| Willemstad Chelsea | Eastern Time | 00:00 |
| Willemstad Alagón | Central European Time | -06:00 |
| Willemstad Dabaspete | India Standard Time | -09:30 |
| Willemstad Alachua | Eastern Time | 00:00 |
| Willemstad Chehalis | Pacific Time | 03:00 |
| Willemstad Al-Qayrawan | Central European Time | -05:00 |
| Willemstad Dade City | Eastern Time | 00:00 |
| Willemstad Cheddar | United Kingdom Time | -05:00 |
| Willemstad Cyberjaya | Malaysia Time | -12:00 |
| Willemstad Capraia E Limite | Central European Time | -06:00 |
| Willemstad Cygnet | Eastern Australia Time | -14:00 |
| Willemstad Chauth Ka Barwara | India Standard Time | -09:30 |
| Willemstad Chavakachcheri | India Standard Time | -09:30 |
| Willemstad Cape Town | South Africa Standard Time | -06:00 |
| Willemstad Cape Town | South Africa Standard Time | -06:00 |
| Willemstad Capel Saint Mary | United Kingdom Time | -05:00 |
| Willemstad Capitol Heights | Eastern Time | 00:00 |
| Willemstad Capitola | Pacific Time | 03:00 |
| Willemstad Capileira | Central European Time | -06:00 |
| Willemstad Capilla del Monte | Argentina Time | -01:00 |
| Willemstad Canyon | Central Time | 01:00 |
| Willemstad Cannon Air Force Base | Mountain Time | 02:00 |
| Willemstad Cape Breton | Atlantic Time | -01:00 |
| Willemstad Canyonville | Pacific Time | 03:00 |
| Willemstad Capanne | Central European Time | -06:00 |
| Willemstad Caorle | Central European Time | -06:00 |
| Willemstad Corella | Central European Time | -06:00 |
| Willemstad Corfu | Eastern European Time | -07:00 |
| Willemstad Corinth | Central Time | 01:00 |
| Willemstad Cordele | Eastern Time | 00:00 |
| Willemstad Coquille | Pacific Time | 03:00 |
| Willemstad Coppengrave | Central European Time | -06:00 |
| Willemstad Cherthala | India Standard Time | -09:30 |
| Willemstad Cherukupalli | India Standard Time | -09:30 |
| Willemstad Coogee | Eastern Australia Time | -14:00 |
| Willemstad Copacabana | Bolivia Time | 00:00 |
| Willemstad Coonoor | India Standard Time | -09:30 |
| Willemstad Copley | Eastern Time | 00:00 |
| Willemstad Cooks Hill | Eastern Australia Time | -14:00 |
| Willemstad Coolangatta | Eastern Australia Time | -14:00 |
| Willemstad Coolock | Ireland Time | -05:00 |
| Willemstad Coolum Beach | Eastern Australia Time | -14:00 |
| Willemstad Coopers Plains | Eastern Australia Time | -14:00 |
| Willemstad Coopersburg | Eastern Time | 00:00 |
| Willemstad Cooperstown | Eastern Time | 00:00 |
| Willemstad Cooranbong | Eastern Australia Time | -14:00 |
| Willemstad Coorparoo | Eastern Australia Time | -14:00 |
| Willemstad Coromandel | New Zealand Time | -16:00 |
| Willemstad Corolla | Eastern Time | 00:00 |
| Willemstad Cornwall-on-Hudson | Eastern Time | 00:00 |