Offset
The time difference between Australian Western Time and Atlantic Time is 11 hours.
Australian Western Time (AWST) is ahead of Atlantic Time (ADT).
AWST: UTC+8
ADT: UTC-3
Atlantic Time is currently observing daylight saving time; Australian Western Time is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Australian Western Time and Atlantic Time don't overlap on the same weekday. Atlantic Time is 11 hours behind Australian Western Time.
With some flexibility, there’s a workable window outside standard hours:
- 6 PM–8 PM in Australian Western Time (7 AM–9 AM in Atlantic Time) — suggest 7:00 PM Australian Western Time (8:00 AM Atlantic Time).
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.
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
Canada
- New Year's DayThu, Jan 1
- Good FridayFri, Apr 3
- Victoria DayMon, May 18
- Canada DayWed, Jul 1
- Labour DayMon, Sep 7
- National Day for Truth and ReconciliationWed, Sep 30
- ThanksgivingMon, Oct 12
- Christmas DayFri, Dec 25
About these zones
Australian Western Time is also known as AWST. To call Australia, dial +61.
Atlantic Time is also known as AST, or ADT. To call Canada, dial +1.
Atlantic Time is approximately 11,550 miles north of Australian Western Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| AWST | AST-ATLANTIC | Day |
|---|---|---|
| 12:00 am | 1:00 pm | -1 day |
| 1:00 am | 2:00 pm | -1 day |
| 2:00 am | 3:00 pm | -1 day |
| 3:00 am | 4:00 pm | -1 day |
| 4:00 am | 5:00 pm | -1 day |
| 5:00 am | 6:00 pm | -1 day |
| 6:00 am | 7:00 pm | -1 day |
| 7:00 am | 8:00 pm | -1 day |
| 8:00 am | 9:00 pm | -1 day |
| 9:00 am | 10:00 pm | -1 day |
| 10:00 am | 11:00 pm | -1 day |
| 11:00 am | 12:00 am | Same day |
| 12:00 pm | 1:00 am | Same day |
| 1:00 pm | 2:00 am | Same day |
| 2:00 pm | 3:00 am | Same day |
| 3:00 pm | 4:00 am | Same day |
| 4:00 pm | 5:00 am | Same day |
| 5:00 pm | 6:00 am | Same day |
| 6:00 pm | 7:00 am | Same day |
| 7:00 pm | 8:00 am | Same day |
| 8:00 pm | 9:00 am | Same day |
| 9:00 pm | 10:00 am | Same day |
| 10:00 pm | 11:00 am | Same day |
| 11:00 pm | 12:00 pm | Same day |
Daylight saving time
Atlantic Time observes daylight saving time; Australian Western Time does not. The offset between the two zones changes when Atlantic Time transitions: on Sunday, November 1, 2026, clocks fall back from ADT to AST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 7:11 AM
- Sunset
- 5:20 PM
- Day length
- 10h 9m
- Sunrise
- 5:31 AM
- Sunset
- 8:56 PM
- Day length
- 15h 25m
Daylight overlap: 49m — 4:31 PM–5:20 PM in Australian Western Time (5:31 AM–6:20 AM in Atlantic Time). Both locations are in daylight during this window.
Cities in these zones
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Australian Western Time
- PER
Airports in Atlantic Time
- YHZ
Related conversions
Common conversions
- What is 9:00 am AWST in AST-ATLANTIC?
- 9:00 am AWST is 10:00 pm AST-ATLANTIC, the previous day.
- What is 12:00 pm AWST in AST-ATLANTIC?
- 12:00 pm AWST is 1:00 am AST-ATLANTIC.
- What is 12:30 pm AWST in AST-ATLANTIC?
- 12:30 pm AWST is 1:30 am AST-ATLANTIC.
- What is 2:00 pm AWST in AST-ATLANTIC?
- 2:00 pm AWST is 3:00 am AST-ATLANTIC.
- What is 5:00 pm AWST in AST-ATLANTIC?
- 5:00 pm AWST is 6:00 am AST-ATLANTIC.
- What is 11:30 pm AWST in AST-ATLANTIC?
- 11:30 pm AWST is 12:30 pm AST-ATLANTIC.