| Zone ID | Offset | Name | DST Offset | DST Name |
| UTC | GMT+00:00 | Universal Coordinated Time | | |
| CEST | GMT+01:00 | Central Europe Standard Time | | |
| CET | GMT+01:00 | Central Europe Time | DST GMT+02:00 | Central Europe Summer Time |
| WAST | GMT+01:00 | West Africa Standard Time | | |
| WAT | GMT+01:00 | West Africa Time | DST GMT+02:00 | West Africa Summer Time |
| EEST | GMT+02:00 | Eastern Europe Time | | |
| EET | GMT+02:00 | Eastern Europe Standard Time | DST GMT+03:00 | Eastern Europe Summer Time |
| CAT | GMT+02:00 | Central Africa Time | | |
| SAST | GMT+02:00 | South Africa Standard Time | | |
| IsST | GMT+02:00 | Israel Standard Time | DST GMT+03:00 | Israel Daylight Time |
| JEET | GMT+02:00 | Jordan Eastern Europe Time | DST GMT+03:00 | Jordan Eastern Europe Summer Time |
| LEET | GMT+02:00 | Lebanon Eastern Europe Time | DST GMT+03:00 | Lebanon Eastern Europe Summer Time |
| EAT | GMT+03:00 | East Africa Time | | |
| WET | GMT+00:00 | Western Europe Time | | |
| GMT | GMT+00:00 | Greenwich Mean Time | | |
| WEST | GMT+00:00 | Western Europe Standard Time | DST GMT+01:00 | Western Europe Summer Time |
| AFT | GMT+04:30 | Afghanistan Time | | |
| ICT | GMT+07:00 | Indochina Time | | |
| CXT | GMT+07:00 | Christmas Island Time | | |
| HOVT | GMT+07:00 | Hovd Time | | |
| ULAT | GMT+08:00 | Ulaanbaatar Time | | |
| CHOT | GMT+09:00 | Choibalsan Time | | |
| RUKAT | GMT+02:00 | Kaliningrad Time | DST GMT+03:00 | Kaliningrad Summertime |
| RUIRT | GMT+08:00 | Irkutsk Time | DST GMT+09:00 | Irkutsk Summertime |
| RUKRT | GMT+07:00 | Krasnoyarsk Time | DST GMT+08:00 | Krasnoyarsk Summertime |
| RUMAT | GMT+11:00 | Magadan Time | DST GMT+12:00 | Magadan Summertime |
| RUMST | GMT+03:00 | Moscow Time | DST GMT+04:00 | Moscow Daylight Time |
| RUNOT | GMT+06:00 | Novosibirsk Time | DST GMT+07:00 | Novosibirsk Summertime |
| RUPET | GMT+12:00 | Petropavlovsk-Kamchatski Time | DST GMT+13:00 | Petropavlovsk-Kamchatski Summertime |
| RUSAT | GMT+04:00 | Samara Time | DST GMT+05:00 | Samara Summerime |
| RUVLT | GMT+10:00 | Vladivostok Time | DST GMT+11:00 | Vladivostok Summertime |
| RUYAT | GMT+09:00 | Yakutsk Time | DST GMT+10:00 | Yakutsk Summertime |
| RUYET | GMT+05:00 | Yekaterinburg Time | DST GMT+06:00 | Yekaterinburg Summertime |
| RUVOT | GMT+06:00 | Vostok Time | | |
| CNST | GMT+08:00 | China Standard Time | | |
| KOST | GMT+11:00 | Kosrae Standard Time | | |
| PONT | GMT+11:00 | Pohnpei Standard Time | | |
| TRUT | GMT+10:00 | Truk Time | | |
| YAPT | GMT+10:00 | Yap Time | | |
| MHT | GMT+12:00 | Marshall Islands Time | | |
| HST | GMT-10:00 | Hawaii Standard Time | | |
| ChST | GMT+10:00 | Chamorro Standard Time | | |
| NZT | GMT+12:00 | New Zealand Standard Time | DST GMT+13:00 | New Zealand Daylight Time |
