Each state in Australia sets its own standard trading hours, but in most of the states the shops are open seven days a week for at least part of the day. For some shops and other businesses Christmas Day is the only day in the year that they are closed.

Sunday shopping
The situation in Australia is not uniform, as each of its States and Territories has its own different laws. Historically, shops closed for the weekend on Saturday afternoons, with South Australia being the first state to allow Saturday afternoon opening. Most states now allow Sunday opening for up to seven hours, at least in metropolitan areas.

Certain shops are generally made exempt, or partially exempt, from trading hours laws (including restrictions on Sunday trading) under certain conditions. Shops that are not exempt from trading hours restrictions are referred to as "general" or "non-exempt" shops. Although these vary from state to state, generally speaking, exemptions can be based on one or more of the following:

a maximum number of employees employed by the shop, or staffed at any one time (for example, New South Wales exempts shops with no more than four staff at any one time),

by the floor size of the shop (for example, South Australia exempts shops with a floor space of less than 200m2),

by the type of goods the shop sells - for example, hardware and furniture shops are often partially exempted, while shops such as newsagents, flowers, certain food shops (other than supermarkets) and chemists are often fully exempt, or

by its location, often in significant tourist areas - either by inclusion, or by exclusion - i.e. declaring that trading hours outside of designated areas are deregulated.

Sunday shopping - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Sunday_shopping#Australia