Queen's Birthday in Australia in 2017
The Queen's Birthday holiday is a moveable feast celebrating the birthday of Queen Elizabeth II who is not only Queen of Great Britain but also Queen of Australia.
The holiday also marks the start of the Australian ski season.
On this day, businesses will generally be closed. Shops may open, but observe restricted trading hours. Transport may operate on a Saturday or reduced timetable.
In Queensland, the Queen's Birthday was moved to the first Monday in October from 2016.
In Western Australia, the Queen's Birthday holiday is celebrated in late September or early October.
In 2011 the date in Western Australia was moved from Monday 3 October to Friday 28 October 2011 so that it coincided with the Commonwealth Heads of Government Meeting taking place in Perth at that time.
The Queen's actual birthday is neither in June nor October but in April.
The sovereign's birthday has been officially celebrated since 1748. It is a tradition that if a British monarch has a birthday that doesn't fall in the UK summer months, they can have a second official birthday. This is because having a summer birthday means a higher chance of good weather during the Trooping the Colour parade for the monarch's birthday.
Elizabeth Alexandra Mary of the House of Windsor was born on April 21st, 1926.
In 1952, after the death of her father, King George VI, Elizabeth succeeded to the throne and was known thereafter as Queen Elizabeth II.
The Queen is the monarch of 16 countries, the United Kingom and 15 commonwealth realms.
Queen Elizabeth II continues to reign as Queen of Australia after a referendum in 1999 which resulted in the retention of Australia's constitutional monarchy.