January 31 » Czechoslav Trade Union Association is founded in Prague.
April 18 » The Greco-Turkish War is declared between Greece and the Ottoman Empire.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
September 11 » After months of pursuit, generals of Menelik II of Ethiopia capture Gaki Sherocho, the last king of Kaffa, bringing an end to that ancient kingdom.
Day of marriage February 21, 1920
The temperature on February 21, 1920 was between 4.5 °C and 6.9 °C and averaged 5.2 °C. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
May 7 » Treaty of Moscow: Soviet Russia recognizes the independence of the Democratic Republic of Georgia only to invade the country six months later.
July 12 » The Soviet–Lithuanian Peace Treaty is signed, by which Soviet Russia recognizes the independence of Lithuania.
August 16 » Polish–Soviet War: The Battle of Radzymin concludes; the Soviet Red Army is forced to turn away from Warsaw.
August 19 » The Tambov Rebellion breaks out, in response to the Bolshevik policy of Prodrazvyorstka.
August 20 » The National Football League is organized as the American Professional Football Conference in Canton, Ohio
September 16 » The Wall Street bombing: A bomb in a horse wagon explodes in front of the J. P. Morgan building in New York City killing 38 and injuring 400.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I108970.php : accessed October 18, 2026), "Janke de Jong (1897-????)".
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