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 King's Official Birthday (alternatively the Queen's Official Birthday when the monarch is female) is the selected day in the United Kingdom and most Commonwealth realms on which the birthday of the monarch is officially celebrated in those countries. It does not necessarily correspond to the date of the monarch's actual birth.