ACST: Australian Central Time
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ACST: Australian Central Time
ACST stands for Australian Central Time, used in central Australia. It runs UTC+10:30 in the northern winter and UTC+9:30 in summer, because the clocks change for daylight saving time.
Current ACST time
Local times come from your browser's IANA time zone data.
ACST time compared with UTC
ACST runs UTC+10:30 in January and UTC+9:30 in July. When it is 12:00 UTC the clock in ACST reads 22:30 in January and 21:30 in July.
| UTC | ACST in January | ACST in July |
|---|---|---|
| 00:00 | 10:30 | 09:30 |
| 03:00 | 13:30 | 12:30 |
| 06:00 | 16:30 | 15:30 |
| 09:00 | 19:30 | 18:30 |
| 12:00 | 22:30 | 21:30 |
| 15:00 | 01:30 next day | 00:30 next day |
| 18:00 | 04:30 next day | 03:30 next day |
| 21:00 | 07:30 next day | 06:30 next day |
When the clocks change in the ACST zone
Clocks in the ACST zone change twice a year for daylight saving time. Each row gives the date, the reading the clock shows as it changes, and what it jumps to.
| Date | Change | Clocks | New offset |
|---|---|---|---|
| Sunday, April 5, 2026 | Back one hour | 03:00 to 02:00 | UTC+9:30 |
| Sunday, October 4, 2026 | Forward one hour | 02:00 to 03:00 | UTC+10:30 |
| Sunday, April 4, 2027 | Back one hour | 03:00 to 02:00 | UTC+9:30 |
| Sunday, October 3, 2027 | Forward one hour | 02:00 to 03:00 | UTC+10:30 |
Computed from the IANA time zone database, the same source your operating system uses. Dates in future years follow the rules in force today; daylight saving law is set by governments and does change, sometimes at a few months' notice.
Cities that keep ACST
These places run on ACST: Australian Central Time, the IANA zone behind ACST. Each links to its own live clock.
Convert ACST to another zone
ACST to PSTACST to MSTACST to CSTACST to ESTACST to HSTACST to GMTACST to UTCACST to BST
Common questions about ACST
What does ACST stand for?
ACST is Australian Central Time, the civil time used in central Australia. On this site it resolves to the IANA time zone ACST: Australian Central Time, which is what your operating system and browser use to work out the actual offset on any given date.
What is ACST in UTC?
ACST is UTC+10:30 during the standard-time part of the year and UTC+9:30 while daylight saving is in effect. The table above converts every UTC hour both ways.