AWST to AST Converter
AST is 12 hours behind AWST. 9:00 AM AWST = 9:00 PM AST (previous day).
AST is 12 hours behind AWST at the moment. To convert AWST to AST, subtract 12 hours from the AWST time: 9:00 AM AWST = 9:00 PM AST (previous day).
AWST (Australian Western Time) is used in Western Australia (Perth). AST (Atlantic Time) is used in Nova Scotia, New Brunswick, PEI; Puerto Rico and the Eastern Caribbean (all year).
AST here is Atlantic Standard Time, not Arabia Standard Time.
AWST to AST time conversion table
AWST to AST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| AWST | AST | Day |
|---|---|---|
| 12:00 AM AWST | 12:00 PM AST | previous day |
| 1:00 AM AWST | 1:00 PM AST | previous day |
| 2:00 AM AWST | 2:00 PM AST | previous day |
| 3:00 AM AWST | 3:00 PM AST | previous day |
| 4:00 AM AWST | 4:00 PM AST | previous day |
| 5:00 AM AWST | 5:00 PM AST | previous day |
| 6:00 AM AWST | 6:00 PM AST | previous day |
| 7:00 AM AWST | 7:00 PM AST | previous day |
| 8:00 AM AWST | 8:00 PM AST | previous day |
| 9:00 AM AWST | 9:00 PM AST | previous day |
| 10:00 AM AWST | 10:00 PM AST | previous day |
| 11:00 AM AWST | 11:00 PM AST | previous day |
| 12:00 PM AWST | 12:00 AM AST | night |
| 1:00 PM AWST | 1:00 AM AST | night |
| 2:00 PM AWST | 2:00 AM AST | night |
| 3:00 PM AWST | 3:00 AM AST | night |
| 4:00 PM AWST | 4:00 AM AST | night |
| 5:00 PM AWST | 5:00 AM AST | night |
| 6:00 PM AWST | 6:00 AM AST | — |
| 7:00 PM AWST | 7:00 AM AST | — |
| 8:00 PM AWST | 8:00 AM AST | — |
| 9:00 PM AWST | 9:00 AM AST | — |
| 10:00 PM AWST | 10:00 AM AST | — |
| 11:00 PM AWST | 11:00 AM AST | — |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert AWST to AST
Subtract 12 hours from the AWST time to get AST.
Example: 9:00 AM AWST = 9:00 PM AST (previous day).
Across midnight: 1:00 AM AWST = 1:00 PM AST (previous day). The date changes, so always check the day as well as the hour.
Time difference between AWST and AST
The time difference between AWST and AST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 1 Jan 2026 – 7 Mar 2026: AST is 12 hours behind of AWST.
- 8 Mar 2026 – 31 Oct 2026: AST is 11 hours behind of AWST.
- 1 Nov 2026 – 31 Dec 2026: AST is 12 hours behind of AWST.
AWST and AST during daylight saving time
- AWST does not observe daylight saving time; it stays on UTC+8 all year.
- AST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from AST (UTC−4) to ADT (UTC−3).
Best time for a meeting between AWST and AST
AWST and AST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM AWST, which is 7:00 PM AST.
AWST to AST FAQ
What is the time difference between AWST and AST?
Right now AST is 12 hours behind AWST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM AWST in AST?
9:00 AM AWST is 9:00 PM AST (previous day).
What is 12 PM (noon) AWST in AST?
12:00 PM AWST is 12:00 AM AST.
Is AST ahead of or behind AWST?
AST is 12 hours behind AWST, so it is earlier in AST than in AWST.
Does AWST change for daylight saving time?
No. AWST stays on the same offset all year, so conversions never shift for daylight saving time.
Does AST change for daylight saving time?
Yes. AST next changes on 14 Mar 2027, when clocks go forward one hour from AST to ADT.
What is the best time for a meeting between AWST and AST?
AWST and AST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM AWST, which is 7:00 PM AST.
Related conversions
Convert AST to AWST
Convert AWST to other time zones
Convert other time zones to AST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.