April 11

April 11 is the 101st day of the year (102nd in leap years) in the Gregorian calendar; 264 days remain until the end of the year.

Historical events

• 1111 – Henry V is crowned Holy Roman Emperor by Pope Paschal II.
• 1814 – Napoleon abdicates the throne of France and is exiled to the island of Elba.
• 1868 – The American Museum of Natural History is founded in New York City.
• 1899 – The United States takes formal possession of Puerto Rico from Spain.
• 1951 – Korean War: U.S. President Harry S. Truman relieves General Douglas MacArthur of his commands.
• 1954 – The first IBM 704 mainframe computer is demonstrated.
• 1970 – Apollo 13 is launched from the Kennedy Space Center; an oxygen tank explosion two days later leads to a dramatic and successful rescue mission.
• 1979 – Ugandan-Tanzanian War: Tanzanian forces capture Kampala, forcing Ugandan President Idi Amin to flee the country.
• 1980 – The United States Olympic Committee announces it will boycott the 1980 Summer Olympics in Moscow in response to the Soviet invasion of Afghanistan.
• 2012 – A magnitude 8.6 earthquake strikes off the coast of Sumatra, Indonesia, triggering tsunami warnings across the Indian Ocean.

Births

• 145 – Septimius Severus, Roman emperor (d. 211)
• 1357 – John I, King of Portugal (d. 1433)
• 1869 – Gustav Holst, English composer and music teacher (d. 1934)
• 1933 – Shirley Jones, American actress and singer
• 1962 – Jeremy Clarkson, English journalist and television presenter
• 1980 – Keegan-Michael Key, American actor and comedian

Deaths

• 1985 – Enver Hoxha, Albanian politician and dictator (b. 1908)
• 1987 – Primo Levi, Italian chemist and author (b. 1919)
• 2007 – Kurt Vonnegut, American novelist and essayist (b. 1922)
• 2012 – Ahmed Ben Bella, Algerian politician, 1st President of Algeria (b. 1916)

Holidays and observances

• World Parkinson's Day
• Christian feast day: Saint Stanislaus of Szczepanów, Saint Gemma Galgani, Saint Antipas of Pergamum
• National Louie Day (United States)