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. 29 December 2030 falls inside this 31-day month, at the height of the Australian retail and travel calendar for the year.
Retail, hospitality, healthcare and emergency services rosters regularly schedule staff to work on Sundays as part of standard shift patterns that do not follow the Monday-to-Friday week. 29 December 2030 falls on Sunday, a working day for these shift-based industries even though it sits outside the standard working-day count above.
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 2030 can show a different total depending on which state's calendar applies to 29 December. Interstate businesses need to check more than one state's list before setting a national deadline.