| Idalia Dabaspete | India Standard Time | 04:30 |
| Idalia Mill Run | Eastern Time | 14:00 |
| Idalia Cyberjaya | Malaysia Time | 02:00 |
| Idalia Mill Valley | Pacific Time | 17:00 |
| Idalia Cygnet | Eastern Australia Time | 00:00 |
| Idalia Millbrook | Eastern Time | 14:00 |
| Idalia Cunit | Central European Time | 08:00 |
| Idalia Millbrook | Central Time | 15:00 |
| Idalia Cuorgnè | Central European Time | 08:00 |
| Idalia Cumming | Eastern Time | 14:00 |
| Idalia Curral Velho | Cape Verde Time | 11:00 |
| Idalia Currans Hill | Eastern Australia Time | 00:00 |
| Idalia City of Orange | Eastern Time | 14:00 |
| Idalia City of Industry | Pacific Time | 17:00 |
| Idalia Città Sant'Angelo | Central European Time | 08:00 |
| Idalia Cittadella | Central European Time | 08:00 |
| Idalia Ciudad Colón | Central Time | 16:00 |
| Idalia Ciudad de la Costa | Uruguay Time | 13:00 |
| Idalia Ciudad de México | Central Time | 15:00 |
| Idalia Castellamonte | Central European Time | 08:00 |
| Idalia Castelnau-de-Montmiral | Central European Time | 08:00 |
| Idalia Cisnădioara | Eastern European Time | 07:00 |
| Idalia Castelsardo | Central European Time | 08:00 |
| Idalia Castanet-Tolosan | Central European Time | 08:00 |
| Idalia Cassis | Central European Time | 08:00 |
| Idalia Castagneto Carducci | Central European Time | 08:00 |
| Idalia Casselman | Eastern Time | 14:00 |
| Idalia Caslano | Central European Time | 08:00 |
| Idalia Cassà de la Selva | Central European Time | 08:00 |
| Idalia Carrouge | Central European Time | 08:00 |
| Idalia Carovigno | Central European Time | 08:00 |
| Idalia Buena | Eastern Time | 14:00 |
| Idalia Carpinteria | Pacific Time | 17:00 |
| Idalia Carvoeiro | Western European Time | 09:00 |
| Idalia Casale Marittimo | Central European Time | 08:00 |
| Idalia Casaletto Ceredano | Central European Time | 08:00 |
| Idalia Casillas | Central European Time | 08:00 |
| Idalia Caselle Torinese | Central European Time | 08:00 |