@yassie_j most of the year we have 3 timezones (AWST UTC+8, ACST UTC+9:30, AEST UTC+10)
in summer we have 5 timezones (AWST UTC+8 - Perth, ACST UTC+9:30 - Darwin, AEST UTC+10 - Brisbane, ACDT UTC+10:30 - Adelaide, AEDT UTC+11 - Sydney, Canberra, Melbourne, Hobart)
then there's ACWST UTC+8:45 but that's not really recognized