ACST
Australian Central Standard Time
GMT +9:30
ACST is NOT in use by many locations
ACDT (Australian Central Daylight Time) is used instead. Switch to ACDT time zone or select one of the cities Adelaide, Darwin, Adelaide Hills) for automatic timezone change.
Hawaii, USA
HST

Time Difference

Australian Central Standard Time is 19 hours and 30 minutes ahead of HST (Hawaii Standard Time)
6:30 pm18:30 in ACST is 11:00 pm23:00 in Waipahu, HI, USA

ACST to Waipahu call time
Best time for a conference call or a meeting is between 10:30pm-12:30pm in ACST which corresponds to 3am-5am in Waipahu

6:30 pm18:30 Australian Central Standard Time (ACST). Offset UTC +9:30 hours
11:00 pm23:00 HST (Hawaii Standard Time) (Waipahu, HI, USA). Offset UTC -10:00 hours

6:30 pm18:30 ACST / 11:00 pm23:00 Waipahu, HI, USA

ACST Waipahu, HI, USA
12am (midnight) 4:30 am
1am 5:30 am
2am 6:30 am
3am 7:30 am
4am 8:30 am
5am 9:30 am
6am 10:30 am
7am 11:30 am
8am 12:30 pm
9am 1:30 pm
10am 2:30 pm
11am 3:30 pm
12pm (noon) 4:30 pm
1pm 5:30 pm
2pm 6:30 pm
3pm 7:30 pm
4pm 8:30 pm
5pm 9:30 pm
6pm 10:30 pm
7pm 11:30 pm
8pm 12:30 am
9pm 1:30 am
10pm 2:30 am
11pm 3:30 am
0:00 4:30
1:00 5:30
2:00 6:30
3:00 7:30
4:00 8:30
5:00 9:30
6:00 10:30
7:00 11:30
8:00 12:30
9:00 13:30
10:00 14:30
11:00 15:30
12:00 16:30
13:00 17:30
14:00 18:30
15:00 19:30
16:00 20:30
17:00 21:30
18:00 22:30
19:00 23:30
20:00 0:30
21:00 1:30
22:00 2:30
23:00 3:30

Australian Central Standard Time

Offset: ACST is 9 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Australia

Countries: It is used in following countries: Australia

Principal Cities: The largest city in the ACST timezone is Adelaide from Australia with population about 1.225 million people. Other major cities in the area are Darwin, Adelaide Hills, Alice Springs, Palmerston

ACST Time Zone Geo Map
ACST timezone map

Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Australian Central Daylight Time (ACDT).

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Australian Central Standard Time (ACST) has ended on Sunday, October 6, 2024 at 2:00 am local time and clocks were set one hour forward to Sunday, October 6, 2024, 3:00 am local daylight time instead. Standard time ends annually the on first Sunday of October.

Daylight saving time clock moves back for one hour from 3am to 2amStart: Australian Central Standard Time (ACST) starts on Sunday, April 6, 2025 at 3:00 am local time and clocks are set one hour back to Sunday, April 6, 2025, 2:00 am. Standard time starts annually the on first Sunday of April.

ACST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +0930 - basic
  • +09:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0930 - sign character (+) followed by a four digit time providing hours (09) and minutes (30) of the offset. Indicates nine hour and thirty minutes time differences to the east of the zero meridian.
IANA/Olson: Reflects ACST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Australia/Adelaide
  • Australia/Broken_Hill
  • Australia/Darwin
  • Australia/North
  • Australia/South
  • Australia/Yancowinna

Waipahu Information

Time Zone

Abbreviation / Name
HST - Hawaii Standard Time
UTC / GMT Offset
-10:00 hours during Hawaii Standard Time, currently in use.

Waipahu Facts

Country
USA
State
Hawaii
Alternative Names
Vajpakhu, vaipahu, waipafu, waipahu, Вајпаху, ואיפאהו, وائپاہو، ہوائی, वैपाहु, ワイパフ, 와이파후
Population
38,216
Currency
Dollar (USD)
Geographic Coordinates
21° 23' N Latitude / 158° 00' W Longitude
International Dialing Code
+1