ACST to AEST Converter
Adelaide to Queensland — 0.5-hour gap (ACST UTC+9:30, AEST UTC+10). Unique domestic Australian half-hour difference.
Time Zone Converter
Compare Times
| ACST | AEST |
|---|---|
| 8:00 AM ACST | 8:30 AM AEST |
| 9:00 AM ACST | 9:30 AM AEST |
| 10:00 AM ACST | 10:30 AM AEST |
| 11:00 AM ACST | 11:30 AM AEST |
| 12:00 PM ACST | 12:30 PM AEST |
| 1:00 PM ACST | 1:30 PM AEST |
| 2:00 PM ACST | 2:30 PM AEST |
| 3:00 PM ACST | 3:30 PM AEST |
| 4:00 PM ACST | 4:30 PM AEST |
| 5:00 PM ACST | 5:30 PM AEST |
| 6:00 PM ACST | 6:30 PM AEST |
| 7:00 PM ACST | 7:30 PM AEST |
| 8:00 PM ACST | 8:30 PM AEST |
Common Time Conversions
EST · New York →
CST · Chicago →
MST · Denver →
PST · Los Angeles →
AKST · Anchorage →
HST · Honolulu →
UTC · Universal →
GMT · London →
IST · New Delhi →
CET · Paris →
How Time Zone Conversion Works
Time zone conversion works by comparing the UTC offset of one location to another. Every city or region is measured relative to Coordinated Universal Time (UTC), which acts as the global reference point for civil time.
AEST is 0 hours 30 minutes ahead of ACST (standard time).
Daylight Saving Time: ACST observes DST; AEST does not. The offset between them shifts by 1 hour twice a year — in spring and autumn — when ACST changes its clocks.
Best Meeting Times: ACST & AEST
ACST
09:00–16:30
Central Australia Time
AEST
09:30–17:00
Eastern Australia Time
Recommended time: 12:30 ACST / 13:00 AEST
DST schedule for 2026
Current-year daylight saving start and end dates for the selected zones.
ACST · Central Australia Time
Standard offset +09:30
- Starts
- Oct 4, 2026 · 02:00 → 03:00
- first_sunday_of_october
- Ends
- Apr 5, 2026 · 03:00 → 02:00
- first_sunday_of_april
- Daylight time
- ACDT · +10:30
South Australia observes DST (ACDT, UTC+10:30); the Northern Territory remains on ACST year-round. SA has used the same Sunday transition dates as the eastern states since the 2008/09 DST season — older sources stating SA changes one week later are out of date.
AEST · Eastern Australia Time
Standard offset +10:00
Eastern Australia Time remains on a constant standard offset for the year.
This record represents the year-round UTC+10 designation used in Queensland, which does not observe DST. NSW, Victoria, Tasmania, and ACT use AEST as the winter half of a cycle that transitions to AEDT (UTC+11) in summer — see the AEDT record for those DST dates and rules.
Principal Cities
ACST — Central Australia Time
- AdelaideAustralia
- DarwinAustralia
- Alice SpringsAustralia
- PalmerstonAustralia
AEST — Eastern Australia Time
- SydneyAustralia
- MelbourneAustralia
- BrisbaneAustralia
- Gold CoastAustralia