March 10 » French Huguenot Jean Calas, who had been wrongly convicted of killing his son, dies after being tortured by authorities; the event inspired Voltaire to begin a campaign for religious tolerance and legal reform.
May 22 » Sweden and Prussia sign the Treaty of Hamburg.
May 22 » Trevi Fountain is officially completed and inaugurated in Rome.
July 17 » Former emperor Peter III of Russia is murdered.
September 12 » The Sultanate of Sulu ceded Balambangan Island to the British East India Company
October 6 » Seven Years' War: The British Capture Manila from Spain and occupy it.
Day of marriage April 23, 1780
The temperature on April 23, 1780 was about 14.0 °C. There was 4 mm of rainWind direction mainly southwest. Weather type: zeer betrokken regen. Source: KNMI
May 19 » New England's Dark Day, an unusual darkening of the day sky, was observed over the New England states and parts of Canada.
May 29 » American Revolutionary War: At the Battle of Waxhaws, the British continue attacking after the Continentals lay down their arms, killing 113 and critically wounding all but 53 that remained.
September 23 » American Revolution: British Major John André is arrested as a spy by American soldiers exposing Benedict Arnold's change of sides.
October 10 » The Great Hurricane of 1780 kills 20,000–30,000 in the Caribbean.
November 4 » The Rebellion of Túpac Amaru II against Spanish rule in the Viceroyalty of Peru begins.
November 5 » French-American forces under Colonel LaBalme are defeated by Miami Chief Little Turtle.
When copying data from this family tree, please include a reference to the origin: DF020, "Family tree DeVries", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-devries/I96.php : accessed December 25, 2025), "Johanna Berendina Cramer (1762-????)".
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