time | UTC+05 |
| MAWT | Mawson Station Time | UTC+05 |
| MVT | Maldives Time | UTC+05 |
| ORAT | Oral Time | UTC+05 |
| PKT | Pakistan Standard Time | UTC+05 |
| TFT | Indian/Kerguelen | UTC+05 |
| TJT | Tajikistan Time | UTC+05 |
| TMT | Turkmenistan Time | UTC+05 |
| UZT | Uzbekistan Time | UTC+05 |
| YEKT | Yekaterinburg Time | UTC+05 |
| IST Indian | Indian Standard Time | UTC+05:30 |
| SLST | Sri Lanka Standard Time | UTC+05:30 |
| NPT | Nepal Time | UTC+05:45 |
| BDT Bangladesh | Bangladesh Daylight Time | UTC+06 |
| BIOT | British Indian Ocean Time | UTC+06 |
| BST Bangladesh | Bangladesh Standard Time | UTC+06 |
| BTT | Bhutan Time | UTC+06 |
| KGT | Kyrgyzstan time | UTC+06 |
| OMST | Omsk Time | UTC+06 |
| VOST | Vostok Station Time | UTC+06 |
| CCT | Cocos Islands Time | UTC+06:30 |
| MMT | Myanmar Time | UTC+06:30 |
| MST Myanmar | Myanmar Standard Time | UTC+06:30 |
| CXT | Christmas Island Time | UTC+07 |
| DAVT | Davis Time | UTC+07 |
| HOVT | Khovd Time | UTC+07 |
| ICT | Indochina Time | UTC+07 |
| KRAT | Krasnoyarsk Time | UTC+07 |
| THA | Thailand Standard Time | UTC+07 |
| WIT | Western Indonesian Time | UTC+07 |
| ACT | ASEAN Common Time | UTC+08 |
| AWST | Australian Western Standard Time | UTC+08 |
| BDT | Brunei Time | UTC+08 |
| CHOT | Choibalsan | UTC+08 |
| CIT | Central Indonesia Time | UTC+08 |
| CST China | China Standard Time | UTC+08 |
| CT | China time | UTC+08 |
| HKT | Hong Kong Time | UTC+08 |
| IRKT | Irkutsk Time | UTC+08 |
| MST Malaysia | Malaysia Standard Time | UTC+08 |
| MYT | Malaysia Time | UTC+08 |
| PST Philippine | Philippine Standard Time | UTC+08 |
| SGT | Singapore Time | UTC+08 |
| SST | Singapore Standard Time | UTC+08 |
| ULAT | Ulaanbaatar Time | UTC+08 |
| WST | Western Standard Time | UTC+08 |
| CWST | Central Western Standard Time (Australia) | UTC+08:45 |
| AWDT | Australian Western Daylight Time | UTC+09 |
| EIT | Eastern Indonesian Time | UTC+09 |
| JST | Japan Standard Time | UTC+09 |
| KST | Korea Standard Time | UTC+09 |
| TLT | Timor Leste Time | UTC+09 |
| YAKT | Yakutsk Time | UTC+09 |
| ACST | Australian Central Standard Time | UTC+09:30 |
| CST Australia Central | Central Standard Time (Australia) | UTC+09:30 |
| AEST | Australian Eastern Standard Time | UTC+10 |
| ChST | Chamorro Standard Time | UTC+10 |
| CHUT | Chuuk Time | UTC+10 |
| DDUT | Dumont d’Urville Time | UTC+10 |
| EST Australia | Eastern Standard Time (Australia) | UTC+10 |
| PGT | Papua New Guinea Time | UTC+10 |
| VLAT | Vladivostok Time | UTC+10 |
| ACDT | Australian Central Daylight Savings Time | UTC+10:30 |
| CST Australia Central Summer | Central Summer Time (Australia) | UTC+10:30 |
| LHST | Lord Howe Standard Time | UTC+10:30 |
| AEDT | Australian Eastern Daylight Savings Time | UTC+11 |
| BST Bougainville | Bougainville Standard Time | UTC+11 |
| KOST | Kosrae Time | UTC+11 |
| LHST Lord Howe Summer | Lord Howe Summer Time | UTC+11 |
| MIST | Macquarie Island Station Time | UTC+11 |
| NCT | New Caledonia Time | UTC+11 |
| PONT | Pohnpei Standard Time | UTC+11 |
| SAKT | Sakhalin Island time | UTC+11 |
| SBT | Solomon Islands Time | UTC+11 |
| SRET | Srednekolymsk Time | UTC+11 |
| VUT | Vanuatu Time | UTC+11 |
| NFT | Norfolk Time | UTC+11:00 |
| FJT | Fiji Time | UTC+12 |
| GILT | Gilbert Island Time | UTC+12 |
| MAGT | Magadan Time | UTC+12 |
| MHT | Marshall Islands | UTC+12 |
| NZST | New Zealand Standard Time | UTC+12 |
| PETT | Kamchatka Time | UTC+12 |
| TVT | Tuvalu Time | UTC+12 |
| WAKT | Wake Island Time | UTC+12 |
