1871 (MDCCCLXXI) was a common year starting on Sunday of the Gregorian calendar and a common year starting on Friday of the Julian calendar, the 1871st year of the Common Era (CE) and Anno Domini (AD) designations, the 871st year of the 2nd millennium, the 71st year of the 19th century, and the 2nd year of the 1870s decade. As of the start of 1871, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.
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- January 3 – Franco-Prussian War – Battle of Bapaume: Prussians win a strategic victory.
- January 18 – Proclamation of the German Empire: The member states of the North German Confederation and the south German states, aside from Austria, unite into a single nation state, known as the German Empire. The King of Prussia is declared the first German Emperor as Wilhelm I of Germany, in the Hall of Mirrors at the Palace of Versailles. Constitution of the German Confederation comes into effect. It abolishes all restrictions on Jewish marriage, choice of occupation, place of residence, and property ownership, but exclusion from government employment and discrimination in social relations remain in effect.
- January 21 – Giuseppe Garibaldi's group of French and Italian volunteer troops, in support of the French Third Republic, win a battle against the Prussians in Dijon.
- February 8 – 1871 French legislative election elects the first legislature of the French Third Republic; monarchists (Legitimists and Orleanists) favourable to peace with the German Empire gain a large majority. The National Assembly meets in Bordeaux.
- February 9 – The United States Commission on Fish and Fisheries is founded.
- February 21 – The District of Columbia Organic Act of 1871 is signed into law by U.S. President Ulysses S. Grant.
- February 24 – The Danish Women's Society is founded to promote women's rights in Denmark; on December 15 it adopts the style Dansk Kvindesamfund.
- March 3 – The first American civil service reform legislation is signed into law by U.S. President Ulysses S. Grant, creating the United States Civil Service Commission.
- March 7 – José Paranhos, Viscount of Rio Branco, becomes Prime Minister of the Empire of Brazil, serving for four years.
- March 18 – Origin of the Paris Commune: Troops of the regular French Army, sent by Adolphe Thiers, Chef du pouvoir executive de la République française, to seize cannons stored on the hill of Montmartre, fraternise with civilians and the National Guard, and two army generals are killed. Regular troops are evacuated to Versailles.
- March 21
- March 22
- March 26 – The Paris Commune is formally established in France.
- March 27 – The first Rugby Union International results in a 1–0 win, by Scotland over England.
- March 29
- April – The Stockholms Handelsbank is founded.
- April 4 – The New Jersey Detective Agency is chartered, and the New Jersey State Detectives are initiated.
- April 10 – In Brooklyn, New York, P.T. Barnum opens his three-ring circus, hailing it as "The Greatest Show on Earth".
- April 20 – U.S. President Ulysses S. Grant signs the Civil Rights Act of 1871.
- April 24 – Servant girl Jane Clouson is murdered in Eltham, England.
- May 4 – The first supposedly Major League Baseball game is played in America.
- May 8 – The first Major League Baseball home run is hit by Ezra Sutton, of the Cleveland Forest Citys.
- May 10 – The Treaty of Frankfurt is signed, confirming the frontiers between Germany and France. The provinces of Alsace and Lorraine are transferred from France to Germany.
- May 11 – The first trial in the Tichborne case begins, in the London Court of Common Pleas.
- May 21
- May 27 – French government troops massacre 147 Communards from Belleville, at Père-Lachaise Cemetery in Paris.
- May 28 – Paris Commune falls to French government forces.
- June 1 – Bombardment of the Selee River Forts: Koreans attack two United States Navy warships.
- June 10 – United States expedition to Korea: Captain McLane Tilton leads 109 members of the United States Marine Corps in a punitive naval attack on the Han River forts on Ganghwa Island in Korea, resulting in 250 Koreans dying and diplomatic failure to "open up" Korea.
- June 18 – The Universities Tests Act 1871 removes restrictions limiting access to Oxford, Cambridge and Durham universities to members of the Church of England.
- June 29 – Trade unions are legalized in the United Kingdom by the Trade Union Act 1871.
- July 13 – The first cat exhibition is held at the Crystal Palace of London.
