Current time in ACST
ACST is UTC+9:30, used across South Australia and the Northern Territory. The clock below runs at that offset rather than at any one city's local time, because an abbreviation names an offset: when the region switches for the summer, the city moves and ACST stays where it is.
8:47:44 PM
Wednesday, October 7, 2026
- Offset
- Australia/Adelaide
- UTC offset
- UTC+10:30
- 10:30 h ahead of your time
South Australia and the Northern Territory is not on ACST at the moment, so local time there is currently an hour away from this clock. The offset itself does not change: ACST is always UTC+9:30.
Need to convert a specific date and time between zones? Use the timezone converter.
How it works
The offset comes from the IANA time zone database rather than a table we typed out, read through the Australia/Adelaide entry, so it follows the same data your operating system uses and cannot drift out of date on its own.
ACST and ACDT are the two halves of the same region's year. Clocks move between them on the changeover dates; the offsets themselves never move.
Frequently asked questions
Does ACST change with daylight saving?
No. ACST is always UTC+9:30; what changes is which regions are using it. South Australia and the Northern Territory switches to its other abbreviation for part of the year, and a clock in that region moves with the switch while ACST stays put.
Does ACST mean only one thing?
Here, yes: these letters map to one offset, UTC+9:30, used by South Australia and the Northern Territory. That is not true of every abbreviation, which is why the safe habit for scheduling is to write the offset or the IANA zone name alongside the letters.
How do I convert a meeting time into ACST?
Use the timezone converter linked above: pick the source zone and read the result. Doing it in your head is where mistakes come from, because you have to remember both sides' switch dates as well as the offsets, and the two hemispheres do not switch on the same weekends.