11.00am (AEST) – Defence Minister Richard Marles addresses the Submarine Institute of Australia conference – Adelaide

2023-24 Budget handed down in NSW

Start of Dementia Awareness Week (until 25 September)

Start of Headache & Migraine Week (on until 23 September)

Start of Global Entrepreneurship Congress – Melbourne

Talk Like a Pirate Day (supporting families affected by childhood cancer)

National Thank A Cop Day

Start of Milan Fashion Week (until 25 September)

Birthdays for Twiggy (1949) and Jimmy Fallon (1974)

Anniversary of:
• New Zealand becoming the first country to grant all women the right to vote (1893)
• Chubby Checker’s The Twist hitting #1 on the Billboard Hot 100 (1960)
• the first documented use of emoticons by computer scientist Scott Fahlman (1982) 😉
• the premiere of Goodfellas (1990)
• the death of Slim Dusty (2003)