February 23 » Second Boer War: During the Battle of the Tugela Heights, the first British attempt to take Hart's Hill fails.
February 27 » The British Labour Party is founded.
April 5 » Archaeologists in Knossos, Crete, discover a large cache of clay tablets with hieroglyphic writing in a script they call Linear B.
May 17 » Second Boer War: British troops relieve Mafeking.
June 18 » Empress Dowager Cixi of China orders all foreigners killed, including foreign diplomats and their families.
October 19 » Max Planck discovers Planck's law of black-body radiation.
Day of marriage June 30, 1923
The temperature on June 30, 1923 was between 9.9 °C and 19.7 °C and averaged 13.4 °C. There was 1.0 hours of sunshine (6%). The average windspeed was 3 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.
February 10 » Texas Tech University is founded as Texas Technological College in Lubbock, Texas
February 16 » Howard Carter unseals the burial chamber of Pharaoh Tutankhamun.
August 16 » The United Kingdom gives the name "Ross Dependency" to part of its claimed Antarctic territory and makes the Governor-General of the Dominion of New Zealand its administrator.
August 18 » First British Track and Field championships for women, London.
September 8 » Honda Point disaster: Nine US Navy destroyers run aground off the California coast. Seven are lost, and twenty-three sailors killed.
November 8 » Beer Hall Putsch: In Munich, Adolf Hitler leads the Nazis in an unsuccessful attempt to overthrow the German government.
When copying data from this family tree, please include a reference to the origin: Michael Jacobs, "Family tree Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-michael-jacobs/I89258.php : accessed May 6, 2025), "Jan Veenstra (1900-)".
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