UTC e' l'abbreviazione di 'Coordinated Universal Time', piu' conosciuto come 'Greenwich Mean Time' (GMT).
| Ore | Longitudine | Minuti | Regione |
| UTC -12:00 | W180º | -720 | International Date Line West |
| UTC -11:00 | W165º | -680 | Midway Islands, Samoa, Niue, Pago Pago |
| UTC -10:00 | W150º | -600 | Fakaofo, Hawaii, Rarotonga, Tahiti |
| UTC -9:30 | W142.5º | -570 | Marquesas |
| UTC -9:00 | W135º | -540 | Alaska, Gambier |
| UTC -8:00 | W120º | -480 | Pacific Time Los Angeles, San Fransico, Seattle, Vancouver |
| UTC -7:00 | W105º | -420 | Mountain Time Arizona |
| UTC -6:00 | W90º | -360 | Central Time New Orleans, Chicago, Central America, Mexico City |
| UTC -5:00 | W75º | -300 | Eastern Time Toronto, Florida, New York, Havanna, Lima, Quito |
| UTC -4:30 | W67.5º | -270 | Caracas |
| UTC -4:00 | W60º | -240 | Atlantic Time Antiqua, Aruba, Barbados, Bermuda, Santo Domingo, Tortola |
| UTC -3:00 | W45º | -180 | Rio de Janeiro, Buenos Aires, Newfoundland, Montevideo, Sao Paulo |
| UTC -2:00 | W30º | -120 | Mid-Atlantic Noronha, South Georgia |
| UTC -1:00 | W15º | -60 | Azores, Cape Verde |
| UTC 0:00 | 0º | 0 | London, Lisbon, Dublin, Canary Islands, Casablanca, Reykjavik |
| UTC +1:00 | E15º | +60 | Central European Time Amsterdam, Zurich, Roma, Paris, Barcelona, Monaco |
| UTC +2:00 | E30º | +120 | Athens, Istanbul, Cairo, Cape Town |
| UTC +3:00 | E45º | +180 | Bagdad, Bahrain, Kuwait, Moscow |
| UTC +4:00 | E60º | +240 | Abu Dhabi, Muscat, Baku, Yerevan, Seychelles |
| UTC +5:00 | E75º | +300 | Karachi, Islamabad, Ekateringburg, Maldives |
| UTC +5:30 | E82.5º | +330 | India Standard Time Colombo |
| UTC +6:00 | E90º | +360 | Astana, Dhaka |
| UTC +7:00 | E105º | +420 | Bangkok, Hanoi, Jakarta, Krasnoyarsk, Bali |
| UTC +8:00 | E120º | +480 | Western Time Beijing, Hong Kong, Kuala Lumpur, Singapore, Perth, Taipei, Manila |
| UTC +9:00 | E135º | +540 | Osaka, Tokyo, Seoul, Sapporo, Yakutsk |
| UTC +9:30 | E142.5º | +570 | Central Time Darwin, Adelaide |
| UTC +10:00 | E150º | +600 | Eastern Time Sydney, Melbourne, Canberra, Brisbane, Cairns, Guam, Port Moresby |
| UTC +11:00 | E165º | +660 | Magadan, Solomon Is., New Caledonia |
| UTC +12:00 | E180º | +720 | Auckland, Wellington, Fiji, Marshall Island |
| UTC +13:00 | W165º | +780 | Nuku'alofa |