Children's Day in Taiwan and Hong Kong
1721 – Robert Walpole took office as First Lord of the Treasury, Chancellor of the Exchequer and Leader of the House of Commons, essentially becoming the first British Prime Minister even though the term 'Prime Minister' was not used at the time.
1859 – Bryant's Minstrels premiered the popular American song 'Dixie' in New York City as part of their blackface minstrel show.
1949 – Twelve nations signed the North Atlantic Treaty, creating NATO, an organization that constitutes a system of collective defense whereby its member states agree to mutual defense in response to an attack by any external party.
1968 – American civil rights leader Martin Luther King, Jr. (pictured) was assassinated on the balcony of the Lorraine Motel in Memphis, Tennessee, USA.
1969 – Surgeons Denton Cooley and Domingo Liotta implanted the first total artificial heart.
1975 – Bill Gates and Paul Allen founded Microsoft in Albuquerque, New Mexico, USA, to develop and sell BASIC interpreters for the Altair 8800."
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