Map settings

Month	Date	Location	Category	Event

Month	Date	Location	Category	Event
January	n/a	Washington, D.C.	Health, Science, & Education	E. W. Scripps and William Emerson Ritter found Science Service, later renamed Society for Science & the Public, in the United States, with the goal of keeping the public informed of scientific developments.
January	2	Belo Horizonte, Brazil	Sports	The Association football club Cruzeiro Esporte Clube, from Belo Horizonte, is founded as the multi-sports club Palestra Italia by Italian expatriates in Brazil.
January	2	Pittsburgh	American Culture and Politics	The first religious radio broadcast is heard over station KDKA in Pittsburgh.
January	2	Villa Garcia, Mexico	Natural and Man-Made Disasters	The Spanish liner Santa Isabel breaks in two and sinks off Villa Garcia, Mexico, with the loss of 244 of the 300 people on board.
January	15	Japan	World Culture	Mitsubishi Electric, the future multinational electronics business, is separated from the Mitsubishi Heavy Industries shipyard in Japan.
January	16	Ľubochňa	International Politics	The Marxist Left in Slovakia and the Transcarpathian Ukraine holds its founding congress in Ľubochňa.
January	20	English Channel	Natural and Man-Made Disasters	British K-class submarine HMS K5 sinks in the English Channel; all 57 on board are lost.
January	21	Livorno	International Politics	The Italian Communist Party is founded in Livorno.
January	21	Carnegie Hall in New York City	American Culture and Politics	The full-length silent comedy-drama film The Kid, written, produced, directed by and starring Charlie Chaplin (in his Tramp character), with Jackie Coogan, is released in the United States.
January	25	Taranto Harbour	Post-WWI	The Italian battleship Leonardo da Vinci is righted in Taranto Harbour.
January	26	Sweden	International Politics	Women's suffrage is attained in Sweden.
February	12	Georgia	Other Wars, Revolutions, Riots, & Strikes	Red Army invasion of Georgia: The Democratic Republic of Georgia is invaded by forces of Bolshevist Russia.
February	20	Czechoslovakia	International Politics	The Young Communist League of Czechoslovakia is founded.
February	21	Iran	Other Wars, Revolutions, Riots, & Strikes	1921 Persian coup d'état: Rezā Khan and Zia'eddin Tabatabaee stage a coup d'état in Iran.
February	23	Sweden	International Politics	The moderately conservative public official Oscar von Sydow takes over the Swedish premiership from Baron Louis De Geer the Younger.
February	25	Tbilisi	Other Wars, Revolutions, Riots, & Strikes	Red Army invasion of Georgia: The Red Army enters the Georgian capital Tbilisi and occupies the country, installing a new government and proclaiming the Georgian Soviet Republic.
February	27	Vienna	International Politics	A Socialist congress at Vienna ends, with the International Working Union of Socialist Parties founded.
February	28	Kronstadt, Kotlin Island, Russia	Other Wars, Revolutions, Riots, & Strikes	The Kronstadt rebellion is initiated by sailors of the Soviet Navy's Baltic Fleet.
March	n/a	Western Australia	World Culture	The Group Settlement Scheme in Western Australia begins.
March	1	Gunma Prefecture, Japan	International Politics	The city of Kiryū, located in Gunma Prefecture, Japan, is founded.
March	1	Sydney Cricket Ground, Sydney	Sports	The Australia national cricket team, led by Warwick Armstrong, becomes the first to complete a whitewash in The Ashes, something that will not be repeated for 86 years.
March	4	United States Capitol in Washington, D.C.	American Culture and Politics	Warren G. Harding is sworn in as the 29th President of the United States.
March	5	Clonbanin, County Cork	Other Wars, Revolutions, Riots & Strikes -- Irish War of Independence	Irish War of Independence: Clonbanin ambush: A force of about 100 Irish Republican Army members attacks a British Army convoy of 40 soldiers, killing several, including Brigadier General Cumming.
March	6	Portugual	International Politics	The Portuguese Communist Party is founded.
March	8	Madrid	International Politics	Spanish Premier Eduardo Dato e Iradier is assassinated while exiting the parliament building in Madrid.
