About Australian Central Time
Australian Central Time is used in South Australia (with daylight saving in the southern summer) and the Northern Territory (without it).
Daylight saving time
Australian Central Time switches between Australian Central Standard Time (ACST, UTC+9:30) and Australian Central Daylight Time (ACDT, UTC+10:30).
- Sunday, April 5, 2026: clocks go back from 3:00 AM to 2:00 AM (ACST begins)
- Sunday, October 4, 2026: clocks go forward from 2:00 AM to 3:00 AM (ACDT begins)
- Sunday, April 4, 2027: clocks go back from 3:00 AM to 2:00 AM (ACST begins)
- Sunday, October 3, 2027: clocks go forward from 2:00 AM to 3:00 AM (ACDT begins)
Cities on this clock
- Adelaide Australia
ACT vs. other time zones
| Time zone | Now | vs. ACST | Converter |
|---|---|---|---|
| Eastern Time EST/EDT | — | — | |
| Central Time CST/CDT | — | — | |
| Mountain Time MST/MDT | — | — | |
| Pacific Time PST/PDT | — | — | |
| Alaska Time AKST/AKDT | — | — | |
| Hawaii Time HST | — | — | |
| Greenwich Mean Time GMT | — | — | |
| Coordinated Universal Time UTC | — | — | |
| Central European Time CET/CEST | — | — | |
| Eastern European Time EET/EEST | — | — | |
| India Standard Time IST | — | — | |
| Japan Standard Time JST | — | — | |
| Australian Eastern Time AEST/AEDT | — | — | |
| Singapore Time SGT | — | — | |
| Philippine Time PHT | — | — | |
| Moscow Time MSK | — | — | |
| Gulf Standard Time GST | — | — |
Times update live. Plan a meeting across time zones.
Questions
What is the difference between ACST and ACDT?
ACST (Australian Central Standard Time) is the winter time, UTC+9:30. ACDT (Australian Central Daylight Time) is the daylight saving time used in summer, UTC+10:30. People often say ACST all year, but strictly ACDT applies while daylight saving is in effect.
When does Australian Central Time change in 2026?
In 2026, clocks on Australian Central Time go back on Sunday, April 5, 2026 and forward on Sunday, October 4, 2026.
Where is Australian Central Time used?
Australian Central Time is used in South Australia (with daylight saving in the southern summer) and the Northern Territory (without it).
What is ACST in UTC?
ACST is UTC+9:30 and ACDT is UTC+10:30.