29 December 2027 falls in the final month of 2027, 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.
The Ekka public holiday in greater Brisbane is held on a Wednesday during the Royal Queensland Show each August, one of the few recurring public holidays fixed to this day of the week. Wednesday 29 December 2027 falls on the same weekday as this regional observance, which applies only within greater Brisbane and not to the rest of Queensland.
2027 has 365 days on the calendar. Leap years add a single extra day to February, giving those years 366 days instead of 365 and shifting the day-of-year number for every date from March onward by one compared with an ordinary year. This is the only irregularity in the length of the Australian calendar year.