March 18 » AFC Ajax Amsterdam, The Netherlands's biggest and most successful football club, was founded.
April 5 » Archaeologists in Knossos, Crete, discover a large cache of clay tablets with hieroglyphic writing in a script they call Linear B.
May 26 » Thousand Days' War: The Colombian Conservative Party turns the tide of war in their favor with victory against the Colombian Liberal Party in the Battle of Palonegro.
June 18 » Empress Dowager Cixi of China orders all foreigners killed, including foreign diplomats and their families.
July 9 » The Federation of Australia is given royal assent.
October 19 » Max Planck discovers Planck's law of black-body radiation.
Day of marriage December 18, 1922
The temperature on December 18, 1922 was between -0.2 °C and 8.0 °C and averaged 4.0 °C. There was 3.3 mm of rain. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-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.
In The Netherlands , there was from September 19, 1922 to August 4, 1925 the cabinet Ruys de Beerenbrouck II, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 28 » Knickerbocker Storm, Washington D.C.'s biggest snowfall, causes the city's greatest loss of life when the roof of the Knickerbocker Theatre collapses.
April 16 » The Treaty of Rapallo, pursuant to which Germany and the Soviet Union re-establish diplomatic relations, is signed.
May 30 » The Lincoln Memorial is dedicated in Washington, D.C..
September 27 » King Constantine I of Greece abdicates his throne in favor of his eldest son, George II.
October 27 » A referendum in Rhodesia rejects the country's annexation to the South African Union.
December 7 » The Parliament of Northern Ireland votes to remain a part of the United Kingdom and not unify with Southern Ireland.
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/I62966.php : accessed October 25, 2026), "Roelof de Boer (1900-)".
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