| Sinop Wivenhoe | United Kingdom Time | -05:00 |
| Sinop Willaston | United Kingdom Time | -05:00 |
| Sinop Winton | New Zealand Time | -16:00 |
| Sinop Williamstown | Eastern Australia Time | -14:00 |
| Sinop Wirksworth | United Kingdom Time | -05:00 |
| Sinop Williams | Mountain Time | 03:00 |
| Sinop Wirsberg | Central European Time | -06:00 |
| Sinop Williamsburg | Eastern Time | 00:00 |
| Sinop Wisconsin Dells | Central Time | 01:00 |
| Sinop Wildwood | Eastern Time | 00:00 |
| Sinop Wittenberg | Central European Time | -06:00 |
| Sinop Wilkau-Haßlau | Central European Time | -06:00 |
| Sinop Winseler | Central European Time | -06:00 |
| Sinop Wilkesboro | Eastern Time | 00:00 |
| Sinop Winnsboro | Central Time | 01:00 |
| Sinop Wilbraham | Eastern Time | 00:00 |
| Sinop Winterville | Eastern Time | 00:00 |
| Sinop Wildau | Central European Time | -06:00 |
| Sinop Vosselaar | Central European Time | -06:00 |
| Sinop Wilder | Eastern Time | 00:00 |
| Sinop Windsor | Eastern Australia Time | -14:00 |
| Sinop Wilderswil | Central European Time | -06:00 |
| Sinop Windsor | Eastern Australia Time | -14:00 |
| Sinop Wiesbaden | Central European Time | -06:00 |
| Sinop Wingham | United Kingdom Time | -05:00 |
| Sinop Wieselburg | Central European Time | -06:00 |
| Sinop Windsor Locks | Eastern Time | 00:00 |
| Sinop Zikhron Ya'akov | Israel Time | -07:00 |
| Sinop Vostochny District | Moscow Time | -07:00 |
| Sinop Zillah | Pacific Time | 03:00 |
| Sinop Windcrest | Central Time | 01:00 |
| Sinop Windeck | Central European Time | -06:00 |
| Sinop Winder | Eastern Time | 00:00 |
| Sinop Windham | Eastern Time | 00:00 |
| Sinop Zhongshan | China Time | -12:00 |
| Sinop Zirakpur | India Standard Time | -09:30 |
| Sinop Zofingen | Central European Time | -06:00 |
| Sinop Zollikerberg | Central European Time | -06:00 |