| Yamagata Hainesport | Eastern Time | 14:00 |
| Yamagata Gutach | Central European Time | 08:00 |
| Yamagata Gustine | Pacific Time | 17:00 |
| Yamagata Guthrie | Central Time | 15:00 |
| Yamagata Gwoździany | Central European Time | 08:00 |
| Yamagata Gymea | Eastern Australia Time | -02:00 |
| Yamagata Gympie | Eastern Australia Time | -01:00 |
| Yamagata Gyeongju-si | Korean Time | 00:00 |
| Yamagata Gzira | Central European Time | 08:00 |
| Yamagata Habarakada | India Standard Time | 03:30 |
| Yamagata Hackettstown | Eastern Time | 14:00 |
| Yamagata Gulf Breeze | Central Time | 15:00 |
| Yamagata Gulf Shores | Central Time | 15:00 |
| Yamagata Gum Spring | Eastern Time | 14:00 |
| Yamagata Gura Râului | Eastern European Time | 07:00 |
| Yamagata Gurdaspur | India Standard Time | 03:30 |
| Yamagata Gun Barrel City | Central Time | 15:00 |
| Yamagata Guniyal Gaon | India Standard Time | 03:30 |
| Yamagata Guntersville | Central Time | 15:00 |
| Yamagata Gualala | Pacific Time | 17:00 |
| Yamagata Guanica | Atlantic Time | 13:00 |
| Yamagata Guar Chempedak | Malaysia Time | 01:00 |
| Yamagata Grüningen | Central European Time | 08:00 |
| Yamagata Guadalupe | Central Time | 15:00 |
| Yamagata Grover Beach | Pacific Time | 17:00 |
| Yamagata Gruissan | Central European Time | 08:00 |
| Yamagata Groton | Eastern Time | 14:00 |
| Yamagata Grottammare | Central European Time | 08:00 |
| Yamagata Guerneville | Pacific Time | 17:00 |
| Yamagata Guildford | Eastern Australia Time | -02:00 |
| Yamagata Guardiagrele | Central European Time | 08:00 |
| Yamagata Guarne | Colombia Time | 14:00 |
| Yamagata Guatapé | Colombia Time | 14:00 |
| Yamagata Gudalur | India Standard Time | 03:30 |
| Yamagata Guayana City | Venezuela Time | 13:00 |
| Yamagata Horsley | Eastern Australia Time | -02:00 |
| Yamagata Horseheads | Eastern Time | 14:00 |
| Yamagata Hoshiarpur | India Standard Time | 03:30 |
| Yamagata Horebeke | Central European Time | 08:00 |
| Yamagata Hopland | Pacific Time | 17:00 |
| Yamagata Horní Věstonice | Central European Time | 08:00 |
| Yamagata Horning | United Kingdom Time | 09:00 |
| Yamagata Hope | Central Time | 15:00 |
| Yamagata Hope | Pacific Time | 17:00 |
| Yamagata Hope Island | Eastern Australia Time | -01:00 |
| Yamagata Hooksett | Eastern Time | 14:00 |
| Yamagata Honnihalli | India Standard Time | 03:30 |
| Yamagata Honiton | United Kingdom Time | 09:00 |
| Yamagata Honesdale | Eastern Time | 14:00 |
| Yamagata Honfleur | Central European Time | 08:00 |