| CHAST | Chatham Standard Time | UTC+12:45 |
| NZDT | New Zealand Daylight Time | UTC+13 |
| PHOT | Phoenix Island Time | UTC+13 |
| TKT | Tokelau Time | UTC+13 |
| TOT | Tonga Time | UTC+13 |
| CHADT | Chatham Daylight Time | UTC+13:45 |
| LINT | Line Islands Time | UTC+14 |
| AZOST | Azores Standard Time | UTC-01 |
| CVT | Cape Verde Time | UTC-01 |
| EGT | Eastern Greenland Time | UTC-01 |
| BRST | Brasilia Summer Time | UTC-02 |
| FNT | Fernando de Noronha Time | UTC-02 |
| GST | South Georgia and the South Sandwich Islands | UTC-02 |
| PMDT | Saint Pierre and Miquelon Daylight time | UTC-02 |
| UYST | Uruguay Summer Time | UTC-02 |
| NDT | Newfoundland Daylight Time | UTC-02:30 |
| ADT | Atlantic Daylight Time | UTC-03 |
| AMST | Amazon Summer Time (Brazil) | UTC-03 |
| ART | Argentina Time | UTC-03 |
| BRT | Brasilia Time | UTC-03 |
| CLST | Chile Summer Time | UTC-03 |
| FKST | Falkland Islands Standard Time | UTC-03 |
| FKST Falkland Islands Summer | Falkland Islands Summer Time | UTC-03 |
| GFT | French Guiana Time | UTC-03 |
| PMST | Saint Pierre and Miquelon Standard Time | UTC-03 |
| PYST | Paraguay Summer Time (South America) | UTC-03 |
| ROTT | Rothera Research Station Time | UTC-03 |
| SRT | Suriname Time | UTC-03 |
| UYT | Uruguay Standard Time | UTC-03 |
| NST | Newfoundland Standard Time | UTC-03:30 |
| NT | Newfoundland Time | UTC-03:30 |
| AMT | Amazon Time (Brazil) | UTC-04 |
| AST | Atlantic Standard Time | UTC-04 |
| BOT | Bolivia Time | UTC-04 |
| CDT Cuba | Cuba Daylight Time | UTC-04 |
| CLT | Chile Standard Time | UTC-04 |
| COST | Colombia Summer Time | UTC-04 |
| ECT | Eastern Caribbean Time | UTC-04 |
| EDT | Eastern Daylight Time (North America) | UTC-04 |
| FKT | Falkland Islands Time | UTC-04 |
| GYT | Guyana Time | UTC-04 |
| PYT | Paraguay Time (South America) | UTC-04 |
| VET | Venezuelan Standard Time | UTC-04:30 |
| ACT Acre | Acre Time | UTC-05 |
| CDT | Central Daylight Time (North America) | UTC-05 |
| COT | Colombia Time | UTC-05 |
| CST Cuba | Cuba Standard Time | UTC-05 |
| EASST | Easter Island Standard Summer Time | UTC-05 |
| ECT Ecuador | Ecuador Time | UTC-05 |
| EST | Eastern Standard Time (North America) | UTC-05 |
| PET | Peru Time | UTC-05 |
| CST | Central Standard Time (North America) | UTC-06 |
| EAST | Easter Island Standard Time | UTC-06 |
| GALT | Galapagos Time | UTC-06 |
| MDT | Mountain Daylight Time (North America) | UTC-06 |
| MST | Mountain Standard Time (North America) | UTC-07 |
| PDT | Pacific Daylight Time (North America) | UTC-07 |
| AKDT | Alaska Daylight Time | UTC-08 |
| CIST | Clipperton Island Standard Time | UTC-08 |
| PST | Pacific Standard Time (North America) | UTC-08 |
| AKST | Alaska Standard Time | UTC-09 |
| GAMT | Gambier Islands | UTC-09 |
| GIT | Gambier Island Time | UTC-09 |
| HADT | Hawaii-Aleutian Daylight Time | UTC-09 |
| MART | Marquesas Islands Time | UTC-09:30 |
| MIT | Marquesas Islands Time | UTC-09:30 |
| CKT | Cook Island Time | UTC-10 |
| HAST | Hawaii-Aleutian Standard Time | UTC-10 |
| HST | Hawaii Standard Time | UTC-10 |
| TAHT | Tahiti Time | UTC-10 |
| NUT | Niue Time | UTC-11 |
| SST Samoa | Samoa Standard Time | UTC-11 |
| BIT | Baker Island Time | UTC-12 |
A time zone is a region on Earth with a uniform standard time for legal, commercial, and social purposes. It is convenient for close commercial or other communication areas to keep the same time, so time zones tend to follow the boundaries of countries and their subdivisions.
