No fixed public holiday falls in July in most states. 21 July 2030 runs as an ordinary working day across the 31 days of the month, sitting between the King's Birthday long weekend in June and the Ekka holiday that Brisbane observes the following month, in a stretch otherwise unbroken by public holidays.
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. 21 July 2030 falls on Sunday, a working day for these shift-based industries even though it sits outside the standard working-day count above.
The week number shown for 21 July 2030 counts full weeks from the start of 2030, a figure used in payroll cycles, rostering and any planning done in weekly or fortnightly blocks rather than by calendar month. Businesses running fortnightly pay runs rely on this figure to track which of the two alternating pay weeks a date falls in.