AST-ATLANTIC to AEST Converter

Standard business hours (9 AM–5 PM, Mon–Fri) in Atlantic Time and Australian Eastern Time don't overlap on the same weekday. Australian Eastern Time is 13 hours ahead of Atlantic Time.

With some flexibility, there’s a workable window outside standard hours:

• 6 PM–8 PM in Atlantic Time (7 AM–9 AM the next day in Australian Eastern Time) — suggest 7:00 PM Atlantic Time (8:00 AM Australian Eastern Time).

This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.

Atlantic Time is also known as AST, or ADT. To call Canada, dial +1.

Australian Eastern Time is also known as AEST, or AEDT. To call Australia, dial +61.

Australian Eastern Time is approximately 10,450 miles west of Atlantic Time.

Both zones observe daylight saving time, but they transition on different dates.

Atlantic Time: next transition on Sunday, November 1, 2026.

Australian Eastern Time: next transition on Sunday, October 4, 2026.

Atlantic Time and Australian Eastern Time are in opposite hemispheres, so their clocks change in opposite directions about six months apart — one springs forward while the other falls back. The offset between them therefore shifts twice a year and can swing by up to two hours across the seasons, more than a typical same-hemisphere pair. Recurring meetings will need re-checking after each transition.

See the daylight saving time page for transition dates across every time zone.