American climate activist Wynn Bruce set himself on fire outside the United States Supreme Court Building in an apparent protest against the climate crisis.
The Paris Agreement, an international treaty on climate change, opened for signature and was signed by 175 parties.
The Royal Canadian Mounted Police arrested two men who were plotting to commit terrorist attacks against Via Rail operations.
Flammable cargo exploded at a railway station in Ryongchon, North Korea, killing at least 54 people and injuring more than a thousand others.
In a pre-dawn raid, U.S. federal agents seized six-year-old Elián González from his relatives' home in Miami and returned him to his Cuban father.
Stephen Lawrence, a black British teenager, was murdered while waiting for a bus in Eltham, London, leading to cultural changes of attitudes on racism and the police, and to the law and police practice.
Korean War: The Chinese People's Volunteer Army attacked positions occupied mainly by Australian and Canadian forces, starting the Battle of Kapyong.
Civil War in Mandatory Palestine: The Jewish paramilitary group Haganah captured Haifa from the Arab Liberation Army.
About 600 prisoners of the Jasenovac concentration camp in the Independent State of Croatia revolted, but only 80 managed to escape while the remainder were killed by the Ustaše regime.
The short-lived Transcaucasian Democratic Federative Republic was established on territory formerly part of the Russian Empire.
The first meeting of the Colonial Defence Committee, a standing committee of the British Colonial Office, was held to discuss the defence of Barbados.
The U.S. Congress authorized the creation of a two-cent coin (pictured), the first U.S. currency to bear the phrase "In God We Trust".
Henry VIII became King of England, following the death of his father Henry VII, eventually becoming a significant figure in the history of the English monarchy.
A fleet commanded by Pedro Álvares Cabral (pictured) anchored off present-day Brazil; he later claimed the land for the Portuguese Empire.
At least 26 people are killed in a terrorist attack on a group of tourists in Pahalgam, Jammu and Kashmir. The Resistance Front (TRF), an offshot of the terrorist group Lashkar-e-Taiba claimed responsibility for the attack.
Four police officers are killed after being struck by a truck on the Eastern Freeway in Melbourne while speaking to a speeding driver, marking the largest loss of police lives in Victoria Police history.
The Paris Agreement is signed, an agreement to help fight global warming.
Japan's Prime Minister Junichiro Koizumi apologizes for Japan's war record.
Eighteen-year-old Stephen Lawrence is murdered in a racially motivated attack while waiting for a bus in Well Hall, Eltham.
A series of gas explosions rip through the streets in Guadalajara, Mexico, killing 206.
Optical fiber is first used to carry live telephone traffic.
Pan Am Flight 812 crashes on approach to Ngurah Rai International Airport in Denpasar, Bali, Indonesia, killing all 107 people on board.
The first Earth Day is celebrated.
Chicano residents in San Diego, California occupy a site under the Coronado Bridge, leading to the creation of Chicano Park.
British yachtsman Sir Robin Knox-Johnston wins the Sunday Times Golden Globe Race and completes the first solo non-stop circumnavigation of the world.
The formation of the Communist Party of India (Marxist–Leninist) is announced at a mass rally in Calcutta.
American Flyers Airline Flight 280/D crashes on approach to Ardmore Municipal Airport in Ardmore, Oklahoma, killing 83.
Red Scare: Witnesses begin testifying and live television coverage of the Army–McCarthy hearings begins.
Korean War: The Chinese People's Volunteer Army begin assaulting positions defended by the Royal Australian Regiment and the Princess Patricia's Canadian Light Infantry at the Battle of Kapyong.
Arab–Israeli War: The port city of Haifa is captured by Jewish forces.
World War II: Prisoners at the Jasenovac concentration camp revolt. Five hundred twenty are killed and around eighty escape.
World War II: Sachsenhausen concentration camp is liberated by soldiers of the Red Army and Polish First Army.
The 1st Air Commando Group using Sikorsky R-4 helicopters stage the first use of helicopters in combat with combat search and rescue operations in the China Burma India Theater.
World War II: Operation Persecution is initiated: Allied forces land in the Hollandia (currently known as Jayapura) area of New Guinea.
World War II: In Greenland, the Allied Sledge Patrol attack the German Bassgeiger weather station.
