Australia spans 7 time zones, from UTC+09:30 to UTC+10:00. The time zones used are GMT+9:30 (UTC+09:30), GMT+10 (UTC+10:00), GMT+9:30 (UTC+09:30), GMT+10 (UTC+10:00), GMT+10 (UTC+10:00), GMT+8 (UTC+08:00), GMT+10 (UTC+10:00). Daylight saving time is observed in some or all of these zones.

The largest city is Sydney, followed by Melbourne. The capital, Canberra, uses the GMT+9:30 time zone.