March 7 » The German liner SSKaiser Wilhelm der Grosse becomes the first ship to send wireless signals to shore.
April 14 » The Exposition Universelle begins.
April 30 » Hawaii becomes a territory of the United States, with Sanford B. Dole as governor.
May 24 » Second Boer War: The United Kingdom annexes the Orange Free State.
June 18 » Empress Dowager Cixi of China orders all foreigners killed, including foreign diplomats and their families.
June 20 » Boxer Rebellion: The Imperial Chinese Army begins a 55-day siege of the Legation Quarter in Beijing, China.
Day of marriage April 12, 1921
The temperature on April 12, 1921 was between 3.8 °C and 18.1 °C and averaged 11.3 °C. There was 12.0 hours of sunshine (88%). 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.
February 12 » Bolsheviks launch a revolt in Georgia as a preliminary to the Red Army invasion of Georgia.
February 27 » The International Working Union of Socialist Parties is founded in Vienna.
May 8 » The creation of the Communist Party of Romania.
August 3 » Major League Baseball Commissioner Kenesaw Mountain Landis confirms the ban of the eight Chicago Black Sox, the day after they were acquitted by a Chicago court.
September 7 » In Atlantic City, New Jersey, the first Miss America Pageant, a two-day event, is held.
When copying data from this family tree, please include a reference to the origin: Van Knippenberg, "Family tree Van Knippenberg", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-knippenberg/I1109.php : accessed January 30, 2026), "Johanna H. (Jeanne) Knippenberg (1900-1998)".
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