On this day: October 9

Events on October 9

• 1676 Antonie van Leeuwenhoek wrote a letter to the Royal Society describing "animalcules" – the first known description of protozoa. Wikipedia
• 1701 The Collegiate School of Connecticut (later renamed Yale University) is chartered in Old Saybrook, Connecticut. Wikipedia
• 1708 Great Northern War: Russia defeated Sweden at the Battle of Lesnaya on the Russian–Polish border, in present-day Belarus. Wikipedia
• 1740 European soldiers and Javanese collaborators started massacring Chinese Indonesians in the port city of Batavia, modern-day Jakarta: at least 10,000 people were killed. Wikipedia
• 1780 The deadliest Atlantic hurricane on record began to impact the Caribbean, killing at least 20,000 people across the Antilles over the subsequent days. Wikipedia
• 1793 French Revolution: After a month-long siege, the leaders of Lyon surrendered, ending their revolt against the National Convention. Wikipedia
• 1813 Late in the Napoleonic Wars, Empress Marie Louise issued decrees conscripting tens of thousands of French teenagers, who became known as Marie-Louises. Wikipedia
• 1874 The Universal Postal Union, then known as the General Postal Union, was established with the signing of the Treaty of Bern to unify disparate postal services and regulations so that international mail could be exchanged easily. Wikipedia
• 1888 The Washington Monument in Washington, D.C., at the time the world's tallest building, officially opened to the general public. Wikipedia
• 1911 An accidental bomb explosion triggers the Wuchang Uprising against the Qing dynasty, beginning the Xinhai Revolution. Wikipedia
• 1912 Following a reduction in pay, textile workers in Little Falls, New York, walked out of their mill, starting a three-month strike. Wikipedia
• 1913 Carrying a cargo hold full of highly flammable chemicals, the ocean liner SS Volturno caught fire in the north Atlantic and sank, resulting in 136 deaths. Wikipedia
• 1914 World War I: The civilian authorities of Antwerp surrendered and allowed the German army to capture the city. Wikipedia
• 1918 The Finnish Parliament elects Prince Frederick Charles of Hesse as King of Finland, but he never accedes to the throne due to Germany's defeat in World War I. Wikipedia
• 1921 The Mortimer War Memorial, designed by Herbert Maryon in memory of local servicemen who died in the First World War, was dedicated. Wikipedia
• 1936 Boulder Dam (later Hoover Dam) begins to generate electricity and transmit it to Los Angeles. Wikipedia
• 1942 World War II: American forces defeated the Japanese at the Third Battle of the Matanikau in Guadalcanal, Solomon Islands, reversing the Japanese victory a couple of weeks earlier. Wikipedia
• 1952 A footman shot and killed two colleagues and wounded the lady of the house at Knowsley Hall, England. Wikipedia
• 1962 Nick Holonyak, an engineer for General Electric, gave the first public demonstration of a light-emitting diode. Wikipedia
• 1962 Uganda becomes an independent Commonwealth realm. Wikipedia
• 1967 A day after his capture, Ernesto "Che" Guevara is executed for attempting to incite a revolution in Bolivia. Wikipedia
• 1980 Pope John Paul II greets the Dalai Lama during a private audience in Vatican City. Wikipedia
• 1986 The Phantom of the Opera, a musical by Andrew Lloyd Webber and currently the longest-running Broadway show in history, opened in London's West End. Wikipedia
• 2007 The Dow Jones Industrial Average reaches its all-time high of 14,164 points before rapidly declining due to the 2008 financial crisis. Wikipedia
• 2012 Pakistani activist Malala Yousafzai was severely injured by a Taliban gunman in a failed assassination attempt. Wikipedia
• 2019 Syrian civil war: Turkish forces began an offensive into north-eastern Syria following the withdrawal of U.S. troops from the region. Wikipedia

Born on October 9

• 1261 Denis of Portugal (died 1325) Wikipedia
• 1757 Charles X of France (died 1836) Wikipedia
• 1835 Camille Saint-Saëns, French composer and conductor (died 1921) Wikipedia
• 1852 Hermann Emil Fischer, German chemist and academic, Nobel Prize laureate (died 1919) Wikipedia
• 1859 Alfred Dreyfus, French colonel (died 1935) Wikipedia
• 1873 Karl Schwarzschild, German physicist and astronomer (died 1916) Wikipedia
• 1874 Nicholas Roerich, Russian archaeologist and painter (died 1947) Wikipedia
• 1879 Max von Laue, German physicist and academic, Nobel Prize laureate (died 1960) Wikipedia
• 1888 Nikolai Bukharin, Russian journalist and politician (died 1938) Wikipedia
• 1892 Ivo Andrić, Yugoslav novelist, poet, and short story writer, Nobel Prize laureate (died 1975) Wikipedia
• 1906 Léopold Sédar Senghor, Senegalese poet and politician, 1st President of Senegal (died 2001) Wikipedia
• 1907 Jacques Tati, French actor, director, and screenwriter (died 1982) Wikipedia
• 1933 Peter Mansfield, English physicist and academic, Nobel Prize laureate (died 2017) Wikipedia
• 1938 Heinz Fischer, Austrian academic and politician, 11th President of Austria Wikipedia
• 1940 John Lennon, English singer-songwriter, guitarist, and producer (died 1980) Wikipedia
• 1947 France Gall, French singer (died 2018) Wikipedia
• 1950 Jody Williams, American academic and activist, Nobel Prize laureate Wikipedia
• 1959 Boris Nemtsov, Russian academic and politician, First Deputy Prime Minister of Russia (died 2015) Wikipedia
• 1964 Guillermo del Toro, Mexican-American director, producer, and screenwriter Wikipedia
• 1966 David Cameron, English politician, Prime Minister of the United Kingdom Wikipedia
• 1969 PJ Harvey, English musician, singer-songwriter, writer, poet, and composer Wikipedia
• 1996 Bella Hadid, American model Wikipedia

