April 22 is the 112th day of the year (113th in leap years) in the Gregorian calendar. There are 253 days remaining until the end of the year.
1901 – 2000
- 1906 - Start of the 1906 Summer Olympics in Athens. They are not officially counted as part of the modern Olympic Games.
- 1906 - End of the Mount Vesuvius eruption that started on April 4. In total, 1,000 people are estimated to have died as a result of the effects from the eruption.
- 1911 - Tsinghua University, one of China's top universities, is founded.
- 1912 - Pravda begins publication in Saint Petersburg, known as the "voice" of the Communist Party of the Soviet Union.
- 1914 – Babe Ruth, age 19, pitches his first professional game for the minor league Baltimore Orioles.
- 1915 – 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.
- 1930 – The United Kingdom, Japan and the United States sign the London Naval Treaty regulating submarine warfare and limiting shipbuilding.
- 1943 – Albert Hofmann writes his first report about the hallucinogenic properties of LSD.
- 1944 – World War II: Operation Persecution initiated – Allied forces land in the Hollandia area of New Guinea.
- 1945 – World War II: After learning that Soviet forces have taken Eberswalde without a fight, Adolf Hitler admits defeat in his underground bunker and states that suicide is his only recourse.
- 1946 – The first installment of the popular Japanese comic strip, Sazae-san, is published in the Fukunichi Shimbun.
- 1948 - 1948 Arab-Israeli War: Haifa is captured from Arab forces.
- 1954 – Red Scare: Army-McCarthy Hearings begin.
- 1964 – The 1964-1965 New York World's Fair opens for its first season.
- 1969 - British yachtsman Robin Knox-Johnston completes the first solo round-the-world journey.
- 1970 – The first Earth Day is celebrated.
- 1971 – John Kerry, dressed in combat fatigues, testifies on his views of the Vietnam War before the United States Senate Foreign Relations Committee.
- 1972 – Vietnam War: Increased American bombing in Vietnam prompts antiwar protests in New York City, San Francisco, and Los Angeles.
- 1974 - A PanAm Boeing 707 crashes into a mountain on Bali, as it approaches to land. All 107 people on board are killed.
- 1975 – Barbara Walters signs a five-year $5 million contract with the American Broadcasting Corporation (ABC), becoming the highest paid television newsperson.
- 1978 – The Blues Brothers make their first appearance on Saturday Night Live.
- 1979 – Brent Mydland performs his first show with the Grateful Dead at Spartan Stadium, San Jose, California.
- 1980 - Filipino ferry Don Juan sinks after a collision with a tanker.
- 1991 - A magnitude 7.5 earthquake in Costa Rica kills 47 people.
- 1992 – Several explosions in underground canals in Guadalajara, Mexico, kill 200 people.
- 1993 – In Washington, DC, the Holocaust Memorial Museum is dedicated.
- 1993 – The web browser Mosaic version 1.0 is released.
- 1993 - The racially motivated murder of 18-year-old Stephen Lawrence is committed in Southeast London.
- 1996 – Cisco Systems acquires StrataCom for $4B
- 1997 – Haouch Khemisti massacre in Algeria; 93 villagers killed.
- 1997 – A 126-day hostage crisis at the residence of the Japanese ambassador in Lima, Peru ends after government commandos storm and capture the building, rescuing 71 hostages. One hostage dies of a heart attack, two soldiers are killed from rebel fire, and all 14 rebels are slain.
- 1998 - Disney's Animal Kingdom opens in Florida.
- 2000 – In a predawn raid, federal agents seize six-year-old Elián González from his relatives' home in Miami, Florida.
- 2000 – The Big Number Change takes place in the United Kingdom.
