Spring begins on 1 September, and by 13 September 2030 warmer days return across the southern states after the winter months. The AFL finals series runs through September, ahead of the Grand Final that follows in late September or early October, drawing national attention as one of the biggest fixtures on the Australian sporting calendar.
Some employers close early or run a shortened day on Friday, ahead of the weekend that follows. 13 September 2030 falls on this day, the last of the five working days counted in the total shown above for its week, immediately before Saturday and Sunday begin the two-day break most standard working arrangements observe.
The quarter containing 13 September 2030 is based on the calendar year running January to December, a separate system from the Australian financial year, which runs from 1 July to 30 June and splits into its own four quarters. Businesses often track both systems side by side, one for tax filings and one for calendar-year planning.