EST to Adelaide Converter

Standard business hours (9 AM–5 PM, Mon–Fri) in Eastern Time and Adelaide don't overlap on the same weekday. Adelaide is 14 hours ahead of Eastern Time.

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

• 6 PM–8 PM in Eastern Time (7 AM–9 AM the next day in Adelaide) — suggest 7:00 PM Eastern Time (8:30 AM Adelaide).

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

Eastern Time is also known as EST, or EDT. To call United States, dial +1.

Adelaide uses Australian Central Time (ACST, or ACDT). To call Australia, dial +61.

Adelaide is approximately 10,600 miles west of Eastern Time.

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

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

Adelaide: next transition on Sunday, October 4, 2026.

Eastern Time and Adelaide 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.