Spring begins on 1 September across Australia. September 2026 brings warmer days back to the southern states after the winter months, while the tropical north moves out of its dry season toward the wet season and cyclone risk that returns in November and runs through to the following April, closing the seasonal loop that began the previous wet season. Spring begins on 1 September, the first day of September.
The working-day count for September 2026 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.
The shift from September into October brings daylight saving back into effect on the first Sunday of the month for New South Wales, Victoria, South Australia, Tasmania and the ACT. September 2026 hands over a spring month without a national public holiday to one carrying three separate Labour Day dates and a tax deadline. The AFL finals series runs through most of September, ahead of the Grand Final.
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