15* Days Which Would Be More Appropriate as Australia Day than January 26

Photo: Phil Whitehouse, Wikimedia Commons, Creative Commons Attribution 2.0 Generic

*I'm adding some additional brilliant brain farts as they come

1 January — Constitution of Australia comes into force (1901)
3 March — Commencement of the Australia Act (1986), which finally instituted Australia's legal independence from the UK
3 March — Graham Kennedy's infamous 'crow call' on The Graham Kennedy Show (1975)
3 March — Tony Abbott's then-record 'eight flag' press conference, featuring the PM flanked by — you guessed it — EIGHT Australian flags (2015)*
15 March — First Cricket Test Match (1877)
16 March — Advisory Council of Science and Industry formed by PM Billy Hughes. It would become CSIRO (1916)
18 March — Neighbours first aired (1985)
29 March — First Federal Election (1901)
30 April — Nikki Webster's birthday (1987)
21 May — Assent of Commonwealth Electoral Act 1962 extending electoral franchise to Indigenous Australians for the first time
27 May — Henry Parkes' birthday (1815)
27 May — Referendum on the Constitution Alteration (Aboriginals) 1967, recognising Indigenous Australians in the Australian population
13 June — Vegemite first goes on sale (1923)
23 June — Tony Abbott's record 'ten flag' press conference, featuring the PM flanked by — you guessed it — TEN Australian flags (2015)
4 September — Steve Irwin is taken too soon by some form of marine monster of nightmares (2006)
5 September — Naomi Robson wears lizard on shoulder while reporting on the death of Steve Irwin (2006)
24 September — Sydney wins hosting rights to the 2000 summer Olympics (1993)
26 September — Australia II wins seventh and final race to claim the America's Cup (1983)
24 November — John Howard's Coaltion government is defeated; John Howard loses his own seat of Bennelong (2007)
26 November — Official launch of the Holden FX (1948)

*temporary record superseded in June 2015