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ACST Time Zone — ACST (UTC+09:30)

ACST runs on Australian Central Standard Time at UTC+09:30. It is currently on standard time (UTC+09:30), and moves to daylight saving time (UTC+10:30) on Sat, Oct 3, 2026. Convert ACST time to any city below, or use the full converter.

Current UTC offset
UTC+09:30
IANA zone
Australia/Adelaide
Daylight saving
Observed — clocks currently standard
Zone abbreviation
ACST

About the ACST time zone

Australian Central Standard Time (ACST) is the half-hour offset of UTC+09:30 used across South Australia and the Northern Territory, taking in Adelaide and Darwin. South Australia moves to Australian Central Daylight Time (ACDT, UTC+10:30) from the first Sunday in October to the first Sunday in April, but the Northern Territory does not observe daylight saving — so Adelaide and Darwin sit 30 minutes apart in summer and level with each other in winter. The half-hour offset means Adelaide is 30 minutes behind Sydney in winter and level with it during daylight saving, which regularly catches out travellers and meeting planners.

Countries on ACST
Australia (South Australia, Northern Territory)
Major cities on ACST
AdelaideDarwinAlice SpringsMount Gambier

Convert ACST time to another city

Convert another city's time to ACST

Convert ACST time to a time zone abbreviation

Convert ACST time to a country

Learn more about time zones