Offset
The time difference between Coordinated Universal Time and Australian Central Time is 9.5 hours.
Coordinated Universal Time (UTC) is behind Australian Central Time (ACST).
UTC: UTC
ACST: UTC+9:30
Neither Coordinated Universal Time nor Australian Central Time is currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Coordinated Universal Time and Australian Central Time don't overlap on the same weekday. Australian Central Time is 10 hours ahead of Coordinated Universal Time.
With some flexibility, there’s a workable window outside standard hours:
- 7 AM–11 AM in Coordinated Universal Time (4 PM–8 PM in Australian Central Time) — suggest 9:00 AM Coordinated Universal Time (6:30 PM Australian Central 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
Coordinated Universal Time is also known as UTC.
Australian Central Time is also known as ACST, or ACDT. To call Australia, dial +61.
Australian Central Time is approximately 8,850 miles southeast of Coordinated Universal Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| UTC | ACST | Day |
|---|---|---|
| 12:00 am | 9:30 am | Same day |
| 1:00 am | 10:30 am | Same day |
| 2:00 am | 11:30 am | Same day |
| 3:00 am | 12:30 pm | Same day |
| 4:00 am | 1:30 pm | Same day |
| 5:00 am | 2:30 pm | Same day |
| 6:00 am | 3:30 pm | Same day |
| 7:00 am | 4:30 pm | Same day |
| 8:00 am | 5:30 pm | Same day |
| 9:00 am | 6:30 pm | Same day |
| 10:00 am | 7:30 pm | Same day |
| 11:00 am | 8:30 pm | Same day |
| 12:00 pm | 9:30 pm | Same day |
| 1:00 pm | 10:30 pm | Same day |
| 2:00 pm | 11:30 pm | Same day |
| 3:00 pm | 12:30 am | +1 day |
| 4:00 pm | 1:30 am | +1 day |
| 5:00 pm | 2:30 am | +1 day |
| 6:00 pm | 3:30 am | +1 day |
| 7:00 pm | 4:30 am | +1 day |
| 8:00 pm | 5:30 am | +1 day |
| 9:00 pm | 6:30 am | +1 day |
| 10:00 pm | 7:30 am | +1 day |
| 11:00 pm | 8:30 am | +1 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
- 5:56 AM
- Sunset
- 6:03 PM
- Day length
- 12h 7m
- Sunrise
- 7:18 AM
- Sunset
- 5:12 PM
- Day length
- 9h 55m
Daylight overlap: 1h 47m — 5:56 AM–7:42 AM in Coordinated Universal Time (3:26 PM–5:12 PM in Australian Central 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 UTC in ACST?
- 9:00 am UTC is 6:30 pm ACST.
- What is 12:00 pm UTC in ACST?
- 12:00 pm UTC is 9:30 pm ACST.
- What is 12:30 pm UTC in ACST?
- 12:30 pm UTC is 10:00 pm ACST.
- What is 2:00 pm UTC in ACST?
- 2:00 pm UTC is 11:30 pm ACST.
- What is 5:00 pm UTC in ACST?
- 5:00 pm UTC is 2:30 am ACST, the next day.
- What is 11:30 pm UTC in ACST?
- 11:30 pm UTC is 9:00 am ACST, the next day.