ACST to PDT 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.PDT is not used on this date
This converter uses PST (GMT -8), the offset Los Angeles uses on this date. Open the PST converter.Quick answers
Selected conversion
The selected date and time will appear here when the converter loads.
ACST and PDT examples
These examples always use ACST (UTC+9:30) and PDT (UTC-7). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
ACST is 16 hours and 30 minutes ahead of PDT.
How the time difference changes
For most of the year, ACST is 16 hours and 30 minutes ahead of PDT. At other times of the year, ACST is 17 hours and 30 minutes ahead of PST.
For most of the year, working hours of 9:00 am to 5:00 pm in ACST correspond to 4:30 pm (previous day) to 12:30 am in PDT. At other times of the year, working hours of 9:00 am to 5:00 pm in ACST correspond to 3:30 pm (previous day) to 11:30 pm (previous day) in PST.
Compare ACST time with PDT 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 17 hours and 30 minutes ahead of Pacific Standard Time
9:30 pm21:30 in ACST is 4:00 am04:00 in PST
ACST to PST call time
Best time for a conference call or a meeting is between 9am-10:30am in ACST which corresponds to 3:30pm-5pm in PST (previous day)
9:30 pm21:30 Australian Central Standard Time (ACST). Offset UTC +9:30 hours
4:00 am04:00 Pacific Standard Time (PST). Offset UTC -8:00 hours
9:30 pm21:30 ACST / 4:00 am04:00 PST
| ACST | PST |
|---|---|
| 12am (midnight) | 6:30 am |
| 1am | 7:30 am |
| 2am | 8:30 am |
| 3am | 9:30 am |
| 4am | 10:30 am |
| 5am | 11:30 am |
| 6am | 12:30 pm |
| 7am | 1:30 pm |
| 8am | 2:30 pm |
| 9am | 3:30 pm |
| 10am | 4:30 pm |
| 11am | 5:30 pm |
| 12pm (noon) | 6:30 pm |
| 1pm | 7:30 pm |
| 2pm | 8:30 pm |
| 3pm | 9:30 pm |
| 4pm | 10:30 pm |
| 5pm | 11:30 pm |
| 6pm | 12:30 am |
| 7pm | 1:30 am |
| 8pm | 2:30 am |
| 9pm | 3:30 am |
| 10pm | 4:30 am |
| 11pm | 5:30 am |
| 00:00 | 06:30 |
| 01:00 | 07:30 |
| 02:00 | 08:30 |
| 03:00 | 09:30 |
| 04:00 | 10:30 |
| 05:00 | 11:30 |
| 06:00 | 12:30 |
| 07:00 | 13:30 |
| 08:00 | 14:30 |
| 09:00 | 15:30 |
| 10:00 | 16:30 |
| 11:00 | 17:30 |
| 12:00 | 18:30 |
| 13:00 | 19:30 |
| 14:00 | 20:30 |
| 15:00 | 21:30 |
| 16:00 | 22:30 |
| 17:00 | 23:30 |
| 18:00 | 00:30 |
| 19:00 | 01:30 |
| 20:00 | 02:30 |
| 21:00 | 03:30 |
| 22:00 | 04:30 |
| 23:00 | 05:30 |
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
Pacific Daylight Time
Offset: PDT is 7 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries using this time zone: Canada, Mexico, United States
Principal Cities: The largest city in the PDT time zone is Los Angeles in the United States, with about 3.821 million people. Other major cities in this time zone include Tijuana, San Diego, Mexicali, San Jose.
French: HAP - Heure Avancée du Pacifique
Spanish: PT - Zona Noroeste
Daylight Saving: Pacific Daylight Time (PDT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe Pacific Standard Time (PST).
End: Pacific Daylight Time (PDT) ended on Sunday, November 2, 2025 at 2:00 am local time and clocks were set one hour back to Sunday, November 2, 2025, 1:00 am local standard time instead. Daylight saving ends annually on the first Sunday of November
Start: Pacific Daylight Time (PDT) starts on Sunday, March 8, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, March 8, 2026, 3:00 am. Daylight saving starts annually on the second Sunday of March
PDT representations, usage and related time zones
- -07 - basic short
- -0700 - basic
- -07:00 - extended
- -0700 - sign character (-) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates an offset of seven hours to the west of the zero meridian.
- Tango - Military abbreviation for PDT
- T - short form of 'Tango'
- America/Ensenada
- America/Los_Angeles
- America/Santa_Isabel
- America/Tijuana
- America/Vancouver
- Canada/Pacific
- Mexico/BajaNorte
- PST8PDT
- US/Pacific
- MST - Mountain Standard Time
- PDT - Pacific Daylight Time
- YST - Yukon Standard Time
- T - Tango Time Zone