| Kelmarsh Cortona | Central European Time | -01:00 |
| Kelmarsh Costa da Caparica | Western European Time | 00:00 |
| Kelmarsh Costa d'en Blanes | Central European Time | -01:00 |
| Kelmarsh Cosmopolis | Pacific Time | 08:00 |
| Kelmarsh Costa Teguise | Western European Time | 00:00 |
| Kelmarsh Chikusa Ward | Japan Time | -08:00 |
| Kelmarsh Capraia E Limite | Central European Time | -01:00 |
| Kelmarsh Capileira | Central European Time | -01:00 |
| Kelmarsh Capilla del Monte | Argentina Time | 04:00 |
| Kelmarsh Capitol Heights | Eastern Time | 05:00 |
| Kelmarsh Capitola | Pacific Time | 08:00 |
| Kelmarsh Chester | Eastern Time | 05:00 |
| Kelmarsh Chester Hill | Eastern Australia Time | -09:00 |
| Kelmarsh Chesterland | Eastern Time | 05:00 |
| Kelmarsh Chestermere | Mountain Time | 07:00 |
| Kelmarsh Chesterton | Central Time | 06:00 |
| Kelmarsh Chestertown | Eastern Time | 05:00 |
| Kelmarsh Chicago | Central Time | 06:00 |
| Kelmarsh Chianciano Terme | Central European Time | -01:00 |
| Kelmarsh Chiang Mai | Indochina Time | -06:00 |
| Kelmarsh Cannon Air Force Base | Mountain Time | 07:00 |
| Kelmarsh Cannington | Western Australia Time | -07:00 |
| Kelmarsh Cannington | Eastern Time | 05:00 |
| Kelmarsh Canley Heights | Eastern Australia Time | -09:00 |
| Kelmarsh Canley Vale | Eastern Australia Time | -09:00 |
| Kelmarsh Canmore | Mountain Time | 07:00 |
| Kelmarsh Canena | Central European Time | -01:00 |
| Kelmarsh Candolim | India Standard Time | -04:30 |
| Kelmarsh Canfield | Eastern Time | 05:00 |
| Kelmarsh Cangey | Central European Time | -01:00 |
| Kelmarsh Cape Town | South Africa Standard Time | -01:00 |
| Kelmarsh Cape Town | South Africa Standard Time | -01:00 |
| Kelmarsh Capel Saint Mary | United Kingdom Time | 00:00 |
| Kelmarsh Capanne | Central European Time | -01:00 |
| Kelmarsh Cape Breton | Atlantic Time | 04:00 |
| Kelmarsh Canyonville | Pacific Time | 08:00 |
| Kelmarsh Caorle | Central European Time | -01:00 |
| Kelmarsh Canyon | Central Time | 06:00 |