February 6 » The Permanent Court of Arbitration, an international arbitration court at The Hague, is created when the Senate of the Netherlands ratifies an 1899 peace conference decree.
February 9 » The Davis Cup competition is established.
February 18 » Second Boer War: Imperial forces suffer their worst single-day loss of life on Bloody Sunday, the first day of the Battle of Paardeberg.
June 5 » Second Boer War: British soldiers take Pretoria.
June 25 » The Taoist monk Wang Yuanlu discovers the Dunhuang manuscripts, a cache of ancient texts that are of great historical and religious significance, in the Mogao Caves of Dunhuang, China.
October 19 » Max Planck discovers Planck's law of black-body radiation.
Day of marriage May 18, 1923
The temperature on May 18, 1923 was between 2.1 °C and 11.6 °C and averaged 7.2 °C. There was 12.2 mm of rain. There was 3.2 hours of sunshine (20%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
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 9 » Lithuanian residents of the Memel Territory rebel against the League of Nations' decision to leave the area as a mandated region under French control.
January 11 » Occupation of the Ruhr: Troops from France and Belgium occupy the Ruhr area to force Germany to make its World War I reparation payments.
February 15 » Greece becomes the last European country to adopt the Gregorian calendar.
June 18 » Checker Taxi puts its first taxi on the streets.
October 16 » The Walt Disney Company is founded.
November 11 » Adolf Hitler was arrested in Munich for high treason for his role in the Beer Hall Putsch.
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/I136728.php : accessed October 23, 2026), "Voppe Slotegraaf (1900-)".
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