Portal:Australia/Anniversaries/March/March 12
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- 1868 – Prince Alfred, Duke of Edinburgh, was picnicking in the beach-front suburb of Clontarf, when Henry James O'Farrell fired a revolver into the Duke’s back, in Australia's first attempt of political assassination.
- 1913 – Canberra is named by Lady Denman, an event celebrated in the Australian Capital Territory on the third Monday in March as Canberra Day.
- 1921 – Edith Cowan becomes the first woman elected to an Australian parliament.
- 1936 – Western Australia makes voting compulsory in state elections.
- 1980 – James Miller is sentenced to life in prison for committing the Truro murders.