AST to AKST Converter & Meeting Planner
Quick answer: 9:00 AM AST = 4:00 AM AKST (fixed -04:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Atlantic Standard Time (AST) and Alaska Standard Time (AKST)? You need to account for the standard time difference. Alaska Standard Time is normally 5 hours behind Atlantic Standard Time. Whether you are coordinating between teams in Halifax and San Juan and Anchorage and Fairbanks, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM AST = 7:00 PM AKST. The full 24-hour AST to AKST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM AST = 10:00 AM AKST.
| AST Time | AKST Time |
|---|---|
| 12:00 AM (00:00) | 7:00 PM (19:00)-1 day |
| 1:00 AM (01:00) | 8:00 PM (20:00)-1 day |
| 2:00 AM (02:00) | 9:00 PM (21:00)-1 day |
| 3:00 AM (03:00) | 10:00 PM (22:00)-1 day |
| 4:00 AM (04:00) | 11:00 PM (23:00)-1 day |
| 5:00 AM (05:00) | 12:00 AM (00:00) |
| 6:00 AM (06:00) | 1:00 AM (01:00) |
| 7:00 AM (07:00) | 2:00 AM (02:00) |
| 8:00 AM (08:00) | 3:00 AM (03:00) |
| 9:00 AM (09:00) | 4:00 AM (04:00) |
| 10:00 AM (10:00) | 5:00 AM (05:00) |
| 11:00 AM (11:00) | 6:00 AM (06:00) |
| 12:00 PM (12:00) | 7:00 AM (07:00) |
| 1:00 PM (13:00) | 8:00 AM (08:00) |
| 2:00 PM (14:00) | 9:00 AM (09:00) |
| 3:00 PM (15:00) | 10:00 AM (10:00) |
| 4:00 PM (16:00) | 11:00 AM (11:00) |
| 5:00 PM (17:00) | 12:00 PM (12:00) |
| 6:00 PM (18:00) | 1:00 PM (13:00) |
| 7:00 PM (19:00) | 2:00 PM (14:00) |
| 8:00 PM (20:00) | 3:00 PM (15:00) |
| 9:00 PM (21:00) | 4:00 PM (16:00) |
| 10:00 PM (22:00) | 5:00 PM (17:00) |
| 11:00 PM (23:00) | 6:00 PM (18:00) |
Best time to call Anchorage from Halifax
For most work calls, compare the normal business day in Halifax (AST) with the business day in Anchorage (AKST). AST commonly covers North America, Caribbean, while AKST is mainly associated with North America, Alaska.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 1:00 PM - 5:00 PM AST, which corresponds to 8:00 AM - 12:00 PM AKST. This window sits inside the typical AST workday (9:00 AM - 5:00 PM) and the AKST workday (8:00 AM - 5:00 PM).
- DST Safety: AST or AKST may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- US Equity Markets (NYSE/NASDAQ) - Local AKST Hours: 05:30-12:00 local time in Anchorage.
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Frequently Asked Questions
What is the time difference between AST and AKST?
During standard time, Alaska Standard Time is 5 hours behind Atlantic Standard Time.
Does the Caribbean observe Daylight Saving Time?
The vast majority of Caribbean nations and territories — including Puerto Rico, the Dominican Republic, the US Virgin Islands, Trinidad and Tobago, and Barbados — do not observe Daylight Saving Time and remain on AST (UTC-4) year-round. This means these territories share the same clock as Halifax only during the Atlantic Standard Time window in winter, diverging by one hour once Canada and Bermuda advance to ADT each spring.
What is the difference between AST and ADT?
AST (Atlantic Standard Time) is the standard winter offset at UTC-4:00, observed from the first Sunday in November through the second Sunday in March across all AST regions. ADT (Atlantic Daylight Time) is the summer offset at UTC-3:00, applied by Eastern Canadian provinces and Bermuda when they advance their clocks by one hour during Daylight Saving Time.
Does Alaska observe Daylight Saving Time?
Most of Alaska observes Daylight Saving Time, transitioning from Alaska Standard Time (AKST, UTC-09:00) to Alaska Daylight Time (AKDT, UTC-08:00) on the second Sunday in March. Clocks revert to AKST on the first Sunday in November, following the same DST schedule as the contiguous United States.
Is all of Alaska on Alaska Standard Time?
Almost all of Alaska uses AKST, but the westernmost Aleutian Island communities — those located west of 169° 30′ W longitude — observe Hawaii-Aleutian Time (HST, UTC-10:00) instead. This exception reflects their extreme western geographic position, which places them closer in solar time to Hawaii than to Anchorage.