| Udon Thani Einsiedeln | Central European Time | 05:00 |
| Udon Thani Saint-Jean-de-l'Île-d'Orléans | Eastern Time | 11:00 |
| Udon Thani Ejido del Centro | Central Time | 12:00 |
| Udon Thani Saint-Jean-de-Luz | Central European Time | 05:00 |
| Udon Thani Ekerö | Central European Time | 05:00 |
| Udon Thani Saint John | Central Time | 12:00 |
| Udon Thani Ekeröd | Central European Time | 05:00 |
| Udon Thani Eisfeld | Central European Time | 05:00 |
| Udon Thani Eisleben | Central European Time | 05:00 |
| Udon Thani Giessen | Central European Time | 05:00 |
| Udon Thani Gibsons | Pacific Time | 14:00 |
| Udon Thani Giaveno | Central European Time | 05:00 |
| Udon Thani Giardini Naxos | Central European Time | 05:00 |
| Udon Thani Ginosar | Israel Time | 04:00 |
| Udon Thani Gilze | Central European Time | 05:00 |
| Udon Thani Gillitts | South Africa Standard Time | 05:00 |
| Udon Thani Gilmer | Central Time | 12:00 |
| Udon Thani Gilcrux | United Kingdom Time | 06:00 |
| Udon Thani Gig Harbor | Pacific Time | 14:00 |
| Udon Thani Hakata Ward | Japan Time | -02:00 |
| Udon Thani Hakone | Japan Time | -02:00 |
| Udon Thani Gisborne | Eastern Australia Time | -03:00 |
| Udon Thani Girraween | Eastern Australia Time | -03:00 |
| Udon Thani Forrestfield | Western Australia Time | -01:00 |
| Udon Thani Forreston | Central Time | 12:00 |
| Udon Thani Forsyth | Eastern Time | 11:00 |
| Udon Thani Gernsheim | Central European Time | 05:00 |
| Udon Thani Germiston | South Africa Standard Time | 05:00 |
| Udon Thani Fort Atkinson | Central Time | 12:00 |
| Udon Thani Fort Bliss | Mountain Time | 13:00 |
| Udon Thani Gerringong | Eastern Australia Time | -03:00 |
| Udon Thani Gettysburg | Eastern Time | 11:00 |
| Udon Thani Ghisoni | Central European Time | 05:00 |
| Udon Thani Ghent | Central European Time | 05:00 |
| Udon Thani Ghent | Central European Time | 05:00 |
| Udon Thani Gharuan | India Standard Time | 01:30 |
| Udon Thani Ghan | Central Australia Time | -02:30 |
| Udon Thani Ghanoli | India Standard Time | 01:30 |