January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
January 16 » The United States Senate accepts the Anglo-German treaty of 1899 in which the United Kingdom renounces its claims to the Samoan islands.
February 7 » Second Boer War: British troops fail in their third attempt to lift the Siege of Ladysmith.
May 17 » Second Boer War: British troops relieve Mafeking.
October 19 » Max Planck discovers Planck's law of black-body radiation.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of marriage June 13, 1923
The temperature on June 13, 1923 was between 9.9 °C and 16.1 °C and averaged 12.2 °C. There was 3.8 mm of rain. There was 0.3 hours of sunshine (2%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west. 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.
March 3 » TIME magazine is published for the first time.
April 18 » Yankee Stadium: "The House that Ruth Built" opens.
September 29 » The British Mandate for Palestine takes effect, creating Mandatory Palestine.
October 6 » The Turkish National Movement enters Constantinople.
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/I97028.php : accessed December 25, 2025), "Albert Mebius (1900-)".
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