| Johns Island Carhaix-Plouguer | Central European Time | -06:00 |
| Johns Island Fergus | Eastern Time | 00:00 |
| Johns Island Cova da Piedade | Western European Time | -05:00 |
| Johns Island Fennville | Eastern Time | 00:00 |
| Johns Island Cardona | Central European Time | -06:00 |
| Johns Island Fennell Bay | Eastern Australia Time | -14:00 |
| Johns Island Coulter | United Kingdom Time | -05:00 |
| Johns Island Cardonville | Central European Time | -06:00 |
| Johns Island Courmayeur | Central European Time | -06:00 |
| Johns Island Cardiff | Eastern Australia Time | -14:00 |
| Johns Island Cottage Grove | Pacific Time | 03:00 |
| Johns Island Cardigan | United Kingdom Time | -05:00 |
| Johns Island Cottonwood | Mountain Time | 03:00 |
| Johns Island Carleton Place | Eastern Time | 00:00 |
| Johns Island Costa Teguise | Western European Time | -05:00 |
| Johns Island Carle Place | Eastern Time | 00:00 |
| Johns Island Cotgrave | United Kingdom Time | -05:00 |
| Johns Island Carlingford | Ireland Time | -05:00 |
| Johns Island Cotati | Pacific Time | 03:00 |
| Johns Island Carlin | Pacific Time | 03:00 |
| Johns Island Covington | Central Time | 01:00 |
| Johns Island Carlton | Eastern Australia Time | -14:00 |
| Johns Island Cowaramup | Western Australia Time | -12:00 |
| Johns Island Carlton North | Eastern Australia Time | -14:00 |
| Johns Island Cozumel | Eastern Time | 01:00 |
| Johns Island Caraíva | Brasilia Time | -01:00 |
| Johns Island Cramlington | United Kingdom Time | -05:00 |
| Johns Island Broussard | Central Time | 01:00 |
| Johns Island Differdange | Central European Time | -06:00 |
| Johns Island Browns Plains | Eastern Australia Time | -14:00 |
| Johns Island Digne | Central European Time | -06:00 |
| Johns Island Caraz | Peru Time | 01:00 |
| Johns Island Corralejo | Western European Time | -05:00 |
| Johns Island Cárcar | Central European Time | -06:00 |
| Johns Island Cortona | Central European Time | -06:00 |
| Johns Island Carbis Bay | United Kingdom Time | -05:00 |
| Johns Island Corte De' Frati | Central European Time | -06:00 |
| Johns Island Carmel-by-the-Sea | Pacific Time | 03:00 |
| Johns Island Corte Madera | Pacific Time | 03:00 |
| Johns Island Carnac | Central European Time | -06:00 |
| Johns Island Costa da Caparica | Western European Time | -05:00 |
| Johns Island Carnforth | United Kingdom Time | -05:00 |
| Johns Island Costa d'en Blanes | Central European Time | -06:00 |
| Johns Island Caroline Springs | Eastern Australia Time | -14:00 |
| Johns Island Cosmopolis | Pacific Time | 03:00 |
| Johns Island Carole Park | Eastern Australia Time | -14:00 |
| Johns Island Chikusa Ward | Japan Time | -13:00 |
| Johns Island Carolina Beach | Eastern Time | 00:00 |
| Johns Island Capitol Heights | Eastern Time | 00:00 |
| Johns Island Chilmark | Eastern Time | 00:00 |