| Fort Irwin Almeley | United Kingdom Time | -08:00 |
| Fort Irwin Fennell Bay | Eastern Australia Time | -17:00 |
| Fort Irwin Odeceixe | Western European Time | -08:00 |
| Fort Irwin Ross-on-Wye | United Kingdom Time | -08:00 |
| Fort Irwin Aberlady | United Kingdom Time | -08:00 |
| Fort Irwin Göreme Belediyesi | Turkey Time | -10:00 |
| Fort Irwin Nishi Ward | Japan Time | -16:00 |
| Fort Irwin Caselle Torinese | Central European Time | -09:00 |
| Fort Irwin Almuwaylih | Arabian Time | -10:00 |
| Fort Irwin Gig Harbor | Pacific Time | 00:00 |
| Fort Irwin Oddanchatram | India Standard Time | -12:30 |
| Fort Irwin Rossett | United Kingdom Time | -08:00 |
| Fort Irwin Abisko | Central European Time | -09:00 |
| Fort Irwin Gorey | Ireland Time | -08:00 |
| Fort Irwin Nimbin | Eastern Australia Time | -17:00 |
| Fort Irwin Castelnau-de-Montmiral | Central European Time | -09:00 |
| Fort Irwin Alphington | Eastern Australia Time | -17:00 |
| Fort Irwin Gilcrux | United Kingdom Time | -08:00 |
| Fort Irwin Palmer | Alaska Time | 01:00 |
| Fort Irwin San Cristóbal de La Laguna | Western European Time | -08:00 |
| Fort Irwin Abingdon | Eastern Time | -03:00 |
| Fort Irwin Frodsham | United Kingdom Time | -08:00 |
| Fort Irwin Nipissing | Eastern Time | -03:00 |
| Fort Irwin Castellamonte | Central European Time | -09:00 |
| Fort Irwin Altavilla Vicentina | Central European Time | -09:00 |
| Fort Irwin Giessen | Central European Time | -09:00 |
| Fort Irwin Palmetto | Eastern Time | -03:00 |
| Fort Irwin San Clemente | Central European Time | -09:00 |
| Fort Irwin Abington | Eastern Time | -03:00 |
| Fort Irwin Gore | New Zealand Time | -19:00 |
| Fort Irwin Grüningen | Central European Time | -09:00 |
| Fort Irwin Casselman | Eastern Time | -03:00 |
| Fort Irwin Altdorf | Central European Time | -09:00 |
| Fort Irwin Giardini Naxos | Central European Time | -09:00 |
| Fort Irwin Palo Cedro | Pacific Time | 00:00 |
| Fort Irwin Sassenberg | Central European Time | -09:00 |
| Fort Irwin Aberdeen | Central Time | -02:00 |
| Fort Irwin Fruitland Park | Eastern Time | -03:00 |
| Fort Irwin Gruissan | Central European Time | -09:00 |
| Fort Irwin Castanet-Tolosan | Central European Time | -09:00 |
| Fort Irwin Altishofen | Central European Time | -09:00 |
| Fort Irwin Giaveno | Central European Time | -09:00 |
| Fort Irwin Palomar Mountain | Pacific Time | 00:00 |
| Fort Irwin Sassnitz | Central European Time | -09:00 |
| Fort Irwin Abeibara | Greenwich Mean Time | -07:00 |
| Fort Irwin Frostburg | Eastern Time | -03:00 |
| Fort Irwin Hioki | Japan Time | -16:00 |
| Fort Irwin Cassis | Central European Time | -09:00 |
| Fort Irwin Altentreptow | Central European Time | -09:00 |
| Fort Irwin Gibsons | Pacific Time | 00:00 |