| Trieste Higashihiroshima | Japan Time | -08:00 |
| Trieste Hidalgo | Central Time | 07:00 |
| Trieste Hillsville | Eastern Time | 06:00 |
| Trieste Hilmar | Pacific Time | 09:00 |
| Trieste Hill City | Mountain Time | 08:00 |
| Trieste Hillarys | Western Australia Time | -07:00 |
| Trieste Hijrat Al Harah | Arabian Time | -02:00 |
| Trieste Hikkaduwa | India Standard Time | -04:30 |
| Trieste Highland Heights | Eastern Time | 06:00 |
| Trieste Highnam | United Kingdom Time | 01:00 |
| Trieste Highton | Eastern Australia Time | -10:00 |
| Trieste Hérémence | Central European Time | 00:00 |
| Trieste Heringsdorf | Central European Time | 00:00 |
| Trieste Henrico | Eastern Time | 06:00 |
| Trieste Hepburn Springs | Eastern Australia Time | -10:00 |
| Trieste Hephzibah | Eastern Time | 06:00 |
| Trieste Henndorf am Wallersee | Central European Time | 00:00 |
| Trieste Herodsfoot | United Kingdom Time | 01:00 |
| Trieste Hessle | United Kingdom Time | 01:00 |
| Trieste Herve | Central European Time | 00:00 |
| Trieste Herrin | Central Time | 07:00 |
| Trieste Hershey | Eastern Time | 06:00 |
| Trieste Herrera de Pisuerga | Central European Time | 00:00 |
| Trieste Heguri | Japan Time | -08:00 |
| Trieste Heftziba | Israel Time | -01:00 |
| Trieste Heidenheim | Central European Time | 00:00 |
| Trieste Heimenkirch | Central European Time | 00:00 |
| Trieste Hendersonville | Eastern Time | 06:00 |
| Trieste Hemmadi | India Standard Time | -04:30 |
| Trieste Helen | Eastern Time | 06:00 |
| Trieste Helmsley | United Kingdom Time | 01:00 |
| Trieste Haymarket | Eastern Australia Time | -10:00 |
| Trieste Haymarket | Eastern Time | 06:00 |
| Trieste Hayti | Central Time | 07:00 |
| Trieste Hazelwood Park | Central Australia Time | -09:30 |
| Trieste Hazlehurst | Eastern Time | 06:00 |
| Trieste Headingley | Central Time | 07:00 |
| Trieste Headland | Central Time | 07:00 |
| Trieste Healdsburg | Pacific Time | 09:00 |
| Trieste Hebden Bridge | United Kingdom Time | 01:00 |
| Trieste Heber Springs | Central Time | 07:00 |
| Trieste Heath | Central Time | 07:00 |
| Trieste Heathmont | Eastern Australia Time | -10:00 |
| Trieste Heathridge | Western Australia Time | -07:00 |
| Trieste Hayden | Pacific Time | 09:00 |
| Trieste Hawthorn | Eastern Australia Time | -10:00 |
| Trieste Hawthorn East | Eastern Australia Time | -10:00 |
| Trieste Hawaiian Paradise Park | Hawaii-Aleutian Time | 11:00 |
| Trieste Hawera | New Zealand Time | -12:00 |
| Trieste Hawes | United Kingdom Time | 01:00 |