Portal:Australia/Anniversaries/December/December 3
- 1797 – George Bass sets out from Sydney in a whaleboat with six oarsmen to explore south along the coast.
- 1825 – Van Diemen's Land becomes independent from New South Wales, the Legislative Council of Tasmania is established and George Arthur becomes Governor.
- 1854 – The Eureka Stockade takes place.
- 1999 – The Glenbrook train disaster occurs on the CityRail network in New South Wales. Seven people are killed.