The United Kingdom, Japan and the United States sign the London Naval Treaty regulating submarine warfare and limiting shipbuilding.
World War I: The use of poison gas in World War I escalates when chlorine gas is released as a chemical weapon in the Second Battle of Ypres.
The 1906 Intercalated Games open in Athens.
Spanish–American War: President William McKinley calls for 125,000 volunteers to join the National Guard and fight in Cuba, while Congress more than doubles regular Army forces to 65,000.
At noon, thousands rush to claim land in the Land Rush of 1889. Within hours the cities of Oklahoma City and Guthrie are formed with populations of at least 10,000.
The first National League baseball game is played at the Jefferson Street Grounds in Philadelphia.
The U.S. Congress passes the Coinage Act of 1864 that permitted the inscription In God We Trust be placed on all coins minted as United States currency.
Texas Revolution: A day after the Battle of San Jacinto, forces under Texas General Sam Houston identify Mexican General Antonio López de Santa Anna among the captives of the battle when some of his fellow soldiers mistakenly give away his identity.
The second day of the Battle of Eckmühl: The Austrian army is defeated by the First French Empire army led by Napoleon and driven over the Danube in Regensburg.
Treaty of Zaragoza divides the eastern hemisphere between Spain and Portugal along a line 297.5 leagues (1,250 kilometres (780 mi)) east of the Moluccas.
Spanish conquistador Hernán Cortés establishes a settlement at Veracruz, Mexico.
Portuguese navigator Pedro Álvares Cabral lands in Brazil (discovery of Brazil).
Violet McGraw, American actress
Danni Wyatt, English cricketer
Machine Gun Kelly, American rapper, singer, songwriter, actor
Kevin Kiermaier, American baseball player
Eve Muirhead, Scottish curler
Dee Strange-Gordon, American baseball player
David Luiz, Brazilian footballer
Amber Heard, American actress
Marshawn Lynch, American football player
Sam W. Heads, English-American entomologist and palaeontologist
Shkëlzen Shala, Albanian entrepreneur and veganism activist
Kaká, Brazilian footballer
Quincy Timberlake, Kenyan-Australian activist, engineer, and politician
Zoltán Gera, Hungarian international footballer and manager
Daniel Johns, Australian singer-songwriter and guitarist
Paul Malakwen Kosgei, Kenyan runner and coach
Dan Cloutier, Canadian ice hockey player and coach
Regine Velasquez, Filipino singer and actress
David J. C. MacKay, English physicist, engineer, and academic (died 2016)
Sherri Shepherd, American actress, comedian, and television personality
Mickey Morandini, American baseball player and manager
Jeffrey Dean Morgan, American actor
Rosalind Gill, English sociologist and academic
Sean Lock, English comedian and actor (died 2021)
Jeff Minter, British video game designer and programmer
Danièle Sauvageau, Canadian ice hockey player and coach
Jeff Hostetler, American football player
Alo Mattiisen, Estonian composer (died 1996)
Mart Laar, Estonian historian and politician, 9th Prime Minister of Estonia
Terry Francona, American baseball player and manager
Ryan Stiles, American-Canadian actor and comedian
Donald Tusk, Polish journalist and politician, 14th Prime Minister of Poland
Marilyn Chambers, American actress
Aivars Kalējs, Latvian organist, composer, and pianist
Ana María Shua, Argentinian author and poet
Peter Frampton, English singer-songwriter, guitarist, and producer
Jancis Robinson, English journalist and critic
Spencer Haywood, American basketball player
John Pritchard, English bishop
Steven L. Bennett, American captain and pilot, Medal of Honor recipient (died 1972)
Paul Davies, English physicist and author
Louise Harel, Canadian lawyer and politician
Archy Kirkwood, Baron Kirkwood of Kirkhope, Scottish lawyer and politician
Nicholas Stern, Baron Stern of Brentford, English economist and academic
John Waters, American actor, director, producer, and screenwriter
Eddy Baldewijns, Belgian politician
