| Otsu Al Jaghbub | Eastern European Time | 07:00 |
| Otsu Al Hofuf | Arabian Time | 06:00 |
| Otsu Wolfschlugen | Central European Time | 08:00 |
| Otsu Wolfville | Atlantic Time | 13:00 |
| Otsu Wolkersdorf im Weinviertel | Central European Time | 08:00 |
| Otsu Wommelgem | Central European Time | 08:00 |
| Otsu Wolverton | United Kingdom Time | 09:00 |
| Otsu Wohratal | Central European Time | 08:00 |
| Otsu Wittenberg | Central European Time | 08:00 |
| Otsu Wivenhoe | United Kingdom Time | 09:00 |
| Otsu Wisconsin Dells | Central Time | 15:00 |
| Otsu Winton | New Zealand Time | -04:00 |
| Otsu Winterville | Eastern Time | 14:00 |
| Otsu Wirksworth | United Kingdom Time | 09:00 |
| Otsu Wirsberg | Central European Time | 08:00 |
| Otsu Voorhees Township | Eastern Time | 14:00 |
| Otsu Voroneț | Eastern European Time | 07:00 |
| Otsu Vosselaar | Central European Time | 08:00 |
| Otsu Vostochny District | Moscow Time | 06:00 |
| Otsu Winseler | Central European Time | 08:00 |
| Otsu Winnsboro | Central Time | 15:00 |
| Otsu Wingham | United Kingdom Time | 09:00 |
| Otsu Windsor Locks | Eastern Time | 14:00 |
| Otsu Windsor | Eastern Australia Time | -02:00 |
| Otsu Windsor | Eastern Australia Time | -01:00 |
| Otsu Volcano | Hawaii-Aleutian Time | 19:00 |
| Otsu Volterra | Central European Time | 08:00 |
| Otsu Zuidhorn | Central European Time | 08:00 |
| Otsu Zuidoostbeemster | Central European Time | 08:00 |
| Otsu Zugliano | Central European Time | 08:00 |
| Otsu Zoutelande | Central European Time | 08:00 |
| Otsu Woodcroft | Central Australia Time | -01:30 |
| Otsu Woodbridge | Eastern Time | 14:00 |
| Otsu Woodbridge Township | Eastern Time | 14:00 |
| Otsu Zürs | Central European Time | 08:00 |
| Otsu Zwingenberg | Central European Time | 08:00 |
| Otsu Zwiefalten | Central European Time | 08:00 |
| Otsu Zweisimmen | Central European Time | 08:00 |