Convert Coordinated Universal Time to Atlantic Standard Time - Quick & Accurate
Updates live every second
Hover over any hour to see corresponding time in both zones
To schedule a meeting between UTC and AST:
Pro Tip: Schedule calls during the overlap window for optimal convenience for both time zones
| UTC Time | AST Time | Context |
|---|---|---|
| 12:00 AM | 08:00 PM | Midnight UTC |
| 01:00 AM | 09:00 PM | Late Night |
| 02:00 AM | 10:00 PM | Late Night |
| 03:00 AM | 11:00 PM | Late Night |
| 04:00 AM | 12:00 AM | Late Night |
| 05:00 AM | 01:00 AM | Late Night |
| 06:00 AM | 02:00 AM | Early Morning UTC |
| 07:00 AM | 03:00 AM | Night Time |
| 08:00 AM | 04:00 AM | Night Time |
| 09:00 AM | 05:00 AM | Work Starts UTC |
| 10:00 AM | 06:00 AM | Night Time |
| 11:00 AM | 07:00 AM | Night Time |
UTC
UTC
Halifax
America/Halifax
AST (Atlantic Standard Time) is 4 hours behind UTC (Coordinated Universal Time). This means when it's 12:00 PM in UTC (UTC), it's 8:00 AM in Halifax (AST).
The best time to call from UTC to AST is during overlapping business hours. For UTC callers, schedule between 12:00 PM - 5:00 PM UTC 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. Coordinated Universal Time (UTC+0) and Atlantic Standard Time (UTC-4 (AST) / UTC-3 (ADT)) may have different DST schedules.
UTC includes cities like UTC. AST includes cities like Halifax. 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.