August 21st (1810) was a Tuesday. It's the 233rd day of the year (234th in leap years) in the Gregorian calendar. There are 132 days left to the end of the year.
Historical Events for 21st August, 1810
» Charles XIV John of Sweden e.g Jean-Baptiste Bernadotte, Marshal of France, is elected Crown prince e.g Crown Prince of Sweden by the Swedish Riksdag of the Estates.