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DateAlmanac

What is ACST in AWST?

Australian Western Standard Time is 1 hour 30 minutes behind

Australian Central Time is on UTC+9:30 and Australian Western Standard Time is on UTC+8:00 right now. The gap changes during the year — see below.

Time in Adelaide
10:23:15 PM
Time in Perth
8:53:15 PM
Difference
−1:30 h
Next clock change
October 4, 2026

Convert a time

AWST — Australian Western Standard Time

8:30 pm

AWST, Fri

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 – October 4, 2026Australian Western Standard Time is 1 hour 30 minutes behind
  2. October 4, 2026 – April 4, 2027Australian Western Standard Time is 2 hours 30 minutes behind
  3. April 4, 2027 – October 3, 2027Australian Western Standard Time is 1 hour 30 minutes behind
  4. 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, October 4, 2026

Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on ACDT 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, September 25, 2026, converted from Australian Central Time to Australian Western Standard Time. 2 of the 24 hours fall on a different calendar day in Perth, which is marked.

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

Scheduling between the two

Working hours overlap from 11:00 am to 6:00 pm ACST, which is 9:30 am to 4:30 pm AWST. Anything inside that window falls in the normal working day at both ends.

Australian Central Time (ACST) 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