Daylight saving ends on the first Sunday of April in New South Wales, Victoria, South Australia, Tasmania and the ACT, putting the clocks back an hour. 11 April 2027 falls in the month where those five states move off daylight time, while Queensland, Western Australia and the Northern Territory keep the same clock they have run all year without any change.
Any deadline or bill payment due on Sunday 11 April 2027 moves to the following Monday under standard business-day rules, since Sunday sits outside the working week this page counts by default. This convention applies consistently across contracts, invoices and statutory deadlines throughout Australia, regardless of which state or territory is involved.
2027 has 365 days on the calendar. Leap years add a single extra day to February, giving those years 366 days instead of 365 and shifting the day-of-year number for every date from March onward by one compared with an ordinary year. This is the only irregularity in the length of the Australian calendar year.