Convert Atlantic Standard Time to Coordinated Universal Time - Quick & Accurate
Updates live every second
Hover over any hour to see corresponding time in both zones
To schedule a meeting between AST and UTC:
Pro Tip: Schedule calls during the overlap window for optimal convenience for both time zones
| AST Time | UTC Time | Context |
|---|---|---|
| 12:00 AM | 04:00 AM | Midnight AST |
| 01:00 AM | 05:00 AM | Late Night |
| 02:00 AM | 06:00 AM | Late Night |
| 03:00 AM | 07:00 AM | Late Night |
| 04:00 AM | 08:00 AM | Late Night |
| 05:00 AM | 09:00 AM | Late Night |
| 06:00 AM | 10:00 AM | Early Morning AST |
| 07:00 AM | 11:00 AM | Night Time |
| 08:00 AM | 12:00 PM | Night Time |
| 09:00 AM | 01:00 PM | Work Starts AST |
| 10:00 AM | 02:00 PM | Night Time |
| 11:00 AM | 03:00 PM | Night Time |
Halifax
America/Halifax
UTC
UTC
UTC (Coordinated Universal Time) is 4 hours ahead of AST (Atlantic Standard Time). This means when it's 12:00 PM in Halifax (AST), it's 4:00 PM in UTC (UTC).
The best time to call from AST to UTC is during overlapping business hours. For AST callers, schedule between 9:00 AM - 12:00 PM AST to ensure both parties are within standard business hours.
The time difference may change during daylight saving transitions if one region observes DST while the other doesn't. Atlantic Standard Time (UTC-4 (AST) / UTC-3 (ADT)) and Coordinated Universal Time (UTC+0) may have different DST schedules.
AST includes cities like Halifax. UTC includes cities like UTC. Both time zones cover important business and cultural centers.
In 2025, DST in North America starts on March 9 at 2:00 AM and ends on November 2 at 2:00 AM. Other regions may have different DST schedules or not observe DST at all.