Gopalkrishna Gandhi, Indian civil servant and politician, 22nd Governor of West Bengal
Demetrio Stratos, Greek-Egyptian singer-songwriter (died 1979)
Steve Fossett, American businessman, pilot, and sailor (died 2007)
Doug Jarrett, Canadian ice hockey player (died 2014)
Joshua Rifkin, American conductor and musicologist
Keith Crisco, American businessman and politician (died 2014)
Janet Evanovich, American author
Louise Glück, American poet (died 2023)
John Maples, Baron Maples, English lawyer and politician, Shadow Secretary of State for Defence (died 2012)
Scott W. Williams, American mathematician and professor
Giorgio Agamben, Italian philosopher and academic
Mary Prior, English politician, Lord Lieutenant of Bristol
Greville Howard, Baron Howard of Rising, English politician
Mel Carter, American singer and actor
John Foley, English general and politician, Lieutenant Governor of Guernsey
Ray Guy, Canadian journalist and author (died 2013)
Jason Miller, American actor and playwright (died 2001)
Theodor Waigel, German lawyer and politician, German Federal Minister of Finance
Alan Bond, English-Australian businessman (died 2015)
Gani Fawehinmi, Nigerian lawyer and activist (died 2009)
Issey Miyake, Japanese fashion designer (died 2022)
Adam Raphael, English journalist and author
Jack Nicholson, American actor and producer
Jack Nitzsche, American singer-songwriter, pianist, and conductor (died 2000)
Glen Campbell, American singer-songwriter, guitarist, and actor (died 2017)
Pierre Hétu, Canadian pianist and conductor (died 1998)
Christopher Ball, English linguist and academic
Paul Chambers, African-American bassist and composer (died 1969)
Bhama Srinivasan, Indian-American mathematician and academic
Anthony Llewellyn, Welsh-American chemist and astronaut (died 2013)
John Buchanan, Canadian lawyer and politician, 20th Premier of Nova Scotia (died 2019)
Ronald Hynd, English dancer and choreographer
Enno Penno, Estonian politician, Prime Minister of Estonia in exile (died 2016)
Michael Atiyah, English-Lebanese mathematician and academic (died 2019)
Robert Wade-Gery, English diplomat, British High Commissioner to India (died 2015)
Estelle Harris, American actress and comedian (died 2022)
Laurel Aitken, Cuban-Jamaican singer (died 2005)
Charlotte Rae, American actress and singer (died 2018)
James Stirling, Scottish architect, designed the Staatsgalerie Stuttgart and Seeley Historical Library (died 1992)
Nam Duck-woo, South Korean politician, 12th Prime Minister of South Korea (died 2013)
Peter Kane Dufault, American soldier, pilot, and poet (died 2013)
Bettie Page, American model and actress (died 2008)
Aaron Spelling, American actor, producer, and screenwriter (died 2006)
Richard Diebenkorn, American soldier and painter (died 1993)
Charles Mingus, American bassist, composer, and bandleader (died 1979)
Wolf V. Vishniac, American microbiologist and academic (died 1973)
Donald J. Cram, American chemist and academic, Nobel Prize laureate (died 2001)
Carl Lindner, Jr., American businessman and philanthropist (died 2011)
William Jay Smith, American poet and academic (died 2015)
Mickey Vernon, American baseball player and coach (died 2008)
Yvette Chauviré, French ballerina (died 2016)
Sidney Nolan, Australian painter (died 1992)
Hanfried Lenz, German mathematician and academic (died 2013)
Yehudi Menuhin, American-Swiss violinist and conductor (died 1999)
Baldev Raj Chopra, Indian director and producer (died 2008)
Jan de Hartog, Dutch-American author and playwright (died 2002)
José Quiñones Gonzales, Peruvian soldier and pilot (died 1941)
Michael Wittmann, German SS officer (died 1944)
Kathleen Ferrier, English operatic singer (died 1953)
Kaneto Shindo, Japanese director, producer, and screenwriter (died 2012)
Norman Steenrod, American mathematician and academic (died 1971)
Rita Levi-Montalcini, Italian neurologist and academic, Nobel Prize laureate (died 2012)
Indro Montanelli, Italian journalist and historian (died 2001)
