May 24 is the 144th day of the year in the Gregorian calendar (145th in leap years). There are 221 days remaining.

  1. 1153 - Malcolm IV becomes King of Scotland.
  2. 1218 - The Fifth Crusade leaves Acre for Egypt.
  3. 1276 - Magnus Ladulås crowned King of Sweden in Uppsala Cathedral.
  4. 1487 - Imposter Lambert Simnel is crowned as "King Edward VI" at Dublin.
  5. 1595 - Nomenclator of Leiden University Library appears, the first printed catalog of an institutional library.
  6. 1621 - Protestant Union formally dissolved.
  7. 1626 - Peter Minuit buys Manhattan.
  8. 1689 - The English Parliament passes the Act of Toleration protecting Protestants (Roman Catholics are intentionally excluded).
  9. 1738 - John Wesley is converted, essentially launching the Methodist movement; the day is celebrated annually by Methodists as Aldersgate Day.
  10. 1787 - The United States Constitutional Convention is convened after a quorum of delegates arrives in Philadelphia, Pennsylvania.
  11. 1798 - Irish Rebellion of 1798 led by the United Irishmen against British rule begins.
  12. 1822 - Battle of Pichincha: Antonio José de Sucre secures the independence of the Presidency of Quito.
  13. 1830 - Mary had a little lamb by Sarah Hale is published.
  14. 1844 - Samuel F. B. Morse sent the message "What hath God wrought" (a Bible quotation, Numbers 23:23) from the Supreme Court room in Washington, D.C. to his assistant, Alfred Vail, in Baltimore, Maryland.
  15. 1846 - Mexican-American War: General Zachary Taylor captures Monterrey.
  16. 1856 - John Brown and his men murder five slavery supporters at Pottawatomie Creek, Kansas.
  17. 1861 - American Civil War: Union troops occupy Alexandria, Virginia.
  18. 1883 - The Brooklyn Bridge in New York is opened to traffic after 14 years of construction.
  19. 1893 - The Niagara Falls Park and River Railway opens in Ontario.
  20. 1895 - Henry Irving becomes the first personage from the theatre to be knighted.
  21. 1899 - The first public parking garage in the United States is opened in Boston, Massachusetts.
  22. 1900 - Second Boer War: The United Kingdom annexes the Orange Free State.
  23. 1911 - The New York Public Library opened.
  24. 1915 - World War I: Italy declares war on Austria-Hungary.
  25. 1921 - The trial of Sacco and Vanzetti opens.
  26. 1929 - The Cocoanuts, the first film to star the Marx Brothers, opens.
  27. 1930 - Amy Johnson lands in Darwin, Northern Territory, becoming the first woman to fly from England to Australia (she left on May 5 for the 11,000 mile flight).
  28. 1935 - Crosley Field in Cincinnati, Ohio, hosts major-league baseball's first night game ever as the Cincinnati Reds beat the Philadelphia Phillies 2-1.
  29. 1940 - Igor Sikorsky performs the first successful single-rotor helicopter flight.
  30. 1941 - World War II: In the North Atlantic, the German Battleship Bismarck sinks the HMS Hood killing all but three crewmen on what was the pride of the Royal Navy.
  31. 1943 - Holocaust: Josef Mengele becomes chief medical officer in Auschwitz concentration camp.
  32. 1949 - The Soviet Union ends the 11-month Berlin Blockade.
  33. 1958 - United Press International is formed through a merger of the United Press and the International News Service.
  34. 1961 - American civil rights movement: Freedom Riders are arrested in Jackson, Mississippi for "disturbing the peace" after disembarking from their bus.
  35. 1961 - Cyprus enters the Council of Europe.
  36. 1962 - American astronaut Scott Carpenter orbits the Earth three times in the Aurora 7 space capsule.
  37. 1968 - Students set fire to the Paris bourse.
  38. 1968 - FLQ separatists bomb the U.S. consulate in Quebec City.
  39. 1970 - The drilling of the Kola Superdeep Borehole begins in the USSR
  40. 1974 - After a nine-year run, The Dean Martin Show airs for the last time.
  41. 1976 - London to Washington, DC Concorde service begins.
  42. 1980 - The International Court of Justice calls for the release of United States embassy hostages in Tehran. The hostages would not be freed until the following January.
  43. 1980 - Bobby Nystrom scores the game winning overtime goal to lift the New York Islanders to their first of four consecutive Stanley Cups.
  44. 1981 - First International Women's Day for Disarmament.
  45. 1988 - Section 28 is passed as law by Parliament in the United Kingdom.
  46. 1989 - Sonia Sutcliffe, wife of the Yorkshire Ripper, is awarded a six-figure sum in damages after winning a libel action against Private Eye.
  47. 1990 - A car carrying American Earth First! activists Judi Bari and Darryl Cherney explodes in Oakland, California, critically injuring both.
  48. 1991 - Israel conducts Operation Solomon, evacuating Ethiopian Jews to Israel.
  49. 1992 - The last Thai dictator, General Suchinda Kraprayoon, resigns following pro-democracy protests.
  50. 1993 - Eritrea gains its independence from Ethiopia.
  51. 1993 - Microsoft unveils Windows NT.
  52. 1999 - Venezuela entered the Antarctic Treaty System.
  53. 2000 - Israeli troops withdraw from southern Lebanon after 22 years of occupation.
  54. 2001 - Mountain climbing: 15-year-old Sherpa Temba Tsheri becomes the youngest person to climb to the top of Mount Everest.
  55. 2001 - The Versailles wedding hall collapse in Jerusalem, Israel, kills 23 and injures over 200 in Israel's worst-ever civil disaster.
  56. 2002 - Russia and the United States sign the Moscow Treaty.