- July 20
- July 21–August 26 – The first ever photographs of Yellowstone National Park region are taken by photographer William Henry Jackson, during the Hayden Geological Survey of 1871.
- July 22 – The foundation stone of the first Tay Rail Bridge is laid; the bridge collapses in a storm eight years later.
- July 28 – The Annie becomes the first boat ever launched on Yellowstone Lake, in the Yellowstone National Park region.
- August 7 – Banco de Concepcion, as predecessor of Itau Unibanco, major financial services in South America, founded in Chile.[page needed]
- August 9 – One of the few known major hurricanes to strike what becomes the US state of Hawaii causes significant damage on Hawai'i and Maui.
- August 29 – The abolition of the han system is carried out in Japan.
- August 31 – Adolphe Thiers becomes President of the French Republic.
- September 2 – Whaling Disaster of 1871: The Comet, a brig used by whalers, becomes the first of 33 ships to be crushed in the Arctic ice by an early freeze. Remarkably, all 1,219 people on the abandoned ships are rescued without a single loss of life.
- September 3 – New York City residents, tired of the corruption of the "Tammany Hall" political machine and "Boss" William M. Tweed, its "Grand Sachem", meet to form the 'Committee of Seventy' to reform local politics.
- October 5 – The Società degli Spettroscopisti Italiani (now Società Astronomica Italiana) was established in Rome, the first scientific organisation in the world dedicated to astrophysics.
- October 8 – Four major fires break out on the shores of Lake Michigan in Chicago; Peshtigo, Wisconsin; Holland, Michigan; and Manistee, Michigan. The Great Chicago Fire is the most famous of these, leaving nearly 100,000 people homeless, although the Peshtigo Fire kills as many as 2,500 people, making it the deadliest in United States history.
- October 11 – Heinrich Schliemann begins the excavation of Troy.
- October 12 – The Criminal Tribes Act is enacted by the British Raj in India, naming over 160 communities as "Denotified Tribes", allegedly habitually criminal (it will be repealed in 1949, after Indian independence).
- October 20 – The Royal Regiment of Artillery forms the first regular Canadian army units, when they create two batteries of garrison artillery, which later become the Royal Canadian Artillery.
- October 24 – Chinese massacre of 1871. In Los Angeles' Chinatown, 18 Chinese immigrants are killed by a mob of 500 men.
- October 27
- British forces march into the Klipdrift Republic and annex the territory as Griqualand West Colony.
- Henri, Count of Chambord, refuses to be crowned "King Henry V of France" until France abandons its tricolor, and returns to the old Bourbon flag.
- Boss Tweed of Tammany Hall is arrested for bribery, ending his grip on New York City.
- c. November – The South Improvement Company is formed in Pennsylvania by John D. Rockefeller and a group of major United States railroad interests, in an early effort to organize and control the American petroleum industry.
- November 5 – Wickenburg Massacre: Six men travelling by stagecoach, in the Arizona Territory, are reportedly murdered by Yavapai people.
- November 7 – The London–Australia telegraph cable is brought ashore at Darwin.
- November 10 – Henry Morton Stanley, Welsh-born correspondent for the New York Herald, locates missing Scottish explorer and missionary Dr. David Livingstone in Ujiji, near Lake Tanganyika, and greets him by saying, "Dr. Livingstone, I presume?"
- November 17
- December 10 – German chancellor Otto von Bismarck tries to ban Catholics from the political stage, by introducing harsh laws concerning the separation of church and state.
- December 19 – The city of Birmingham, Alabama, is incorporated with the merger of three existing towns.
- December 24 – The opera Aida opens in Cairo, Egypt.
- December 25 – Reading F.C. is formed as an Association football club in England.
- December 26 – Thespis, the first of the Gilbert and Sullivan operas, premières. It does modestly well, but the two composers will not collaborate again for four years.
- In South Africa
- The Harvard Summer School is founded.
- Continental AG is founded as Continental-Caoutchouc und Gutta-Percha Compagnie in Hanover, Germany on 8th October.
- The Shinto shrine of Izumo-taisha in Japan is designated as an Imperial shrine.