Spyros Markezinis, Greek politician, Prime Minister of Greece (died 2000)
Eric Fenby, English composer and educator (died 1997)
Prince Gustaf Adolf, Duke of Västerbotten (died 1947)
Robert Choquette, American-Canadian author, poet, and diplomat (died 1991)
J. Robert Oppenheimer, American physicist and academic (died 1967)
Nellie Beer, British politician, Lord Mayor of Manchester (died 1988)
Vladimir Nabokov, Russian-born novelist and critic (died 1977)
Vernon Johns, African-American minister and activist (died 1965)
Laura Gilpin, American photographer (died 1979)
Vittorio Jano, Italian engineer (died 1965)
Harold Jeffreys, English mathematician, geophysicist, and astronomer (died 1989)
Nicola Sacco, Italian-American anarchist (died 1927)
Richard Glücks, German SS officer (died 1945)
Harald Bohr, Danish mathematician and footballer (died 1951)
Izidor Cankar, Slovenian historian, author, and diplomat (died 1958)
Otto Rank, Austrian-American psychologist and academic (died 1939)
Bernhard Gregory, Estonian-German chess player (died 1939)
Róbert Bárány, Austrian-Swedish otologist and physician, Nobel Prize laureate (died 1936)
Georg Lurich, Estonian wrestler and strongman (died 1920)
Wu Peifu, Chinese warlord, politician, and marshal of the Beiyang Army (died 1939)
Ellen Glasgow, American author (died 1945)
Princess Margaret of Prussia (died 1954)
Vladimir Lenin, Russian revolutionary and founder of Soviet Russia (died 1924)
Ethel Smyth, English composer (died 1944)
Fritz Mayer van den Bergh, Belgian art collector and art historian (died 1901)
Henri La Fontaine, Belgian lawyer and author, Nobel Prize laureate (died 1943)
William IV, Grand Duke of Luxembourg (died 1912)
Lewis Powell, American soldier, attempted assassin of William H. Seward (died 1865)
Julius Sterling Morton, American journalist and politician, 3rd United States Secretary of Agriculture (died 1902)
Emily Davies, British suffragist and educator, co-founder and an early Mistress of Girton College, Cambridge University (died 1921)
Charles-Denis Bourbaki, French general (died 1897)
Solomon Caesar Malan, Swiss-English orientalist (died 1894)
Germaine de Staël, French author and political philosopher (died 1817)
James Sullivan, American lawyer and politician, 7th Governor of Massachusetts (died 1808)
John Johnson, English architect and surveyor (died 1814)
Immanuel Kant, German anthropologist, philosopher, and academic (died 1804)
Paul II Anton, Prince Esterházy, Austrian soldier (died 1762)
Henry Fielding, English novelist and playwright (died 1754)
John Carteret, 2nd Earl Granville, English politician, Lord President of the Council (died 1763)
Giuseppe Torelli, Italian violinist and composer (died 1709)
Pope Alexander VIII (died 1691)
Wilhelm Schickard, German astronomer and mathematician (died 1635)
Antoine of Navarre (died 1562)
Isabella I of Castile (died 1504)
Elizabeth of York, Duchess of Suffolk (died 1503)
Reinhard III, Count of Hanau (1451–1452) (died 1452)
Len Goodman, English ballroom dancer and television personality (born 1944)
Guy Lafleur, Canadian ice hockey player (born 1951)
Adrian Garrett, American professional baseball player (born 1943)
Shirley Knight, American actress (born 1936)
Donna Leanne Williams, Australian writer, artist, and activist (born 1963)
Dick Balharry, Scottish environmentalist and photographer (born 1937)
Oswaldo Vigas, Venezuelan painter (born 1926)
Richie Havens, American singer-songwriter and guitarist (born 1941)
Lalgudi Jayaraman, Indian violinist and composer (born 1930)
Robert Suderburg, American pianist, composer, and conductor (born 1936)
George Rathmann, American chemist, biologist, and businessman (born 1927)
Richard Barrett, American lawyer and activist (born 1943)
Jack Cardiff, British cinematographer, director and photographer (born 1914)
Juanita Millender-McDonald, American educator and politician (born 1938)
Henriette Avram, American computer scientist and academic (born 1919)
Alida Valli, Italian actress (born 1921)
Erika Fuchs, German translator (born 1906)
