| Willemstad Zuidhorn | Central European Time | -06:00 |
| Willemstad Zuidoostbeemster | Central European Time | -06:00 |
| Willemstad Zugliano | Central European Time | -06:00 |
| Willemstad Wyomissing | Eastern Time | 00:00 |
| Willemstad Wyong | Eastern Australia Time | -14:00 |
| Willemstad Wythall | United Kingdom Time | -05:00 |
| Willemstad Wytheville | Eastern Time | 00:00 |
| Willemstad Xaafuun | East Africa Time | -07:00 |
| Willemstad Xàbia | Central European Time | -06:00 |
| Willemstad Wynn Vale | Central Australia Time | -13:30 |
| Willemstad Wynnewood | Eastern Time | 00:00 |
| Willemstad Wynyard | Eastern Australia Time | -14:00 |
| Willemstad Xaxim | Brasilia Time | -01:00 |
| Willemstad Xalapa | Central Time | 01:00 |
| Willemstad Xalapa Enríquez | Central Time | 01:00 |
| Willemstad Xalisco | Mexican Pacific Time | 02:00 |
| Willemstad Wrightsville | Eastern Time | 00:00 |
| Willemstad Wrightsville Beach | Eastern Time | 00:00 |
| Willemstad Workum | Central European Time | -06:00 |
| Willemstad Worrigee | Eastern Australia Time | -14:00 |
| Willemstad Wörrstadt | Central European Time | -06:00 |
| Willemstad Woy Woy | Eastern Australia Time | -14:00 |
| Willemstad Woods Cross | Mountain Time | 02:00 |
| Willemstad Woody Point | Eastern Australia Time | -14:00 |
| Willemstad Woolloongabba | Eastern Australia Time | -14:00 |
| Willemstad Worb | Central European Time | -06:00 |
| Willemstad West Reading | Eastern Time | 00:00 |
| Willemstad West Richmond | Central Australia Time | -13:30 |
| Willemstad West Runton | United Kingdom Time | -05:00 |
| Willemstad West Ryde | Eastern Australia Time | -14:00 |
| Willemstad Woodinville | Pacific Time | 03:00 |
| Willemstad Woodend | Eastern Australia Time | -14:00 |
| Willemstad Woodfin | Eastern Time | 00:00 |
| Willemstad Woodford | Eastern Australia Time | -14:00 |
| Willemstad Zürs | Central European Time | -06:00 |
| Willemstad Zwingenberg | Central European Time | -06:00 |
| Willemstad Zweisimmen | Central European Time | -06:00 |
| Willemstad Zwiefalten | Central European Time | -06:00 |