What is UTC in ACST?
Australian Central Time is 9 hours 30 minutes ahead
Coordinated Universal Time is on UTC+0:00 and Australian Central Time is on UTC+9:30 right now. The gap changes during the year — see below.
- Time in the prime meridian
- 2:55 am
- Time in Adelaide
- 12:25 pm
- Difference
- +9:30 h
- Next clock change
- October 3, 2026
Convert a time
ACST — Australian Central Time
11:30 am
Wed
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:
- Now – October 3, 2026Australian Central Time is 9 hours 30 minutes ahead
- October 3, 2026 – April 3, 2027Australian Central Time is 10 hours 30 minutes ahead
- April 3, 2027 – October 2, 2027Australian Central Time is 9 hours 30 minutes ahead
- October 2, 2027 – onwardsAustralian Central Time is 10 hours 30 minutes ahead
Periods shorter than a day are not listed: both zones change at 2am in their own local time, so there are a few hours on each transition date when the gap is briefly something else.
Daylight saving
Coordinated Universal Time
Coordinated Universal Time stays on UTC all year, so its offset from UTC never moves.
Australian Central Time
Clocks go forward one hour at 2am local time, becoming ACDT.
UTC to ACST conversion table
Every hour of Wednesday, September 23, 2026, converted from Coordinated Universal Time to Australian Central Time. 9 of the 24 hours fall on a different calendar day in Adelaide, which is marked.
- 12:00 am UTC
- 9:30 am ACST
- 1:00 am UTC
- 10:30 am ACST
- 2:00 am UTC
- 11:30 am ACST
- 3:00 am UTC
- 12:30 pm ACST
- 4:00 am UTC
- 1:30 pm ACST
- 5:00 am UTC
- 2:30 pm ACST
- 6:00 am UTC
- 3:30 pm ACST
- 7:00 am UTC
- 4:30 pm ACST
- 8:00 am UTC
- 5:30 pm ACST
- 9:00 am UTC
- 6:30 pm ACST
- 10:00 am UTC
- 7:30 pm ACST
- 11:00 am UTC
- 8:30 pm ACST
- 12:00 pm UTC
- 9:30 pm ACST
- 1:00 pm UTC
- 10:30 pm ACST
- 2:00 pm UTC
- 11:30 pm ACST
- 3:00 pm UTC
- 12:30 am ACST+1 day
- 4:00 pm UTC
- 1:30 am ACST+1 day
- 5:00 pm UTC
- 2:30 am ACST+1 day
- 6:00 pm UTC
- 3:30 am ACST+1 day
- 7:00 pm UTC
- 4:30 am ACST+1 day
- 8:00 pm UTC
- 5:30 am ACST+1 day
- 9:00 pm UTC
- 6:30 am ACST+1 day
- 10:00 pm UTC
- 7:30 am ACST+1 day
- 11:00 pm UTC
- 8:30 am ACST+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 (ACST) is used in South Australia and the Northern Territory, on a half-hour offset from the east coast