Twentieth century timeline By cel Period: Jan 1, 1900 to Dec 31, 2000 Twentieth century timeline Jul 28, 1914 End of WW2 Jun 28, 1919 Treaty of Versailles Jul 24, 1920 The Jazz age Jul 24, 1926 Invention of the television Oct 24, 1929 Wall street market crash Jul 24, 1930 The great depression Jan 26, 1938 Day of mourning Sep 1, 1939 Start of WW2 Feb 19, 1942 Boming of Darwin Aug 6, 1945 Atomic bobming of Hiroshima Dec 7, 1947 Japanese attack on Pearl Harbour Dec 10, 1948 Declaration of human rights Jul 24, 1956 melbourne olympics Oct 14, 1962 Cuban missile crisis Aug 28, 1963 MLK Jr 'I have a dream' speech Feb 21, 1964 Australian freedom rides Jul 24, 1973 Invention of the mobile phone Jul 24, 1974 Invention of the internet Sep 26, 1986 release of Crocodile Dundee Nov 10, 1989 Fall of the Berlin wall Nov 20, 1989 United Nations conventions on the right of the child