About December 20

December 20, 2021 is the 354th day of the year 2021 in the Gregorian calendar. There are 11 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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Sagittarius is the sun sign of a person born on this day. Turquoise is the modern birthstone for this month. Onyx is the mystical birthstone from Tibetan origin that dates back over a thousand years.

According to the lunisolar Chinese calendar, there are 43 days remaining before the start of the next Chinese New Year.

What Happened On December 20

  • 217
    The papacy of Zephyrinus ends. Callixtus I is elected as the sixteenth pope, but is opposed by the theologian Hippolytus who accuses him of laxity and of being a Modalist, one who denies any distinction between the three persons of the Trinity.
  • 1192
    Richard the Lion-Heart is captured and imprisoned by Leopold V of Austria on his way home to England after signing a treaty with Saladin ending the Third crusade.
  • 1522
    Siege of Rhodes: Suleiman the Magnificent accepts the surrender of the surviving Knights of Rhodes, who are allowed to evacuate. They eventually settle on Malta and become known as the Knights of Malta.
  • 1803
    The Louisiana Purchase is completed at a ceremony in New Orleans.
  • 1808
    Peninsular War: The Siege of Zaragoza begins.
  • 1860
    South Carolina becomes the first state to attempt to secede from the United States.
  • 1915
    World War I: Last Australian troops evacuated from Gallipoli.
  • 1942
    World War II: Bombing of Calcutta by the Japanese.
  • 1951
    The EBR-1 in Arco, Idaho becomes the first nuclear power plant to generate electricity. The electricity powered four light bulbs.
  • 1959
    The Walker family murders are committed.
  • 1960
    National Front for the Liberation of Vietnam is formed.
  • 1968
    The Zodiac Killer kills Betty Lou Jenson and David Faraday in Vallejo, California.
  • 1973
    The Spanish Prime Minister, Admiral Luis Carrero Blanco, is assassinated by a car bomb attack in Madrid.
  • 1984
    The Summit tunnel fire is the largest underground fire in history, as a freight train carrying over 1 million litres of petrol derails near the town of Todmorden in the Pennines.
  • 1987
    History’s worst peacetime sea disaster, when the passenger ferry Doña Paz sinks after colliding with the oil tanker Vector 1 in the Tablas Strait in the Philippines, killing an estimated 4,000 people (1,749 official).
  • 1995
    American Airlines Flight 965, a Boeing 757, crashes into a mountain 50 km north of Cali, Colombia killing 160.
  • 1999
    Macau is handed over to the People’s Republic of China by Portugal.
  • 2004
    A gang of thieves steal £26.5 million worth of currency from the Donegall Square West headquarters of Northern Bank in Belfast, Northern Ireland, one of the largest bank robberies in UK history.
  • 2005
    In Durrës, Albania was founded Aleksander Moisiu University.
  • 2005
    US District Court Judge John E. Jones III rules against mandating the teaching of “intelligent design” in his ruling of Kitzmiller v. Dover Area School District.

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