AST stands for Atlantic Standard Time. It is UTC-4 from Coordinated Universal Time (UTC).AST is used in the North America region and corresponds to the America/Halifax IANA timezone.
AST stands for Atlantic Standard Time. It is UTC-4 from Coordinated Universal Time (UTC).
The UTC offset for Atlantic Standard Time (AST) is UTC-4. This means AST is -4 hours from Coordinated Universal Time.
AST is used by locations in the America/Halifax timezone region (North America). Use the converter below to convert AST to other time zones like EST, PST, or GMT.
UTC-4
When it's 09:57:30 PM in AST, here's the time in other major cities:
Scheduling meetings with teams in Atlantic Standard Time? Here are the recommended windows:
AST stands for Atlantic Standard Time. It is UTC-4 from Coordinated Universal Time (UTC).
The current time in Atlantic Standard Time (AST) is 09:57:30 PM on Wednesday, March 11, 2026.AST is UTC-4. This page displays a live, automatically updating clock for AST.
Major cities using AST include Halifax, and more. AST is observed in 1 countries including Canada.
Yes, regions using AST typically switch to ADT (Atlantic Daylight Time) during daylight saving time. DST usually begins on the second Sunday in March and ends on the first Sunday in November in the United States.
To convert AST to Eastern Standard Time (EST), you need to account for the UTC offset difference.AST is UTC-4, while EST is UTC-5. Use our time zone converter for instant, accurate conversions.
The best time to schedule a meeting in AST is during standard business hours: 9:00 AM to 5:00 PM AST. For cross-timezone meetings, use our meeting planner to find optimal overlap times.
The UTC offset for Atlantic Standard Time (AST) is UTC-4. This means AST is -4 hours from Coordinated Universal Time. During daylight saving time, this changes to UTC-3.
AST is -4 hours from GMT (Greenwich Mean Time). GMT and UTC are effectively the same for time zone calculations. So when it's 12:00 PM (noon) in GMT, it's 8:00 AM in AST.