| Trieste Harrison Hot Springs | Pacific Time | 09:00 |
| Trieste Harrison | Central Time | 07:00 |
| Trieste Harwich | Eastern Time | 06:00 |
| Trieste Harrodsburg | Eastern Time | 06:00 |
| Trieste Harrow | United Kingdom Time | 01:00 |
| Trieste Hartsdale | Eastern Time | 06:00 |
| Trieste Hartselle | Central Time | 07:00 |
| Trieste Hartshorne | Central Time | 07:00 |
| Trieste Hartsville | Eastern Time | 06:00 |
| Trieste Hartville | Eastern Time | 06:00 |
| Trieste Harfleur | Central European Time | 00:00 |
| Trieste Hardys Bay | Eastern Australia Time | -10:00 |
| Trieste Harburg | Central European Time | 00:00 |
| Trieste Hanwood | Eastern Australia Time | -10:00 |
| Trieste Hanumanbari | India Standard Time | -04:30 |
| Trieste Happy Valley | Pacific Time | 09:00 |
| Trieste Hanover | Eastern Time | 06:00 |
| Trieste Hang Dong | Indochina Time | -06:00 |
| Trieste Handsworth Wood | United Kingdom Time | 01:00 |
| Trieste Handforth | United Kingdom Time | 01:00 |
| Trieste Hanamkonda | India Standard Time | -04:30 |
| Trieste Hanau | Central European Time | 00:00 |
| Trieste Hamilton | Eastern Australia Time | -10:00 |
| Trieste Hämeenkyrö | Eastern European Time | -01:00 |
| Trieste Hamilton Township | Eastern Time | 06:00 |
| Trieste Hammerfest | Central European Time | 00:00 |
| Trieste Hammersbach | Central European Time | 00:00 |
| Trieste Hampton | Eastern Australia Time | -10:00 |
| Trieste Hammonton | Eastern Time | 06:00 |
| Trieste Hampi | India Standard Time | -04:30 |
| Trieste Hammamet Sud | Central European Time | 00:00 |
| Trieste Hammamet | Central European Time | 00:00 |
| Trieste Halli | Eastern European Time | -01:00 |
| Trieste Hallsville | Central Time | 07:00 |
| Trieste Hallam | Eastern Australia Time | -10:00 |
| Trieste Halifax | Eastern Time | 06:00 |
| Trieste Halton Hills | Eastern Time | 06:00 |
| Trieste Hamburg | Central European Time | 00:00 |
| Trieste Hadleigh | United Kingdom Time | 01:00 |
| Trieste Hagenow | Central European Time | 00:00 |
| Trieste Hagenthal-le-Haut | Central European Time | 00:00 |
| Trieste Hahndorf | Central Australia Time | -09:30 |
| Trieste HaGoshrim | Israel Time | -01:00 |
| Trieste Haiku-Pauwela | Hawaii-Aleutian Time | 11:00 |
| Trieste Haleiwa | Hawaii-Aleutian Time | 11:00 |
| Trieste Hales Corners | Central Time | 07:00 |
| Trieste Half Moon Bay | Pacific Time | 09:00 |
| Trieste Haldensleben | Central European Time | 00:00 |
| Trieste Hakone | Japan Time | -08:00 |
| Trieste Hakata Ward | Japan Time | -08:00 |