This page provides the exact current time in Atlantic Daylight Time (ADT) and Atlantic Standard Time (AST). The live interactive clock above updates automatically every second to give you the most accurate Atlantic Time, making it easy to schedule meetings, coordinate international calls, or plan travel across the Atlantic Time Zone.
What is Atlantic Daylight Time (ADT)?
Atlantic Daylight Time (ADT) is the time zone observed in the easternmost parts of North America during the warmer months when daylight saving time is active. ADT is 3 hours behind Coordinated Universal Time (UTC-3:00). When standard time resumes in the winter, the region switches back to Atlantic Standard Time (AST), which is 4 hours behind UTC (UTC-4:00).
Major locations that observe Atlantic Time include the Canadian provinces of Nova Scotia, New Brunswick, and Prince Edward Island, as well as parts of Labrador. Other regions like Puerto Rico and the U.S. Virgin Islands observe Atlantic Standard Time (AST) year-round and do not switch to ADT. Our live clock automatically detects the current season and adjusts itself to display the correct active time for the region.
ADT & AST Time Difference
Understanding the time difference between Atlantic Time and other major global time zones can help avoid scheduling conflicts:
- ADT is 3 hours behind GMT/UTC, while AST is 4 hours behind GMT/UTC.
- Atlantic Time is normally 1 hour ahead of Eastern Time (ET).
- Atlantic Time is normally 4 hours ahead of Pacific Time (PT).
- ADT is 8 hours 30 minutes behind Indian Standard Time (IST), while AST is 9 hours 30 minutes behind IST.
Frequently Asked Questions
What is the time in ADT right now?
The precise current time in the Atlantic Time Zone is displayed on the live interactive clock at the top of this page. It ticks in real-time, matching the official time in regions like Halifax, Nova Scotia.
Does the Atlantic Time Zone observe Daylight Saving Time?
Yes, most parts of the Atlantic Time Zone observe daylight saving time, switching to Atlantic Daylight Time (ADT) between mid-March and early November. However, some areas, such as Puerto Rico, remain on Atlantic Standard Time (AST) all year long.
What does ADT stand for?
ADT stands for Atlantic Daylight Time. During the winter months, when daylight saving time is not in effect, it is referred to as AST (Atlantic Standard Time) or simply AT (Atlantic Time).