Home > Time Zones > Abbreviations > ACST – Australian Central Standard Time

ACST – Australian Central Standard Time (Standard Time)

Also known as: CST – Central Standard Time

Australian Central Standard Time Note:

Australia: Only some locations are currently on ACST because most places in this time zone are currently on summer time / daylight saving time and are observing ACDT.

Time zone map of ACST
Currently observing ACST.
Observes ACST part of the year.
Areas with same time currently (UTC +9:30).
Currently observing ACST – Australian Central Standard Time.
Observes ACST – Australian Central Standard Time part of the year, but not currently.
Currently has same time zone offset as ACST (UTC +9:30) but different time zone name.

Australian Central Standard Time (ACST) is 9:30 hours ahead of Coordinated Universal Time (UTC). This time zone is a standard time zone and is used in: Australia. Australian Central Standard Time is a half-hour time zone. Its local time differs by 30 minutes from the usual one-hour time zone interval.

See full time zone map

Summer Time & DST

Some places observe daylight saving time/summer time during the summer, and therefore use ACDT (Australian Central Daylight Time) in the summer.

Email time zone indicator: +0930

An email sent from someone in the Australian Central Standard Time (ACST) time zone will have the time zone listed as "+0930" in the headers of the email. (However, "+0930" does not have to be in Australian Central Standard Time, as other time zones could have the same UTC offset).

Where and when is ACST observed?


Australian states/territories using ACST in the winter and ACDT in the summer

  • New South Wales - only in Yancowinna County
  • South Australia

Australian states/territories using ACST all year

  • Northern Territory

ACST time now


Sunday, November 29, 2015

  • ACST will be observed in Adelaide starting from Apr 3, 2016 at 3:00 AM
  • UTC Offset: UTC +9:30
  • 14:30 hours ahead of Washington DC

Find current time and time zone by city


Example cities

Australia – Darwin (All Year)
Australia – Adelaide (Winter)

Related time zones

ACDT – Australian Central Daylight Time (Daylight Time)

Time Zone Map with DST

Time zone map

Time Zone Map