About October 20

October 20, 2025 is the 293rd day of the year 2025 in the Gregorian calendar. There are 72 days remaining until the end of this year. The day of the week is Monday.

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

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

According to the lunisolar Chinese calendar, there are 120 days remaining before the start of the next Chinese New Year.

What Happened On October 20

  • 1720
    Caribbean pirate Calico Jack is captured by the Royal Navy.
  • 1818
    The Convention of 1818 signed between the United States and the United Kingdom which, among other things, settled the Canada – United States border on the 49th parallel for most of its length.
  • 1883
    Peru and Chile sign the Treaty of Ancón, by which the Tarapacá province is ceded to the latter, bringing an end to Peru’s involvement in the War of the Pacific.
  • 1904
    Chile and Bolivia sign the Treaty of Peace and Friendship, delimiting the border between the two countries.
  • 1917
    The Military Revolutionary Committee of the Petrograd Soviet, in charge of preparation and carrying out the Russian Revolution, holds its first meeting.
  • 1939
    Pope Pius XII publishes his first major encyclical entitled Summi Pontificatus.
  • 1941
    World War II: Thousands of civilians in Kragujevac in German-occupied Serbia are killed in the Kragujevac massacre.
  • 1943
    The cargo vessel Sinfra is attacked by Allied aircraft at Suda Bay, Crete, and sunk. 2,098 Italian prisoners of war drown with it.
  • 1944
    General Douglas MacArthur fulfills his promise to return to the Philippines when he commands an Allied assault on the islands, reclaiming them from the Japanese during the Second World War.
  • 1944
    Liquid natural gas leaks from storage tanks in Cleveland, then explodes; the explosion and resulting fire level 30 blocks and kill 130.
  • 1944
    The Soviet Army and Yugoslav Partisans liberate Belgrade, the capital of Yugoslavia
  • 1947
    The House Un-American Activities Committee begins its investigation into Communist infiltration of Hollywood, resulting in a blacklist that prevents some from working in the industry for years.
  • 1962
    China launches simultaneous offensives in Ladakh and across the McMahon Line, beginning the Sino-Indian War.
  • 1968
    Former First Lady Jacqueline Kennedy marries Greek shipping tycoon Aristotle Onassis.
  • 1970
    Siad Barre declares Somalia a socialist state.
  • 1971
    The Nepal Stock Exchange collapses.
  • 1973
    The Sydney Opera House opens.
  • 1981
    Two police officers and an armored car guard are killed during an armed robbery in Rockland County, NY, carried out by members of the Black Liberation Army and Weather Underground.
  • 1991
    A 6.8 Mw earthquake strikes the Uttarkashi region of India, killing more than 1,000 people.
  • 1991
    The Oakland Hills firestorm kills 25 and destroys 3,469 homes and apartments, causing more than $2 billion in damage.

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