Australian Central Daylight Time (ACDT)
ACDT is UTC+10:30. Current Australian Central Time (Adelaide) and when ACDT applies.
Australian Central Time (Adelaide) now
--:--:--
Sunday, September 20, 2026
ACSTUTC+9:30
Australian Central Time is on ACST right now, not ACDT
About ACDT
- Full Name
- Australian Central Daylight Time
- Abbreviation
- ACDT
- UTC Offset
- UTC+10:30
- Australian Central Time is on
- Standard Time (ACST)
- Daylight Saving Time
- Australian Central Time: Starts Oct 4, 2026 · switches between ACST and ACDT
Australian Central Daylight Time (ACDT) is UTC+10:30, used in South Australia and Broken Hill during daylight saving time, from the first Sunday in October to the first Sunday in April. The rest of the year they use Australian Central Standard Time (ACST, UTC+9:30).
Where ACDT is used
Switches between ACST and ACDT
- South Australia (Adelaide) and Broken Hill, New South Wales
Major Cities in Australian Central Time
Each city shows its own current abbreviation, so places on daylight saving time are labelled accordingly.
ACDT vs Other Time Zones
| Comparison | By definition | Right now (local clocks) |
|---|---|---|
| ACDT to ACST | -1 hour | Same region |
| ACDT to AEDT | +30 minutes | +30 minutes |
| ACDT to AEST | -30 minutes | +30 minutes |
| ACDT to UTC | -10 hours 30 minutes | -9 hours 30 minutes |
“By definition” compares the fixed offsets of the abbreviations. “Right now” compares the actual local time in each region today, including daylight saving time.
ACDT FAQs
What is ACDT?
Australian Central Daylight Time (ACDT) is UTC+10:30, used in South Australia and Broken Hill during daylight saving time, from the first Sunday in October to the first Sunday in April. The rest of the year they use Australian Central Standard Time (ACST, UTC+9:30).
What is the UTC offset of ACDT?
ACDT is always UTC+10:30. When Australian Central Time is not on daylight saving time, it uses ACST (UTC+9:30) instead.
Is it ACDT or ACST right now?
Australian Central Time is on ACST right now, not ACDT. ACST is UTC+9:30, 1 hour behind ACDT (UTC+10:30). Australian Central Time switches to ACDT on Sunday, October 4, 2026 at 2:00 AM.
When does Australian Central Time switch between ACST and ACDT?
In 2026, Australian Central Time leaves daylight saving time on Sunday, April 5, 2026 at 3:00 AM and returns to ACDT on Sunday, October 4, 2026 at 2:00 AM.
Is ACDT used all year anywhere?
No major region uses ACDT all year. It is only in effect during daylight saving time; the rest of the year the same places use ACST.