There are no overlapping standard business hours (9am - 5pm). Use the interactive converter above to visually compare hours side by side.

Adelaide

ACST (GMT+9:30)

ACDT starts on Oct 3, 2026

Washington DC

EDT (GMT-4)

EST starts on Nov 1, 2026

What is the best time to schedule a meeting between Adelaide and Washington DC?

There are no overlapping business hours. Consider early morning or late evening meetings, or use the interactive converter on this page to find a workable time slot.

How many hours apart are Adelaide and Washington DC?

Washington DC is 13.5 hours behind Adelaide.

Does the overlap change with daylight saving time?

Both Adelaide and Washington DC observe daylight saving time. If they transition on different dates, the overlap may temporarily shift. The interactive converter on this page always reflects the current offset, even across daylight saving transition.