| Giffnock Waupaca | Central Time | 06:00 |
| Giffnock Wauchope | Eastern Australia Time | -09:00 |
| Giffnock Waverley | Eastern Australia Time | -09:00 |
| Giffnock Wavre | Central European Time | -01:00 |
| Giffnock Wayne | Eastern Time | 05:00 |
| Giffnock Waynesville | Eastern Time | 05:00 |
| Giffnock Wayville | Central Australia Time | -08:30 |
| Giffnock Wayzata | Central Time | 06:00 |
| Giffnock Weaverville | Pacific Time | 08:00 |
| Giffnock Webbers Falls | Central Time | 06:00 |
| Giffnock Webster | Central Time | 06:00 |
| Giffnock Woodinville | Pacific Time | 08:00 |
| Giffnock Woodend | Eastern Australia Time | -09:00 |
| Giffnock Woodfin | Eastern Time | 05:00 |
| Giffnock Woodford | Eastern Australia Time | -09:00 |
| Giffnock Woods Cross | Mountain Time | 07:00 |
| Giffnock Woody Point | Eastern Australia Time | -09:00 |
| Giffnock Woolloongabba | Eastern Australia Time | -09:00 |
| Giffnock Worb | Central European Time | -01:00 |
| Giffnock Wrightsville | Eastern Time | 05:00 |
| Giffnock Wrightsville Beach | Eastern Time | 05:00 |
| Giffnock Workum | Central European Time | -01:00 |
| Giffnock Worrigee | Eastern Australia Time | -09:00 |
| Giffnock Wörrstadt | Central European Time | -01:00 |
| Giffnock Woy Woy | Eastern Australia Time | -09:00 |
| Giffnock Wyomissing | Eastern Time | 05:00 |
| Giffnock Wyong | Eastern Australia Time | -09:00 |
| Giffnock Wythall | United Kingdom Time | 00:00 |
| Giffnock Wytheville | Eastern Time | 05:00 |
| Giffnock Xaafuun | East Africa Time | -02:00 |
| Giffnock Xàbia | Central European Time | -01:00 |
| Giffnock Wynn Vale | Central Australia Time | -08:30 |
| Giffnock Wynnewood | Eastern Time | 05:00 |
| Giffnock Wynyard | Eastern Australia Time | -09:00 |
| Giffnock Xaxim | Brasilia Time | 04:00 |
| Giffnock Xalapa | Central Time | 06:00 |
| Giffnock Xalapa Enríquez | Central Time | 06:00 |
| Giffnock Xalisco | Mexican Pacific Time | 07:00 |