Offset
The time difference between Washington and Adelaide is 13.5 hours.
Washington (EDT) is behind Adelaide (ACST).
EDT: UTC-4
ACST: UTC+9:30
Washington is currently observing daylight saving time; Adelaide is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Washington and Adelaide don't overlap on the same weekday. Adelaide is 14 hours ahead of Washington.
With some flexibility, there’s a workable window outside standard hours:
- 6 PM–8 PM in Washington (7 AM–9 AM the next day in Adelaide) — suggest 7:00 PM Washington (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.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
Australia
- New Year's DayThu, Jan 1
- Australia DayMon, Jan 26
- Good FridayFri, Apr 3
- Easter MondayMon, Apr 6
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
About these zones
Washington uses Eastern Time (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 10,450 miles west of Washington.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Washington | Adelaide | Day |
|---|---|---|
| 12:00 am | 1:30 pm | Same day |
| 1:00 am | 2:30 pm | Same day |
| 2:00 am | 3:30 pm | Same day |
| 3:00 am | 4:30 pm | Same day |
| 4:00 am | 5:30 pm | Same day |
| 5:00 am | 6:30 pm | Same day |
| 6:00 am | 7:30 pm | Same day |
| 7:00 am | 8:30 pm | Same day |
| 8:00 am | 9:30 pm | Same day |
| 9:00 am | 10:30 pm | Same day |
| 10:00 am | 11:30 pm | Same day |
| 11:00 am | 12:30 am | +1 day |
| 12:00 pm | 1:30 am | +1 day |
| 1:00 pm | 2:30 am | +1 day |
| 2:00 pm | 3:30 am | +1 day |
| 3:00 pm | 4:30 am | +1 day |
| 4:00 pm | 5:30 am | +1 day |
| 5:00 pm | 6:30 am | +1 day |
| 6:00 pm | 7:30 am | +1 day |
| 7:00 pm | 8:30 am | +1 day |
| 8:00 pm | 9:30 am | +1 day |
| 9:00 pm | 10:30 am | +1 day |
| 10:00 pm | 11:30 am | +1 day |
| 11:00 pm | 12:30 pm | +1 day |
Daylight saving time
Both zones observe daylight saving time, but they transition on different dates.
Washington: next transition on Sunday, November 1, 2026.
Adelaide: next transition on Sunday, October 4, 2026.
Washington 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.
Daylight today
- Sunrise
- 5:44 AM
- Sunset
- 8:32 PM
- Day length
- 14h 48m
- Sunrise
- 7:19 AM
- Sunset
- 5:12 PM
- Day length
- 9h 53m
Daylight overlap: 2h 43m — 5:49 PM–8:32 PM in Washington (7:19 AM–10:02 AM in Adelaide). Both locations are in daylight during this window.
Cities in these zones
Other cities in Eastern Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Eastern Time
- EWR
- HPN
- JFK
- LGA
- TEB
- ILG
- PHL
- TTN
- CLT
- USA
Airports in Australian Central Time
- ADL
Related conversions
Common conversions
- What is 9:00 am Washington in Adelaide?
- 9:00 am Washington is 10:30 pm Adelaide.
- What is 12:00 pm Washington in Adelaide?
- 12:00 pm Washington is 1:30 am Adelaide, the next day.
- What is 12:30 pm Washington in Adelaide?
- 12:30 pm Washington is 2:00 am Adelaide, the next day.
- What is 2:00 pm Washington in Adelaide?
- 2:00 pm Washington is 3:30 am Adelaide, the next day.
- What is 5:00 pm Washington in Adelaide?
- 5:00 pm Washington is 6:30 am Adelaide, the next day.
- What is 11:30 pm Washington in Adelaide?
- 11:30 pm Washington is 1:00 pm Adelaide, the next day.