- 1826 – Birth of George Goyder, surveyor-general of South Australia.
- 1856 – Queen Victoria makes Norfolk Island a separate settlement from Tasmania to be administered by the Governor of New South Wales.
- 1913 – Joseph Cook becomes the sixth Prime Minister of Australia.
- 1953 – British and Australian governments announced Britain was developing atomic weapons and they would be tested in Australia.
- 1978 – The first Sydney Gay and Lesbian Mardi Gras is held to mark International Gay Solidarity Day.
- 1987 – Christopher Skase buys the Seven Network.
- 1992 – Nick Greiner resigns as Premier of New South Wales after corruption finding against him.
- 2010 – Julia Gillard becomes the first female Prime Minister of Australia.