Father's Day is observed on the first Sunday of September every year, shaping retail trade for the week either side of it. 29 September 2028 falls inside the same 30-day month as this observance, in the first month of the Australian spring, as warmer weather returns across the southern half of the country.
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 29 September 2028 falls on this day of the week, the last working day of its standard Monday-to-Friday week before the weekend begins.
Contracts and legal deadlines that specify calendar days count every day from 29 September 2028 including weekends and public holidays, while deadlines specified in working or business days count only the days this page includes in its working-day total. The difference between the two conventions can shift a deadline by several days once weekends and holidays are counted.