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