YAPT to ACST Converter
ACST is not used on this date
This converter keeps ACST at GMT +9:30. Adelaide uses ACDT (GMT +10:30) on this date. Open the ACDT converter, or choose Adelaide, Adelaide Hills, or Mount Gambier for city-specific time.Quick answers
Selected conversion
The selected date and time will appear here when the converter loads.
YAPT and ACST examples
These examples always use YAPT (UTC+10) and ACST (UTC+9:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
YAPT is 30 minutes ahead of ACST.
How the time difference changes
YAPT is 30 minutes ahead of ACST year-round.
Working hours of 9:00 am to 5:00 pm in YAPT correspond to 8:30 am to 4:30 pm in ACST.
Compare YAPT time with ACST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Yap Time is 0 hours and 30 minutes ahead of Australian Central Standard Time
10:00 pm22:00 in YAPT is 9:30 pm21:30 in ACST
YAPT to ACST call time
Best time for a conference call or a meeting is between 9:30am-5pm in YAPT which corresponds to 9am-4:30pm in ACST
10:00 pm22:00 Yap Time (YAPT). Offset UTC +10:00 hours
9:30 pm21:30 Australian Central Standard Time (ACST). Offset UTC +9:30 hours
10:00 pm22:00 YAPT / 9:30 pm21:30 ACST
| YAPT | ACST |
|---|---|
| 12am (midnight) | 11:30 pm |
| 1am | 12:30 am |
| 2am | 1:30 am |
| 3am | 2:30 am |
| 4am | 3:30 am |
| 5am | 4:30 am |
| 6am | 5:30 am |
| 7am | 6:30 am |
| 8am | 7:30 am |
| 9am | 8:30 am |
| 10am | 9:30 am |
| 11am | 10:30 am |
| 12pm (noon) | 11:30 am |
| 1pm | 12:30 pm |
| 2pm | 1:30 pm |
| 3pm | 2:30 pm |
| 4pm | 3:30 pm |
| 5pm | 4:30 pm |
| 6pm | 5:30 pm |
| 7pm | 6:30 pm |
| 8pm | 7:30 pm |
| 9pm | 8:30 pm |
| 10pm | 9:30 pm |
| 11pm | 10:30 pm |
| 00:00 | 23:30 |
| 01:00 | 00:30 |
| 02:00 | 01:30 |
| 03:00 | 02:30 |
| 04:00 | 03:30 |
| 05:00 | 04:30 |
| 06:00 | 05:30 |
| 07:00 | 06:30 |
| 08:00 | 07:30 |
| 09:00 | 08:30 |
| 10:00 | 09:30 |
| 11:00 | 10:30 |
| 12:00 | 11:30 |
| 13:00 | 12:30 |
| 14:00 | 13:30 |
| 15:00 | 14:30 |
| 16:00 | 15:30 |
| 17:00 | 16:30 |
| 18:00 | 17:30 |
| 19:00 | 18:30 |
| 20:00 | 19:30 |
| 21:00 | 20:30 |
| 22:00 | 21:30 |
| 23:00 | 22:30 |
Yap Time
Offset: YAPT is 10 hours ahead Greenwich Mean Time (GMT) and is used in Pacific
Daylight Saving: Clocks in Yap Time (YAPT) do not change for daylight saving time, so YAPT stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.
YAPT representations, usage and related time zones
- +10 - basic short
- +1000 - basic
- +10:00 - extended
- +1000 - sign character (+) followed by a four digit time providing hours (10) and minutes (00) of the offset. Indicates an offset of ten hours to the east of the zero meridian.
- Kilo - Military abbreviation for YAPT
- K - short form of 'Kilo'
- AEST - Australian Eastern Standard Time
- CHUT - Chuuk Time
- ChST - Chamorro Standard Time
- K - Kilo Time Zone
- KDT - Korea Daylight Time
- PGT - Papua New Guinea Time
- VLAT - Vladivostok Time
- YAKST - Yakutsk Summer Time
- YAPT - Yap Time
Australian Central Standard Time
Offset: ACST is 9 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 ACST time zone is Darwin in Australia, with about 139,902 people. Other major cities in this time zone include Palmerston, Alice Springs.
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 5, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, October 5, 2025, 3:00 am local daylight time instead. Standard time ends annually on the first Sunday of October.
Start: Australian Central Standard Time (ACST) starts 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. Standard time starts annually on the first Sunday of April.
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