About April 20

April 20, 2025 is the 110th day of the year 2025 in the Gregorian calendar. There are 255 days remaining until the end of this year. The day of the week is Sunday.

You can browse the full year calendar in case you need it.

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Aries is the sun sign of a person born on this day. Diamond is the modern birthstone for this month. Opal is the mystical birthstone from Tibetan origin that dates back over a thousand years.

According to the lunisolar Chinese calendar, there are 303 days remaining before the start of the next Chinese New Year.

What Happened On April 20

  • 1453
    The last naval battle in Byzantine history occurs, as three Genoese galleys escorting a Byzantine transport fight their way through the huge Ottoman blockade fleet and into the Golden Horn.
  • 1526
    The last ruler of the Lodi Dynasty, Ibrahim Lodi is defeated and killed by Babur in the First Battle of Panipat.
  • 1653
    Oliver Cromwell dissolves the Rump Parliament.
  • 1657
    Freedom of religion is granted to the Jews of New Amsterdam (later New York City).
  • 1770
    The Georgian king Erekle II, abandoned by his Russian ally Count Totleben, wins a victory over Ottoman forces at Aspindza.
  • 1809
    Two Austrian army corps in Bavaria are defeated by a First French Empire army led by Napoleon I of France at the Battle of Abensberg on the second day of a four day campaign that ended in a French victory.
  • 1818
    The case of Ashford v Thornton ends, with Abraham Thornton allowed to go free rather than face a retrial for murder, after his demand for trial by battle is upheld.
  • 1861
    American Civil War: Robert E. Lee resigns his commission in the United States Army in order to command the forces of the state of Virginia.
  • 1862
    Louis Pasteur and Claude Bernard complete the first pasteurization tests.
  • 1902
    Pierre and Marie Curie refine radium chloride.
  • 1908
    Opening day of competition in the New South Wales Rugby League.
  • 1912
    Opening day for baseball’s Tiger Stadium in Detroit, Michigan, and Fenway Park in Boston, Massachusetts.
  • 1926
    Western Electric and Warner Bros. announce Vitaphone, a process to add sound to film.
  • 1939
    Billie Holiday records the first Civil Rights song “Strange Fruit”.
  • 1946
    The League of Nations officially dissolves, giving most of its power to the United Nations.
  • 1961
    Failure of the Bay of Pigs Invasion of US-backed troops against Cuba.
  • 1968
    English politician Enoch Powell makes his controversial Rivers of Blood speech.
  • 1986
    Pianist Vladimir Horowitz performs in his native Russia for the first time in 61 years.
  • 2007
    Johnson Space Center Shooting: A man with a handgun barricades himself in NASA’s Johnson Space Center in Houston, Texas before killing a male hostage and himself.
  • 2010
    The Deepwater Horizon oil well explodes in the Gulf of Mexico, killing eleven workers and beginning an oil spill that would last five months.

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