24 April

1479 BC – Thutmose III ascends to the throne of Egypt, although power effectively shifts to Hatshepsut (according to the Low Chronology of the 18th Dynasty).
1547 – Battle of Mühlberg. Duke of Alba, commanding Spanish-Imperial forces of Charles I of Spain, defeats the troops of Schmalkaldic League.
1558 – Mary, Queen of Scots, marries the Dauphin of France, François, at Notre Dame de Paris.
1704 – The first regular newspaper in the United States, the News-Letter, is published in Boston, Massachusetts.
1800 – The United States Library of Congress is established when President John Adams signs legislation to appropriate $5,000 USD to purchase "such books as may be necessary for the use of Congress".
1862 – American Civil War: A flotilla commanded by Union Admiral David Farragut passes two Confederate forts on the Mississippi River on its way to capture New Orleans, Louisiana.
1877 – Russo-Turkish War: Russian Empire declares war on Ottoman Empire.
1885 – American sharpshooter Annie Oakley was hired by Nate Salsbury to be a part of Buffalo Bill's Wild West.
1898 – The Spanish-American War: The United States declares war on Spain.
1904 – The Lithuanian press ban is lifted after almost 40 years.
1907 – Hersheypark, founded by Milton S. Hershey for the exclusive use of his employees, is opened.
1907 – Al Ahly was founded.
1913 – The Woolworth Building skyscraper in New York City is opened.
1915 – The arrest of 250 Armenian intellectuals and community leaders in Istanbul marks the beginning of the Armenian Genocide.
1916 – Easter Rising: The Irish Republican Brotherhood led by nationalists Patrick Pearse, James Connolly, and Joseph Plunkett starts a rebellion in Ireland.
1916 – Ernest Shackleton and five men of the Imperial Trans-Antarctic Expedition launch a lifeboat from uninhabited Elephant Island in the Southern Ocean to organise a rescue for the ice-trapped ship Endurance.
1918 – First tank-to-tank combat, at Villers-Bretonneux, France, when three British Mark IVs met three German A7Vs.
1922 – The first segment of the Imperial Wireless Chain providing wireless telegraphy between Leafield in Oxfordshire, England, and Cairo, Egypt, comes into operation.
1926 – The Treaty of Berlin is signed. Germany and the Soviet Union each pledge neutrality in the event of an attack on the other by a third party for the next five years.
1932 – Benny Rothman leads the mass trespass of Kinder Scout, leading to substantial legal reforms in the United Kingdom.
1953 – Winston Churchill is knighted by Queen Elizabeth II.
1955 – The Bandung Conference ends: 29 non-aligned nations of Asia and Africa finish a meeting that condemns colonialism, racism, and the Cold War.
1957 – Suez Crisis: The Suez Canal is reopened following the introduction of UNEF peacekeepers to the region.
1963 – Marriage of HRH Princess Alexandra of Kent to the Hon Angus Ogilvy at Westminster Abbey in London.
1965 – Civil war breaks out in the Dominican Republic when Colonel Francisco Caamaño, overthrows the triumvirate that had been in power since the coup d'état against Juan Bosch.
1967 – Cosmonaut Vladimir Komarov dies in Soyuz 1 when its parachute fails to open. He is the first human to die during a space mission.
1967 – Vietnam War: American General William Westmoreland says in a news conference that the enemy had "gained support in the United States that gives him hope that he can win politically that which he cannot win militarily."
1968 – Mauritius becomes a member state of the United Nations.
1970 – The first Chinese satellite, Dong Fang Hong I, is launched.
1970 – The Gambia becomes a republic within the Commonwealth of Nations, with Dawda Jawara as the first President.
1971 – Soyuz 10 docks with Salyut 1.
1980 – Eight U.S. servicemen die in Operation Eagle Claw as they attempt to end the Iran hostage crisis.
1990 – STS-31: The Hubble Space Telescope is launched from the Space Shuttle Discovery.

Shuttle mission STS-31 lifts off, carrying Hubble into orbit.
1990 – Gruinard Island, Scotland, is officially declared free of the anthrax disease after 48 years of quarantine.
1993 – An IRA bomb devastates the Bishopsgate area of London.
1996 – In the United States, the Antiterrorism and Effective Death Penalty Act of 1996 is introduced.
2004 – The United States lifts economic sanctions imposed on Libya 18 years previously, as a reward for its cooperation in eliminating weapons of mass destruction.
2005 – Cardinal Joseph Ratzinger is inaugurated as the 265th Pope of the Roman Catholic Church taking the name Pope Benedict XVI.
2005 – Snuppy, the world's first cloned dog, is born in South Korea.
2006 – King Gyanendra of Nepal gives into the demands of protesters and restores the parliament that he dissolved in 2002.

Holidays and observances

Christian Feast Day:
Ecgberht of Ripon
Fidelis of Sigmaringen
Mellitus
Wilfrid (Anglican Church)
April 24 (Eastern Orthodox liturgics)
Concord Day (Niger)
Democracy Day (Nepal)
Earliest day on which National Arbor Day can fall, while April 30 is the latest; celebrated on the last Friday in April. (United States)
Earliest day on which Turkmen Racing Horse Festival can fall, while April 30 is the latest; celebrated on the last Sunday in April. (Turkmenistan)
Genocide Remembrance Day (Armenia)
Kapyong Day (Australia)
Republic Day (The Gambia)
World Day for Laboratory Animals (UN recognized)