About August 21

August 21, 2025 is the 233rd day of the year 2025 in the Gregorian calendar. There are 132 days remaining until the end of this year. The day of the week is Thursday.

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 180 days remaining before the start of the next Chinese New Year.

What Happened On August 21

  • 1331
    King Stephen Uroš III, after months of anarchy, surrenders to his son and rival Stephen Dušan, who succeeds as King of Serbia.
  • 1680
    Pueblo Indians capture Santa Fe from Spanish during the Pueblo Revolt.
  • 1689
    The Battle of Dunkeld in Scotland.
  • 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.
  • 1808
    Battle of Vimeiro: British and Portuguese forces led by General Arthur Wellesley defeat French force under Major-General Jean-Andoche Junot near the village of Vimeiro, Portugal, the first Anglo-Portuguese victory of the Peninsular War.
  • 1810
    Jean-Baptiste Bernadotte, Marshal of France, is elected Crown Prince of Sweden by the Swedish Riksdag of the Estates.
  • 1852
    Tlingit Indians destroy Fort Selkirk, Yukon Territory.
  • 1863
    Lawrence, Kansas is destroyed by Confederate guerrillas Quantrill’s Raiders in the Lawrence Massacre.
  • 1918
    World War I: The Second Battle of the Somme begins.
  • 1942
    World War II: a Nazi flag is installed atop the Mount Elbrus.
  • 1944
    Dumbarton Oaks Conference, prelude to the United Nations, begins.
  • 1944
    World War II: Canadian and Polish units capture the strategically important town of Falaise, France.
  • 1945
    Physicist Harry K. Daghlian, Jr. is fatally irradiated in a criticality incident during an experiment with the Demon core at Los Alamos National Laboratory.
  • 1963
    Xa Loi Pagoda raids: the Army of the Republic of Vietnam Special Forces loyal to Ngo Dinh Nhu, brother of President Ngo Dinh Diem, vandalises Buddhist pagodas across the country, arresting thousands and leaving an estimated hundreds dead.
  • 1976
    Operation Paul Bunyan at Panmunjeom, Korea.
  • 1979
    Soviet dancer Alexander Godunov defects to the United States.
  • 1986
    Carbon dioxide gas erupts from volcanic Lake Nyos in Cameroon, killing up to 1,800 people within a 20-kilometer range.
  • 1991
    Coup attempt against Mikhail Gorbachev collapses.
  • 1991
    Latvia declares renewal of its full independence after the occupation of Soviet Union.
  • 1992
    Ruby Ridge Standoff in Idaho

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