About August 21

August 21, 2023 is the 233rd day of the year 2023 in the Gregorian calendar. There are 132 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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Leo is the sun sign of a person born on this day. Peridot is the modern birthstone for this month. Diamond is the mystical birthstone from Tibetan origin that dates back over a thousand years.

According to the lunisolar Chinese calendar, there are 173 days remaining before the start of the next Chinese New Year.

What Happened On August 21

  • 1192
    Minamoto Yoritomo becomes Seii Tai Shōgun and the de facto ruler of Japan. (Traditional Japanese date: July 12, 1192)
  • 1331
    King Stephen Uroš III, after months of anarchy, surrenders to his son and rival Stephen Dušan, who succeeds as King of Serbia.
  • 1689
    The Battle of Dunkeld in Scotland.
  • 1770
    James Cook formally claims eastern Australia for Great Britain, naming it New South Wales.
  • 1772
    King Gustav III completes his coup d'état by adopting a new Constitution, ending half a century of parliamentary rule in Sweden and installing himself as an enlightened despot.
  • 1810
    Jean-Baptiste Bernadotte, Marshal of France, is elected Crown Prince of Sweden by the Swedish Riksdag of the Estates.
  • 1831
    Nat Turner leads black slaves and free blacks in a rebellion.
  • 1863
    Lawrence, Kansas is destroyed by Confederate guerrillas Quantrill’s Raiders in the Lawrence Massacre.
  • 1879
    The Virgin Mary, along with St. Joseph and St. John the Evangelist, reportedly appears at Knock Shrine in Knock, County Mayo, Ireland.
  • 1888
    The first successful adding machine in the United States is patented by William Seward Burroughs.
  • 1911
    The Mona Lisa is stolen by a Louvre employee.
  • 1968
    James Anderson, Jr. posthumously receives the first Medal of Honor to be awarded to an African American U.S. Marine.
  • 1968
    Soviet Union-dominated Warsaw Pact troops invade Czechoslovakia, crushing the Prague Spring; on the same day, Nicolae Ceauşescu, leader of Communist Romania, publicly condemns the Soviet maneuver, encouraging the Romanian population to arm itself against possible Soviet reprisals.
  • 1969
    An Australian, Michael Dennis Rohan, sets the Al-Aqsa Mosque on fire, a major catalyst of the formation of the Organisation of Islamic Cooperation.
  • 1971
    A bomb exploded in the Liberal Party campaign rally in Plaza Miranda, Manila, Philippines with several anti-Marcos political candidates injured.
  • 1979
    Soviet dancer Alexander Godunov defects to the United States.
  • 1982
    Lebanese Civil War: The first troops of a multinational force lands in Beirut to oversee the Palestine Liberation Organization’s withdrawal from Lebanon.
  • 1983
    Philippine opposition leader Benigno Aquino, Jr. is assassinated at the Manila International Airport (now renamed Ninoy Aquino International Airport).
  • 1993
    NASA loses contact with the Mars Observer spacecraft.
  • 2007
    Hurricane Dean makes its first landfall in Costa Maya, Mexico with winds at 165 mph. Dean is the first storm since Hurricane Andrew to make landfall as a Category 5.

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