| Thoothukudi Higashihiroshima | Japan Time | -03:30 |
| Thoothukudi Hidalgo | Central Time | 11:30 |
| Thoothukudi Hillsville | Eastern Time | 10:30 |
| Thoothukudi Hilmar | Pacific Time | 13:30 |
| Thoothukudi Hill City | Mountain Time | 12:30 |
| Thoothukudi Hillarys | Western Australia Time | -02:30 |
| Thoothukudi Hijrat Al Harah | Arabian Time | 02:30 |
| Thoothukudi Hikkaduwa | India Standard Time | 00:00 |
| Thoothukudi Highland Heights | Eastern Time | 10:30 |
| Thoothukudi Highnam | United Kingdom Time | 05:30 |
| Thoothukudi Highton | Eastern Australia Time | -05:30 |
| Thoothukudi Hérémence | Central European Time | 04:30 |
| Thoothukudi Heringsdorf | Central European Time | 04:30 |
| Thoothukudi Henrico | Eastern Time | 10:30 |
| Thoothukudi Hepburn Springs | Eastern Australia Time | -05:30 |
| Thoothukudi Hephzibah | Eastern Time | 10:30 |
| Thoothukudi Henndorf am Wallersee | Central European Time | 04:30 |
| Thoothukudi Herodsfoot | United Kingdom Time | 05:30 |
| Thoothukudi Hessle | United Kingdom Time | 05:30 |
| Thoothukudi Herve | Central European Time | 04:30 |
| Thoothukudi Herrin | Central Time | 11:30 |
| Thoothukudi Hershey | Eastern Time | 10:30 |
| Thoothukudi Herrera de Pisuerga | Central European Time | 04:30 |
| Thoothukudi Heguri | Japan Time | -03:30 |
| Thoothukudi Heftziba | Israel Time | 03:30 |
| Thoothukudi Heidenheim | Central European Time | 04:30 |
| Thoothukudi Heimenkirch | Central European Time | 04:30 |
| Thoothukudi Hendersonville | Eastern Time | 10:30 |
| Thoothukudi Hemmadi | India Standard Time | 00:00 |
| Thoothukudi Helen | Eastern Time | 10:30 |
| Thoothukudi Helmsley | United Kingdom Time | 05:30 |
| Thoothukudi Haymarket | Eastern Australia Time | -05:30 |
| Thoothukudi Haymarket | Eastern Time | 10:30 |
| Thoothukudi Hayti | Central Time | 11:30 |
| Thoothukudi Hazelwood Park | Central Australia Time | -05:00 |
| Thoothukudi Hazlehurst | Eastern Time | 10:30 |
| Thoothukudi Headingley | Central Time | 11:30 |
| Thoothukudi Headland | Central Time | 11:30 |
| Thoothukudi Healdsburg | Pacific Time | 13:30 |
| Thoothukudi Hebden Bridge | United Kingdom Time | 05:30 |
| Thoothukudi Heber Springs | Central Time | 11:30 |
| Thoothukudi Heath | Central Time | 11:30 |
| Thoothukudi Heathmont | Eastern Australia Time | -05:30 |
| Thoothukudi Heathridge | Western Australia Time | -02:30 |
| Thoothukudi Hayden | Pacific Time | 13:30 |
| Thoothukudi Hawthorn | Eastern Australia Time | -05:30 |
| Thoothukudi Hawthorn East | Eastern Australia Time | -05:30 |
| Thoothukudi Hawaiian Paradise Park | Hawaii-Aleutian Time | 15:30 |
| Thoothukudi Hawera | New Zealand Time | -07:30 |
| Thoothukudi Hawes | United Kingdom Time | 05:30 |