- Modern "neoclassical economics" is initiated by publication of William Stanley Jevons's Theory of Political Economy and Carl Menger's Principles of Economics (Grundsätze der Volkswirtschaftslehre).
- January 1 – Manuel Gondra, Paraguayan author and journalist, 21st President of Paraguay (d. 1927)
- January 7 – Félix Édouard Justin Émile Borel, French mathematician, politician (d. 1956)
- January 9 – Eugène Marais, South African lawyer, naturalist, poet and writer (d. 1936)
- January 17
- January 21 – Nicolae Alevra, Romanian general, politician, and author (d. 1936)
- January 28 – Olga Rudel-Zeynek, Austrian politician (d. 1948)
- January 30 – Wilfred Lucas, Canadian-born actor (d. 1940)
- February 4 – Friedrich Ebert, President of Germany (d. 1925)
- February 9 – Howard Taylor Ricketts, American pathologist (d. 1910)
- February 14 – Florence Roberts, American actress (d. 1927)
- February 15 – John W. Nordstrom, Swedish-born American co-founder of the Nordstrom department store chain (d. 1963)
- February 17 – Florence Anderson, first female trade union secretary in Victoria, Australia (d. 1949)
- February 18 – Harry Brearley, English inventor (d. 1948)
- February 27 – Otto Praeger, American postal official, implements U.S. Airmail (d. 1948)
- February 28 – Manuel Díaz Rodríguez, Venezuelan writer (d. 1927)
- March 1 – Ben Harney, American composer and pianist (d. 1938)
- March 4 – Boris Galerkin, Russian mathematician (d. 1945)
- March 5 – Rosa Luxemburg, German politician (d. 1919)
- March 6 – Afonso Costa, Portuguese lawyer, professor, politician and 3-time Prime Minister of Portugal (d. 1937)
- March 12 – Kitty Marion, German-born actress and women's rights activist in England and the United States (d. 1944)
- March 15 – Constantin Argetoianu, 41st Prime Minister of Romania (d. 1955)
- March 17 – Konstantinos Pallis, Greek general (d. 1941)
- March 19 – Schofield Haigh, English cricketer (d. 1921)
- March 24 – Birdie Blye, American pianist (d. 1935)
- March 27 – Heinrich Mann, German writer (d. 1950)
- March 31 – Arthur Griffith, President of Ireland (d. 1922)
- April 4 – Luke McNamee, American admiral (d. 1952)
- April 8 – Clarence Hudson White, American photographer (d. 1925)
- April 12 – Ioannis Metaxas, Prime Minister of Greece (d. 1941)
- April 13 – Jurgis Matulaitis-Matulevičius, Lithuanian author, Roman Catholic archbishop and blessed (d. 1927)
- April 15 – Jonathan Zenneck, German physicist, electrical engineer (1959)
- May 2 – Francis P. Duffy, Canadian-born American Catholic priest (d. 1932)
- May 3 – Walter Robinson Parr, English-born American Congregational pastor (d. 1922)
- May 6
- May 7 – Gyula Károlyi, 29th Prime Minister of Hungary (d. 1947)
- May 15 – Kōzō Satō, Japanese admiral (d. 1948)
- May 27 – Georges Rouault, French painter, graphic artist (d. 1958)
- June 11 – Walter Cowan, British admiral (d. 1956)
- June 12 – Ernst Stromer, German paleontologist (d. 1952)
- June 14 – Jacob Ellehammer, Danish inventor (d. 1946)
- June 17 – James Weldon Johnson, American author, politician, diplomat, critic, journalist, poet, anthologist, educator, lawyer, songwriter and early civil rights activist (d. 1938)
- June 18 – Edmund Breese, American actor (d. 1936)
- June 21 – DeWitt Jennings, American actor (d. 1937)
- June 23 – Jantina Tammes, Dutch plant biologist (d. 1947)
- June 26 – Reginald R. Belknap, United States Navy rear admiral (d. 1959)
- July 5 – Claus Schilling, German medical researcher and war criminal (d. 1946)
- July 6 – Evelyn Selbie, American actress (d. 1950)