| CHT | GMT-04:00 | Chile Time | DST GMT-03:00 | Chile Summertime |
| CHPT | GMT-04:00 | Chile (Palmer) Time | DST GMT-03:00 | Chile Summertime |
| EASST | GMT-06:00 | Easter Island Standard Time | DST GMT-05:00 | Easter Island Daylight Time |
| CHAST | GMT+12:45 | Chatham Standard Time | DST GMT+13:45 | Chatham Daylight Time |
| CKT | GMT-10:00 | Cook Island Time | | |
| NUT | GMT-11:00 | Niue Time | | |
| TKT | GMT-10:00 | Tokelau Time | | |
| ART | GMT-03:00 | Argentine Time | | |
| BOT | GMT-04:00 | Bolivia Time | | |
| BRT | GMT-03:00 | Brasilia Time | | |
| BRST | GMT-03:00 | Brasilia Standard Time | DST GMT-02:00 | Brasilia Daylight Time |
| BAcT | GMT-05:00 | Acre Time | | |
| AMCT | GMT-05:00 | Amazon Central Time | | |
| FNT | GMT-02:00 | Fernando de Noronha Time | | |
| AMT | GMT-04:00 | Amazon Time | | |
| AMWT | GMT-04:00 | Amazon Winter Time | DST GMT-03:00 | Amazon Summer Time |
| COT | GMT-05:00 | Colombia Time | | |
| ECT | GMT-05:00 | Ecuador Time | | |
| GALT | GMT-06:00 | Galapagos Time | | |
| FKST | GMT-04:00 | Falkland Islands Standard Time | DST GMT-03:00 | Falkland Islands Daylight Time |
| GFT | GMT-03:00 | French Guiana Time | | |
| GYT | GMT-04:00 | Guyana Time | | |
| PET | GMT-05:00 | Peru Time | | |
| SRT | GMT-03:00 | Suriname Time | | |
| GSST | GMT-02:00 | South Georgia Time | | |
| UYT | GMT-03:00 | Uruguay Time | | |
| VET | GMT-04:00 | Venezuela Time | | |
| PYT | GMT-04:00 | Paraguay Time | DST GMT-03:00 | Paraguay Daylight Time |
| CVT | GMT-01:00 | Cape Verde Time | | |
| MUT | GMT+04:00 | Mauritius Time | | |
| RET | GMT+04:00 | Reunion Time | | |
| SCT | GMT+04:00 | Seychelles Time | | |
| EGST | GMT+02:00 | Egypt Standard Time | DST GMT+03:00 | Egypt Daylight Time |
| EEGST | GMT+02:00 | East-Egypt Standard Time | DST GMT+03:00 | East-Egypt Daylight Time |
| BAT | GMT+00:00 | British Antarctic Time | DST GMT+01:00 | British Antarctic Summer Time |
| BT | GMT+00:00 | British Time | DST GMT+01:00 | British Summer Time |
| AZOST | GMT-01:00 | Azores Standard Time | DST GMT+00:00 | Azores Daylight Time |
| GEST | GMT+04:00 | Georgia Standard Time | DST GMT+05:00 | Georgia Daylight Time |
| AZST | GMT+04:00 | Azerbaijan Standard Time | DST GMT+05:00 | Azerbaijan Daylight Time |
| AST | GMT-04:00 | Atlantic Standard Time | | |
| AT | GMT-04:00 | Atlantic Time | DST GMT-03:00 | Atlantic Daylight Time |
| EST | GMT-05:00 | Eastern Standard Time | | |
| ET | GMT-05:00 | Eastern Time | DST GMT-04:00 | Eastern Daylight Time |
| CST | GMT-06:00 | Central Standard Time | | |
| CAST | GMT-06:00 | Central America Standard Time | | |
| CT | GMT-06:00 | Central Time | DST GMT-05:00 | Central Daylight Time |
| MST | GMT-07:00 | Mountain Standard Time | | |
| MT | GMT-07:00 | Mountain Time | DST GMT-06:00 | Mountain Daylight Time |
