Time zone
ACDT
Australian Central Daylight Time
Australian Central Daylight Time (ACDT) covers South Australia and parts of New South Wales, built around Adelaide and Broken Hill. It’s a half‑hour ahead of standard time during daylight saving, but during standard time clocks sit at UTC+09:30 — a rare 30‑minute offset you’ll only find in a few places on Earth. Living or collaborating here means your meeting invites need to respect both DST and that quirky 30‑minute jog.
Wednesday, June 17, 2026
Current offset
UTC+09:30
Standard · ACST
Daylight saving
Not observed
Year-round standard time
IANA zones
0
None observe daylight saving
DST offset
—
No summer variant
About ACDT
A fixed, year-round offset.
Australian Central Daylight Time (ACDT) covers South Australia and parts of New South Wales, built around Adelaide and Broken Hill. It’s a half‑hour ahead of standard time during daylight saving, but during standard time clocks sit at UTC+09:30 — a rare 30‑minute offset you’ll only find in a few places on Earth. Living or collaborating here means your meeting invites need to respect both DST and that quirky 30‑minute jog.
Same offset · UTC+09:30
Other zones at UTC+09:30 right now.
These named zones share ACDT's offset today. When daylight saving rules differ, they drift apart for part of the year.
Convert
ACDT to the world's clocks.
Frequently asked questions
Common questions about ACDT, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].
- Which places follow Australian Central Time?
- Australian Central Time is kept by Adelaide and Broken Hill. This region is special because it uses a 30‑minute summer jump, not a whole hour.
- When do clocks change?
- Clocks move forward to daylight saving time and then back again. The next local change happens on 2026-10-04 03:00:00 ACST.
- Is Australian Central Time a full‑hour offset?
- No — even outside daylight saving the offset is UTC+09:30, which is a half‑hour ahead. It makes time math a little more interesting.
- Does the whole region observe daylight saving?
- Every listed zone in Australian Central Time flips between standard and daylight saving together, so you never get out of sync inside this time region.
- Which city represents this time zone?
- Adelaide is the representative city for this time region. Its clocks follow the same half‑hour dance with daylight saving.
- Where else uses this unusual offset?
- Only a few regions on Earth use a half‑hour offset, and Australian Central Time is one of them — think India and Iran do the same trick.
- What’s tricky about scheduling here?
- You must remember both daylight saving and the 30‑minute oddity. A meeting at noon here is never a simple round hour elsewhere.
- Do both listed zones change at the same time?
- Adelaide and Broken Hill move clocks together, so you don’t get split offsets inside this time region.
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