| Iwo Williamsburg | Eastern Time | 05:00 |
| Iwo Wilbraham | Eastern Time | 05:00 |
| Iwo Wildau | Central European Time | -01:00 |
| Iwo Wilder | Eastern Time | 05:00 |
| Iwo Wilderswil | Central European Time | -01:00 |
| Iwo Wildwood | Eastern Time | 05:00 |
| Iwo Wilkau-Haßlau | Central European Time | -01:00 |
| Iwo Wilkesboro | Eastern Time | 05:00 |
| Iwo Virton | Central European Time | -01:00 |
| Iwo Whitney | Central Time | 06:00 |
| Iwo Virginia | Central Time | 06:00 |
| Iwo Virajpet | India Standard Time | -04:30 |
| Iwo Virapandi | India Standard Time | -04:30 |
| Iwo Wiesbaden | Central European Time | -01:00 |
| Iwo Wieselburg | Central European Time | -01:00 |
| Iwo Wickham | United Kingdom Time | 00:00 |
| Iwo Wickham Bishops | United Kingdom Time | 00:00 |
| Iwo Wicklow | Ireland Time | 00:00 |
| Iwo Widnau | Central European Time | -01:00 |
| Iwo Wilmington | Eastern Time | 05:00 |
| Iwo Willows | Pacific Time | 08:00 |
| Iwo Willunga | Central Australia Time | -08:30 |
| Iwo Willoughby | Eastern Australia Time | -09:00 |
| Iwo Wilton Manors | Eastern Time | 05:00 |
| Iwo Wiltz | Central European Time | -01:00 |
| Iwo Winchcombe | United Kingdom Time | 00:00 |
| Iwo Windcrest | Central Time | 06:00 |
| Iwo Windeck | Central European Time | -01:00 |
| Iwo Winder | Eastern Time | 05:00 |
| Iwo Windham | Eastern Time | 05:00 |
| Iwo Zandhoven | Central European Time | -01:00 |
| Iwo Winchester | Eastern Time | 05:00 |
| Iwo Zanzibar Town | East Africa Time | -02:00 |
| Iwo Zephyr | Eastern Time | 05:00 |
| Iwo Zephyrhills | Eastern Time | 05:00 |
| Iwo Zermatt | Central European Time | -01:00 |
| Iwo Zero Branco | Central European Time | -01:00 |
| Iwo Zeven | Central European Time | -01:00 |