| Rancho Cucamonga Vajdi | India Standard Time | -13:30 |
| Rancho Cucamonga Valea Crișului | Eastern European Time | -10:00 |
| Rancho Cucamonga Valkenburg | Central European Time | -09:00 |
| Rancho Cucamonga Uttwil | Central European Time | -09:00 |
| Rancho Cucamonga Vaduz | Central European Time | -09:00 |
| Rancho Cucamonga Vada | Central European Time | -09:00 |
| Rancho Cucamonga Vadakara | India Standard Time | -13:30 |
| Rancho Cucamonga Vadakkencherry | India Standard Time | -13:30 |
| Rancho Cucamonga Tomball | Central Time | -02:00 |
| Rancho Cucamonga Uthangarai | India Standard Time | -13:30 |
| Rancho Cucamonga Utila | Central Time | -02:00 |
| Rancho Cucamonga Ustrzyki Dolne | Central European Time | -09:00 |
| Rancho Cucamonga Tönning | Central European Time | -09:00 |
| Rancho Cucamonga Warburton | Eastern Australia Time | -19:00 |
| Rancho Cucamonga Wareham | Eastern Time | -03:00 |
| Rancho Cucamonga Wappingers Falls | Eastern Time | -03:00 |
| Rancho Cucamonga Warana | Eastern Australia Time | -18:00 |
| Rancho Cucamonga Warner | Eastern Time | -03:00 |
| Rancho Cucamonga Xiangxi | China Time | -16:00 |
| Rancho Cucamonga Wang Maprang Nuea | Indochina Time | -15:00 |
| Rancho Cucamonga Wangara | Western Australia Time | -16:00 |
| Rancho Cucamonga Wanguri | Central Australia Time | -17:30 |
| Rancho Cucamonga Wamego | Central Time | -02:00 |
| Rancho Cucamonga Wanaka | New Zealand Time | -21:00 |
| Rancho Cucamonga Wandiligong | Eastern Australia Time | -19:00 |
| Rancho Cucamonga Waltenhofen | Central European Time | -09:00 |
| Rancho Cucamonga Walzbachtal | Central European Time | -09:00 |
| Rancho Cucamonga Wals | Central European Time | -09:00 |
| Rancho Cucamonga Walled Lake | Eastern Time | -03:00 |
| Rancho Cucamonga Wallisellen | Central European Time | -09:00 |
| Rancho Cucamonga Waliv | India Standard Time | -13:30 |
| Rancho Cucamonga Waldkirchen | Central European Time | -09:00 |
| Rancho Cucamonga Walenstadt | Central European Time | -09:00 |
| Rancho Cucamonga Xuchang | China Time | -16:00 |
| Rancho Cucamonga Xuzhou | China Time | -16:00 |
| Rancho Cucamonga Yaliyuru | India Standard Time | -13:30 |
| Rancho Cucamonga Yallabatharra | Western Australia Time | -16:00 |
| Rancho Cucamonga Yallambie | Eastern Australia Time | -19:00 |