Portal:Australia/Anniversaries/December/December 20
- 1915 – Completion of ANZAC evacuation from Gallipoli before dawn.
- 1917 – The second plebiscite on the issue of military conscription was held; it was defeated.
- 1928 – Hubert Wilkins makes the first flight over Antarctica in his Lockheed Vega San Francisco.
- 1961 – Earle Page, the eleventh Prime Minister of Australia dies.
- 1991 – Paul Keating becomes the twenty-fourth Prime Minister of Australia.