| Code | Definition | GMT |
| ACDT | Australian Central Daylight Time | +10:30 |
| ACIT | Ashmore and Cartier Islands Time | +8:00 |
| ACST | Australian Central Standard Time | +9:30 |
| ACT | Acre Time | -5 |
| ACWST | Australian Central Western Standard Time | +8:45 |
| ADT | Arabia Daylight Time | +4 |
| ADT | Atlantic Daylight Time | -3 |
| AEDT | Australian Eastern Daylight Time | +11 |
| AEST | Australian Eastern Standard Time | +10 |
| AFT | Afghanistan Time | +4:30 |
| AKDT | Alaska Daylight Time | -8 |
| AKST | Alaska Standard Time | -9 |
| AMDT | Armenia Daylight Time | +5 |
| AMST | Armenia Standard Time | +4 |
| ANAST | Anadyr’ Summer Time | +13 |
| ANAT | Anadyr’ Time | +12 |
| APO | Apo Island Time | +8:15 |
| ARDT | Argentina Daylight Time | -2 |
| ART | Argentina Time | -3 |
| AST | Al Manamah Standard Time | +3 |
| AST | Arabia Standard Time | +3 |
| AST | Arabic Standard Time | +3 |
| AST | Atlantic Standard Time | -4 |
| AWST | Australian Western Standard Time | +8 |
| AZODT | Azores Daylight Time | 0 |
| AZOST | Azores Standard Time | -1 |
| AZST | Azerbaijan Summer Time | +5 |
| AZT | Azerbaijan Time | +4 |
| BIT | Baker Island Time | -12 |
| BDT | Bangladesh Standard Time | +7 |
| BEST | Brazil Eastern Standard Time | -2 |
| BDT | Brunei Time | +8 |
| BIOT | British Indian Ocean Time | +6 |
| BOT | Bolivia Time | -4 |
| BRST | Brazilia Summer Time | -2 |
| BRT | Brazilia Time | -3 |
| BST | British Summer Time | +1 |
| BTT | Bhutan Time | 6 |
| BWDT | Brazil Western Daylight Time | -3 |
| BWST | Brazil Western Standard Time | -4 |
| CAST | Chinese Antarctic Standard Time | +5 |
| CAT | Central Africa Time | +2 |
| CCT | Cocos Islands Time | +6:30 |
| CDT | Central Daylight Time | -5 |
| CEST | Central Europe Summer Time | +2 |
| CET | Central Europe Time | +1 |
| CGST | Central Greenland Summer Time | -2 |
| CGT | Central Greenland Time | -3 |
| CHADT | Chatham Island Daylight Time | +13:45 |
| CHAST | Chatham Island Standard Time | +12:45 |
| ChST | Chamorro Standard Time | +10 |
| CIST | Clipperton Island Standard Time | -8 |
| CKT | Cook Island Time | -10 |
| CLDT | Chile Daylight Time | -3 |
| CLST | Chile Standard Time | -4 |
| COT | Colombia Time | -5 |
| CST | Central Standard Time | -6 |
| CST | China Standard Time | +8 |
| CVT | Cape Verde Time | -1 |
| CXT | Christmas Island Time | +7 |
| DAVT | Davis Time | +5 |
| DTAT | District de Terre Adélie Time | +10 |
| EADT | Easter Island Daylight Time | -5 |
| EAST | Easter Island Standard Time | -6 |
| EAT | East Africa Time | +3 |
| ECT | Ecuador Time | -5 |
| EDT | Eastern Daylight Time | -4 |
| EEST | Eastern Europe Summer Time | +3 |
| EET | Eastern Europe Time | +2 |
| EGT | Eastern Greenland Time | -1 |
| EGST | Eastern Greenland Summer Time | 0 |
| EKST | East Kazakhstan Standard Time | +6 |
| EST | Eastern Standard Time | -5 |
| FJDT | Fiji Daylight Time | +13 |
| FJT | Fiji Time | 12 |
| FKDT | Falkland Island Daylight Time | -3 |
| FKST | Falkland Island Standard Time | -4 |
| GALT | Galapagos Time | -6 |
| GET | Georgia Standard Time | +4 |
| GFT | French Guiana Time | -3 |
| GILT | Gilbert Island Time | +12 |
| GIT | Gambier Island Time | -9 |
| GMT | Greenwich Meantime | 0 |
| GST | Gulf Standard Time | +4 |
| GST | South Georgia and the South Sandwich Islands | -2 |
| GYT | Guyana Time | -4 |
| HADT | Hawaii - Aleutian Daylight Time | -9 |
| HAST | Hawaii - Aleutian Standard Time | -10 |
| HKST | Hong Kong Standard Time | +8 |
| HMT | Heard and McDonald Islands Time | +5 |
| ICT | Îles Crozet Time | +4 |
| ICT | Indochina Time | +7 |
| IDT | Ireland Daylight Time | +1 |
| IDT | Israel Daylight Time | +3 |
| IRDT | Îran Daylight Time | +4:30 |
| IRKST | Irkutsk Summer Time | +9 |
| IRKT | Irkutsk Time | +8 |
| IRST | Îran Standard Time | +3:30 |
| IST | Indian Standard Time | +5:30 |
| IST | Ireland Standard Time | 0 |
| IST | Israel Standard Time | +2 |
| JFDT | Juan Fernandez Islands Daylight Time | -3 |
| JFST | Juan Fernandez Islands Standard Time | -4 |
| JST | Japan Standard Time | +9 |
| KGST | Kyrgyzstan Summer Time | +6 |
