April 25 » Spanish–American War: The United States declares war on Spain.
June 21 » The United States captures Guam from Spain. The few warning shots fired by the U.S. naval vessels are misinterpreted as salutes by the Spanish garrison, which was unaware that the two nations were at war.
July 8 » The death of crime boss Soapy Smith, killed in the Shootout on Juneau Wharf, releases Skagway, Alaska from his iron grip.
October 1 » The Vienna University of Economics and Business Administration is founded under the name k.u.k. Exportakademie.
October 14 » The steam ship SSMohegan sinks near the Lizard peninsula, Cornwall, killing 106.
December 26 » Marie and Pierre Curie announce the isolation of radium.
Day of marriage June 2, 1921
The temperature on June 2, 1921 was between 14.0 °C and 25.5 °C and averaged 18.9 °C. There was 3.3 mm of rain. There was 10.5 hours of sunshine (64%). 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.
January 20 » The British K-class submarine HMS K5 sinks in the English Channel; all 56 on board die.
March 31 » The Royal Australian Air Force is formed.
April 11 » Emir Abdullah establishes the first centralised government in the newly created British protectorate of Transjordan.
July 27 » Researchers at the University of Toronto, led by biochemist Frederick Banting, prove that the hormone insulin regulates blood sugar.
August 23 » British airship R-38 experiences structural failure over Hull in England and crashes in the Humber Estuary. Of her 49 British and American training crew, only four survive.
October 13 » Soviet republics sign the Treaty of Kars to formalize the borders between Turkey and the South Caucasus states.
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/I172350.php : accessed December 31, 2025), "Sieger Zuidersma (1898-????)".
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