Portal:Australia/Anniversaries/October/October 23
- 1937 – The ACTU calls on the government to boycott trade with Japan, following the Japanese invasion of China.
- 1942 – The Battle of El Alamein, in Egypt, began with a massive artillery bombardment preceding attacks by British and Australian divisions.
- 1978 – Archie Thompson, Melbourne Victory football (soccer) player, is born in New Zealand.
- 1991 – First general strike in 65 years takes place in New South Wales.