Offset
The time difference between Australian Central Time and Coordinated Universal Time is 9.5 hours.
Australian Central Time (ACST) is ahead of Coordinated Universal Time (UTC).
ACST: UTC+9:30
UTC: UTC
Neither Australian Central Time nor Coordinated Universal Time is currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Australian Central Time and Coordinated Universal Time don't overlap on the same weekday. Coordinated Universal Time is 9 hours behind Australian Central Time.
With some flexibility, there’s a workable window outside standard hours:
- 5 PM–8 PM in Australian Central Time (7 AM–10 AM in Coordinated Universal Time) — suggest 6:00 PM Australian Central Time (8:30 AM Coordinated Universal Time).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Australia
- New Year's DayThu, Jan 1
- Australia DayMon, Jan 26
- Good FridayFri, Apr 3
- Easter MondayMon, Apr 6
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
About these zones
Australian Central Time is also known as ACST, or ACDT. To call Australia, dial +61.
Coordinated Universal Time is also known as UTC.
Coordinated Universal Time is approximately 8,850 miles southwest of Australian Central Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| ACST | UTC | Day |
|---|---|---|
| 12:00 am | 2:30 pm | -1 day |
| 1:00 am | 3:30 pm | -1 day |
| 2:00 am | 4:30 pm | -1 day |
| 3:00 am | 5:30 pm | -1 day |
| 4:00 am | 6:30 pm | -1 day |
| 5:00 am | 7:30 pm | -1 day |
| 6:00 am | 8:30 pm | -1 day |
| 7:00 am | 9:30 pm | -1 day |
| 8:00 am | 10:30 pm | -1 day |
| 9:00 am | 11:30 pm | -1 day |
| 10:00 am | 12:30 am | Same day |
| 11:00 am | 1:30 am | Same day |
| 12:00 pm | 2:30 am | Same day |
| 1:00 pm | 3:30 am | Same day |
| 2:00 pm | 4:30 am | Same day |
| 3:00 pm | 5:30 am | Same day |
| 4:00 pm | 6:30 am | Same day |
| 5:00 pm | 7:30 am | Same day |
| 6:00 pm | 8:30 am | Same day |
| 7:00 pm | 9:30 am | Same day |
| 8:00 pm | 10:30 am | Same day |
| 9:00 pm | 11:30 am | Same day |
| 10:00 pm | 12:30 pm | Same day |
| 11:00 pm | 1:30 pm | Same day |
Daylight saving time
Australian Central Time observes daylight saving time; Coordinated Universal Time does not. The offset between the two zones changes when Australian Central Time transitions: on Sunday, October 4, 2026, clocks spring forward from ACST to ACDT.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 7:18 AM
- Sunset
- 5:12 PM
- Day length
- 9h 55m
- Sunrise
- 5:56 AM
- Sunset
- 6:03 PM
- Day length
- 12h 7m
Daylight overlap: 1h 47m — 3:26 PM–5:12 PM in Australian Central Time (5:56 AM–7:42 AM in Coordinated Universal Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Australian Central Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Australian Central Time
- ADL
Related conversions
Common conversions
- What is 9:00 am ACST in UTC?
- 9:00 am ACST is 11:30 pm UTC, the previous day.
- What is 12:00 pm ACST in UTC?
- 12:00 pm ACST is 2:30 am UTC.
- What is 12:30 pm ACST in UTC?
- 12:30 pm ACST is 3:00 am UTC.
- What is 2:00 pm ACST in UTC?
- 2:00 pm ACST is 4:30 am UTC.
- What is 5:00 pm ACST in UTC?
- 5:00 pm ACST is 7:30 am UTC.
- What is 11:30 pm ACST in UTC?
- 11:30 pm ACST is 2:00 pm UTC.