Philip Morrison, American physicist and academic (born 1915)
Eduardo Paolozzi, Scottish sculptor and artist (born 1924)
Felice Bryant, American songwriter (born 1925)
Munir Ahmad Khan, Pakistani nuclear engineer (born 1926)
Erma Bombeck, American journalist and author (born 1927)
Jug McSpaden, American golfer and architect (born 1908)
Jane Kenyon, American poet and author (born 1947)
Richard Nixon, 37th President of the United States (born 1913)
Albert Salmi, American actor (born 1928)
Emilio G. Segrè, Italian-American physicist and academic, Nobel Prize laureate (born 1905)
Grigori Kuzmin, Russian-Estonian astronomer and academic (born 1917)
Irene Rich, American actress (born 1891)
Erika Nõva, Estonian architect (born 1905)
Mircea Eliade, Romanian historian and author (born 1907)
Paul Hugh Emmett, American chemist and academic (born 1900)
Jacques Ferron, Canadian physician and author (born 1921)
Ansel Adams, American photographer and environmentalist (born 1902)
Earl Hines, American pianist and bandleader (born 1903)
Jane Froman, American actress and singer (born 1907)
Fritz Strassmann, German chemist and physicist (born 1902)
Will Geer, American actor (born 1902)
Horace Donisthorpe, English myrmecologist and coleopterist (born 1870)
Charles Hamilton Houston, American lawyer and academic (born 1895)
Wilhelm Cauer, German mathematician and academic (born 1900)
Käthe Kollwitz, German painter and sculptor (born 1867)
Henry Royce, English engineer and businessman, co-founded Rolls-Royce Limited (born 1863)
Ferenc Oslay, Hungarian-Slovene historian and author (born 1883)
Henry Lerolle, French painter and art collector (born 1848)
André Caplet, French composer and conductor (born 1878)
Henry Campbell-Bannerman, Prime Minister of the United Kingdom (born 1836)
Thomas Meik, English engineer, founded Halcrow Group (born 1812)
Kostas Krystallis, Greek author and poet (born 1868)
Chaim Aronson, Lithuanian businessman and author (born 1825)
Édouard Lalo, French violinist and composer (born 1823)
James P. Kirkwood, Scottish-American engineer (born 1807)
Martín Carrera, Mexican general and president (1855) (born 1806)
Nicolás Bravo, Mexican general and politician, 11th President of Mexico (born 1786)
Friedrich Robert Faehlmann, Estonian philologist and physician (born 1798)
Richard Trevithick, English engineer and explorer (born 1771)
Gregory V of Constantinople, Greek patriarch and saint (born 1746)
Pierre-Charles Villeneuve, French admiral (born 1763)
James Hargreaves, British inventor (born 1720)
Antoine de Jussieu, French botanist and physician (born 1686)
Hans Erasmus Aßmann, German poet (born 1646)
Georg Stiernhielm, Swedish linguist and poet (born 1598)
Miguel de Cervantes, Spanish novelist, poet, and playwright (born 1547)
Henry of Saxe-Lauenburg, Prince-Archbishop of Bremen, Prince-Bishop of Osnabrück and Paderborn (born 1550)
Eleanor of Woodstock, countess regent of Guelders, eldest daughter of King Edward II of England (born 1318)
Francis of Fabriano, Italian writer (born 1251)
Philip of Poitou, Prince-Bishop of Durham
Wuzong, Chinese emperor (born 814)
Kūkai, Japanese Buddhist monk, founder of Esoteric (Shingon) Buddhism (born 774)
Saint Theodore of Sykeon
Peter III of Raqqa
Pope Agapetus I
Pope Caius
Christian feast day: Acepsimas of Hnaita and companions (Catholic Church)
Christian feast day: Arwald
Christian feast day: Epipodius and Alexander
Christian feast day: Hudson Stuck (Episcopal Church)
Christian feast day: John Muir (Episcopal Church)
Christian feast day: Opportuna of Montreuil
Christian feast day: Pope Caius
Christian feast day: Pope Soter
Christian feast day: St Senorina
Christian feast day: April 22 (Eastern Orthodox liturgics)
Fighter Aviation Day (Brazil)
Discovery Day (Brazil)
Earth Day (International observance) and its related observance: International Mother Earth Day
Holocaust Remembrance Day (Serbia)
From 2018 onwards, a national day of commemoration for the murdered teenager Stephen Lawrence (United Kingdom)