Queen's Official Birthday
June 10, Monday
ACT, Victoria, New South Wales, Northern Territory, Tasmania, South Australia
September 30, Monday
Western Australia
October 7, Monday
Queensland
The Queen's Birthday is the day officially celebrated as the birthday of the monarch of the United Kingdom and the Commonwealth realms. In the UK, this day is traditionally observed in June, although the actual birthday of the monarch may be at a different time of year. For example, Queen Elizabeth II was born on April 21, but her official birthday was celebrated on the second Saturday in June.