March	8	Düsseldorf	Post-WWI	Allied forces occupy Düsseldorf, Ruhrort and Duisburg.
March	12	Turkey	World Culture	The İstiklâl Marşı (Independence March), the Turkish national anthem, is officially adopted.
March	13	Mongolia	Other Wars, Revolutions, Riots, & Strikes	Occupation of Mongolia: The Russian White Army captures Mongolia from China; Roman von Ungern-Sternberg declares himself ruler.
March	14	Charlottenburg, Berlin	International Politics	Armenian Soghomon Tehlirian assassinates Mehmed Talaat, former Interior Minister of Turkey, in Charlottenburg, Berlin.
March	16	Mountjoy Prison, Dublin	Other Wars, Revolutions, Riots, & Strikes	Six Irish Republican Army men of the Forgotten Ten are hanged in Mountjoy Prison, Dublin.
March	17	Kronstadt, Saint Petersburg, Russia	Other Wars, Revolutions, Riots, & Strikes	The Red Army crushes the Kronstadt rebellion, and a number of sailors flee to Finland.
March	17	London, UK	Health, Science, & Education	Dr. Marie Stopes opens the first birth control clinic in the British Empire in London, UK.
March	17	Poland	International Politics	The Second Polish Republic adopts the March Constitution.
March	18	Riga	International Politics	The second Peace of Riga ends the Polish–Soviet War. A permanent border is established between the Polish and Soviet states.
March	20	Upper Silesia	International Politics	Upper Silesia votes for re-annexation to Germany.
March	21	Soviet Russia	International Politics	The New Economic Policy starts in Soviet Russia.
March	21	Headford Junction railway station, County Kerry, Ireland	Other Wars, Revolutions, Riots & Strikes -- Irish War of Independence	Irish War of Independence – Headford Ambush: The Irish Republican Army kills at least 9 British Army troops.
March	24	Monte Carlo	Sports	The 1921 Women's Olympiad (the first international women's sports event) begins in Monte Carlo.
March	31	Abkhazian SSR	International Politics	Abkhazia becomes a republic Abkhazian SSR.
March	31	Britain	Other Wars, Revolutions, Riots, & Strikes	The British government formally returns the coal mines from wartime control to their private owners, who demand wage cuts; in response, the Miners' Federation of Great Britain calls on its partner trade unions in the Triple Alliance to join it in strike action, leading in turn to the government declaring a state of emergency for the first time under the Emergency Powers Act 1920. On April 1, a lockout of striking coal miners begins.
April	n/a	New York City	American Culture and Politics	The United States Figure Skating Association is formed.
April	11	Jordan	International Politics	The Emirate of Transjordan is created, with Abdullah I as emir.
April	15	Britain	Other Wars, Revolutions, Riots, & Strikes	Black Friday in Britain: transport union members of the 'Triple Alliance' refuse to support national strike action by coal miners.
April	20	New York City	American Culture and Politics	Ferenc Molnár's play Liliom is first produced in English on Broadway. The play would later be adapted as the musical Carousel.
April	27	Britain	Post-WWI	The Allied reparations commission announces that Germany has to pay 132 billion gold marks ($33 trillion), in annual installments of 2.5 billion.
May	1	Jaffa, Mandatory Palestine	Other Wars, Revolutions, Riots, & Strikes	Jaffa riots: Riots through the 7th, at Jaffa, Mandatory Palestine result in 47 Jewish and 48 Arab deaths.
May	2	Upper Silesia	Other Wars, Revolutions, Riots, & Strikes	Third Silesian Uprising: Poles in Upper Silesia rise against the Germans through July 5th.
May	3	Northern Ireland	International Politics	The province of Northern Ireland is created within the United Kingdom.
May	5	London	Post-WWI	London Schedule of Payments sets out the German Weimar Republic's obligation to pay World War I reparations.
May	5	England	Sports	Only 13 paying spectators attend the football match between Leicester City and Stockport County F.C. in England, the lowest attendance in The Football League's history.
