| Sunnyvale Hawkesbury | Eastern Time | -03:00 |
| Sunnyvale Havana | Cuba Time | -03:00 |
| Sunnyvale Havana | Eastern Time | -03:00 |
| Sunnyvale Hausen bei Würzburg | Central European Time | -09:00 |
| Sunnyvale Havelock North | New Zealand Time | -19:00 |
| Sunnyvale Haverfordwest | United Kingdom Time | -08:00 |
| Sunnyvale Havertown | Eastern Time | -03:00 |
| Sunnyvale Jambiani | East Africa Time | -10:00 |
| Sunnyvale Jane | Central Time | -02:00 |
| Sunnyvale Jalhay | Central European Time | -09:00 |
| Sunnyvale Jaljulia | Israel Time | -10:00 |
| Sunnyvale Jalke Bk. | India Standard Time | -12:30 |
| Sunnyvale Jasper | Central Time | -02:00 |
| Sunnyvale Jasin | Malaysia Time | -15:00 |
| Sunnyvale Jarmen | Central European Time | -09:00 |
| Sunnyvale Järfälla | Central European Time | -09:00 |
| Sunnyvale Jefferson | Eastern Time | -03:00 |
| Sunnyvale Jayamkondan | India Standard Time | -12:30 |
| Sunnyvale Jagannathpur | India Standard Time | -12:30 |
| Sunnyvale Jadayampalayam | India Standard Time | -12:30 |
| Sunnyvale Jahra | Arabian Time | -10:00 |
| Sunnyvale Jaigaon | India Standard Time | -12:30 |
| Sunnyvale Jaimalwala Alias Pireana | India Standard Time | -12:30 |
| Sunnyvale Jaggayyapet | India Standard Time | -12:30 |
| Sunnyvale Ivins | Mountain Time | -01:00 |
| Sunnyvale Ittigen | Central European Time | -09:00 |
| Sunnyvale Ivanhoe | Eastern Australia Time | -17:00 |
| Sunnyvale Ixelles | Central European Time | -09:00 |
| Sunnyvale Izumisano | Japan Time | -16:00 |
| Sunnyvale Izurtza | Central European Time | -09:00 |
| Sunnyvale Johns Island | Eastern Time | -03:00 |
| Sunnyvale Jojutla de Juárez | Central Time | -02:00 |
| Sunnyvale Jonesborough | Eastern Time | -03:00 |
| Sunnyvale Jonestown | Central Time | -02:00 |
| Sunnyvale Jonesville | Eastern Time | -03:00 |
| Sunnyvale Joondalup | Western Australia Time | -15:00 |
| Sunnyvale Jordan | Central Time | -02:00 |
| Sunnyvale Jinzhou | China Time | -15:00 |
| Sunnyvale Junagadh district | India Standard Time | -12:30 |
| Sunnyvale Joshua Tree | Pacific Time | 00:00 |
| Sunnyvale Jeleeb Al-Shuyoukh | Arabian Time | -10:00 |
| Sunnyvale Jejuri | India Standard Time | -12:30 |
| Sunnyvale Jenjarom | Malaysia Time | -15:00 |
| Sunnyvale Jenkintown | Eastern Time | -03:00 |
| Sunnyvale Jelutong | Malaysia Time | -15:00 |
| Sunnyvale Jensen Beach | Eastern Time | -03:00 |
| Sunnyvale Jerez | Central European Time | -09:00 |
| Sunnyvale Jerome | Mountain Time | 00:00 |
| Sunnyvale Jericho | Eastern Time | -03:00 |
| Sunnyvale Jersey Shore | Eastern Time | -03:00 |