January 26 » The 8.7–9.2 Mw Cascadia earthquake takes place off the west coast of North America, as evidenced by Japanese records.
February 27 » The island of New Britain is discovered by Europeans.
February 28 » Today is followed by March 1 in Sweden, thus creating the Swedish calendar.
March 1 » Sweden introduces its own Swedish calendar, in an attempt to gradually merge into the Gregorian calendar, reverts to the Julian calendar on this date in 1712, and introduces the Gregorian calendar on this date in 1753.
Day of marriage May 19, 1730
The temperature on May 19, 1730 was about 22.0 °C. Wind direction mainly northeast. Weather type: betrokken onweer. Source: KNMI
March 11 » The signing of the Treaty of Mangalore brings the Second Anglo-Mysore War to an end.
April 9 » The Treaty of Paris, ratified by the United States Congress on January 14, 1784, is ratified by King George III of the Kingdom of Great Britain, ending the American Revolutionary War. Copies of the ratified documents are exchanged on May 12, 1784.
June 4 » Élisabeth Thible becomes the first woman to fly in an untethered hot air balloon. Her flight covers four kilometres in 45 minutes, and reached 1,500 metres altitude (estimated).
August 17 » Classical composer Luigi Boccherini receives a pay rise of 12000 reals from his employer, the Infante Luis, Count of Chinchón.
August 23 » Western North Carolina (now eastern Tennessee) declares itself an independent state under the name of Franklin; it is not accepted into the United States, and only lasts for four years.
October 22 » Russia founds a colony on Kodiak Island, Alaska.
When copying data from this family tree, please include a reference to the origin: W. van Soom, "Family tree Van Soom", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-soom/I58321.php : accessed February 28, 2026), "Joannes Mertens (-1784)".
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