Summer begins on 1 December, and December carries the two biggest fixed public holidays of the year: Christmas Day on 25 December and Boxing Day on 26 December. 4 December 2026 falls inside this 31-day month, at the height of the Australian retail and travel calendar for the year.
A public holiday on a Friday pairs directly with the Saturday and Sunday that follow it, producing one of the two most common three-day-weekend patterns on the Australian calendar. Friday 4 December 2026 falls on this day of the week, the last working day of its standard Monday-to-Friday week before the weekend begins.
The working-day count on this page excludes both weekend days and any public holiday declared for the state selected, so the same date in 2026 can show a different total depending on which state's calendar applies to 4 December. Interstate businesses need to check more than one state's list before setting a national deadline.