1997 The United Kingdom returned Hong Kong to the People's Republic of China
1921 The Communist Party of China (CPC) was formed, and Chen Duxiu was elected its leader
1807 Innovation of the steamboat
1940 Winston Churchill became British Prime Minister, replacing Neville Chamberlain
1836 Spain recognized the independence of Mexico by signing the Santa María–Calatrava Treaty
2003 The Spirit Rover was launched by NASA to start the Mars Exploration Rover mission
1963 President John F. Kennedy signed the United States Equal Pay Act into law
1901 Guglielmo Marconi sent and received the first wireless message across the Atlantic Ocean
1903 Innovation of the aeroplane
1926 John Logie Baird gave the first public demonstration of a live television system
1945 International Monetary Fund was formally established by 29 member countries
1932 Radio City Music Hall opened in New York City
1965 United States President Lyndon B. Johnson signed the Voting Rights Act into law
1964 United States President Lyndon B. Johnson signed the Civil Rights Act into law
1895 German physicist Wilhelm Conrad Röntgen discovered X-Rays