ACST — Australian Central Standard Time
UTC+09:30 · 9 hours and 30 minutes ahead of UTC · Standard time
Details
| Abbreviation | ACST |
| Full name | Australian Central Standard Time |
| UTC offset | UTC+09:30 |
| IANA identifier | Australia/Adelaide |
| DST status | Inactive (standard) |
| Standard offset | UTC+09:30 |
| DST offset | UTC+10:30 |
| Clocks forward | Sunday, October 4, 2026 |
| Clocks back | Sunday, April 5, 2026 |
Countries Using ACST
Time Difference from ACST
| City | Difference |
|---|---|
| New York | +13h 30m |
| Chicago | +14h 30m |
| Los Angeles | +16h 30m |
| London | +8h 30m |
| Paris | +7h 30m |
| Moscow | +6h 30m |
| Dubai | +5h 30m |
| Mumbai | +4h |
| Bangkok | +2h 30m |
| Shanghai | +1h 30m |
| Tokyo | +0h 30m |
| Sydney | -0h 30m |
| Auckland | -2h 30m |
Using ACST in practice
Planning notes for business hours, handoffs, and recurring meetings in this timezone.
Right now
It is currently night in ACST, which is outside typical calling hours. Standard business-hour checks should use 9:00 AM-5:00 PM local time.
Best overlap
The best listed workday overlap is with Tokyo: 9:30 AM-5:30 PM ACST equals 9:00 AM-5:00 PM there.
Recurring events
This zone observes daylight saving time, so recurring meetings can shift by one hour for people outside the same DST rule.
| Market | ACST | Their time |
|---|---|---|
| Tokyo | 9:30 AM-5:30 PM | 9:00 AM-5:00 PM |
| Shanghai | 10:30 AM-5:30 PM | 9:00 AM-4:00 PM |
| Sydney | 9:30 AM-4:30 PM | 10:00 AM-5:00 PM |
| Bangkok | 11:30 AM-5:30 PM | 9:00 AM-3:00 PM |
| Auckland | 9:30 AM-2:30 PM | 12:00 PM-5:00 PM |
| Mumbai | 1:30 PM-5:30 PM | 9:30 AM-1:30 PM |
Convert ACST to Other Time Zones
About ACST (Australian Central Standard Time)
ACST (Australian Central Standard Time) is a time zone with a UTC offset of +09:30, meaning it is 9 hours and 30 minutes ahead of UTC. The IANA timezone database identifies it as Australia/Adelaide. It is used in 1 country, including Australia.
This time zone observes daylight saving time. During standard time, the offset is UTC+09:30. When DST is active, clocks are advanced by one hour to UTC+10:30. In 2026, DST begins on Sunday, October 4, 2026 and ends on Sunday, April 5, 2026. DST is currently not active.
Major cities in ACST include Adelaide.
Frequently Asked Questions
What is ACST?
ACST stands for Australian Central Standard Time. It is 9 hours and 30 minutes ahead of UTC (UTC+09:30). The IANA timezone identifier is Australia/Adelaide.
What is the current time in ACST?
The current ACST time is shown at the top of this page and updates every second. ACST is UTC+09:30, which is 9 hours and 30 minutes ahead of UTC.
Does ACST observe daylight saving time?
Yes. When DST is active, the offset changes from UTC+09:30 to UTC+10:30. In 2026, clocks spring forward on Sunday, October 4, 2026 and fall back on Sunday, April 5, 2026.
What countries use ACST?
Countries and regions using ACST include Australia.
How do I convert ACST to my local time?
Use our time zone converter to convert ACST to any other time zone. You can also check the time difference table on this page which shows the offset between ACST and 13 major world cities.