| PST | GMT-08:00 | Pacific Standard Time | | |
| PT | GMT-08:00 | Pacific Time | DST GMT-07:00 | Pacific Daylight Time |
| AKT | GMT-09:00 | Alaska Time | DST GMT-08:00 | Alaska Daylight Time |
| PMT | GMT-03:00 | Pierre and Miquelon Time | DST GMT-02:00 | Pierre and Miquelon Daylight Time |
| HAT | GMT-10:00 | Hawaii-Aleutain Time | DST GMT-09:00 | Hawaii-Aleutain Daylight Time |
| NST | GMT-03:30 | Newfoundland Standard Time | DST GMT-02:30 | Newfoundland Daylight Time |
| MeST | GMT-07:00 | Mexico Standard Time | | |
| MeCT | GMT-06:00 | Mexico Central Time | DST GMT-05:00 | Mexico Central Daylight Time |
| MeMT | GMT-07:00 | Mexico Mountain Time | DST GMT-06:00 | Mexico Mountain Daylight Time |
| MePT | GMT-08:00 | Mexico Pacific Time | DST GMT-07:00 | Mexico Pacific Daylight Time |
| AWT | GMT+08:00 | Australian Western Time | DST GMT+09:00 | Australian Western Daylight Time |
| ACST | GMT+09:30 | Australian Central Standard Time | | |
| ACT | GMT+09:30 | Australian Central Time | DST GMT+10:30 | Australian Central Daylight Time |
| AEST | GMT+10:00 | Australian Eastern Standard Time | | |
| AET | GMT+10:00 | Australian Eastern Time | DST GMT+11:00 | Australian Eastern Daylight Time |
| TET | GMT+10:00 | Tasmania Eastern Time | DST GMT+11:00 | Tasmania Eastern Daylight Time |
| NFT | GMT+11:30 | Norfolk Time | | |
| HMT | GMT+05:00 | Heard and Mc.Donald Time | | |
| CCT | GMT+06:30 | Cocos Islands Time | | |
| LHST | GMT+10:30 | Lord Howe Standard Time | DST GMT+11:00 | Lord Howe Daylight Time |
| DAVT | GMT+07:00 | Davis Time | | |
| DDUT | GMT+10:00 | Dumont-d'Urville Time | | |
| TFT | GMT+05:00 | TF Time | | |
| MAWT | GMT+06:00 | Mawson Time | | |
| SYOT | GMT+03:00 | Syowa Time | | |
| TCT | GMT-05:00 | Turks- and Caicosislands Time | DST GMT-04:00 | Turks- and Caicosislands Daylight Time |
| CUCT | GMT-06:00 | Cuba Central Time | DST GMT-05:00 | Cuba Central Daylight Time |
| AlMST | GMT+03:00 | Al Manamah Standard Time | | |
| AsST | GMT+03:00 | Asian Standard Time | | |
| ArST | GMT+03:00 | Arab Standard Time | | |
| ArT | GMT+03:00 | Arabia Time | DST GMT+04:00 | Arabia Daylight Time |
| IRT | GMT+03:30 | Iran Time | | |
| PKT | GMT+05:00 | Pakistan Time | | |
| SEEST | GMT+02:00 | Syria Time | DST GMT+03:00 | Syria Summer Time |
| KGST | GMT+05:00 | Kyrgyzstan Standard Time | DST GMT+06:00 | Kyrgyzstan Daylight Time |
| GST | GMT+04:00 | Gulf Standard Time | | |
| TMT | GMT+05:00 | Turkmenistan Time | | |
| UZT | GMT+05:00 | Uzbekistan Time | | |
| TJT | GMT+05:00 | Tajikistan Time | | |
| BTT | GMT+06:00 | Bhutan Time | | |
| BDT | GMT+06:00 | Bangladesh Time | | |
| BIOT | GMT+05:00 | British Indian Ocean Time | | |
| BNT | GMT+08:00 | Brunei Time | | |
| MMT | GMT+06:30 | Myanmar Time | | |