1801 – 1900
- 1812 – Solomon Caesar Malan, orientalist (d. 1894)
- 1812 - James Broun-Ramsay, 1st Marquess of Dalhousie, Scottish Governor-General of India (d. 1860)
- 1832 - Julius Sterling Morton, American politician (d. 1902)
- 1840 – Odilon Redon, French painter (d. 1916)
- 1844 – Lewis Powell, American attempted assassin (d. 1865)
- 1852 – Guillaume IV, Grand Duke of Luxembourg (d. 1912)
- 1854 – Henri La Fontaine, Belgian lawyer (d. 1943)
- 1866 - Hans von Seeckt, German military officer and politician (d. 1936)
- 1868 – Archduchess Marie Valerie of Austria (d. 1924)
- 1870 (N.S.) - Vladimir Lenin, Soviet-Russian Communist revolutionary and political leader (d. 1924)
- 1872 - Princess Margaret of Prussia (d. 1954)
- 1873 – Ellen Glasgow, American writer (d. 1945)
- 1873 – Luigi Lucheni, Italian anarchist (d. 1910)
- 1876 – Róbert Bárány, Austrian Nobel Prize winner in medicine (d. 1936)
- 1881 – Alexander Kerensky, Russian politician (d. 1970)
- 1884 - Otto Rank, Austrian psychologist (d. 1939)
- 1891 – Harold Jeffreys, English astronomer (d. 1989)
- 1891 – Nicola Sacco, anarchist (d. 1927)
- 1899 – Vladimir Nabokov, Russian writer (d. 1977)
1901 – 1925
- 1902 - Megan Lloyd George, Welsh politician (d. 1966)
- 1903 - Daphne Akhurst, Australian tennis player (d. 1930)
- 1904 – J. Robert Oppenheimer, American physicist (d. 1967)
- 1906 – Prince Gustaf Adolf, Duke of Vasterbotten, Swedish royal, father of King Carl XVI Gustaf of Sweden (d. 1947)
- 1906 – Snorri Hjartarson, Icelandic writer (d. 1986)
- 1906 – Eddie Albert, American actor (d. 2005)
- 1908 - Ivan Yefremov, Russian paleontologist and science fiction writer (d. 1972)
- 1909 – Rita Levi-Montalcini, Italian neurologist, Nobel Prize winner (d. 2012)
- 1909 - Indro Montanelli, Italian journalist, writer and historian (d. 2001)
- 1910 – Norman Steenrod, American mathematician (d. 1971)
- 1912 - Kaneto Shindo, Japanese director (d. 2012)
- 1912 – Kathleen Ferrier, English contralto (d. 1953)
- 1914 – Jan de Hartog, Dutch writer (d. 2002)
- 1916 – Yehudi Menuhin, American-born violinist (d. 1999)
- 1917 – Sidney Nolan, Australian painter (d. 1992)
- 1917 - Yvette Chauviré, French actress and ballerina (d. 2016)
- 1918 - William Jay Smith, American poet (d. 2015)
- 1919 - Antonio Nirta, Italian criminal (d. 2015)
- 1919 – Donald J. Cram, American chemist (d. 2001)
- 1922 – Charles Mingus, American jazz musician (d. 1979)
- 1922 – Wolf V. Vishniac, American microbiologist (d. 1973)
- 1923 – Bettie Page, American pin-up model (d. 2008)
- 1923 – Aaron Spelling, American television producer, writer (d. 2006)
- 1923 - Paula Fox, American writer (d. 2017)
- 1924 - Nam Duck-woo, 12th Prime Minister of South Korea (d. 2013)
- 1925 - George Cole, English actor (d. 2015)
1926 – 1950
- 1926 – James Stirling, British architect (d. 1992)
- 1926 - Ted Hibberd, Canadian ice hockey player (d. 2017)
- 1926 – Charlotte Rae, American actress (d. 2018)
- 1929 - Guillermo Cabrera Infante, Cuban writer (d. 2005)
- 1930 - Enno Penno, Estonian politician (d. 2016)
- 1931 - John Buchanan, Canadian politician, 20th Premier of Nova Scotia
- 1932 - Isao Tomita, Japanese musician and composer (d. 2016)
- 1933 - Mark Damon, American movie actor and producer
- 1933 - Anthony Llewellyn, Welsh-American astronaut (d. 2013)
- 1935 - Mario Machado, Chinese-American journalist and actor (d. 2013)
- 1936 – Glen Campbell, American musician and singer (d. 2017)
- 1937 – Jack Nicholson, American actor
- 1937 – Jack Nitzsche, American composer, arranger (d. 2000)
- 1939 – Theo Waigel, German politician
- 1939 - John Chilcot, English civil servant
- 1939 – Jason Miller, American playwright (d. 2001)
