- 1770 – Having died of tuberculosis on April 30, Forby Sutherland is buried at Kurnell, New South Wales, becoming the first British subject buried in Australia.
- 1802 – Explorer Matthew Flinders becomes the first European to climb the You Yangs, a series of granite ridges above the Werribee Plain in Victoria.
- 1891 – The first May Day marches in Australia are held at Barcaldine, Queensland, in support of a shearers' strike.
- 1946 – The Pilbara strike commences with 800 Aboriginal pastoral workers walking off stations in the Pilbara and Kimberley regions of Western Australia.
- 1997 – HM Prison Pentridge (entrance gates pictured) in Coburg, Victoria, the site of the last execution in Australia, closes after 145 years of operation.