May	6	Germany	International Politics	The German-Soviet Provisional Agreement is signed; Germany recognises the Soviet government in the RSFSR.
May	13	Ishikawa Prefecture, Japan	World Culture	Komatsu Ironworks, as predecessor of Komatsu, a worldwide construction machinery and forklift brand, is founded in Ishikawa Prefecture, Japan.
May	14	Grand Central Terminal	Natural and Man-Made Disasters	The major May 1921 geomagnetic storm occurs through the 15th.
May	14	Cairo and Alexandria, Egypt	Other Wars, Revolutions, Riots, & Strikes	Violent anti-European riots occur in Cairo and Alexandria, Egypt through the 17th.
May	16	Czechoslovakia	International Politics	The Communist Party of Czechoslovakia is founded.
May	19	Washington D.C.	American Culture and Politics	The Emergency Quota Act is passed by the United States Congress, establishing national quotas on immigration. Because this drastically limits immigration from Eastern Europe, Jews emigrating from there begin to prefer Palestine as a destination rather than the U.S.
May	22	United States	Sports	In the first golf international between the two countries, the United States beats the United Kingdom 9 rounds to 3.
May	23	Germany	Post-WWI	The Leipzig War Crimes Trials are held in Germany through July 16.
May	24	Northern Ireland	International Politics	1921 Irish elections: In the first Northern Ireland general election for the new Parliament of Northern Ireland, Ulster Unionists win 40 out of 52 seats. The dominant-party system here will last for fifty years.
May	25	The Custom House, Dublin	Other Wars, Revolutions, Riots & Strikes -- Irish War of Independence	Irish War of Independence: The Irish Republican Army occupies and burns The Custom House in Dublin, the centre of local government in Ireland. Five IRA men are killed, and over 80 are captured by the British Army which surrounds the building.
May	26	Norway	Other Wars, Revolutions, Riots, & Strikes	A general strike begins in Norway.
May	31	Greenwood District, Tulsa, Oklahoma	Natural and Man-Made Disasters	Tulsa Race Massacre (Greenwood Massacre): Mobs of white residents attack black residents and businesses in Greenwood District, Tulsa, Oklahoma. The official death toll is 36, but later investigations suggest an actual figure between 100 and 300 through June 1. 1,250 homes are destroyed and roughly 6,000 African Americans imprisoned in one of the worst incidents of mass racial violence in the United States.
June	3	Sweden	International Politics	The death penalty is abolished in Sweden.
June	15	Paris, France	World Culture	29-year-old Bessie Coleman gets her pilot's licence and becomes the first African American to earn an international pilot's licence.
June	21	Principality of Monaco	International Politics	The International Hydrographic Bureau (IHB) is established as an agency of the League of Nations; it continues in this form until April 19, 1946.
June	27	Fort Providence	International Politics	The first signings of Treaty 11, an agreement between George V, King of Canada, and various Canadian First Nations, are conducted at Fort Providence.
June	28	Yugoslavia	International Politics	The Constitutional Assembly of the Kingdom of Serbs, Croats and Slovenes passes the Vidovdan Constitution, despite a boycott of the vote by the communists, and Croat and Slovene parties.
June	28	United Kingdom	Other Wars, Revolutions, Riots, & Strikes	The coal strike in the United Kingdom ends with the Miners' Federation of Great Britain obliged to accept pay cuts.
July	1	China	International Politics	The Communist Party of China (CPC) is founded.
July	1	Paris, France	Health, Science, & Education	The first BCG vaccination against tuberculosis is given, in Paris, France. The recipient is a newborn child.
July	2	Frelinghuysen estate in Raritan, New Jersey	Post-WWI	U.S. President Warren Harding signs a joint congressional resolution, declaring an end to America's state of war with Germany, Austria and Hungary.
July	4	Italy	International Politics	A new conservative government is formed in Italy, by Ivanoe Bonomi.
July	11	Ireland	Other Wars, Revolutions, Riots & Strikes -- Irish War of Independence	The Irish War of Independence (aka the Anglo-Irish War) comes to a halt, after a truce is signed between the belligerents.
