| Thera Hainesport | Eastern Time | 07:00 |
| Thera Gutach | Central European Time | 01:00 |
| Thera Gustine | Pacific Time | 10:00 |
| Thera Guthrie | Central Time | 08:00 |
| Thera Gwoździany | Central European Time | 01:00 |
| Thera Gymea | Eastern Australia Time | -09:00 |
| Thera Gympie | Eastern Australia Time | -08:00 |
| Thera Gyeongju-si | Korean Time | -07:00 |
| Thera Gzira | Central European Time | 01:00 |
| Thera Habarakada | India Standard Time | -03:30 |
| Thera Hackettstown | Eastern Time | 07:00 |
| Thera Gulf Breeze | Central Time | 08:00 |
| Thera Gulf Shores | Central Time | 08:00 |
| Thera Gum Spring | Eastern Time | 07:00 |
| Thera Gura Râului | Eastern European Time | 00:00 |
| Thera Gurdaspur | India Standard Time | -03:30 |
| Thera Gun Barrel City | Central Time | 08:00 |
| Thera Guniyal Gaon | India Standard Time | -03:30 |
| Thera Guntersville | Central Time | 08:00 |
| Thera Gualala | Pacific Time | 10:00 |
| Thera Guanica | Atlantic Time | 06:00 |
| Thera Guar Chempedak | Malaysia Time | -06:00 |
| Thera Grüningen | Central European Time | 01:00 |
| Thera Guadalupe | Central Time | 08:00 |
| Thera Grover Beach | Pacific Time | 10:00 |
| Thera Gruissan | Central European Time | 01:00 |
| Thera Groton | Eastern Time | 07:00 |
| Thera Grottammare | Central European Time | 01:00 |
| Thera Guerneville | Pacific Time | 10:00 |
| Thera Guildford | Eastern Australia Time | -09:00 |
| Thera Guardiagrele | Central European Time | 01:00 |
| Thera Guarne | Colombia Time | 07:00 |
| Thera Guatapé | Colombia Time | 07:00 |
| Thera Gudalur | India Standard Time | -03:30 |
| Thera Guayana City | Venezuela Time | 06:00 |
| Thera Horsley | Eastern Australia Time | -09:00 |
| Thera Horseheads | Eastern Time | 07:00 |
| Thera Hoshiarpur | India Standard Time | -03:30 |
| Thera Horebeke | Central European Time | 01:00 |
| Thera Hopland | Pacific Time | 10:00 |
| Thera Horní Věstonice | Central European Time | 01:00 |
| Thera Horning | United Kingdom Time | 02:00 |
| Thera Hope | Central Time | 08:00 |
| Thera Hope | Pacific Time | 10:00 |
| Thera Hope Island | Eastern Australia Time | -08:00 |
| Thera Hooksett | Eastern Time | 07:00 |
| Thera Honnihalli | India Standard Time | -03:30 |
| Thera Honiton | United Kingdom Time | 02:00 |
| Thera Honesdale | Eastern Time | 07:00 |
| Thera Honfleur | Central European Time | 01:00 |