| Fort Irwin Boularderie East | Atlantic Time | -04:00 |
| Fort Irwin Paw Paw | Eastern Time | -03:00 |
| Fort Irwin Palmer | Alaska Time | 01:00 |
| Fort Irwin Crieff | United Kingdom Time | -08:00 |
| Fort Irwin Howrah | India Standard Time | -12:30 |
| Fort Irwin Ariana | Central European Time | -08:00 |
| Fort Irwin Swainsthorpe | United Kingdom Time | -08:00 |
| Fort Irwin Selinsgrove | Eastern Time | -03:00 |
| Fort Irwin Bougtob | Central European Time | -08:00 |
| Fort Irwin Paul | Mountain Time | -01:00 |
| Fort Irwin Palmetto | Eastern Time | -03:00 |
| Fort Irwin Crescent Springs | Eastern Time | -03:00 |
| Fort Irwin Hoxie | Central Time | -02:00 |
| Fort Irwin Argenbühl | Central European Time | -09:00 |
| Fort Irwin Swillington | United Kingdom Time | -08:00 |
| Fort Irwin Selouane | Western European Time | -08:00 |
| Fort Irwin Boumalne Dades | Western European Time | -08:00 |
| Fort Irwin Pathiyavaram | India Standard Time | -12:30 |
| Fort Irwin Palmview | Central Time | -02:00 |
| Fort Irwin Crestview Hills | Eastern Time | -03:00 |
| Fort Irwin Hoylake | United Kingdom Time | -08:00 |
| Fort Irwin Argent-sur-Sauldre | Central European Time | -09:00 |
| Fort Irwin Sydney | Eastern Australia Time | -17:00 |
| Fort Irwin Semaphore | Central Australia Time | -16:30 |
| Fort Irwin Bellbrook | Eastern Time | -03:00 |
| Fort Irwin Patho | Eastern Australia Time | -17:00 |
| Fort Irwin Palmyra | Eastern Time | -03:00 |
| Fort Irwin Cremorne | Eastern Australia Time | -17:00 |
| Fort Irwin Huajuapan de León | Central Time | -02:00 |
| Fort Irwin Ardross | Western Australia Time | -15:00 |
| Fort Irwin Sydney | Eastern Australia Time | -17:00 |
| Fort Irwin Sementina | Central European Time | -09:00 |
| Fort Irwin Bellbrook | Eastern Australia Time | -17:00 |
| Fort Irwin Patterdale | United Kingdom Time | -08:00 |
| Fort Irwin Palmhurst | Central Time | -02:00 |
| Fort Irwin Chianciano Terme | Central European Time | -09:00 |
| Fort Irwin Huanggang | China Time | -15:00 |
| Fort Irwin Ardsley | Eastern Time | -03:00 |
| Fort Irwin Sydney | Eastern Australia Time | -17:00 |
| Fort Irwin Seebara | India Standard Time | -12:30 |
| Fort Irwin Belleair Bluffs | Eastern Time | -03:00 |
| Fort Irwin Pattaya | Indochina Time | -14:00 |
| Fort Irwin Palo Cedro | Pacific Time | 00:00 |
| Fort Irwin Chiang Mai | Indochina Time | -14:00 |
| Fort Irwin Jasper | Central Time | -02:00 |
| Fort Irwin Åre | Central European Time | -09:00 |
| Fort Irwin Solana Beach | Pacific Time | 00:00 |
| Fort Irwin Seekonk | Eastern Time | -03:00 |
| Fort Irwin Bella Vista | Eastern Australia Time | -17:00 |
| Fort Irwin Oka | Eastern Time | -03:00 |