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.
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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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