| Ulm Waite Park | Central Time | 07:00 |
| Ulm Waitomo | New Zealand Time | -10:00 |
| Ulm Waitsfield | Eastern Time | 06:00 |
| Ulm Wakefield | Eastern Time | 06:00 |
| Ulm Wakan | Gulf Standard Time | -02:00 |
| Ulm Wadakkanchery | India Standard Time | -03:30 |
| Ulm Wahroonga | Eastern Australia Time | -08:00 |
| Ulm Waghunde Kh. | India Standard Time | -03:30 |
| Ulm Wagoner | Central Time | 07:00 |
| Ulm Wagrain | Central European Time | 00:00 |
| Ulm Woy Woy | Eastern Australia Time | -08:00 |
| Ulm Wrightsville | Eastern Time | 06:00 |
| Ulm Wrightsville Beach | Eastern Time | 06:00 |
| Ulm Workum | Central European Time | 00:00 |
| Ulm Worrigee | Eastern Australia Time | -08:00 |
| Ulm Wörrstadt | Central European Time | 00:00 |
| Ulm Woods Cross | Mountain Time | 08:00 |
| Ulm Worb | Central European Time | 00:00 |
| Ulm Woody Point | Eastern Australia Time | -08:00 |
| Ulm Woolloongabba | Eastern Australia Time | -08:00 |
| Ulm Woodinville | Pacific Time | 09:00 |
| Ulm Walchwil | Central European Time | 00:00 |
| Ulm Woodend | Eastern Australia Time | -08:00 |
| Ulm Woodfin | Eastern Time | 06:00 |
| Ulm Woodford | Eastern Australia Time | -08:00 |
| Ulm Wynn Vale | Central Australia Time | -07:30 |
| Ulm Wynnewood | Eastern Time | 06:00 |
| Ulm Wynyard | Eastern Australia Time | -08:00 |
| Ulm Wythall | United Kingdom Time | 01:00 |
| Ulm Wytheville | Eastern Time | 06:00 |
| Ulm Xaafuun | East Africa Time | -01:00 |
| Ulm Xàbia | Central European Time | 00:00 |
| Ulm Wyomissing | Eastern Time | 06:00 |
| Ulm Wyong | Eastern Australia Time | -08:00 |
| Ulm Xaxim | Brasilia Time | 05:00 |
| Ulm Xalapa | Central Time | 07:00 |
| Ulm Xalapa Enríquez | Central Time | 07:00 |
| Ulm Xalisco | Mexican Pacific Time | 08:00 |