Portal:Australia/Anniversaries/April/April 25
- 1829 – Captain Charles Fremantle arrives off the coast of the present-day state of Western Australia, aboard HMS Challenger, with the intention of establishing the Swan River Colony.
- 1896 – At the 1896 election in South Australia, women exercise their right to vote for the first time, having been given limited suffrage the previous year.
- 1915 – The Gallipoli Campaign commences, with the Australian and New Zealand Army Corps (ANZAC) landing at Anzac Cove (painting pictured) on the Gallipoli peninsula in present-day Turkey.
- 1918 – In the Second Battle of Villers-Bretonneux, Australian and British troops counter-attack German forces near Amiens, France, with Clifford Sadlier later receiving the Victoria Cross for his actions.
- 1927 – Anzac Day is uniformly observed in all Australian states for the first time.
- 1975 – The Australian embassy in Saigon, South Vietnam, is closed and staff evacuated prior to the Fall of Saigon.