- 1939 - Mel Carter, American singer and actor
- 1942 - Giorgio Agamben, Italian philosopher
- 1943 – Louise Glück, American poet (d. 2023)
- 1944 - Doug Jarrett, Canadian ice hockey player (d. 2014)
- 1944 – Steve Fossett, American millionaire and adventurer (d. 2007)
- 1945 - Demetrio Stratos, Italian musician (d. 1979)
- 1945 - Gopal Krishna Gandhi, Indian politician, 22nd Governor of West Bengal
- 1946 – John Waters, American movie maker
- 1947 - Barry Guy, British composer and musician
- 1947 - Neil Horan, Irish priest
- 1950 – Peter Frampton, English musician
1951 – 1975
- 1951 – Robin Bartlett, American actress
- 1952 – Marilyn Chambers, American erotic actress (d. 2009)
- 1953 - Valeri Bondarenko, Estonian footballer and coach
- 1954 – Kamla Persad-Bissessar, Prime Minister of Trinidad and Tobago
- 1957 – Donald Tusk, President of the European Council and former Prime Minister of Poland
- 1959 – Ryan Stiles, Canadian-American actor, comedian
- 1959 - Catherine Mary Stewart, Canadian actress
- 1959 - Terry Francona, American baseball player, coach and manager
- 1960 – Mart Laar, former Prime Minister of Estonia
- 1960 - Gary Rhodes, English chef
- 1961 - Ann McKechin, Scottish politician
- 1963 - Sean Lock, English comedian and actor
- 1964 - James Langevin, American politician
- 1964 - Massimo Carrera, Italian footballer
- 1967 - Sherri Shepherd, American comedienne, actress and talk show host
- 1967 – Sheryl Lee, American actress
- 1969 – Dion Dublin, English footballer
- 1969 - Billy McKinlay, Scottish footballer
- 1969 - Vanessa Goodwin, Australian politician (d. 2018)
- 1970 - Regine Velasquez, Filipino singer, actress and producer
- 1971 – Eric Mabius, American actor
- 1971 – Anwar al-Awlaki, American-born Yemeni terrorist (d. 2011)
- 1972 - Anna Falchi, Finnish-Italian actress
- 1973 - Brian Marshall, American musician
- 1974 – Shavo Odadjian, Armenian-born bassist for System of a Down
From 1976
- 1977 – Mark van Bommel, Dutch footballer
- 1977 - Ambra Angiolini, Italian actress
- 1979 – Zoltán Gera, Hungarian footballer
- 1981 - Jonathan Trott, South African-English cricketer
- 1982 – Kaka, Brazilian footballer
- 1982 - Cassidy Freeman, American actress, singer and musician
- 1983 - Jos Hooiveld, Dutch footballer
- 1983 - Daniel Sjolund, Finnish footballer
- 1983 - Francis Capra, American actor
- 1984 – Amelle Berrabah, English singer (Sugababes)
- 1984 – Michelle Ryan, English actress
- 1986 – Amber Heard, American actress
- 1986 - Kim Noorda, Dutch model
- 1987 – David Luiz, Brazilian footballer
- 1987 – Mikel John Obi, Nigerian footballer
- 1989 - Louis Smith, English gymnast
- 1989 - Thomas James Longley, English actor and model
- 1989 - Jasper Cillessen, Dutch footballer
- 1990 - Victor Dubuisson, French cyclist
- 1990 - Machine Gun Kelly, American rapper
- 1990 – Eve Muirhead, Scottish curler
- 1992 - Rolene Strauss, South African model
- 1996 - Wendy Sulca, Peruvian singer
Up to 1900
- 296 – Pope Caius
- 536 – Pope Agapetus I
- 1592 – Bartolomeo Ammanati, Italian architect and sculptor (b. 1511)
- 1672 – Georg Stiernhielm, Swedish poet (b. 1598)
- 1699 – Hans Erasmus Aßmann, Freiherr von Abschatz, German statesman and poet (b. 1646)
- 1758 – Antoine de Jussieu, French naturalist (b. 1686)
- 1778 - James Hargreaves, English inventor (b. 1720)
- 1806 – Pierre-Charles Villeneuve, French admiral (stabbed) (b. 1763)
- 1827 – Thomas Rowlandson, English painter and caricaturist (b. 1756)
- 1833 – Richard Trevithick, English inventor (b. 1771)
- 1854 - Nicolas Bravo, 11th President of Mexico (b. 1786)
- 1884 - Marie Taglioni, Swedish ballerina (b. 1804)
