| Guanica Wolverton | United Kingdom Time | -04:00 |
| Guanica White City | Pacific Time | 04:00 |
| Guanica Woodbridge | Eastern Time | 01:00 |
| Guanica White Hall | Central Time | 02:00 |
| Guanica Woodbridge Township | Eastern Time | 01:00 |
| Guanica White Lake charter Township | Eastern Time | 01:00 |
| Guanica Woodcroft | Central Australia Time | -14:30 |
| Guanica Wetzikon | Central European Time | -05:00 |
| Guanica Wohratal | Central European Time | -05:00 |
| Guanica Wexford | Ireland Time | -04:00 |
| Guanica Wivenhoe | United Kingdom Time | -04:00 |
| Guanica Whalley | United Kingdom Time | -04:00 |
| Guanica Wittenberg | Central European Time | -05:00 |
| Guanica Whanganui | New Zealand Time | -17:00 |
| Guanica Wisconsin Dells | Central Time | 02:00 |
| Guanica Wexford | Eastern Time | 01:00 |
| Guanica Wirksworth | United Kingdom Time | -04:00 |
| Guanica Whitefish | Mountain Time | 03:00 |
| Guanica Wirsberg | Central European Time | -05:00 |
| Guanica Whiteman Air Force Base | Central Time | 02:00 |
| Guanica Zuidhorn | Central European Time | -05:00 |
| Guanica Whitesboro | Eastern Time | 01:00 |
| Guanica Zuidoostbeemster | Central European Time | -05:00 |
| Guanica Whiteville | Eastern Time | 01:00 |
| Guanica Zoutelande | Central European Time | -05:00 |
| Guanica Whitewater | Central Time | 02:00 |
| Guanica Zugliano | Central European Time | -05:00 |
| Guanica Zandhoven | Central European Time | -05:00 |
| Guanica Zürs | Central European Time | -05:00 |
| Guanica Zanzibar Town | East Africa Time | -07:00 |
| Guanica Zwingenberg | Central European Time | -05:00 |
| Guanica Zermatt | Central European Time | -05:00 |
| Guanica Zwiefalten | Central European Time | -05:00 |
| Guanica Zeven | Central European Time | -05:00 |
| Guanica Zweisimmen | Central European Time | -05:00 |
| Guanica Zero Branco | Central European Time | -05:00 |
| Guanica Zephyr | Eastern Time | 01:00 |
| Guanica Zephyrhills | Eastern Time | 01:00 |