January 22 » The United Mine Workers of America is founded in Columbus, Ohio.
April 14 » The Pan-American Union is founded by the First International Conference of American States in Washington, D.C.
September 24 » The Church of Jesus Christ of Latter-day Saints officially renounces polygamy.
October 1 » Yosemite National Park is established by the U.S. Congress.
November 23 » King William III of the Netherlands dies without a male heir and a special law is passed to allow his daughter Princess Wilhelmina to succeed him.
December 15 » Hunkpapa Lakota leader Sitting Bull is killed on Standing Rock Indian Reservation, leading to the Wounded Knee Massacre.
Day of marriage May 12, 1920
The temperature on May 12, 1920 was between 11.3 °C and 23.5 °C and averaged 15.8 °C. There was 11.1 mm of rain. There was 3.0 hours of sunshine (19%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south. 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 13 » The Reichstag Bloodbath of January 13, 1920, the bloodiest demonstration in German history.
January 16 » The League of Nations holds its first council meeting in Paris, France.
January 17 » Alcohol Prohibition begins in the United States as the Volstead Act goes into effect.
February 29 » Czechoslovak National Assembly adopts the Constitution.
November 2 » In the United States, KDKA of Pittsburgh starts broadcasting as the first commercial radio station. The first broadcast is the result of the 1920 United States presidential election.
November 7 » Patriarch Tikhon of Moscow issues a decree that leads to the formation of the Russian Orthodox Church Outside Russia.
Day of death July 17, 1949
The temperature on July 17, 1949 was between 12.3 °C and 22.6 °C and averaged 17.4 °C. There was 0.9 mm of rain during 0.5 hours. There was 4.1 hours of sunshine (25%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southwest. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
When copying data from this family tree, please include a reference to the origin: Henk Hulzebos, "Family tree Hulzebos", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-hulzebos/I41.php : accessed February 16, 2026), "Pieter de Boer (1890-1949)".
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