ACST to AWDT Converter
ACST is not used on this date
This converter keeps ACST at UTC+9:30. Adelaide uses ACDT (UTC+10:30) on this date. Open the ACDT converter, or choose Adelaide, Adelaide Hills, or Mount Gambier for city-specific time.AWDT is not used on this date.
This converter uses AWST (UTC+8), as in Perth.
Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
9:30 pm21:30 ACST (UTC+9:30), Oct 23, 2026 = 8:00 pm20:00 AWST (UTC+8), Oct 23, 2026
ACST is 1 hour and 30 minutes ahead of AWST.
ACST and AWDT examples
These examples always use ACST (UTC+9:30) and AWDT (UTC+9). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
ACST is 30 minutes ahead of AWDT.
How the time difference changes
ACST is 1 hour and 30 minutes ahead of AWST year-round.
Working hours of 9:00 am to 6:00 pm in ACST correspond to 7:30 am to 4:30 pm in AWST.Working hours of 09:00 to 18:00 in ACST correspond to 07:30 to 16:30 in AWST.
Compare ACST time with AWDT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Australian Central Standard Time is 1 hour and 30 minutes ahead of Australian Western Standard Time.
9:30 pm21:30 in ACST is 8:00 pm20:00 in AWST
ACST to AWST call time
Best time for a conference call or a meeting is between 10:30am-6pm10:30-18:00 in ACST which corresponds to 9am-4:30pm09:00-16:30 in AWST
9:30 pm21:30 Australian Central Standard Time (ACST). Offset UTC +9:30 hours
8:00 pm20:00 Australian Western Standard Time (AWST). Offset UTC +8:00 hours
9:30 pm21:30 ACST / 8:00 pm20:00 AWST
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| ACST | AWST |
|---|---|
| 10:30pm previous day | |
| 11:30pm previous day | |
| 12:30am | |
| 1:30am | |
| 2:30am | |
| 3:30am | |
| 4:30am | |
| 5:30am | |
| 6:30am | |
| 7:30am | |
| 8:30am | |
| 9:30am | |
| 10:30am | |
| 11:30am | |
| 12:30pm | |
| 1:30pm | |
| 2:30pm | |
| 3:30pm | |
| 4:30pm | |
| 5:30pm | |
| 6:30pm | |
| 7:30pm | |
| 8:30pm | |
| 9:30pm | |
| 22:30 previous day | |
| 23:30 previous day | |
| 00:30 | |
| 01:30 | |
| 02:30 | |
| 03:30 | |
| 04:30 | |
| 05:30 | |
| 06:30 | |
| 07:30 | |
| 08:30 | |
| 09:30 | |
| 10:30 | |
| 11:30 | |
| 12:30 | |
| 13:30 | |
| 14:30 | |
| 15:30 | |
| 16:30 | |
| 17:30 | |
| 18:30 | |
| 19:30 | |
| 20:30 | |
| 21:30 |
Australian Central Standard Time
Offset: ACST is 9 hours and 30 minutes ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Australia
Principal Cities: The largest city in the ACST time zone is Adelaide in Australia, with about 1.469 million people. Other major cities in this time zone include Darwin, Palmerston, Alice Springs, Mount Gambier.
Today the lighter areas are on UTC+10:30 (ACDT).
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Australian Central Daylight Time (ACDT).
End: Australian Central Standard Time (ACST) ended on Sunday, October 4, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, October 4, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the first Sunday of October.
Start: Australian Central Standard Time (ACST) starts on Sunday, April 4, 2027 at 3:00 am03:00 local time and clocks are set one hour back to Sunday, April 4, 2027, 2:00 am02:00. Standard time starts annually on the first Sunday of April.
See Australia daylight saving time and upcoming clock changes worldwide.
ACST representations, usage and related time zones
- +0930 - basic
- +09:30 - extended
- +0930 - sign character (+) followed by a four digit time providing hours (09) and minutes (30) of the offset. Indicates an offset of nine hours and thirty minutes to the east of the zero meridian.
- Australia/Adelaide
- Australia/Broken_Hill
- Australia/Darwin
- Australia/North
- Australia/South
- Australia/Yancowinna
Australian Western Daylight Time
Offset: AWDT is 9 hours ahead of Greenwich Mean Time (GMT).
AWDT representations, usage and related time zones
- +09 - basic short
- +0900 - basic
- +09:00 - extended
- +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the east of the zero meridian.
- India - Military abbreviation for AWDT
- I - short form of 'India'
- AWDT - Australian Western Daylight Time
- CHOST - Choibalsan Summer Time
- I - India Time Zone
- IRKST - Irkutsk Summer Time
- JST - Japan Standard Time
- KST - Korea Standard Time
- PWT - Palau Time
- TLT - East Timor Time
- ULAST - Ulaanbaatar Summer Time
- WIT - Eastern Indonesian Time
- YAKT - Yakutsk Time