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DateAlmanac

What is UTC in ACST?

Australian Central Time is 10 hours 30 minutes ahead

Coordinated Universal Time is on UTC+0:00 and Australian Central Time is on UTC+10:30 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

ACDT — Australian Central Time

6:30 pm

ACDT, Sat

Time in the prime meridian
8:28:41 AM
Time in Adelaide
6:58:41 PM
Difference
+10:30 h
Next clock change
April 4, 2027

When the difference changes

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

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

Coordinated Universal Time

No clock changes

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

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.

UTC to ACST conversion table

Every hour of Saturday, November 7, 2026, converted from Coordinated Universal Time to Australian Central Time. 10 of the 24 hours fall on a different calendar day in Adelaide, which is marked.

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

Scheduling between the two

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

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

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

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