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1927 (MCMXXVII) was a common year starting on Saturday of the Gregorian calendar, the 1927th year of the Common Era (CE) and Anno Domini (AD) designations, the 927th year of the 2nd millennium, the 27th year of the 20th century, and the 8th year of the 1920s decade.
- January 1
- The Cristero War erupts in Mexico when Catholic rebels attack the government, which had placed heavy restrictions on the Catholic Church.
- The British Broadcasting Company becomes the British Broadcasting Corporation, when it is granted a Royal Charter of incorporation. John Reith becomes the first Director-General.
- January 7 – The first transatlantic telephone call is made via radio from New York City to London.
- January 7 – The Harlem Globetrotters play their first ever road game in Hinckley, Illinois.
- January 9 – A military rebellion is crushed in Lisbon, Portugal.
- January 9 – A fire at the Laurier Palace movie theatre in Montreal, Quebec, Canada, kills 78 children.
- January 10 – Fritz Lang's futuristic film Metropolis is released in Germany.
- January 11 – Louis B. Mayer, head of film studio Metro-Goldwyn-Mayer (MGM), announces the creation of the Academy of Motion Picture Arts and Sciences, at a banquet in Los Angeles, California.
- January 15 – Teddy Wakelam gives the first sports commentary on BBC Radio.
- January 19 – Great Britain sends troops to China to protect foreign nationals from spreading anti-foreign riots in Central China.
- January 24 – U.S. marines invade Nicaragua by orders of President Calvin Coolidge, intervening in the Nicaraguan Civil War and remaining in the country until 1933.
- January 30 – Right-wing veterans and the Republikanischer Schutzbund clash in Schattendorf, Austria, with two fatalities resulting (see also July 15).
- May – Philo Farnsworth of the United States transmits his first experimental electronic television motion pictures, as opposed to the electromechanical TV systems that others have used before.
- May 9 – The Australian Parliament convenes for the first time in Canberra, Australian Capital Territory. Previously, the Parliament had met in Melbourne, Victoria.
- May 11 – The Academy of Motion Picture Arts and Sciences, the "Academy" in "Academy Awards", is founded.
- May 12 – British police officers raid the office of the Soviet trade delegation in London.
- May 13 – King George V proclaims the change of his title from King of the United Kingdom of Great Britain and Ireland to King of Great Britain and Northern Ireland.
- May 17 – U.S. Army aviation pioneer Major Harold Geiger dies in the crash of his Airco DH.4 airplane, at Olmsted Field, Pennsylvania.
- May 18 – Bath School disaster: a series of violent attacks results in 45 deaths, mostly of school children, in Bath Township, Michigan.
- May 20 – By the Treaty of Jeddah, the United Kingdom recognizes the sovereignty of Ibn Saud over the Kingdom of Hejaz and Nejd, the future Saudi Arabia.
- May 20–21 – Charles Lindbergh makes the first solo, nonstop transatlantic airplane flight, carried out from New York City to Paris, France, in his single-engined aircraft, the Spirit of St. Louis.
- May 22 – The 7.6 Mw Gulang earthquake affects Gansu in northwest China with a maximum Mercalli intensity of XI (Extreme), leaving over 40,000 dead.
- May 23 – Nearly 600 members of the American Institute of Electrical Engineers and the Institute of Radio Engineers view a live demonstration of television at the Bell Telephone Building in New York City, just over a year after John Logie Baird of Scotland had first demonstrated an electromechanical television system to the members of the Royal Society in London.
- May 24 – The United Kingdom cuts its diplomatic relations with the Soviet Union due to revelations of espionage and underground agitation.
: Solo flight New York to Paris
- June – The volcanic island of Anak Krakatau begins to form in the Sunda Strait.
- June 4 – Yugoslavia severs diplomatic relations with Albania.
- June 4–6 – Clarence Chamberlin and Charles Albert Levine take off from Roosevelt Field, New York, and fly to Eisleben, Germany, in the Wright-Bellanca WB-2 Columbia aircraft Miss Columbia, two weeks after Charles Lindbergh's historic solo flight.
- June 7 – Pyotr Voykov, the Soviet ambassador to Poland, is murdered.
- June 9 – The Soviet Union executes 20 for alleged espionage.
- June 13
- June 28 – Spanish airline Iberia is established.
