December is the busiest trading month of the year for retail and hospitality, with Christmas shopping and the summer sales season running through most of the 31-day month. December 2028 closes the financial year's second quarter, which runs from October to December, and the fourth calendar quarter of 2028, both quarters closing on the very same date, 31 December. Summer begins on 1 December, the first day of December.
Whether Christmas Day and Boxing Day deliver a long weekend in December 2028 depends on which days of the week the two fixed dates fall on and on state-specific rules for shifting a holiday that lands on a weekend. Leave planned around the two dates commonly extends through the week between Christmas and New Year. The school year ends for most students partway through December, opening the long summer holidays.
The shift from December into January carries the country from one calendar year into the next without pause, since the school summer holidays and daylight saving both continue unbroken across the change of year. December 2028 hands over directly to a new twelve-month cycle that begins on 1 January with its own run of public holidays already fixed. Summer begins on 1 December, the first day of December.