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What is ACST in AWST?

Australian Western Standard Time is 2 hours 30 minutes behind

Australian Central Time is on UTC+10:30 and Australian Western Standard Time is on UTC+8:00 right now. Australian Central Time is on daylight saving, so its clocks read ACDT. The gap changes during the year — see below.

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AWST — Australian Western Standard Time

5:30 pm

AWST, Fri

Time in Adelaide
8:48:44 PM
Time in Perth
6:18:44 PM
Difference
−2:30 h
Next clock change
April 4, 2027

When the difference changes

Australian Central Time and Australian Western Standard Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:

  1. Now – April 4, 2027Australian Western Standard Time is 2 hours 30 minutes behind
  2. April 4, 2027 – October 3, 2027Australian Western Standard Time is 1 hour 30 minutes behind
  3. October 3, 2027 – onwardsAustralian Western Standard Time is 2 hours 30 minutes behind

Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.

Daylight saving

Australian Central Time

Sunday, April 4, 2027

Clocks go back one hour — 3:00 am becomes 2:00 am local time, and the zone is on ACST after that.

Australian Western Standard Time

No clock changes

Australian Western Standard Time stays on AWST all year, so its offset from UTC never moves.

ACST to AWST conversion table

Every hour of Friday, November 13, 2026, converted from Australian Central Time to Australian Western Standard Time. 3 of the 24 hours fall on a different calendar day in Perth, which is marked.

12:00 am ACDT
9:30 pm AWST−1 day
1:00 am ACDT
10:30 pm AWST−1 day
2:00 am ACDT
11:30 pm AWST−1 day
3:00 am ACDT
12:30 am AWST
4:00 am ACDT
1:30 am AWST
5:00 am ACDT
2:30 am AWST
6:00 am ACDT
3:30 am AWST
7:00 am ACDT
4:30 am AWST
8:00 am ACDT
5:30 am AWST
9:00 am ACDT
6:30 am AWST
10:00 am ACDT
7:30 am AWST
11:00 am ACDT
8:30 am AWST
12:00 pm ACDT
9:30 am AWST
1:00 pm ACDT
10:30 am AWST
2:00 pm ACDT
11:30 am AWST
3:00 pm ACDT
12:30 pm AWST
4:00 pm ACDT
1:30 pm AWST
5:00 pm ACDT
2:30 pm AWST
6:00 pm ACDT
3:30 pm AWST
7:00 pm ACDT
4:30 pm AWST
8:00 pm ACDT
5:30 pm AWST
9:00 pm ACDT
6:30 pm AWST
10:00 pm ACDT
7:30 pm AWST
11:00 pm ACDT
8:30 pm AWST

Scheduling between the two

Working hours overlap from 12:00 pm to 6:00 pm ACDT, which is 9:30 am to 3:30 pm AWST. Anything inside that window falls in the normal working day at both ends.

Australian Central Time (ACDT) is used in South Australia and the Northern Territory, on a half-hour offset from the east coast

Australian Western Standard Time (AWST) is used in Western Australia, which does not observe daylight saving

Other conversions