Most of Australia uses three standard time zones, Australian Eastern Standard Time (AEST) which is UTC/GMT+10, Australian Central Standard Time (ACST) which is UTC/GMT + 9 1/2 and Australian Western Time (AWST) which is UTC/GMT +8.

Although most of New South Wales observes Australian Eastern Standard Time (AEST), which is UTC/GMT+10, the two communities of Broken Hill and Lord Howe Island are exceptions. Broken Hill observes Australian Central Standard Time (ACST) which is UTC/GMT + 9 1/2 and Lord Howe Island observes UTC/GMT + 10 1/2.

A total of nine distinct time zones are used by Australia and their external territories.



(UTC/GMT +5) Mawson Station Time Zone and Heard and McDonald Islands Time Zone. (UTC/GMT + 6:30) Cocos Islands Time Zone. (UTC/GMT +7) Davis Time Zone and Christmas Island Time Zone. (UTC/GMT +8 ) Australian Western Time Zone, Casey Time Zone. (UTC/GMT +8:45) Central Western Time Zone. (UTC/GMT +9:30) Australian Central Time Zone. (UTC/GMT +10:00) Australian Eastern Time Zone. (UTC/GMT +10:30) Lord Howe Time Zone. (UTC/GMT +11:00) Norfolk Time Zone.

The Australian Capital Territory, New South Wales, South Australia, Tasmania and Victoria all start and end daylight saving time on the same dates. During periods of Daylight Saving Time clocks are advanced by one hour. As an example Australian Eastern Standard Time (AEST) which is UTC/GMT+10 is set ahead to UTC/GMT+11 and is then referred to as Australian Eastern Daylight Time (AEDT).

The names in each time zone change along with Daylight Saving Time. Australian Eastern Standard Time (AEST) becomes Australian Eastern Daylight Time (AEDT), and so forth. View Australia Daylight Saving Time for more details and a schedule of start and end dates.