Western Australia marks King's Birthday on the last Monday of September, months after every other state observes the same public holiday name. 2 September 2028 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.
Saturday 2 September 2028 is a weekend day under the standard Monday-to-Friday working pattern and does not count toward the working-day total shown above. Retail, hospitality, healthcare and emergency services staff commonly work rostered shifts on this day regardless of the standard week that applies to most other industries and workplaces across the country.
2028 has 366 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.