- 1892 – Edouard Lalo, French composer (b. 1823)
- 1893 – Chaim Aronson, Lithuanian inventor and academic (b. 1825)
- 1896 – Thomas Meik, British civil engineer (b. 1812)
1901 – 2000
- 1908 – Henry Campbell-Bannerman, Prime Minister of the United Kingdom (b. 1836)
- 1925 – André Caplet, French composer (b. 1878)
- 1930 – Jeppe Aakjaer, Danish poet and novelist (b. 1866)
- 1933 – Henry Royce, British automobile manufacturer (b. 1863)
- 1945 – Käthe Kollwitz, German artist (b. 1867)
- 1946 – Harlan F. Stone, Chief Justice of the United States Supreme Court (b. 1872)
- 1951 – Horace Donisthorpe, British entomologist (b. 1870)
- 1968 – Stephen H. Sholes, American recording executive (b. 1911)
- 1978 – Will Geer, American actor and activist (b. 1902)
- 1980 – Fritz Strassmann, German physicist (b. 1902)
- 1980 - Jane Froman, American actress (b. 1907)
- 1983 – Earl "Fatha" Hines, American jazz pianist (b. 1903)
- 1984 – Ansel Adams, American photographer (b. 1902)
- 1986 – Mircea Eliade, Romanian writer and philosopher (b. 1907)
- 1989 - Emilio G. Segre, Italian-American physicist (b. 1905)
- 1990 - Albert Salmi, American actor (b. 1928)
- 1993 - Stephen Lawrence, English student (b. 1974)
- 1994 – Richard Nixon, 37th President of the United States (b. 1913)
- 1995 – Maggie Kuhn, American activist (b. 1905)
- 1996 – Erma Bombeck, American humorist and writer (b. 1927)
- 1999 - Apostolos Nikolaidis, Greek singer (b. 1938)
From 2001
- 2002 – Linda Lovelace, American actress (b. 1949)
- 2003 – Martha Griffiths, U.S. Congresswoman (b. 1912)
- 2003 – Michael Larrabee, American athlete (b. 1933)
- 2004 – Pat Tillman, American football player and U.S. Army Ranger (killed in action) (b. 1976)
- 2005 – Philip Morrison, American physicist (b. 1915)
- 2005 – Eduardo Paolozzi, Scottish artist and sculptor (b. 1924)
- 2006 - Alida Valli, Italian actress (b. 1921)
- 2009 – Jack Cardiff, English director (b. 1914)
- 2009 – Ken Annakin, English director (b. 1914)
- 2013 - Richie Havens, American folk singer and guitarist (b. 1941)
- 2013 - Vivi Bach, Danish actress (b. 1939)
- 2014 - Oswaldo Vigas, Venezuelan painter (b. 1924)
- 2015 - Lois Lilienstein, Canadian singer and musician (Sharon, Lois & Bram) (b. 1936)
- 2015 - Dick Balharry, Scottish conservationist, writer and wildlife photographer (b. 1937)
- 2015 - Gennadi Vengerov, Belarussian-born actor (b. 1959)
- 2015 - Dorothy Custer, American comedienne (b. 1911)
- 2016 - Jory Prum, American audio engineer and video game developer (b. 1975)
- 2016 - Peter Sellers, New Zealand broadcaster (b. 1921)
- 2017 - Hubert Dreyfus, American philosopher (b. 1929)
- 2017 - William Hjortsberg, American writer and screenwriter (b. 1941)
- 2017 - Jess Kersey, American basketball official (b. 1941)
- 2017 - Erin Moran, American actress (b. 1960)
- 2017 - Attilio Nicora, Italian cardinal (b. 1937)
- 2017 - Witold Pyrkosz, Polish actor (b. 1926)
- 2017 - Gustavo Rojo, Uruguayan actor (b. 1923)
- 2017 - Michele Scarponi, Italian racing cyclist (b. 1979)
- 2018 - Demeter Bitenc, Slovenian actor (b. 1922)
- 2018 - Nino Khurtsidze, Georgian chess player (b. 1975)
- 2018 - Dave Nelson, American baseball player (b. 1944)
- 2019 - Krasimir Bezinski, Bulgarian footballer (b. 1961)
- 2019 - Robert L. Butler, American politician (b. 1927)
- 2019 - Heather Harper, Northern Irish soprano (b. 1930)
- 2019 - Ventseslav Konstantinov, Bulgarian writer and translator (b. 1940)
- 2019 - Le Duc Anh, former President of Vietnam (b. 1920)
- 2019 - Billy McNeill, Scottish footballer (b. 1940)
- 2019 - Oiva Toikka, Finnish glass designer (b. 1931)
- 2019 - Julio César Toresani, Argentine footballer (b. 1967)