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