| Fort Irwin Portales | Mountain Time | -01:00 |
| Fort Irwin Aptos | Pacific Time | 00:00 |
| Fort Irwin Pachore | India Standard Time | -12:30 |
| Fort Irwin Pokolbin | Eastern Australia Time | -17:00 |
| Fort Irwin Wetaskiwin | Mountain Time | -01:00 |
| Fort Irwin Binyamina-Giv'at Ada | Israel Time | -10:00 |
| Fort Irwin Windsor | Eastern Australia Time | -17:00 |
| Fort Irwin West Bountiful | Mountain Time | -01:00 |
| Fort Irwin Penteli | Eastern European Time | -10:00 |
| Fort Irwin Farrer | Eastern Australia Time | -17:00 |
| Fort Irwin Padalur | India Standard Time | -12:30 |
| Fort Irwin Pokhari | India Standard Time | -12:30 |
| Fort Irwin Weston Subedge | United Kingdom Time | -08:00 |
| Fort Irwin Bingen | Central European Time | -09:00 |
| Fort Irwin Winseler | Central European Time | -09:00 |
| Fort Irwin West Bradley | United Kingdom Time | -08:00 |
| Fort Irwin Penwortham | United Kingdom Time | -08:00 |
| Fort Irwin Farr West | Mountain Time | -01:00 |
| Fort Irwin Paddington | Eastern Australia Time | -17:00 |
| Fort Irwin Pont-Sainte-Marie | Central European Time | -09:00 |
| Fort Irwin Wexford | Ireland Time | -08:00 |
| Fort Irwin Bilthoven | Central European Time | -09:00 |
| Fort Irwin Winnsboro | Central Time | -02:00 |
| Fort Irwin West Monroe | Central Time | -02:00 |
| Fort Irwin Penrith | Eastern Australia Time | -17:00 |
| Fort Irwin East Prairie | Central Time | -02:00 |
| Fort Irwin Paddock Wood | United Kingdom Time | -08:00 |
| Fort Irwin Ponte Tresa | Central European Time | -09:00 |
| Fort Irwin Wexford | Eastern Time | -03:00 |
| Fort Irwin Billakempanahalli | India Standard Time | -12:30 |
| Fort Irwin Wingham | United Kingdom Time | -08:00 |
| Fort Irwin West Nyack | Eastern Time | -03:00 |
| Fort Irwin Penrith | United Kingdom Time | -08:00 |
| Fort Irwin Farthinghoe | United Kingdom Time | -08:00 |
| Fort Irwin Ozzano dell'Emilia | Central European Time | -09:00 |
| Fort Irwin Ponte do Rol | Western European Time | -08:00 |
| Fort Irwin Wetherill Park | Eastern Australia Time | -17:00 |
| Fort Irwin Bigfork | Mountain Time | -01:00 |
| Fort Irwin Windsor Locks | Eastern Time | -03:00 |
| Fort Irwin West Park | Eastern Time | -03:00 |
| Fort Irwin Penfield | Eastern Time | -03:00 |
| Fort Irwin East Lyme | Eastern Time | -03:00 |
| Fort Irwin Pa Daet | Indochina Time | -14:00 |
| Fort Irwin Ponte Fabbrica | Central European Time | -09:00 |
| Fort Irwin Whalley | United Kingdom Time | -08:00 |
| Fort Irwin Biggar | United Kingdom Time | -08:00 |
| Fort Irwin Nyack | Eastern Time | -03:00 |
| Fort Irwin West Perth | Western Australia Time | -15:00 |
| Fort Irwin Pennant Hills | Eastern Australia Time | -17:00 |
| Fort Irwin East Maitland | Eastern Australia Time | -17:00 |