Died on October 9

• 1047 Pope Clement II Wikipedia
• 1924 Valery Bryusov, Russian author, poet, and critic (born 1873) Wikipedia
• 1943 Pieter Zeeman, Dutch physicist and academic, Nobel Prize laureate (born 1865) Wikipedia
• 1958 Pope Pius XII (born 1876) Wikipedia
• 1967 Che Guevara, Argentinian-Cuban physician, politician and guerrilla leader (born 1928) Wikipedia
• 1967 André Maurois, French soldier and author (born 1885) Wikipedia
• 1967 Cyril Norman Hinshelwood, English chemist and academic, Nobel Prize laureate (born 1897) Wikipedia
• 1974 Oskar Schindler, Czech-German businessman (born 1908) Wikipedia
• 1978 Jacques Brel, Belgian singer-songwriter and actor (born 1929) Wikipedia
• 1995 Alec Douglas-Home, British cricketer and politician, Prime Minister of the United Kingdom (born 1903) Wikipedia
• 2004 Jacques Derrida, Algerian-French philosopher and academic (born 1930) Wikipedia
• 2010 Maurice Allais, French economist and physicist, Nobel Prize laureate (born 1911) Wikipedia
• 2015 Richard F. Heck, American chemist and academic, Nobel Prize laureate (born 1931) Wikipedia
• 2016 Andrzej Wajda, Polish film and theatre director (born 1926) Wikipedia

Holidays and observances

• Christian feast day: Abraham Wikipedia
• Christian feast day: Denis of Paris Wikipedia
• Christian feast day: Dionysius the Areopagite Wikipedia
• Christian feast day: Ghislain Wikipedia
• Christian feast day: Gunther of Bohemia Wikipedia
• Christian feast day: Innocencio of Mary Immaculate and Martyrs of Turon Wikipedia
• Christian feast day: John Henry Newman Wikipedia
• Christian feast day: John Leonardi Wikipedia
• Christian feast day: Luis Beltran Wikipedia
• Christian feast day: Robert Grosseteste (Church of England) Wikipedia
• Christian feast day: Wilfred Grenfell (Episcopal Church in the United States) Wikipedia
• Christian feast day: October 9 (Eastern Orthodox liturgics) Wikipedia
• Fire Prevention Day (Canada, United States) Wikipedia
• Hangul Day (South Korea) Wikipedia
• Independence Day, celebrates the independence of Uganda from United Kingdom in 1962. (Uganda) Wikipedia
• Independence of Guayaquil from Spain in 1820 (Ecuador) Wikipedia
• Leif Erikson Day (United States, Iceland and Norway) Wikipedia
• National Day of Commemorating the Holocaust (Romania) Wikipedia
• National Nanotechnology Day (United States) Wikipedia
• Takayama Autumn Festival (Takayama, Japan) Wikipedia
• World Post Day Wikipedia
• Indian Foreign Service Day Wikipedia

Sources

• Wikipedia — “October 9” — events, births, deaths and observances (text under CC BY-SA 4.0) (checked 2026-10-15)
• Wikipedia — “Selected anniversaries/October 9” — the anniversaries editors chose for the date and the article each one is about (checked 2026-10-15)
• Wikidata — in how many language editions each entry's own article exists, used to fill the lists (CC0) (checked 2026-10-15)
• vacanza/holidays (open-source holiday rules, MIT licence) — holiday rules used to build the lists (checked 2026-10-15)

The events, births, deaths and observances above are from the English Wikipedia article “October 9” and the articles it links to (authors and history), retrieved 2026-10-15 through the Wikimedia “On this day” feed. They are licensed under CC BY-SA 4.0; this selection is shared under the same licence. Every anniversary that Wikipedia's editors selected for October 9 stays on the list; the remaining places, up to 26 events, 22 births and 14 deaths, go to the entries whose own article — about the event itself, or else the person or thing it is about — appears in the most language editions (counted from Wikidata); an article about a person or thing, which covers far more than one day, counts half. An entry with no article of its own counts, also at half, by the least covered article it links, and one that links only places counts for nothing. Each list runs by year, and the wording is unchanged apart from removing references to pictures, audio and video.