What is Atlantic time zone?

The Atlantic Time Zone is a geographical region that keeps standard time—called Atlantic Standard Time (AST)—by subtracting four hours from Coordinated Universal Time (UTC), resulting in UTC-4; during part of the year some parts of it observe daylight saving time by instead subtracting only three hours (UTC-3). read more

Atlantic Standard Time (AST) is 4 hours behind Coordinated Universal Time (UTC). This time zone is in use during standard time in: North America, Atlantic, Caribbean. This time zone is often called Atlantic Time Zone. read more

The Atlantic Time Zone is a geographical region that keeps standard time—called Atlantic Standard Time (AST)—by subtracting four hours from Coordinated Universal Time , resulting in UTC-4; during part of the year some parts of it observe daylight saving time by instead subtracting only three hours . read more

In most provinces in Canada, Daylight Saving Time (DST) is observed. During DST the time is shifted forward by 1 hour to ADT, which is 3 hours behind Greenwich Mean Time (GMT-3). read more