| Ridgefield Castelnau-de-Montmiral | Central European Time | -06:00 |
| Ridgefield Yenda | Eastern Australia Time | -14:00 |
| Ridgefield Clawson | Eastern Time | 00:00 |
| Ridgefield Yermo | Pacific Time | 03:00 |
| Ridgefield Castelsardo | Central European Time | -06:00 |
| Ridgefield Yeroskipou | Eastern European Time | -07:00 |
| Ridgefield Clearwater | Eastern Time | 00:00 |
| Ridgefield Yodogawa Ward | Japan Time | -13:00 |
| Ridgefield Clayton South | Eastern Australia Time | -14:00 |
| Ridgefield Clayton | Eastern Time | 00:00 |
| Ridgefield Cle Elum | Pacific Time | 03:00 |
| Ridgefield Clear Lake | Central Time | 01:00 |
| Ridgefield Clemson | Eastern Time | 00:00 |
| Ridgefield Cleobury Mortimer | United Kingdom Time | -05:00 |
| Ridgefield Clerques | Central European Time | -06:00 |
| Ridgefield Clervaux | Central European Time | -06:00 |
| Ridgefield Clonakilty | Ireland Time | -05:00 |
| Ridgefield Clonmel | Ireland Time | -05:00 |
| Ridgefield Clinton | Central Time | 01:00 |
| Ridgefield Clifton Hill | Eastern Australia Time | -14:00 |
| Ridgefield Clontarf | Ireland Time | -05:00 |
| Ridgefield Clusane | Central European Time | -06:00 |
| Ridgefield Clyde | Eastern Australia Time | -14:00 |
| Ridgefield Clute | Central Time | 01:00 |
| Ridgefield Clyst Saint Mary | United Kingdom Time | -05:00 |
| Ridgefield Coacalco de Berriozabal | Central Time | 01:00 |
| Ridgefield Carvoeiro | Western European Time | -05:00 |
| Ridgefield Casale Marittimo | Central European Time | -06:00 |
| Ridgefield Carrouge | Central European Time | -06:00 |
| Ridgefield Castanet-Tolosan | Central European Time | -06:00 |
| Ridgefield Cassis | Central European Time | -06:00 |
| Ridgefield Castagneto Carducci | Central European Time | -06:00 |
| Ridgefield Cassà de la Selva | Central European Time | -06:00 |
| Ridgefield Casselman | Eastern Time | 00:00 |
| Ridgefield Casaletto Ceredano | Central European Time | -06:00 |
| Ridgefield Caslano | Central European Time | -06:00 |
| Ridgefield Casillas | Central European Time | -06:00 |
| Ridgefield Caselle Torinese | Central European Time | -06:00 |