February 7 » Second Boer War: British troops fail in their third attempt to lift the Siege of Ladysmith.
June 9 » Indian nationalist Birsa Munda dies of cholera in a British prison.
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.
June 20 » Baron Eduard Toll, leader of the Russian Polar Expedition of 1900, departs Saint Petersburg in Russia on the explorer ship Zarya, never to return.
October 9 » The Cook Islands become a territory of the United Kingdom.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
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.
March 20 » The Arts Club of Chicago hosts the opening of Pablo Picasso's first United States showing, entitled Original Drawings by Pablo Picasso, becoming an early proponent of modern art in the United States.
April 28 » Wembley Stadium is opened, named initially as the Empire Stadium.
August 2 » Vice President Calvin Coolidge becomes U.S. President upon the death of President Warren G. Harding.
October 6 » The Turkish National Movement enters Constantinople.
October 13 » Ankara becomes the capital of Turkey.
December 21 » United Kingdom and Nepal formally signed an agreement of friendship, called the Nepal–Britain Treaty of 1923, which superseded the Treaty of Sugauli signed in 1816.
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 20, 2026), "Voppe Slotegraaf (1900-)".
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