July	11	Mongolia	Other Wars, Revolutions, Riots, & Strikes	The Red Army captures Mongolia from the White Army, and establishes the Mongolian People's Republic.
July	14	Massachusetts	American Culture and Politics	A Massachusetts jury finds Nicola Sacco and Bartolomeo Vanzetti guilty of first degree murder following a widely publicized trial.
July	17	Mirdita	International Politics	The Republic of Mirdita is proclaimed near the Albanian-Serbian border, with Yugoslav support.
July	21	Annual, Morocco	Other Wars, Revolutions, Riots, & Strikes	Rif War – Battle of Annual: Spanish troops are dealt a crushing defeat, at the hands of Abd el-Krim.
July	21	Colombo	World Culture	Edward Harper, the "father of broadcasting" in Ceylon, arrives in Colombo to take up his post as Chief Engineer of the Ceylon Telegraph Department.
July	22	London, England	Other Wars, Revolutions, Riots & Strikes -- Irish War of Independence	The Anglo-Irish truce, agreed 10 days earlier, is officially declared in London.
July	23	China	International Politics	The Communist Party of China (CPC) launches the first founding National Congress.
July	26	Washington D.C.	American Culture and Politics	U.S. President Warren G. Harding receives Princess Fatima of Afghanistan, and Stanley Clifford Weyman.
July	27	University of Toronto	Health, Science, & Education	Researchers at the University of Toronto, led by biochemist Frederick Banting, announce the discovery of the hormone insulin.
July	29	Germany	International Politics	Adolf Hitler becomes Führer of the Nazi Party.
August	5	Pittsburgh	Sports	The first radio baseball game is broadcast; Harold Arlin announces the Pirates-Phillies game from Forbes Field, over Westinghouse KDKA, in Pittsburgh.
August	11	Breslau	Health, Science, & Education	The temperature reaches 39 degrees Celsius in Breslau; the heat wave continues elsewhere in Europe as well.
August	23	Baghdad	International Politics	King Faisal I of Iraq is crowned in Baghdad.
August	24	Kingston upon Hull, England	Natural and Man-Made Disasters	R38-class airship ZR-2 explodes on her fourth test flight near Kingston upon Hull, England, killing 44 of the 49 Anglo-American crew on board.
August	25	Campobello	American Culture and Politics	Franklin Roosevelt, 39, is diagnosed with poliomyelitis, following a two-week illness characterized by paralysis and fevers; he becomes permanently disabled after this illness.
August	25	Logan County, West Virginia	Other Wars, Revolutions, Riots, & Strikes	The Battle of Blair Mountain, the largest labor uprising in United States history and the country's largest peacetime armed uprising, begins in Logan County, West Virginia as part of the Coal Wars, continuing until September 2.
August	26	Munich	Other Wars, Revolutions, Riots, & Strikes	Rising prices cause major riots in Munich.
August	26	Germany	International Politics	Following the assassination of former Finance Minister Matthias Erzberger by right-wing terrorists, the German government declares martial law.
September	1	Poplar, London	Other Wars, Revolutions, Riots, & Strikes	Poplar Rates Rebellion: Nine members of the borough council of Poplar, London, are arrested.
September	7	Atlantic City, New Jersey	American Culture and Politics	In Atlantic City, New Jersey, the first Miss America Pageant is held.
September	8	Atlantic City Boardwalk	American Culture and Politics	Margaret Gorman, 16, wins the Atlantic City Pageant's Golden Mermaid trophy; pageant officials later dub her the first Miss America.
September	13	Wichita, Kansas	American Culture and Politics	White Castle hamburger restaurant opens in Wichita, Kansas, the foundation of the world's first fast food chain.
September	21	Oppau, Germany	Natural and Man-Made Disasters	The Oppau explosion occurs at BASF's nitrate factory in Oppau, Germany; 500–600 are killed.
September	28	Meschede, Germany	International Politics	Sauerländer Heimatbund is founded in Meschede, Germany.
October	5	Newark, New Jersey	Sports	The World Series game is first broadcast on the radio, by Newark, New Jersey station WJZ, Pittsburgh station KDKA, and a group of other commercial and amateur stations throughout the eastern United States.
