UTC time

Australian Central Standard Time (ACST) is the time zone used by parts of Australia, which is UTC+9:30. ACST is observed by South Australia, the Northern Territory, and some other regions during standard time (non-daylight saving).

Some regions in the ACST time zone, like South Australia, do observe Daylight Saving Time. During this period, clocks are moved forward one hour, and the time zone changes to Australian Central Daylight Time (ACDT), which is UTC+10:30. However, the Northern Territory does not observe Daylight Saving Time and remains on ACST (UTC+9:30) year-round.

ACST is used in the Northern Territory and South Australia, as well as some areas of western New South Wales and far western Queensland. It is also observed by the town of Broken Hill in New South Wales.

ACST (UTC+9:30) is 30 minutes behind Australian Eastern Standard Time (AEST, UTC+10:00) and 1 hour and 30 minutes ahead of Australian Western Standard Time (AWST, UTC+8:00).

New York (EST/EDT): ACST is 14 hours and 30 minutes ahead of Eastern Standard Time (EST, UTC-5:00) and 13 hours and 30 minutes ahead of Eastern Daylight Time (EDT, UTC-4:00).

London (GMT/BST): ACST is 9 hours and 30 minutes ahead of Greenwich Mean Time (GMT, UTC+0) and 8 hours and 30 minutes ahead during British Summer Time (BST, UTC+1:00).

Tokyo (JST): ACST is 30 minutes behind Japan Standard Time (JST, UTC+9:00).

Sydney (AEST/AEDT): ACST is 30 minutes behind Australian Eastern Standard Time (AEST, UTC+10:00) and 1 hour and 30 minutes behind Australian Eastern Daylight Time (AEDT, UTC+11:00).

the Northern Territory in Australia uses ACST (UTC+9:30) year-round, as it does not observe Daylight Saving Time. Other regions, like South Australia, switch to Australian Central Daylight Time (ACDT) during daylight saving.

While ACST is specific to Australia, some territories in Southeast Asia, like parts of Indonesia (e.g., East Timor), use similar time zones (UTC+9:00 or UTC+10:00). However, there are no other countries that share the exact time zone of UTC+9:30.