Most of the time zones on land are offset from Coordinated Universal Time (UTC) by a whole number of hours (UTC−12 to UTC+14), but a few are offset by 30 or 45 minutes. Some higher latitude countries use daylight saving time for part of the year, typically by changing clocks by an hour. Many land time zones are skewed toward the west of the corresponding nautical time zones. This also creates a permanent daylight-saving time effect.
Alphabetically sorted. Note that some abbreviations are not unique; these will have several entries in the list. Other time zones have many common names, each of which will be listed.
| Abbreviation | Full name | Location | Timezone |
| A | Alpha Time Zone | Military | UTC + 1 hour |
| ACDT | Australian Central Daylight Time | Australia | UTC + 10:30 hours |
| ACST | Australian Central Standard Time | Australia | UTC + 9:30 hours |
| ADT | Atlantic Daylight Time | North America | UTC – 3 hours |
| AEDT | Australian Eastern Dayl. Time or Australian Eastern Summer Time | Australia | UTC + 11 hours |
| AEST | Australian Eastern Standard Time | Australia | UTC + 10 hours |
| AKDT | Alaska Daylight Time | North America | UTC – 8 hours |
| AKST | Alaska Standard Time | North America | UTC – 9 hours |
| AST | Atlantic Standard Time | North America | UTC – 4 hours |
| AWDT | Australian Western Daylight Time | Australia | UTC + 9 hours |
| AWST | Australian Western Standard Time | Australia | UTC + 8 hours |
| B | Bravo Time Zone | Military | UTC + 2 hours |
| BST | British Summer Time | Europe | UTC + 1 hour |
| C | Charlie Time Zone | Military | UTC + 3 hours |
| CDT | Central Daylight Time | Australia | UTC + 10:30 hours |
| CDT | Central Daylight Time | North America | UTC – 5 hours |
| CEDT | Central European Daylight Time | Europe | UTC + 2 hours |
| CEST | Central European Summer Time | Europe | UTC + 2 hours |
| CET | Central European Time | Europe | UTC + 1 hour |
| CST | Central Summer Time | Australia | UTC + 10:30 hours |
| CST | Central Standard Time | Australia | UTC + 9:30 hours |
| CST | Central Standard Time | North America | UTC – 6 hours |
| CXT | Christmas Island Time | Australia | UTC + 7 hours |
| D | Delta Time Zone | Military | UTC + 4 hours |
| E | Echo Time Zone | Military | UTC + 5 hours |
| EDT | Eastern Daylight Time | Australia | UTC + 11 hours |
| EDT | Eastern Daylight Time | North America | UTC – 4 hours |
| EEDT | Eastern European Daylight Time | Europe | UTC + 3 hours |
| EEST | Eastern European Summer Time | Europe | UTC + 3 hours |
| EET | Eastern European Time | Europe | UTC + 2 hours |
| EST | Eastern Summer Time | Australia | UTC + 11 hours |
| EST | Eastern Standard Time | Australia | UTC + 10 hours |
| EST | Eastern Standard Time | North America | UTC – 5 hours |
| F | Foxtrot Time Zone | Military | UTC + 6 hours |
| G | Golf Time Zone | Military | UTC + 7 hours |
| GMT | Greenwich Mean Time | Europe | UTC |
| H | Hotel Time Zone | Military | UTC + 8 hours |
| HAA | Heure Avancée de l’Atlantique | North America | UTC – 3 hours |
| HAC | Heure Avancée du Centre | North America | UTC – 5 hours |
| HADT | Hawaii-Aleutian Daylight Time | North America | UTC – 9 hours |
| HAE | Heure Avancée de l’Est | North America | UTC – 4 hours |
| HAP | Heure Avancée du Pacifique | North America | UTC – 7 hours |
| HAR | Heure Avancée des Rocheuses | North America | UTC – 6 hours |
| HAST | Hawaii-Aleutian Standard Time | North America | UTC – 10 hours |