| TPT | GMT+09:00 | East Timor Time | | |
| IST | GMT+05:30 | Indian Standard Time | | |
| CIT | GMT+08:00 | Central Indonesia Time | | |
| EIT | GMT+09:00 | East Indonesia Time | | |
| WIT | GMT+07:00 | West Indonesia Time | | |
| JST | GMT+09:00 | Japan Standard Time | | |
| MYT | GMT+08:00 | Malaysia Time | | |
| MVT | GMT+05:00 | Maldives Time | | |
| NPT | GMT+05:45 | Nepal Time | | |
| KST | GMT+09:00 | Korea Standard Time | | |
| PHT | GMT+08:00 | Philippines Time | | |
| SGT | GMT+08:00 | Singapore Time | | |
| LKT | GMT+06:00 | Sri Lanka Time | | |
| TCST | GMT+08:00 | Taiwan Central Standard Time | | |
| WGRT | GMT-03:00 | Western Greenland Time | DST GMT-02:00 | Western Greenland Daylight Time |
| EGRT | GMT-01:00 | Eastern Greenland Time | DST GMT+00:00 | Eastern Greenland Daylight Time |
| CGRT | GMT-02:00 | Central Greenland Time | DST GMT-01:00 | Central Greenland Daylight Time |
| NCT | GMT+11:00 | New Caledonia Time | | |
| VUT | GMT+11:00 | Vanuatu Time | | |
| SBT | GMT+11:00 | Solomon Island Time | | |
| SST | GMT-11:00 | Samoa Standard Time | | |
| FJT | GMT+12:00 | Fiji Time | | |
| NRT | GMT+12:00 | Nauru Time | | |
| TVT | GMT+12:00 | Tuvalu Time | | |
| WFT | GMT+12:00 | Wallis and Futuna Time | | |
| GILT | GMT+12:00 | Gilbert Island Time | | |
| LINT | GMT+14:00 | Line Island Time | | |
| PHOT | GMT+13:00 | Phoenix Island Time | | |
| TOT | GMT+13:00 | Tonga Time | | |
| TAHT | GMT-10:00 | Tahiti Time | | |
| PWT | GMT+09:00 | Palau Time | | |
| PGT | GMT+10:00 | Papua New Guinea Time | | |
| WSaT | GMT-11:00 | Western Samoa Time | | |
| SIT | GMT+08:00 | Spratly Island Time | | |
| WAKT | GMT-12:00 | Wake Time | | |
| GAMT | GMT-09:00 | Gambier Time | | |
| MART | GMT-09:30 | Marquesas Time | | |
| A | GMT+01:00 | (UTC+1:00) Alpha | | |
| B | GMT+02:00 | (UTC+2:00) Bravo | | |
| C | GMT+03:00 | (UTC+3:00) Charlie | | |
| D | GMT+04:00 | (UTC+4:00) Delta | | |
| E | GMT+05:00 | (UTC+5:00) Echo | | |
| F | GMT+06:00 | (UTC+6:00) Foxtrot | | |
| G | GMT+07:00 | (UTC+7:00) Golf | | |
| H | GMT+08:00 | (UTC+8:00) Hotel | | |
| I | GMT+09:00 | (UTC+9:00) India | | |
| K | GMT+10:00 | (UTC+10:00) Kilo | | |
| L | GMT+11:00 | (UTC+11:00) Lima | | |
| M | GMT+12:00 | (UTC+12:00) Mike | | |
| N | GMT-01:00 | (UTC-1:00) November | | |
| O | GMT-02:00 | (UTC-2:00) Oscar | | |
| P | GMT-03:00 | (UTC-3:00) Papa | | |
| Q | GMT-04:00 | (UTC-4:00) Quebec | | |
| R | GMT-05:00 | (UTC-5:00) Romeo | | |
| S | GMT-06:00 | (UTC-6:00) Sierra | | |
| T | GMT-07:00 | (UTC-7:00) Tango | | |
| U | GMT-08:00 | (UTC-8:00) Uniform | | |
| V | GMT-09:00 | (UTC-9:00) Victor | | |
| W | GMT-10:00 | (UTC-10:00) Whiskey | | |
| X | GMT-11:00 | (UTC-11:00) X-ray | | |
| Y | GMT-12:00 | (UTC-12:00) Yankee | | |
| Z | GMT+00:00 | (UTC+0:00) Zulu | | |