- June 29 – Solar eclipse of June 29, 1927: A total eclipse of the sun takes place over Wales, northern England, southern Scotland, Norway, northern Sweden, northmost Finland, and the northmost extremes of Russia.
- June 29-July 1 – Commander Richard E. Byrd, Bernt Balchen, George Noville, and Bert Acosta take off from Roosevelt Field, New York, in the Fokker Trimotor airplane America and cross the Atlantic to the coast of France, having to ditch there because of bad weather; all four men survive the emergency landing.
- July 1 – The Food, Drug, and Insecticide Administration (FDIA) is established as a United States federal agency.
- July 10 – Kevin O'Higgins, Vice-President of the Executive Council of the Irish Free State and Minister for Justice, is assassinated by the anti-Treaty Irish Republican Army in Dublin.
- July 11 – The 1927 Jericho earthquake strikes Palestine, killing around 300 people. The effects are especially severe in Nablus, but damage and fatalities are also reported in many areas of Palestine and Transjordan such as Amman, Salt, Jordan, and Lydda.
- July 13 (Wednesday, Tamuz 13, 5687): 12:30 – Rebbe Yosef Yitzchak Schneersohn is freed from the imprisonment which began on June 15 (Wednesday, Sivan 15, 5687) at 02:15 in exile in the Russian town of Kostroma.
- July 15 – July Revolt of 1927: 85 protesters and five policemen are left dead after the police in Vienna fire on an angry crowd, mostly members of the Social Democratic Party of Austria; more than 600 people are injured.
- July 24 – The Menin Gate is dedicated as a war memorial at Ypres, Belgium.
- October – The Fifth Solvay Conference, held in the latter half of the month, establishes the acceptance of the Copenhagen interpretation.
- October 4 – Carving of the sculptures at Mount Rushmore, South Dakota, begins.
- October 6 – The Jazz Singer, starring Al Jolson, premieres at the Warner Theater in New York City. Although not the first sound film and containing very little recorded speech, it is the first to become a box-office hit, popularizing "talkies" (although silent films continue to be made for some time).
- October 8 – The "Murderers' Row" team of the New York Yankees complete a four-game sweep of the Pittsburgh Pirates in the World Series baseball championship in the United States.
- October 9 – The Mexican government crushes a rebellion in Veracruz.
- October 18 – The first flight of Pan American Airways takes off from Key West, Florida, bound for Havana, Cuba.
- October 25 – The Italian steamship Principessa Mafalda capsizes off Porto Seguro, Brazil. At least 314 people are killed.
- October 27
- Queen Wilhelmina of the Netherlands opens the Meuse-Waal Canal in Nijmegen, Holland.
- At 5:50 a.m. a ground fault gives way, causing the mine and part of the town of Worthington to collapse into a large chasm located in Ontario. Nobody is injured in the incident, as the area has been evacuated the night before after a mine foreman noticed abnormal rock shifts in the mine.
- December – The Communist Party Congress condemns all deviation from the general party line in the USSR.
- December 1 – Chiang Kai-shek marries Soong Mei-ling in Shanghai.
- December 2 – Following 19 years of Ford Model T production, the Ford Motor Company unveils the Ford Model A as its new automobile.
- December 3 – Putting Pants on Philip, the first Laurel and Hardy film, is released.
- December 14 – Iraq gains independence from the United Kingdom.
- December 15 – Marion Parker, 12, is kidnapped in Los Angeles. Her dismembered body is found on December 19, prompting the largest manhunt to date on the West Coast for her killer, William Edward Hickman, who is arrested on December 22 in Oregon.
- December 17 – The United States Navy submarine S-4 is accidentally rammed and sunk by the United States Coast Guard cutter John Paulding off Provincetown, Massachusetts, killing everyone aboard despite several unsuccessful attempts to raise the submarine.
- December 19 – Three members of the revolutionary movement for Indian independence – Pandit Ram Prasad Bismil, Thakur Roshan Singh and Ashfaqulla Khan – are executed by the British Raj. Rajendra Nath Lahiri has been executed two days before.
- December 20 – Letalski center Maribor is established in Maribor; it will be the oldest surviving operating major flying club in the Balkans.
- December 27 – Kern and Hammerstein's musical play, Show Boat, based on Edna Ferber's novel, opens on Broadway and then goes on to become the first great classic of the American musical theater.
