Queensland, Western Australia and the Northern Territory do not observe daylight saving, so from October onward those three run an hour behind the south-eastern states. 23 October 2028 falls inside this seasonal clock split, which lasts until the following April when the south-east moves back onto standard time.
Monday 23 October 2028 is the first working day of its week. Any bill, deadline or rostered task set for the preceding Saturday or Sunday moves to this date under standard business-day rules, and the working-day count above treats it as day one of a fresh five-day working stretch that runs through to Friday, before the weekend resets the cycle again.
A public holiday that falls on a Monday or a Friday produces a three-day weekend without using any annual leave, which is why long-weekend planning around 23 October 2028 depends on which day of the week the nearest public holiday falls on. A midweek holiday delivers no such automatic extension, though many workers bridge it with a single day of leave.