April 2 » "Electric Theatre", the first full-time movie theater in the United States, opens in Los Angeles.
April 2 » Dmitry Sipyagin, Minister of Interior of the Russian Empire, is assassinated in the Marie Palace, Saint Petersburg.
April 20 » Pierre and Marie Curie refine radium chloride.
May 20 » Cuba gains independence from the United States. Tomás Estrada Palma becomes the country's first President.
August 22 » Cadillac Motor Company is founded.
October 24 » Guatemala's Santa María Volcano begins to erupt, becoming the third-largest eruption of the 20th century.
Day of death May 25, 1946
The temperature on May 25, 1946 was between 9.0 °C and 21.4 °C and averaged 15.2 °C. There was 7.3 hours of sunshine (45%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
From June 24, 1945 till July 3, 1946 the Netherlands had a cabinet Schermerhorn - Drees with the prime ministers Prof. ir. W. Schermerhorn (VDB) and W. Drees (PvdA).
In The Netherlands , there was from July 3, 1946 to August 7, 1948 the cabinet Beel I, with Dr. L.J.M. Beel (KVP) as prime minister.
January 19 » General Douglas MacArthur establishes the International Military Tribunal for the Far East in Tokyo to try Japanese war criminals.
February 1 » The Parliament of Hungary abolishes the monarchy after nine centuries, and proclaims the Hungarian Republic.
February 15 » ENIAC, the first electronic general-purpose computer, is formally dedicated at the University of Pennsylvania in Philadelphia.
May 21 » Physicist Louis Slotin is fatally irradiated in a criticality incident during an experiment with the demon core at Los Alamos National Laboratory.
May 25 » The parliament of Transjordan makes Abdullah I of Jordan their Emir.
June 27 » In the Canadian Citizenship Act, the Parliament of Canada establishes the definition of Canadian citizenship.
When copying data from this family tree, please include a reference to the origin: Tjitze Koster, "Family tree Koster Twijslerheide e.o.", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koster/I1989.php : accessed February 14, 2026), "Sikke Ritsema (1902-1946)".
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