- December 30 – The first Asian commuter metro line, the Tokyo Metro Ginza Line in Japan, opens.
- March 1
- March 2 – Roger Walkowiak, French road bicycle racer (d. 2017)
- March 3 – Pierre Aubert, member of the Swiss Federal Council (d. 2016)
- March 4
- March 5
- March 6
- March 7 – James Broderick, American actor (d. 1982)
- March 8
- March 10
- March 11
- March 12 – Raúl Alfonsín, former President of Argentina (d. 2009)
- March 13
- March 15
- March 16
- March 17 – Roberto Suazo Córdova, President of Honduras
- March 18 – George Plimpton, American writer and actor (d. 2003)
- March 20
- March 21 – Hans-Dietrich Genscher, German politician (d. 2016)
- March 23 – Mato Damjanović, Croatian chess grandmaster (d. 2011)
- March 24 – Martin Walser, German author
- March 25
- March 26
- March 27
- March 29 – John Vane, British pharmacologist, Nobel Prize laureate (d. 2004)
- March 30 – Robert Armstrong, Baron Armstrong of Ilminster, English politician and civil servant
- March 31
- May 1
- May 2 – Michael Broadbent, English wine critic and writer
- May 3 – Jean-Paul Martin-du-Gard, French runner (d. 2017)
- May 4
- May 5 – Pat Carroll, American actress
- May 6 – Ettore Manni, Italian actor (d. 1979)
- May 8 – Josefina Samper, Spanish syndicalist and feminist (d. 2018)
- May 9
- May 10 – Nayantara Sahgal, Indian author
- May 11
- May 13
- May 14
- May 17 – Marilyn Hall, Canadian-born American television producer (d. 2017)
- May 18 – Sir Richard Body, English politician (d. 2018)
- May 20 – Bud Grant, Canadian and American football coach
- May 21 – Chuck Stewart, American photographer (d. 2017)
- May 22
- May 23 – Dieter Hildebrandt, German comedian (d. 2013)
- May 25
- May 26
- May 28
- May 30
- May 31
- July 1
- July 2
- July 3
- July 4
- July 5
- July 6
- July 7
- July 8
- July 9
- July 10
- July 11
- July 12
- July 13
- July 14
- July 15
- Håkon Brusveen, Norwegian cross-country skier
- Ann Jellicoe, British playwright, theatre director and actress
- Nan Martin, American actress (d. 2010)
- Gloria Pall, American model, showgirl, actress, author and businesswoman (d. 2012)
- Caerwyn Roderick, British Labour Party politician (d. 2011)
- Ted Slevin, English professional rugby league footballer
- Carmen Zapata, American actress (d. 2014)
- Leo C. Zeferetti, American politician
- July 16
- July 17
- July 18
- July 19
- July 20
- July 21
- July 22
- July 26 – Danny La Rue, Irish-born British drag entertainer (d. 2009)
- July 27 – John Seigenthaler, American journalist, writer, and political figure (d. 2014)
- July 28 – John Ashbery, American poet (d. 2017)
- July 30
- August 2 – Fredrik Bull-Hansen, Norwegian military officer (d. 2018)
- August 4
- August 5 – Rolf Wütherich, German automotive engineer and racer (d. 1981)
- August 6
- August 7
- August 8 – Johnny Temple, American baseball player (d. 1994)
- August 9 – Marvin Minsky, American computer scientist, Turing Award winner (Artificial intelligence) (d. 2016)
- August 10 – Eivind Eckbo, Norwegian politician, lawyer and farmer (d. 2017)
- August 11
- August 12 – Porter Wagoner, American country singer (d. 2007)
- August 13 – David Padilla, 64th President of Bolivia (d. 2016)
- August 14
- August 15 – Carmela Marie Cristiano, American Roman Catholic nun (d. 2011)
- August 17
- August 18 – Rosalynn Carter, First Lady of the United States
- August 19
- August 20 – Peter Oakley, also known as geriatric1927, British vlogger (d. 2014)
- August 21 – Thomas S. Monson, American religious leader (d. 2018)
- August 23
- August 25 – Althea Gibson, African-American tennis player (d. 2003)
- August 26
- August 27 – Fouad al-Tikerly, prominent Iraqi novelist and writer (d. 2008)
- August 29 – A. Ross Eckler Jr., American logologist, statistician and author (d. 2016)
- August 30
