15th of September
1879
- The 10th Prime Minister of Australia, Joseph Lyons, was born in Stanley, Tasmania, on the 15th of September 1879. He was Prime Minister from the 6th of January 1932 to the 7th of April 1939.
1915
- The oldest running cinema in mainland Australia, The Empire Picture Theatre (now The New Empire Cinema), opened in Bowral, New South Wales on this day in 1915.
1952
- Actor Paula Duncan was born in Cooma, New South Wales, on this day in 1952. She is best known for her roles in Number 96, The Young Doctors, Cop Shop, Prisoner, Richmond Hill, and Home and Away.
1974
- Skyhooks played at Sydney Opera House, Sydney on this day in 1974.
1975
The top 10 singles on the national chart for the 15th of September 1975:
- Love Will Keep Us Together, The Captain and Tenille
- Fox On The Run, The Sweet
- All My Friends Are Getting Married, Skyhooks
- Roll Over Lay Down, Status, Quo
- Bony Maronie, Hush
- The Last Farewell, Roger Whittaker
- Life, Sherbet
- The Tears I Cry, The Glitter Band
- The Hustle, Van McCoy & The Soul City Symphony
- Oh Boy, Diana Trask
1980
- Skyhooks played at Sydney Cove Tavern, Circular Quay on this day in 1980.
- INXS played at Wollongong Leagues Club, Wollongong on 15th of September 1980.
- The single Xanadu by Olivia Newton-John peaked at number 2 on this day in 1980.
2000
- The games of the XXVII Olympiad were opened in Sydney, NSW, on the 15th of September 2000.
2015
- Malcolm Turnbull became the 29th Prime Minister of Australia after challenging the leadership of incumbent Prime Minister, Tony Abbott on September 15th, 2015.