KST to ACDT Converter
Quick answers
Selected conversion
The selected date and time will appear here when the converter loads.
KST and ACDT examples
These examples always use KST (UTC+9) and ACDT (UTC+10:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
KST is 1 hour and 30 minutes behind ACDT.
How the time difference changes
Depending on seasonal clock changes, KST is 30 minutes behind ACST or KST is 1 hour and 30 minutes behind ACDT.
Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in KST correspond to 9:30 am to 5:30 pm in ACST or working hours of 9:00 am to 5:00 pm in KST correspond to 10:30 am to 6:30 pm in ACDT.
Compare KST time with ACDT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Korea Standard Time is 1 hour and 30 minutes behind Australian Central Daylight Time
9:00 pm21:00 in KST is 10:30 pm22:30 in ACDT
KST to ACDT call time
Best time for a conference call or a meeting is between 9am-3:30pm in KST which corresponds to 10:30am-5pm in ACDT
9:00 pm21:00 Korea Standard Time (KST). Offset UTC +9:00 hours
10:30 pm22:30 Australian Central Daylight Time (ACDT). Offset UTC +10:30 hours
9:00 pm21:00 KST / 10:30 pm22:30 ACDT
| KST | ACDT |
|---|---|
| 12am (midnight) | 1:30 am |
| 1am | 2:30 am |
| 2am | 3:30 am |
| 3am | 4:30 am |
| 4am | 5:30 am |
| 5am | 6:30 am |
| 6am | 7:30 am |
| 7am | 8:30 am |
| 8am | 9:30 am |
| 9am | 10:30 am |
| 10am | 11:30 am |
| 11am | 12:30 pm |
| 12pm (noon) | 1:30 pm |
| 1pm | 2:30 pm |
| 2pm | 3:30 pm |
| 3pm | 4:30 pm |
| 4pm | 5:30 pm |
| 5pm | 6:30 pm |
| 6pm | 7:30 pm |
| 7pm | 8:30 pm |
| 8pm | 9:30 pm |
| 9pm | 10:30 pm |
| 10pm | 11:30 pm |
| 11pm | 12:30 am |
| 00:00 | 01:30 |
| 01:00 | 02:30 |
| 02:00 | 03:30 |
| 03:00 | 04:30 |
| 04:00 | 05:30 |
| 05:00 | 06:30 |
| 06:00 | 07:30 |
| 07:00 | 08:30 |
| 08:00 | 09:30 |
| 09:00 | 10:30 |
| 10:00 | 11:30 |
| 11:00 | 12:30 |
| 12:00 | 13:30 |
| 13:00 | 14:30 |
| 14:00 | 15:30 |
| 15:00 | 16:30 |
| 16:00 | 17:30 |
| 17:00 | 18:30 |
| 18:00 | 19:30 |
| 19:00 | 20:30 |
| 20:00 | 21:30 |
| 21:00 | 22:30 |
| 22:00 | 23:30 |
| 23:00 | 00:30 |
Korea Standard Time
Offset: KST is 9 hours ahead Greenwich Mean Time (GMT) and is used in Asia
Countries using this time zone: Korea (North), Korea (South)
Principal Cities: The largest city in the KST time zone is Seoul in South Korea, with about 10.349 million people. Other major cities in this time zone include Busan, Pyongyang, Incheon, Daegu.
Daylight Saving: Clocks in Korea Standard Time (KST) do not change for daylight saving time, so KST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.
KST 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 KST
- I - short form of 'India'
- Asia/Pyongyang
- Asia/Seoul
- ROK
- Korea Standard Time - UTC +9
- Pyongyang Time - UTC +8:30
- 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
Australian Central Daylight Time
Offset: ACDT is 10 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Australia
Countries using this time zone: Australia
Principal Cities: The largest city in the ACDT time zone is Adelaide in Australia, with about 1.469 million people. Other major cities in this time zone include Adelaide Hills, Mount Gambier, Morphett Vale, Broken Hill.
Daylight Saving: Australian Central Daylight Time (ACDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Australian Central Standard Time (ACST).
Start: Australian Central Daylight Time (ACDT) started on Sunday, October 5, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, October 5, 2025, 3:00 am. Daylight saving starts annually on the first Sunday of October
End: Australian Central Daylight Time (ACDT) ends on Sunday, April 5, 2026 at 3:00 am local time and clocks are set one hour back to Sunday, April 5, 2026, 2:00 am local standard time instead. Daylight saving ends annually on the first Sunday of April
ACDT representations, usage and related time zones
- +1030 - basic
- +10:30 - extended
- +1030 - sign character (+) followed by a four digit time providing hours (10) and minutes (30) of the offset. Indicates an offset of ten hours and thirty minutes to the east of the zero meridian.
- Australia/Adelaide
- Australia/Broken_Hill
- Australia/South
- Australia/Yancowinna
- ACDT - Australian Central Daylight Time
- LHST - Lord Howe Standard Time