Australian states set their own standard trading hours, but in most states the shops are open seven days a week for at least part of the day.

New South Wales, Victoria and Tasmania -  closed on Christmas Day and Good Friday, ANZAC Day (until 1pm)

Tasmania and NSW  -  closed on Easter Sunday,

NSW  -  closed on  Boxing Day (outside the Sydney special trading precinct)

Northern Territory and the Australian Capital Territory  -  can remain open on any public holiday

Victoria  -  Almost all shopping centers in Melbourne now trade until 9pm on Thursdays and Fridays as well as being open longer hours on Sundays.  Some of the larger shopping centers will open from 8 am December 23 until 6 pm on Christmas Eve. Centers often open to 10pm or midnight on most other nights in the fortnight before Christmas, and the first few days of the annual Boxing Day Sales.

South Australia  -  Larger supermarkets close at 9 pm on Mondays to Fridays, and 5 pm on Saturdays; Sundays and public holidays from 11am to 5pm, except ANZAC Day, which is 12 noon to 5pm. Closed on Good Friday, Easter Sunday and Christmas Day.

Queensland  -  Trading hours of major supermarkets are Monday to Saturday from 7am to 9pm and Sundays and public holidays from 9am to 6pm.  Most major shopping centers close at 5pm every day, except for "late night shopping" on one night a week. 

Western Australia  -  Chain supermarkets are required to close Monday to Friday at 9pm, Saturdays at 5pm, and are permitted to trade on Sundays and public holidays only from 10am to 5pm.