The Australian Open runs in Melbourne throughout January, and the Big Bash cricket season plays out across the same weeks. 21 January 2028 sits inside this national sporting calendar, alongside the height of the wet season across the tropical north and the peak of the summer beach season in the southern capital cities, before both the cricket and tennis seasons wind down in February.
Some employers close early or run a shortened day on Friday, ahead of the weekend that follows. 21 January 2028 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.
Contracts and legal deadlines that specify calendar days count every day from 21 January 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.