21 December 2029 falls in the final month of 2029, the 365-day year that closes on 31 December. The following year opens with New Year's Day and its own run of public holidays already fixed on the calendar for the twelve months ahead.
Some employers close early or run a shortened day on Friday, ahead of the weekend that follows. 21 December 2029 falls on this day, the last of the five working days counted in the total shown above for its week, immediately before Saturday and Sunday begin the two-day break most standard working arrangements observe.
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 2029 can show a different total depending on which state's calendar applies to 21 December. Interstate businesses need to check more than one state's list before setting a national deadline.