- July 7 – Richard Carle, American actor (d. 1941)
- July 10 – Marcel Proust, French writer (d. 1922)
- July 17 – Lyonel Feininger, German painter (d. 1956)
- July 18 – Sada Yacco, Japanese stage actress (d. 1946)
- July 25 – Richard Ernest Turner, Canadian soldier (d. 1961)
- August 1 – John Lester, American cricketer (d. 1969)
- August 3 – Augusta Holtz, Polish-American supercentenarian, last surviving person born in 1871 (d. 1986)
- August 10 – Aino Sibelius, wife of Finnish composer Jean Sibelius (d. 1969)
- August 12 – Gustavs Zemgals, 2nd President of Latvia (d. 1939)
- August 13 – Karl Liebknecht, German politician (d. 1919)
- August 14 – Aisin Gioro Zaitian, Guangxu Emperor of China (d. 1908)
- August 19
- August 23 – Sofia Panina, Russian politician (d. 1956)
- August 25
- August 27 – Theodore Dreiser, American writer (d. 1945)
- August 29 – Albert François Lebrun, French politician (d. 1950)
- August 30 – Ernest Rutherford, New Zealand physicist, recipient of the Nobel Prize in Chemistry (d. 1937)
- September 1 – J. Reuben Clark, Under Secretary of State for U.S. President Calvin Coolidge (d. 1961)
- September 10
- September 17 – Eivind Astrup, Norwegian Arctic explorer (d. 1895)
- September 19 – Frederick Ruple, Swiss-born American portrait painter (d. 1938)
- September 24 – Lottie Dod, English athlete (d. 1960)
- September 26 – Winsor McCay, American cartoonist, animator (d. 1934)
- September 27 – Grazia Deledda, Italian writer, Nobel Prize laureate (d. 1936)
- September 28 – Pietro Badoglio, Italian field marshal, prime minister (d. 1956)
- October 2
- October 19 – Walter Bradford Cannon, American physiologist (d. 1945)
- October 11
- October 17 – Dénes Berinkey, 21st Prime Minister of Hungary (d. 1944)
- October 25 – John Gough, British general, Victoria Cross recipient (d. 1915)
- October 30
- November 1 – Stephen Crane, American writer (d. 1900)
- November 3 – Albert Goldthorpe, English rugby league footballer (d. 1943)
- November 23 – William Watt, Australian politician, Premier of Victoria (d. 1946)
- December 9 – Joe Kelley, American Baseball Hall of Famer (d. 1943)
- December 13 – Emily Carr, Canadian artist (d. 1945)
- December 17 – Virginia Fábregas, Mexican actress (d. November 17, 1950)
- January 8 – José Trinidad Cabañas, Honduran general, president and national hero (b. 1805)
- January 13 – Kawakami Gensai, Japanese swordsman of the Bakumatsu period (b. 1834)
- January 15 – Edward C. Delavan, American temperance movement leader (b. 1793)
- January 19 – Sir William Denison, Governor of New South Wales (b. 1804)
- January 25 – Jeanne Villepreux-Power, French marine biologist (b. 1794)
- January 29 – Samuel Harvey Taylor, 6th Principal of Phillips Academy, Andover, Massachusetts (b. 1807)
- February 10 – Étienne Constantin de Gerlache, 1st Prime Minister of Belgium (b. 1785)
- February 12 – Alice Cary, American poet, sister of Phoebe Cary (b. 1820)
- February 20 – Paul Kane, Irish-born painter (b. 1810)
- February 22 – Sir Charles Shaw, British army officer and police commissioner (b. 1795)
- February 23 – Amanda Cajander, Finnish medical reformer (d. 1827)
- March – Emma Fürstenhoff, Swedish florist (b. 1802)
- March 18 – Augustus De Morgan, English professor of mathematics, mathematician (b. 1806)
- April 7
- April 7 – Wilhelm von Tegetthoff, Austrian admiral (b. 1827)
- April 30 – Jane Clouson, teenaged British murder victim (b. 1854)
- May 11 – John Herschel, English astronomer (b. 1792)
- May 12 – Elzéar-Henri Juchereau Duchesnay, Canadian politician (b. 1809)
- May 18 – Constance Trotti, Belgian salonnière, culture patron (b. 1800)
