Time zone abbreviations can be confusing, especially when dealing with daylight saving time (DST) or international time zones. The following list provides a comprehensive guide to time zone abbreviations, their corresponding time zone names, and offsets.
| 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 |