Atlantic Time

Atlantic Time is a blanket term used to describe multiple time zones including Atlantic Daylight Time (ADT) and Atlantic Standard Time (AST).

Atlantic Daylight Time

Atlantic Daylight Time or ADT has a UTC offset of - 3:00. This means that the time zone is 3 hours behind Coordinated Universal Time. The time zone is primarily observed by areas of North America, and the Caribbean during the summer months when Daylight Saving is active.

Atlantic Standard Time

Atlantic Standard Time or AST has a UTC offset of - 4:00. This means that the time zone is 4 hours behind Coordinated Universal Time. The time zone is primarily observed by areas of North America, and the Caribbean during the winter months when Daylight Saving is inactive.