February 1 » Fountains Valley, Pretoria, the oldest nature reserve in Africa, is proclaimed by President Paul Kruger.
March 15 » Heian Shrine is founded.
April 8 » In Pollock v. Farmers' Loan & Trust Co. the Supreme Court of the United States declares unapportioned income tax to be unconstitutional.
June 20 » The Kiel Canal, crossing the base of the Jutland peninsula and the busiest artificial waterway in the world, is officially opened.
November 8 » While experimenting with electricity, Wilhelm Röntgen discovers the X-ray.
November 27 » At the Swedish–Norwegian Club in Paris, Alfred Nobel signs his last will and testament, setting aside his estate to establish the Nobel Prize after he dies.
Day of marriage May 25, 1921
The temperature on May 25, 1921 was between 10.8 °C and 29.0 °C and averaged 20.1 °C. There was 12.9 hours of sunshine (80%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the 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 16 » The Marxist Left in Slovakia and the Transcarpathian Ukraine holds its founding congress in Ľubochňa.
February 21 » Constituent Assembly of the Democratic Republic of Georgia adopts the country's first constitution.
February 27 » The International Working Union of Socialist Parties is founded in Vienna.
March 18 » The Kronstadt rebellion is suppressed by the Red Army.
July 27 » Researchers at the University of Toronto, led by biochemist Frederick Banting, prove that the hormone insulin regulates blood sugar.
November 4 » The Saalschutz Abteilung (hall defense detachment) of the Nazi Party is renamed the Sturmabteilung (storm detachment) after a large riot in Munich.
When copying data from this family tree, please include a reference to the origin: Leo Eijskoot, "Family tree Eijskoot", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijskoot/I1597.php : accessed February 22, 2026), "Karel Lodewijk Vrijenhoek (1895-< 1989)".
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