Convert Atlantic Standard Time to Alaska Standard Time (AST to AKST)

Understanding AST and AKST Time Zones

Atlantic Standard Time (AST)

Atlantic Standard Time is observed in undefined and uses the offset UTC-4. Major cities in this time zone include Halifax, San Juan. This time zone serves a significant global region with important economic and cultural hubs.

Alaska Standard Time (AKST)

Alaska Standard Time operates at UTC-9, covering undefined. Key cities include Anchorage, Fairbanks. The 5-hour backward offset from AST means that when professionals in Halifax start their workday at 9:00 AM, it is already 4:00 AM in Anchorage.

AST is also commonly referred to as Atlantic Time, Puerto Rico time. AKST is also known as Alaska Time, Anchorage time. So if you are searching for Atlantic Time to Alaska Time, this is the same conversion as AST to AKST.

Complete AST to AKST Conversion Table

The table below shows every two-hour increment converted from Atlantic Standard Time to Alaska Standard Time. Business hours (9 AM – 5 PM) are highlighted for easy scheduling reference.

Times shown in 12-hour and 24-hour format. Last updated 2026-03-09.

Scheduling Between AST and AKST

When coordinating deliverables across AST and AKST, set deadlines in the earlier time zone to avoid end-of-day confusion. A "5 PM deadline" should specify which zone to prevent missed deliveries due to the 5-hour offset.

The moderate 5-hour gap between AST and AKST means that there is a partial overlap of business hours. Teams can typically find a 3–4 hour window that works for both sides without requiring anyone to work outside normal hours.

Travel Between Halifax and Anchorage

Flight times between Halifax and Anchorage often appear misleading because of the time zone shift. A departure at 10:00 AM AST arriving at 7:00 PM AKST may look long, but remember to factor in the 5-hour offset.

Medical experts recommend allowing approximately one day of adjustment per hour of time difference. For the 5-hour shift between AST and AKST, plan for about 5 days to fully acclimate.

Daylight Saving Time Considerations

Countries near the equator — including Singapore, most of Africa, and parts of South America — do not observe DST, making their offsets constant year-round. This simplifies scheduling compared to US or European zones.

For the AST to AKST conversion specifically: AST (UTC-4) and AKST (UTC-9) neither observes DST, so the 5-hour offset remains constant throughout the year. This makes scheduling reliable and predictable.

Related Time Zone Conversions

References & Resources

• TimeAndDate.com — World Time Zones
• NIST — Official US Time Standard
• IANA Time Zone Database
• Wikipedia — Time Zone Abbreviations
• WorldTimeServer — Current Times Worldwide

Frequently Asked Questions