- May 23 – Jarosław Dąbrowski, Polish general (b. 1836)
- June 9 – Anna Atkins, British botanist (b. 1799)
- July 5 – Cristina Trivulzio Belgiojoso, Italian noble, patriot, writer and journalist (b. 1808)
- July 6 – Castro Alves, Brazilian poet and playwright (b. 1847)
- July 15 – Tad Lincoln, youngest son of American President Abraham Lincoln (b. 1853)
- July 31 – Phoebe Cary, American poet, sister to Alice Cary (b. 1824)
- August 9 – John Paterson, politician in the New South Wales Legislative Assembly (b. 1831)
- September 16 – Jan Erazim Vocel, Czech poet, archaeologist, historian and cultural revivalist (b. 1803)
- September 20 – John Patteson, Anglican bishop, missionary (martyred) (b. 1827)
- September 21 – Charlotte Elliott, English hymnwriter (b. 1789)
- September 23 – Louis-Joseph Papineau, Canadian politician (b. 1786)
- October 4 – Sarel Cilliers, Voortrekker leader, preacher (b. 1801)
- October 7 – Sir John Burgoyne, British field marshal (b. 1782)
- October 16 – Martha Hooper Blackler Kalopothakes, American missionary, journalist, translator (b. 1830)
- October 18 – Charles Babbage, English mathematician, inventor (b. 1791)
- October 29 – Andrea Debono, Maltese trader and explorer (b. 1821)
- November 2 – Athalia Schwartz, Danish writer, journalist and educator (b. 1821)
- November 22 – Oscar James Dunn, Lieutenant Governor of Louisiana (b. 1825)
- December 21 – Luise Aston, German author, feminist (b. 1814)
- December 28 – John Henry Pratt, English clergyman, mathematician (b. 1809)
- "Vores historie". København: Dansk Kvindesamfund. Retrieved January 20, 2020.
- "Civil Service Commission", in Landmark Legislation, 1774–2002: Major U.S. Acts and Treaties, ed. by Stephen W. Stathis (Congressional Quarterly Press, 2003) p107
- BBC History, July 2011, p12
- Businger, Steven; Nogelmeier, M. Puakea; Chinn, Pauline W. U.; Schroeder, Thomas (February 1, 2018). "Hurricane with a History: Hawaiian Newspapers Illuminate an 1871 Storm". Bulletin of the American Meteorological Society. 99 (1): 137–147. Bibcode:2018BAMS...99..137B. doi:10.1175/BAMS-D-16-0333.1. S2CID 52996353.
- Joesting, Edward (1988). Kauai: The Separate Kingdom. University of Hawaii Press. p. 171.
- Taliaferro, John (2007). In a Far Country: The True Story of a Mission, a Marriage, a Murder, and the Remarkable Reindeer Rescue of 1898. PublicAffairs. p. 179.
- Snay, Mitchell (2011). Horace Greeley and the Politics of Reform in Nineteenth-Century America. Rowman & Littlefield. p. 172.
- Schliemann, Heinrich (1881). Ilios. New York: Harper. p. 21. Retrieved January 20, 2020.
- "1871 Java – Port Darwin Cable". History of the Atlantic Cable & Undersea Communications. November 5, 2014. Archived from the original on January 5, 2015. Retrieved January 3, 2015.
- Stanley, Henry Morton (1872). How I Found Livingstone - Travels, Adventures, and Discoveries in Central Africa; Including Four Months' Residence with Dr. Livingstone (1984 ed.). Crown Buildings, 188 Fleet Street, London: Sampson Low, Marston, Low, and Searle. p. 412. ISBN 9780705415132.CS1 maint: location (link)
- Ponsonby-Fane, Richard (1959). The Imperial House of Japan. p. 125.
- "Virginia Fábregas". Rotonda de las Personas Ilustres. Archived from the original on 14 July 2014. Retrieved 13 June 2014.
- "Hautausmaita". Hautausmaita (in Finnish). Retrieved May 24, 2021.
- "Prominent Sengleans". Senglea Local Council. Archived from the original on February 16, 2020.
- Appleton's Annual Cyclopedia...for 1871 (1873), comprehensive collection of facts online edition