| HAT | Heure Avancée de Terre-Neuve | North America | UTC – 2:30 hours |
| HAY | Heure Avancée du Yukon | North America | UTC – 8 hours |
| HNA | Heure Normale de l’Atlantique | North America | UTC – 4 hours |
| HNC | Heure Normale du Centre | North America | UTC – 6 hours |
| HNE | Heure Normale de l’Est | North America | UTC – 5 hours |
| HNP | Heure Normale du Pacifique | North America | UTC – 8 hours |
| HNR | Heure Normale des Rocheuses | North America | UTC – 7 hours |
| HNT | Heure Normale de Terre-Neuve | North America | UTC – 3:30 hours |
| HNY | Heure Normale du Yukon | North America | UTC – 9 hours |
| I | India Time Zone | Military | UTC + 9 hours |
| IST | Irish Summer Time | Europe | UTC + 1 hour |
| K | Kilo Time Zone | Military | UTC + 10 hours |
| L | Lima Time Zone | Military | UTC + 11 hours |
| M | Mike Time Zone | Military | UTC + 12 hours |
| MDT | Mountain Daylight Time | North America | UTC – 6 hours |
| MESZ | Mitteleuroäische Sommerzeit | Europe | UTC + 2 hours |
| MEZ | Mitteleuropäische Zeit | Europe | UTC + 1 hour |
| MSD | Moscow Daylight Time | Europe | UTC + 4 hours |
| MSK | Moscow Standard Time | Europe | UTC + 3 hours |
| MST | Mountain Standard Time | North America | UTC – 7 hours |
| N | November Time Zone | Military | UTC – 1 hour |
| NDT | Newfoundland Daylight Time | North America | UTC – 2:30 hours |
| NFT | Norfolk (Island) Time | Australia | UTC + 11:30 hours |
| NST | Newfoundland Standard Time | North America | UTC – 3:30 hours |
| O | Oscar Time Zone | Military | UTC – 2 hours |
| P | Papa Time Zone | Military | UTC – 3 hours |
| PDT | Pacific Daylight Time | North America | UTC – 7 hours |
| PST | Pacific Standard Time | North America | UTC – 8 hours |
| Q | Quebec Time Zone | Military | UTC – 4 hours |
| R | Romeo Time Zone | Military | UTC – 5 hours |
| S | Sierra Time Zone | Military | UTC – 6 hours |
| T | Tango Time Zone | Military | UTC – 7 hours |
| U | Uniform Time Zone | Military | UTC – 8 hours |
| UTC | Coordinated Universal Time | Europe | UTC |
| V | Victor Time Zone | Military | UTC – 9 hours |
| W | Whiskey Time Zone | Military | UTC – 10 hours |
| WDT | Western Daylight Time | Australia | UTC + 9 hours |
| WEDT | Western European Daylight Time | Europe | UTC + 1 hour |
| WEST | Western European Summer Time | Europe | UTC + 1 hour |
| WET | Western European Time | Europe | UTC |
| WST | Western Summer Time | Australia | UTC + 9 hours |
| WST | Western Standard Time | Australia | UTC + 8 hours |
| X | X-ray Time Zone | Military | UTC – 11 hours |
| Y | Yankee Time Zone | Military | UTC – 12 hours |
| Z | Zulu Time Zone | Military | UTC |
The daylight decrease during the winter is due to Earth’s axial tilt of 23 degrees. If the Earth was not tilted on its axis, the length of day and night would remain steady year long. During winter in the northern hemisphere, there are fewer daylight hours, and the southern hemisphere, in turn, has longer daylight hours and experiences summer.
The main purpose of Daylight Saving Time (called “Summer Time” in many places in the world) is to make better use of daylight. In Ireland, we advance our clocks forward by one hour in Spring to maximize daylight for the summer months. This has the effect of moving an hour of daylight from the morning to the evening. In winter, the clocks are changed back by one hour to maximize daylight during the morning hours.
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