- September 2 – Gene Rhodes, American basketball player and coach (d. 2018)
- September 3 – Br. John Hamman S.M. (d. 2000), close-up magician, inventor, Marianist brother (d. 2000)
- September 4 – Antônio Carlos Magalhães, Brazilian politician (d. 2007)
- September 5 – Paul Volcker, American economist and academic
- September 7 – Eric Hill, English author and illustrator (d. 2014)
- September 10
- September 11
- September 13 – Laura Cardoso, Brazilian actress
- September 15
- September 16
- September 17 – George Blanda, American football quarterback and placekicker (d. 2010)
- September 18 – Muriel Turner, Baroness Turner of Camden, British politician (d. 2018)
- September 19
- September 21
- September 22
- September 23
- September 25
- September 27 – Steve Stavro, Canadian businessman and sports team owner (d. 2006)
- September 28 – Alícia Raquel de Videla, former first Lady of Argentina
- September 29
- September 30 – W. S. Merwin, American poet
- October 1
- October 6 – Antony Grey, English gay rights activist (d. 2010)
- October 8 – César Milstein, Argentine scientist; received the Nobel Prize in Physiology or Medicine (d. 2002)
- October 10 – Dana Elcar, American actor and director (d. 2005)
- October 11 – Princess Joséphine Charlotte of Belgium, Grand Duchess of Luxembourg (d. 2005)
- October 13
- Lee Konitz, American jazz composer and alto saxophonist
- Turgut Özal, 8th President and 26th Prime Minister of Turkey (d. 1993)
- October 14
- October 15 – Peter Pollen, Canadian politician (d. 2017)
- October 16 – Günter Grass, German writer, Nobel Prize laureate (d. 2015)
- October 18 – George C. Scott, American actor (d. 1999)
- October 19 – Pierre Alechinsky, Belgian painter
- October 22 – Oscar Furlong, Argentine basketball player, and tennis player and coach (d. 2018)
- October 23 – Leszek Kołakowski, Polish philosopher (d. 2009)
- October 24
- October 25
- October 27
- October 28 – Roza Makagonova, Russian actress (d. 1995)
- October 29 – William Cousins, American judge (d. 2018)
- December 2 – Prabhakar Thokal, Indian cartoonist (d. 1999)
- December 3
- December 4 – Rafael Sánchez Ferlosio, Spanish writer
- December 5
- December 6 – Marcel Pelletier, Canadian ice hockey player (d. 2017)
- December 7 – Helen Watts, Welsh contralto (d. 2009)
- December 8 – Vladimir Shatalov, Russian cosmonaut
- December 9 – Pierre Henry, French composer (d. 2017)
- December 10 – Bob Farrell, American motivational speaker, author, and founder of Farrell's Ice Cream Parlour and Restaurant (d. 2015)
- December 11 – Stein Eriksen, Norwegian Olympic skier (d. 2015)
- December 12 – Robert Noyce, Intel cofounder (d. 1990)
- December 13 – James Wright, American poet (d. 1980)
- December 16 – Akihiko Hirata, Japanese actor (d. 1984)
- December 17 – Richard Long, American actor (d. 1974)
- December 18
- December 20
- December 23 – Alexander Vedernikov, Russian singer and teacher (d. 2018)
- December 24 – Mary Higgins Clark, American novelist
- December 25
- December 26
- December 27
- December 28 – Edward Babiuch, Polish Communist political figure
- December 29
- December 30
- December 31 – NOF4, Italian painter and graffiti artist (d. 1994)
- ^ Utsu, T. R. (2002), "A List of Deadly Earthquakes in the World: 1500–2000", International Handbook of Earthquake & Engineering Seismology, Part A, Volume 81A (First ed.), Academic Press, p. 704, ISBN 978-0124406520
- ^ "U.S. and British Warships Shell Cantonese Army". Miami Daily News. 1927-03-24. p. 1.
- ^ "Sunbeam land speed engine restored". BBC News.
- ^ Bryson, Bill (1 October 2013). One Summer: America, 1927. Knopf Doubleday Publishing Group. ISBN 978-0-385-53782-7.
- ^ http://www.erh.noaa.gov/btv/events/27flood.shtml
- Charles J. Shindo. 1927 and the Rise of Modern America (University Press of Kansas; 244 pages; 2010).