January 5 » Dreyfus affair: French army officer Alfred Dreyfus is stripped of his rank and sentenced to life imprisonment on Devil's Island.
February 1 » Fountains Valley, Pretoria, the oldest nature reserve in Africa, is proclaimed by President Paul Kruger.
May 25 » Playwright, poet and novelist Oscar Wilde is convicted of "committing acts of gross indecency with other male persons" and sentenced to serve two years in prison.
October 4 » Horace Rawlins wins the first U.S. Open Men's Golf Championship.
October 21 » The Republic of Formosa collapses as Japanese forces invade.
November 8 » While experimenting with electricity, Wilhelm Röntgen discovers the X-ray.
Day of marriage May 12, 1921
The temperature on May 12, 1921 was between 9.2 °C and 21.1 °C and averaged 15.5 °C. There was 9.1 hours of sunshine (59%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-southeast. 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 16 » The Marxist Left in Slovakia and the Transcarpathian Ukraine holds its founding congress in Ľubochňa.
February 27 » The International Working Union of Socialist Parties is founded in Vienna.
June 12 » Mikhail Tukhachevsky orders the use of chemical weapons against the Tambov Rebellion, bringing an end to the peasant uprising.
June 28 » Serbian King Alexander I proclaims the new constitution of the Kingdom of Serbs, Croats and Slovenes, known thereafter as the Vidovdan Constitution.
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.
November 14 » The Communist Party of Spain is founded, and issues the first edition of Mundo obrero.
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/I53700.php : accessed February 18, 2026), "Hieke Kloosterman (1895-????)".
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