Convert Pacific Time to Atlantic Standard Time - Quick & Accurate
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Hover over any hour to see corresponding time in both zones
To schedule a meeting between PT and AST:
Pro Tip: Schedule calls during the overlap window for optimal convenience for both time zones
| PT Time | AST Time | Context |
|---|---|---|
| 12:00 AM | 04:00 AM | Midnight PT |
| 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 PT |
| 07:00 AM | 11:00 AM | Night Time |
| 08:00 AM | 12:00 PM | Night Time |
| 09:00 AM | 01:00 PM | Work Starts PT |
| 10:00 AM | 02:00 PM | Night Time |
| 11:00 AM | 03:00 PM | Night Time |
Los Angeles
America/Los_Angeles
Halifax
America/Halifax
AST (Atlantic Standard Time) is 4 hours ahead of PT (Pacific Time). This means when it's 12:00 PM in Los Angeles (PT), it's 4:00 PM in Halifax (AST).
The best time to call from PT to AST is during overlapping business hours. For PT callers, schedule between 9:00 AM - 12:00 PM PT 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. Pacific Time (UTC-8 (PST) / UTC-7 (PDT)) and Atlantic Standard Time (UTC-4 (AST) / UTC-3 (ADT)) may have different DST schedules.
PT includes cities like Los Angeles. 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.