January 24 » Second Boer War: Boers stop a British attempt to break the Siege of Ladysmith in the Battle of Spion Kop.
February 7 » Second Boer War: British troops fail in their third attempt to lift the Siege of Ladysmith.
February 9 » The Davis Cup competition is established.
February 27 » Fußball-Club Bayern München is founded.
March 16 » Sir Arthur Evans purchased the land around the ruins of Knossos, the largest Bronze Age archaeological site on Crete.
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.
April 16 » The Treaty of Rapallo, pursuant to which Germany and the Soviet Union re-establish diplomatic relations, is signed.
September 18 » The Kingdom of Hungary is admitted to the League of Nations.
October 18 » The British Broadcasting Company (later Corporation) is founded by a consortium, to establish a nationwide network of radio transmitters to provide a national broadcasting service.
October 28 » Italian fascists led by Benito Mussolini march on Rome and take over the Italian government.
December 6 » One year to the day after the signing of the Anglo-Irish Treaty, the Irish Free State comes into existence.
December 16 » President of Poland Gabriel Narutowicz is assassinated by Eligiusz Niewiadomski at the Zachęta Gallery in Warsaw.
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 20, 2026), "Roelof de Boer (1900-)".
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