May 18 » The Seven Years' War begins when Great Britain declares war on France.
June 20 » A British garrison is imprisoned in the Black Hole of Calcutta.
July 30 » In Saint Petersburg, Bartolomeo Rastrelli presents the newly built Catherine Palace to Empress Elizabeth and her courtiers.
August 29 » Frederick the Great attacks Saxony, beginning the Seven Years' War in Europe.
September 8 » French and Indian War: Kittanning Expedition.
Day of marriage January 20, 1778
The temperature on January 20, 1778 was about 5.0 °C. Wind direction mainly southwest. Weather type: omtrent helder. Special wheather fenomena: noorderlicht. Source: KNMI
June 18 » American Revolutionary War: British troops abandon Philadelphia.
July 10 » American Revolution: Louis XVI of France declares war on the Kingdom of Great Britain.
August 21 » American Revolutionary War: British forces begin besieging the French outpost at Pondichéry.
September 17 » The Treaty of Fort Pitt is signed. It is the first formal treaty between the United States and a Native American tribe.
November 11 » Cherry Valley massacre: Loyalists and Seneca Indian forces attack a fort and village in eastern New York during the American Revolutionary War, killing more than forty civilians and soldiers.
December 29 » American Revolutionary War: Three thousand British soldiers under the command of Lieutenant Colonel Archibald Campbell capture Savannah, Georgia.
Day of burial July 31, 1787
The temperature on July 31, 1787 was about 13.0 °C. Wind direction mainly west by south. Weather type: betrokken. Source: KNMI
January 11 » William Herschel discovers Titania and Oberon, two moons of Uranus.
May 13 » Captain Arthur Phillip leaves Portsmouth, England, with eleven ships full of convicts (the "First Fleet") to establish a penal colony in Australia.
June 20 » Oliver Ellsworth moves at the Federal Convention to call the government the 'United States'.
August 6 » Sixty proof sheets of the Constitution of the United States are delivered to the Constitutional Convention in Philadelphia, Pennsylvania.
October 29 » Mozart's opera Don Giovanni receives its first performance in Prague.
December 18 » New Jersey becomes the third state to ratify the U.S. Constitution.
When copying data from this family tree, please include a reference to the origin: Gijsbertus Cornelis (Bert) Severijn, "Family tree Severijn", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-severijn/I18349.php : accessed February 16, 2026), "Willem Weijburg (1756-1787)".
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