Western Australia marks King's Birthday on the last Monday of September, months after every other state observes the same public holiday name. 1 September 2029 carries this public holiday only in Western Australia, with the rest of the country working through an ordinary day under a completely different holiday calendar for the same occasion.
Sport fixtures, markets and family events across Australia are concentrated on Saturdays more than any other day of the week. 1 September 2029 falls on Saturday, outside the standard working-day count used on this page, between the working week that ends on Friday and the one that begins the following Monday.
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 1 September 2029 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.