| Siwa Oasis Carrouge | Central European Time | 00:00 |
| Siwa Oasis Empuriabrava | Central European Time | 00:00 |
| Siwa Oasis Carvoeiro | Western European Time | 01:00 |
| Siwa Oasis Emmaus | Eastern Time | 06:00 |
| Siwa Oasis Casale Marittimo | Central European Time | 00:00 |
| Siwa Oasis Enderby | Pacific Time | 09:00 |
| Siwa Oasis Casaletto Ceredano | Central European Time | 00:00 |
| Siwa Oasis England | Eastern European Time | -01:00 |
| Siwa Oasis Cassà de la Selva | Central European Time | 00:00 |
| Siwa Oasis Engelberg | Central European Time | 00:00 |
| Siwa Oasis Caslano | Central European Time | 00:00 |
| Siwa Oasis Freiburg | Central European Time | 00:00 |
| Siwa Oasis Casillas | Central European Time | 00:00 |
| Siwa Oasis Fresnedillas de la Oliva | Central European Time | 00:00 |
| Siwa Oasis Caselle Torinese | Central European Time | 00:00 |
| Siwa Oasis Frenchtown | Eastern Time | 06:00 |
| Siwa Oasis Fredonia | Eastern Time | 06:00 |
| Siwa Oasis Freeland | Eastern Time | 06:00 |
| Siwa Oasis Freeport | Central Time | 07:00 |
| Siwa Oasis Frazier Park | Pacific Time | 09:00 |
| Siwa Oasis Frederica | Eastern Time | 06:00 |
| Siwa Oasis Franschhoek | South Africa Standard Time | 00:00 |
| Siwa Oasis Franz Josef Glacier | New Zealand Time | -10:00 |
| Siwa Oasis Franklin Township | Eastern Time | 06:00 |
| Siwa Oasis Englishtown | Eastern Time | 06:00 |
| Siwa Oasis Enmore | Eastern Australia Time | -08:00 |
| Siwa Oasis Gort | Ireland Time | 01:00 |
| Siwa Oasis Gosford | Eastern Australia Time | -08:00 |
| Siwa Oasis Göreme Belediyesi | Turkey Time | -01:00 |
| Siwa Oasis Gorey | Ireland Time | 01:00 |
| Siwa Oasis Gore | New Zealand Time | -10:00 |
| Siwa Oasis Frodsham | United Kingdom Time | 01:00 |
| Siwa Oasis Friendsville | Eastern Time | 06:00 |
| Siwa Oasis Fruitland Park | Eastern Time | 06:00 |
| Siwa Oasis Frostburg | Eastern Time | 06:00 |
| Siwa Oasis Friedland | Central European Time | 00:00 |
| Siwa Oasis Friedberg | Central European Time | 00:00 |
| Siwa Oasis Friday Harbor | Pacific Time | 09:00 |