Mid-year school holidays run for two weeks somewhere across July in every state, splitting the school year's second half from its first. 23 July 2028 falls inside July, the coldest month of the year across the southern states and the peak of the ski season further south in the Snowy Mountains and Victorian Alps.
Retail, hospitality, healthcare and emergency services rosters regularly schedule staff to work on Sundays as part of standard shift patterns that do not follow the Monday-to-Friday week. 23 July 2028 falls on Sunday, a working day for these shift-based industries even though it sits outside the standard working-day count above.
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.