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DateAlmanac

What is ACST in UTC?

Coordinated Universal Time is 10 hours 30 minutes behind

Australian Central Time is on UTC+10:30 and Coordinated Universal Time is on UTC+0:00 right now. Australian Central Time is on daylight saving, so its clocks read ACDT. The gap changes during the year — see below.

Convert a time

UTC — Coordinated Universal Time

7:30 am

UTC, Sat

Time in Adelaide
6:59:13 PM
Time in the prime meridian
8:29:13 AM
Difference
−10:30 h
Next clock change
April 4, 2027

When the difference changes

Australian Central Time and Coordinated Universal 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, 2027Coordinated Universal Time is 10 hours 30 minutes behind
  2. April 4, 2027 – October 3, 2027Coordinated Universal Time is 9 hours 30 minutes behind
  3. October 3, 2027 – onwardsCoordinated Universal Time is 10 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.

Coordinated Universal Time

No clock changes

Coordinated Universal Time stays on UTC all year, so its offset from UTC never moves.

ACST to UTC conversion table

Every hour of Saturday, November 7, 2026, converted from Australian Central Time to Coordinated Universal Time. 11 of the 24 hours fall on a different calendar day in the prime meridian, which is marked.

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

Scheduling between the two

There is no overlap between a nine-to-six working day in Adelaide and one in the prime meridian — the gap is too wide. A call has to sit early or late for one side. Early morning in Adelaide is the usual compromise, since that is late afternoon or evening in the prime meridian.

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

Coordinated Universal Time (UTC) is used in aviation, computing, and science worldwide. UTC never changes for daylight saving.

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