The AFL finals series runs through most of September, culminating in the Grand Final at the very end of the month or the start of October. 12 September 2030 falls inside this finals fixture list, alongside the NRL finals running on a similar schedule, with both codes crowning premiers within weeks of each other.
A public holiday landing on a Thursday sits one day short of the weekend, and workers commonly take the Friday after it as annual leave to turn a single day off into a four-day break. Thursday 12 September 2030 falls on this day of the week, one working day ahead of Friday and two ahead of the weekend that follows it.
The week number shown for 12 September 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.