20th of June
1909
- Actor Errol Flynn was born in Battery Point, Tasmania, on the 20th of June 1909.
1938
- Joan Kirner, the 42nd Premier of Victoria, was born in Essendon, Victoria on the 20th of June 1938.
1967
- Actress Nicole Kidman was born in Honolulu, Hawaii, on this day in 1967.
1974
- World Champion snooker player Horace Lindrum passed away in Sydney on this day in 1974 aged 62.
- Skyhooks played at Station Hotel, Prahran on this day in 1974.
1980
- Doug Parkinson played at The Manzil Room, Kings Cross on this day in 1980.
- The Radiators played at The Playroom, Tallebudgera on this day in 1980.
- Cold Chisel played at Arkaba Hotel, Fullarton on this day in 1980.
1988
- On this day in 1988 the new $2 coin went into circulation, replacing the original Australian $2 banknote.
The top 10 singles on the national chart for the 20th of June 1988:
- What A Wonderful World, Louis Armstrong
- The Flame, Cheap Trick
- I Want You Back, Bananarama
- The Dock Of The Bay, Michael Bolton
- Pink Cadillac, Natalie Cole
- Blue Monday 1988, New Order
- Get Outta My Dreams, Billy Ocean
- Love Is A Bridge, Little River Band
- When Will I Be Famous, Bros
- Could’ve Been, Tiffany
2004
- Jim Bacon, the 41st Premier of Tasmania, passed away on this day in Hobart, Tasmania in 2004 aged 54.