ACST is equal to Coordinated Universal Time plus 9 ½ hours (UTC +9 ½). AWST is equal to Coordinated Universal Time plus 8 hours (UTC +8).
Daylight Saving Time is the practice of advancing clocks one hour during the summer months of the year.
South Australia time becomes UTC+, called Central Summer Time (CST) or Central Daylight Time (CDT), possibly with "Australia" prefixed (ACST or ACDT).
The time in the southeastern states become UTC+11, using "Eastern" in the time zone name rather than "Central", with the abbreviations being EST, EDT, AEST, or AEDT.
Daylight Saving Time begins at 2am (AEST) on the first Sunday in October and ends at 2am (AEST) (which is 3am Australian Eastern Daylight Time) on the first Sunday in April.
When Daylight Saving Time is observed: AEST becomes Australian Eastern Daylight Time (AEDT), and clocks are advanced to UTC +11.
Australian continent stretches out over three time zones.
Because Australia is situated west to the International Date Line, it is ahead of time compared to most other countries of the world.
The proper names of Australia's time zones are: Australian Western Standard Time - UTC+08 (AWST), Australian Central Standard Time - UTC+ (ACST), and Australian Eastern Standard Time - UTC+ (AEST).
Covers the eastern states of Queensland, New South Wales (with the exception of the town of Broken Hill), Victoria, Tasmania and the Australian Capital Territory.
ACST becomes Australian Central Daylight Time (ACDT), and clocks are advanced to UTC +10 ½.