ACST is the abbreviation for Australian Central Standard Time, a time zone offset of UTC+9:30. It applies in
Central Australia (winter).
Time-zone abbreviations are convenient but not unique or official — several codes are shared by
more than one zone. When precision matters, use the underlying IANA zone name (for example
Australia/Adelaide) or the UTC offset UTC+9:30 instead.
Frequently asked questions
What does ACST stand for?
ACST stands for Australian Central Standard Time. It is UTC+9:30, used in Central Australia (winter).
What is the UTC offset of ACST?
ACST (Australian Central Standard Time) is UTC+9:30, meaning it is 9.5 hours ahead of Coordinated Universal Time.
Does ACST change for daylight saving time?
Regions on ACST generally keep this offset year-round rather than switching for daylight saving.