| KGT | Kyrgyzstan Time | +5 |
| KRAST | Krasnoyarsk Summer Time | +8 |
| KRAT | Krasnoyarsk Time | +7 |
| KOST | Kosrae Standard Time | +11 |
| KOVT | Khovd Time | +7 |
| KOVST | Khovd Summer Time | +8 |
| KST | Korea Standard Time | +9 |
| LHDT | Lord Howe Daylight Time | +11 |
| LHST | Lord Howe Standard Time | +10:30 |
| LINT | Line Island Time | +14 |
| LKT | Sri Lanka Time | +6 |
| MAGST | Magadan Island Summer Time | +12 |
| MAGT | Magadan Island Time | 11 |
| MAWT | Mawson Time | +5 |
| MBT | Macclesfield Bank Time | 8 |
| MDT | Mountain Daylight Time | -6 |
| MIT | Marquesas Islands Time | #VALUE! |
| MHT | Marshall Islands Time | +12 |
| MMT | Myanmar Time | +6:30 |
| MNT | Mongolia Time | +8 |
| MNST | Mongolia Summer Time | +9 |
| MSD | Moscow Summer Time | +4 |
| MSK | Moscow Standard Time | +3 |
| MST | Mountain Standard Time | -7 |
| MUT | Mauritius Time | +4 |
| MVT | Maldives Time | +5 |
| MYT | Malaysia Time | +8 |
| NCT | New Caledonia Time | +11 |
| NDT | Newfoundland Daylight Time | #VALUE! |
| NFT | Norfolk Time | +11:30 |
| NPT | Nepal Time | +5:45 |
| NRT | Nauru Time | +12 |
| NOVST | Novosibirsk Summer Time | +7 |
| NOVT | Novosibirsk Time | +6 |
| NST | Newfoundland Standard Time | #VALUE! |
| NUT | Niue Time | -11 |
| NZDT | New Zealand Daylight Time | +13 |
| NZST | New Zealand Standard Time | +12 |
| OMSK | Omsk Summer Time | +7 |
| OMST | Omsk Standard Time | +6 |
| PDT | Pacific Daylight Time | -7 |
| PETST | Petropavlovsk Summer Time | +13 |
| PET | Peru Time | -5 |
| PETT | Petropavlovsk Time | +12 |
| PGT | Papua New Guinea Time | +10 |
| PHOT | Phoenix Island Time | +13 |
| PHT | Philippines Time | +8 |
| PIT | Paracel Islands Time | +8 |
| PIT | Peter Island Time | -6 |
| PIT | Pratas Islands | +8 |
| PKT | Pakistan Time | +5 |
| PKST | Pakistan Summer Time | +6 |
| PMDT | Pierre & Miquelon Daylight Time | -2 |
| PMST | Pierre & Miquelon Standard Time | -3 |
| PONT | Pohnpei Standard Time | +11 |
| PST | Pacific Standard Time | -8 |
| PST | Pitcairn Standard Time | -8 |
| PWT | Palau Time | +9 |
| PYST | Paraguay Summer Time | -3 |
| PYT | Paraguay Time | -4 |
| RET | Réunion Time | +4 |
| ROTT | Rothera Time | -3 |
| SAMST | Samara Summer Time | +5 |
| SAMT | Samara Time | +4 |
| SAST | South Africa Standard Time | +2 |
| SBT | Solomon Island Time | +11 |
| SCDT | Santa Claus Delivery Time | +13 |
| SCST | Santa Claus Standard Time | +12 |
| SCT | Seychelles Time | +4 |
| SGT | Singapore Time | +8 |
| SIT | Spratly Islands Time | +8 |
| SLT | San Luis Time | -4 |
| SLT | Sierra Leone Time | 0 |
| SLST | San Luis Summer Time | -3 |
| SRT | Suriname Time | -3 |
| SDT | Samoa Daylight Time | -10 |
| SST | Samoa Standard Time | -11 |
| SST | Scarborough Shoal Time | +8 |
| SYST | Syrian Summer Time | +3 |
| SYT | Syrian Standard Time | +2 |
| TAHT | Tahiti Time | -10 |
| TFT | French Southern and Antarctic Time | +5 |
| TJT | Tajikistan Time | +5 |
| TKT | Tokelau Time | -10 |
| TMT | Turkmenistan Time | +5 |
| TOT | Tonga Time | +13 |
| TPT | East Timor Time | +9 |
| TRUT | Truk Time | +10 |
| TVT | Tuvalu Time | +12 |
| TWT | Taiwan Time | +8 |
| UST | Urumqi Standard Time | +6 |
| UTC | Universal Coordinated Time | 0 |
| UYT | Uruguay Standard Time | -3 |
| UYST | Uruguay Summer Time | -2 |
| UZT | Uzbekistan Time | +5 |
| VLAST | Vladivostok Summer Time | +11 |
| VLAT | Vladivostok Time | +10 |
| VOST | Vostok Time | +6 |
| VST | Venezuela Standard Time | #VALUE! |
| VUT | Vanuatu Time | +11 |
| WAST | Western Africa Summer Time | +2 |
| WAT | Western Africa Time | +1 |
| WEST | Western Europe Summer Time | +1 |
| WET | Western Europe Time | 0 |
| WFT | Wallis and Futuna Time | +12 |
| WIB | Waktu Indonesia Bagian Barat | +7 |
| WIT | Waktu Indonesia Bagian Timur | +9 |
| WITA | Waktu Indonesia Bagian Tengah | +8 |
| WKST | West Kazakhstan Standard Time | +5 |
| YAKST | Yakutsk Summer Time | +10 |
| YAKT | Yakutsk Time | +9 |
| YAPT | Yap Time | +10 |
| YEKST | Yekaterinburg Summer Time | +6 |
| YEKT | Yekaterinburg Time | +5 |
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