| Seixal Ifran | Western European Time | -01:00 |
| Seixal Idlib | Eastern European Time | -02:00 |
| Seixal Idukki Township | India Standard Time | -05:30 |
| Seixal Idyllwild-Pine Cove | Pacific Time | 08:00 |
| Seixal Ichikawa | Japan Time | -09:00 |
| Seixal Idar | India Standard Time | -05:30 |
| Seixal Idalia | Eastern Australia Time | -10:00 |
| Seixal Illueca | Central European Time | -01:00 |
| Seixal Ilavala Hobli | India Standard Time | -05:30 |
| Seixal Ileret | East Africa Time | -03:00 |
| Seixal Iligan City | Philippine Time | -08:00 |
| Seixal Ilford | United Kingdom Time | 00:00 |
| Seixal Ilfracombe | United Kingdom Time | 00:00 |
| Seixal Ikšķile | Eastern European Time | -02:00 |
| Seixal Humboldt | Central Time | 06:00 |
| Seixal Hunter River | Atlantic Time | 04:00 |
| Seixal Hulshout | Central European Time | -01:00 |
| Seixal Hultsfred | Central European Time | -01:00 |
| Seixal Hulu Langat | Malaysia Time | -08:00 |
| Seixal Huixquilucan de Degollado | Central Time | 06:00 |
| Seixal Hudson | Eastern Time | 05:00 |
| Seixal Hudson Oaks | Central Time | 06:00 |
| Seixal Hubali-Dharwad | India Standard Time | -05:30 |
| Seixal Huez | Central European Time | -01:00 |
| Seixal Hudsonville | Eastern Time | 05:00 |
| Seixal Huehuetoca | Central Time | 06:00 |
| Seixal Hyde Park | Eastern Australia Time | -10:00 |
| Seixal Hyderabad | India Standard Time | -05:30 |
| Seixal Hyderabad | India Standard Time | -05:30 |
| Seixal Hyderabad | India Standard Time | -05:30 |
| Seixal Hyderabad | India Standard Time | -05:30 |
| Seixal Huntingdale | Western Australia Time | -08:00 |
| Seixal Huttons Ambo | United Kingdom Time | 00:00 |
| Seixal Huskisson | Eastern Australia Time | -11:00 |
| Seixal Húsavík | Greenwich Mean Time | 00:00 |
| Seixal Husborne Crawley | United Kingdom Time | 00:00 |
| Seixal Hurstville | Eastern Australia Time | -11:00 |
| Seixal Hurricane | Mountain Time | 07:00 |