- 1494 – Treaty of Tordesillas signed, dividing the world outside of Europe in an exclusive duopoly between the Spanish Empire and the Portuguese Empire. The longitudes in the treaty coincide with the Western Australia border.
- 1813 – Birth date of Sir Redmond Barry, the judge who sentenced Ned Kelly.
- 1841 – Darlinghurst Gaol took in its first prisoners.
- 1980 – Paul Everingham's Country Liberal Party government is re-elected in the Northern Territory.
- 1998 – Susie Maroney swims from Mexico to Cuba, covering the longest distance ever swum without flippers in open sea.