October	8	Cleveland, Ohio	American Culture and Politics	The first Sweetest Day is staged in Cleveland, Ohio.
October	10	University of Szeged	Health, Science, & Education	Teaching at the University of Szeged begins, in the Kingdom of Hungary.
October	10	Kars, Turkey	Post-WWI	The Treaty of Kars is signed between the Grand National Assembly of Turkey and the Soviet Socialist Republics of Armenia, Azerbaijan and Georgia, establishing the boundaries between Turkey and the states of the south Caucasus.
October	13	Sweden	International Politics	Swedish Social Democratic party leader Hjalmar Branting becomes yet again Prime Minister, after strong general election gains for his party.
October	19	Lisbon	Other Wars, Revolutions, Riots, & Strikes	Bloody Night' (Noite Sangrenta): A massacre in Lisbon claims the lives of Portuguese Prime-Minister António Granjo and other politicians.
October	21	London, England	Other Wars, Revolutions, Riots & Strikes -- Irish War of Independence	A peace conference between Ireland and the United Kingdom begins in London.
October	21	Los Angeles	American Culture and Politics	George Melford's wildly successful silent film The Sheik, which will propel its leading actor Rudolph Valentino to international stardom, premieres in Los Angeles.
October	24	Morocco	Other Wars, Revolutions, Riots, & Strikes	The Spanish Army defeats rifkabyl rebels in Morocco.
October	29	Link River Dam, Oregon	American Culture and Politics	Construction of the Link River Dam, a part of the Klamath Project in Oregon, is completed.
October	29	Centre College	Sports	Centre College's American football team, led by quarterback Bo McMillin, defeats Harvard University 6–0, to break Harvard's five-year winning streak. For decades afterward, this is called "football's upset of the century."
November	4	Munich, Germany	International Politics	After a speech by Adolf Hitler in the Hofbräuhaus in Munich (Germany), members of the Sturmabteilung ("brownshirts") physically assault his opposition.
November	9	Italy	International Politics	The National Fascist Party (Partito Nazionale Fascista or PNF) is founded in Italy.
November	9	Reykjavík	Other Wars, Revolutions, Riots, & Strikes	Riots in Reykjavík injure most of the small police force.
November	11	Arlington National Cemetery	American Culture and Politics	During an Armistice Day ceremony at Arlington National Cemetery, the Tomb of the Unknowns is dedicated by Warren G. Harding, President of the United States.
November	14	Spain	International Politics	The Spanish Communist Party is founded.
November	23	Washington D.C.	American Culture and Politics	In the United States, the Sheppard–Towner Act is signed by President Harding, providing federal funding for maternity and child care.
November	n/a	Germany	Post-WWI	Hyperinflation is rampant in Germany, where 263 marks are now needed to buy a single American dollar, more than 20 times greater than the 12 marks needed in April 1919.
December	1	Vienna	Other Wars, Revolutions, Riots, & Strikes	Rising prices cause riots in Vienna.
December	6	London, England	Other Wars, Revolutions, Riots & Strikes -- Irish War of Independence	The Anglo-Irish Treaty establishing the Irish Free State, an independent nation incorporating 26 of Ireland's 32 counties, is signed in London.
December	6	Canada	International Politics	Agnes Macphail becomes the first woman to be elected to the Canadian Parliament.
December	13	Washington Naval Conference	International Politics	In the Four-Power Treaty on Insular Possessions, Japan, the United States, United Kingdom, and France agree to recognize the status quo in the Pacific.
December	23	Santiniketan, Bengal, India	Health, Science, & Education	Visva-Bharati College is founded by Rabindranath Tagore in Santiniketan, Bengal Presidency, British India.
December	29	Canada	International Politics	William Lyon Mackenzie King becomes Canada's tenth prime minister.
March	n/a	Russia	Natural and Man-Made Disasters	Russian famine of 1921–22 begins; roughly 5,000,000 die.
n/a	n/a	Florence, Italy	World Culture	Luxury goods brand Gucci is founded in Florence, Italy.

Major 1921 Events

Map settings