1920s

Centuries: 19th century - 20th century - 21st century

Decades: 1870s 1880s 1890s 1900s 1910s - 1920s - 1930s 1940s 1950s 1960s 1970s

Years: 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929

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Events and trends

Technology

• John Logie Baird invents the first working television system
• Charles Lindbergh becomes the first person to fly solo non-stop across the Atlantic Ocean
• Penicillin is discovered by Sir Alexander Fleming. (1928)

Science

• Great advances in quantum mechanics
  • Wave mechanics and the Schrödinger equation
  • Werner Heisenberg formulates the uncertainty principle
  • Paul Dirac's unification of quantum mechanics with special relativity

War, peace and politics

• Rise of communism after World War I
• The Red Scare
• Irish Civil War
• Southern Ireland gains independence from the United Kingdom in 1922
• Turkish War of Independence
• First Labour Government of Ramsay MacDonald formed in the United Kingdom
• Kellogg-Briand Pact to end war

Economics

• Economic boom ended by "Black Thursday" (October 24, 1929); the stock market crashes, leading to the Great Depression

Culture, religion

• Youth culture of The Lost Generation; Flappers, Charleston, Bobbed Hair
• Prohibition — legal attempt to end consumption of alcohol in the USA
• "The Jazz Age" — Jazz and jazz-influenced dance music widely popular
• Rise of broadcast radio as an entertainment medium
• Start of commercially viable "Talking Pictures" (motion pictures with sound tracks)
• Beginning of surrealist movement
• Beginning of the Art Deco movement

Others

World leaders

• President Sun Yat-sen (Republic of China)
• President Chiang Kai-shek (Republic of China)
• President Paul von Hindenburg (Germany)
• King Victor Emmanuel III (Italy)
• Prime Minister Benito Mussolini (Italy)
• President W.T. Cosgrave (Irish Free State)
• President Mustafa Kemal (Turkey)
• Emperor Hirohito (Japan)
• Pope Pius XI
• Vladimir Lenin (Soviet Union)
• Joseph Stalin (Soviet Union)
• King George V (United Kingdom)
• Prime Minister David Lloyd George (United Kingdom)
• Prime Minister Andrew Bonar Law (United Kingdom)
• Prime Minister Stanley Baldwin (United Kingdom)
• Prime Minister Ramsay MacDonald (United Kingdom)
• President Woodrow Wilson (United States)
• President Warren G. Harding (United States)
• President Calvin Coolidge (United States)

Entertainers

• Charlie Chaplin
• George Gershwin
• Duke Ellington
• Fletcher Henderson
• Al Jolson
• Jelly Roll Morton
• Cole Porter
• Bessie Smith
• Rudy Vallee
• Paul Whiteman

Sports figures

• Babe Ruth (U.S. baseball player)