The Anjala conspiracy is signed.

The Anjala conspiracy of 1788 was a scheme by disgruntled Swedish officers to end Gustav III's Russian War of 1788–1790. Declaring Finland an independent state was not a part of the original plot, but one of the conspirators Johan Anders Jägerhorn, who handed the note to Empress Catherine the Great, made such claims in Saint Petersburg.

August 12 is the 224th day of the year in the Gregorian calendar; 141 days remain until the end of the year.