February 14 » Voting machines are approved by the U.S. Congress for use in federal elections.
February 22 » Filipino forces led by General Antonio Luna launch counterattacks for the first time against the American forces during the Philippine–American War. The Filipinos fail to regain Manila from the Americans.
March 6 » Bayer registers "Aspirin" as a trademark.
May 8 » The Irish Literary Theatre in Dublin produced its first play.
July 17 » NEC Corporation is organized as the first Japanese joint venture with foreign capital.
September 23 » The American Asiatic Squadron destroys a Filipino battery at the Battle of Olongapo.
Day of marriage June 12, 1923
The temperature on June 12, 1923 was between 4.8 °C and 17.1 °C and averaged 11.7 °C. There was 1.2 mm of rain. There was 5.9 hours of sunshine (35%). 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.
February 10 » Texas Tech University is founded as Texas Technological College in Lubbock, Texas
February 15 » Greece becomes the last European country to adopt the Gregorian calendar.
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.
June 27 » Capt. Lowell H. Smith and Lt. John P. Richter perform the first ever aerial refueling in a DH.4B biplane.
August 18 » First British Track and Field championships for women, London.
When copying data from this family tree, please include a reference to the origin: Jan Kaper, "Family tree Kaper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaper/I67352.php : accessed February 9, 2026), "Pieter Wijngaard (1899-????)".
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