| Fort Irwin Canyonville | Pacific Time | 00:00 |
| Fort Irwin Bocas del Toro Province | Eastern Time | -02:00 |
| Fort Irwin Marton | New Zealand Time | -19:00 |
| Fort Irwin Bella Vista | Eastern Australia Time | -17:00 |
| Fort Irwin Barberino Val D'elsa | Central European Time | -09:00 |
| Fort Irwin Belgrade | Mountain Time | -01:00 |
| Fort Irwin Waverley | Eastern Australia Time | -17:00 |
| Fort Irwin Belgrave | Eastern Australia Time | -17:00 |
| Fort Irwin Canyon | Central Time | -02:00 |
| Fort Irwin Bellbrook | Eastern Time | -03:00 |
| Fort Irwin Mascot | Eastern Australia Time | -17:00 |
| Fort Irwin Bellbrook | Eastern Australia Time | -17:00 |
| Fort Irwin Barbiano | Central European Time | -09:00 |
| Fort Irwin Belleair Bluffs | Eastern Time | -03:00 |
| Fort Irwin Wayne | Eastern Time | -03:00 |
| Fort Irwin Blair | Central Time | -02:00 |
| Fort Irwin Barbizon | Central European Time | -09:00 |
| Fort Irwin Blair Athol | Central Australia Time | -16:30 |
| Fort Irwin Masca | Western European Time | -08:00 |
| Fort Irwin Blaichach | Central European Time | -09:00 |
| Fort Irwin Bhigwan | India Standard Time | -12:30 |
| Fort Irwin Belfast | Eastern Time | -03:00 |
| Fort Irwin Waynesville | Eastern Time | -03:00 |
| Fort Irwin Belfort-du-Quercy | Central European Time | -09:00 |
| Fort Irwin Bhimtal | India Standard Time | -12:30 |
| Fort Irwin Belforte del Chienti | Central European Time | -09:00 |
| Fort Irwin Mascali | Central European Time | -09:00 |
| Fort Irwin Belconnen | Eastern Australia Time | -17:00 |
| Fort Irwin Bhilai | India Standard Time | -12:30 |
| Fort Irwin Belagam | India Standard Time | -12:30 |
| Fort Irwin Wayville | Central Australia Time | -16:30 |
| Fort Irwin Be'er Sheva | Israel Time | -10:00 |
| Fort Irwin Bhilar | India Standard Time | -12:30 |
| Fort Irwin Beebe | Central Time | -02:00 |
| Fort Irwin Maski | India Standard Time | -12:30 |
| Fort Irwin Beed | India Standard Time | -12:30 |
| Fort Irwin Bhitoli Khurd | India Standard Time | -12:30 |
| Fort Irwin Beeston | United Kingdom Time | -08:00 |
| Fort Irwin Wayzata | Central Time | -02:00 |
| Fort Irwin Bandar Baru Bangi | Malaysia Time | -15:00 |
| Fort Irwin Bäretswil | Central European Time | -09:00 |
| Fort Irwin Bekasi | Western Indonesia Time | -14:00 |
| Fort Irwin Massa Marittima | Central European Time | -09:00 |
| Fort Irwin Beit Jann | Israel Time | -10:00 |
| Fort Irwin Bargur | India Standard Time | -12:30 |
| Fort Irwin Begur | Central European Time | -09:00 |
| Fort Irwin Weaverville | Pacific Time | 00:00 |
| Fort Irwin Bamber Bridge | United Kingdom Time | -08:00 |
| Fort Irwin Bhatpachlana | India Standard Time | -12:30 |
| Fort Irwin Ban Luang | Indochina Time | -14:00 |