January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
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 15 » Philippine–American War: Filipino guerrillas launch a surprise attack on U.S. infantry and begin a four-day siege of Catubig, Philippines.
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 14 » The second German Naval Law calls for the Imperial German Navy to be doubled in size, resulting in an Anglo-German naval arms race.
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 11 » First use of insulin to treat diabetes in a human patient.
June 1 » The Royal Ulster Constabulary is founded.
July 11 » The Hollywood Bowl opens.
July 24 » The draft of the British Mandate of Palestine was formally confirmed by the Council of the League of Nations; it came into effect on 26 September 1923.
October 29 » King Victor Emmanuel III of Italy appoints Benito Mussolini as Prime Minister.
November 21 » Rebecca Latimer Felton of Georgia takes the oath of office, becoming the first female United States Senator.
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 15, 2026), "Roelof de Boer (1900-)".
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