February 7 » A Chinese immigrant in San Francisco falls ill to bubonic plague in the first plague epidemic in the continental United States.
February 28 » The Second Boer War: The 118-day "Siege of Ladysmith" is lifted.
March 13 » British forces occupy Bloemfontein, Orange Free State, during the Second Boer War.
May 24 » Second Boer War: The United Kingdom annexes the Orange Free State.
July 27 » Kaiser Wilhelm II makes a speech comparing Germans to Huns; for years afterwards, "Hun" would be a disparaging name for Germans.
September 13 » Filipino insurgents defeat a small American column in the Battle of Pulang Lupa, during the Philippine–American War.
Day of marriage June 30, 1923
The temperature on June 30, 1923 was between 9.5 °C and 19.0 °C and averaged 13.2 °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.
January 1 » Britain's Railways are grouped into the Big Four: LNER, GWR, SR, and LMS.
July 24 » The Treaty of Lausanne, settling the boundaries of modern Turkey, is signed in Switzerland by Greece, Bulgaria and other countries that fought in World War I.
August 23 » Captain Lowell Smith and Lieutenant John P. Richter performed the first mid-air refueling on De Havilland DH-4B, setting an endurance flight record of 37 hours.
September 7 » The International Criminal Police Organization (INTERPOL) is formed.
October 15 » The German Rentenmark is introduced in Germany to counter hyperinflation in the Weimar Republic.
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» United Kingdom and Nepal formally signed an agreement of friendship, called the Nepal–Britain Treaty of 1923, which superseded the Treaty of Sugauli signed in 1816.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: Michael Jacobs, "Family tree Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-michael-jacobs/I89258.php : accessed February 23, 2026), "Jan Veenstra (1900-)".
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