School Term 3 ends toward the close of September or the start of October, depending on the state. September 2028 carries the final weeks of Term 3 in every state, ahead of the short holiday break before Term 4 begins, the last school term of the calendar year, running through to the long summer break in December. Father's Day falls on the first Sunday of September every year.
The working-day count for September 2028 subtracts King's Birthday only in Western Australia, where the holiday falls on the last Monday of the month. Every other state and territory counts the full run of weekdays across the 30 days of September without a public holiday to subtract from the standard five-day working week that runs through the rest of the country. September closes the financial year's first quarter, which runs from July to September.
September 2028 closes with the football finals concluded and daylight saving about to resume in the south-eastern states. October follows with Labour Day long weekends in three states, the spring racing carnival building, and the self-lodgement tax deadline approaching on 31 October, four months after the lodgement window opened. Father's Day falls on the first Sunday of September every year.