Australia By laura and andrea Feb 26, 1606 Dutch navigator Willem Janszoon sees the Cape York penninsula Apr 23, 1780 Loss of the British Goverment's American colonies Jan 26, 1788 A camp was set up and the flag raised at Sydney Cove, Port Jackson,a date which became Australia's national day, Australia Day. Period: Feb 21, 1901 to Feb 21, 1927 Melbourne is chosen as the temporary seat of government while Canberra is being constructed Nov 28, 1914 Australia joins Britain in fighting World War I,