You need to upgrade your Flash PlayerThis is replaced by the Flash content. Daylight-Saving Time is not in effect. Cayman Islands is in the Caribbean; Grand Cayman, the largest of the three Cayman Islands, lies 480 miles (768 km) S of Miami. Cayman Brac and Little Cayman are 89 miles (142 km) to the NE of Grand Cayman.Standard Time is 5 hours behind Greenwich Mean Time (GMT-5). The islands remain on Eastern Standard Time without changing to Daylight Saving Time.