Australia uses three main time zones: Australian Western Standard Time (AWST; UTC + 08: 00), Australian Central Standard Time (ACST; UTC + 09: 30), and Australian Eastern Standard Time (AEST; UTC + 10: 00). Time is regulated by the individual state governments, some of which observe daylight saving time (DST). Australia 's external territories observe different time zones.
how many different time zones does australia have
three