February 17 » In Sweden February 17 is followed by March 1 as the country moves from the Julian calendar to the Gregorian calendar.
May 1 » Publication of Species Plantarum by Linnaeus, and the formal start date of plant taxonomy adopted by the International Code of Botanical Nomenclature.
Day of marriage May 12, 1781
The temperature on May 12, 1781 was about 15.0 °C. Wind direction mainly south east. Weather type: omtrent helder. Special wheather fenomena: noorderlicht. Source: KNMI
February 18 » Fourth Anglo-Dutch War: Captain Thomas Shirley opens his expedition against Dutch colonial outposts on the Gold Coast of Africa (present-day Ghana).
August 5 » The Battle of Dogger Bank takes place.
September 28 » American Revolution: American forces backed by a French fleet begin the siege of Yorktown.
October 17 » American Revolutionary War: British General Charles, Earl Cornwallis surrenders at the Siege of Yorktown.
October 19 » American Revolutionary War: The siege of Yorktown comes to an end.
November 29 » The crew of the British slave ship Zong murders 133 Africans by dumping them into the sea to claim insurance.
When copying data from this family tree, please include a reference to the origin: R.A.Hemerik, "Descendants Hemerik-Broekhuizen-Huner-Koper-Barink", database, Genealogy Online (https://www.genealogieonline.nl/parenteel-hemerik/I107936.php : accessed February 9, 2026), "Maria Fris (1753-????)".
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