| Gas City Ifran | Western European Time | -06:00 |
| Gas City Idlib | Eastern European Time | -07:00 |
| Gas City Idukki Township | India Standard Time | -10:30 |
| Gas City Idyllwild-Pine Cove | Pacific Time | 03:00 |
| Gas City Ichikawa | Japan Time | -14:00 |
| Gas City Idar | India Standard Time | -10:30 |
| Gas City Idalia | Eastern Australia Time | -15:00 |
| Gas City Illueca | Central European Time | -06:00 |
| Gas City Ilavala Hobli | India Standard Time | -10:30 |
| Gas City Ileret | East Africa Time | -08:00 |
| Gas City Iligan City | Philippine Time | -13:00 |
| Gas City Ilford | United Kingdom Time | -05:00 |
| Gas City Ilfracombe | United Kingdom Time | -05:00 |
| Gas City Ikšķile | Eastern European Time | -07:00 |
| Gas City Humboldt | Central Time | 01:00 |
| Gas City Hunter River | Atlantic Time | -01:00 |
| Gas City Hulshout | Central European Time | -06:00 |
| Gas City Hultsfred | Central European Time | -06:00 |
| Gas City Hulu Langat | Malaysia Time | -13:00 |
| Gas City Huixquilucan de Degollado | Central Time | 01:00 |
| Gas City Hudson | Eastern Time | 00:00 |
| Gas City Hudson Oaks | Central Time | 01:00 |
| Gas City Hubali-Dharwad | India Standard Time | -10:30 |
| Gas City Huez | Central European Time | -06:00 |
| Gas City Hudsonville | Eastern Time | 00:00 |
| Gas City Huehuetoca | Central Time | 01:00 |
| Gas City Hyde Park | Eastern Australia Time | -15:00 |
| Gas City Hyderabad | India Standard Time | -10:30 |
| Gas City Hyderabad | India Standard Time | -10:30 |
| Gas City Hyderabad | India Standard Time | -10:30 |
| Gas City Hyderabad | India Standard Time | -10:30 |
| Gas City Huntingdale | Western Australia Time | -13:00 |
| Gas City Huttons Ambo | United Kingdom Time | -05:00 |
| Gas City Huskisson | Eastern Australia Time | -16:00 |
| Gas City Húsavík | Greenwich Mean Time | -05:00 |
| Gas City Husborne Crawley | United Kingdom Time | -05:00 |
| Gas City Hurstville | Eastern Australia Time | -16:00 |
| Gas City Hurricane | Mountain Time | 02:00 |