January 30 » The first Anglo-Japanese Alliance is signed in London.
February 27 » Second Boer War: Australian soldiers Harry "Breaker" Morant and Peter Handcock are executed in Pretoria after being convicted of war crimes.
March 7 » Second Boer War: Boers, led by Koos de la Rey, inflict the biggest defeat upon the British since the beginning of the war, at Tweebosch.
April 20 » Pierre and Marie Curie refine radium chloride.
June 24 » King Edward VII of the United Kingdom develops appendicitis, delaying his coronation.
November 21 » The Philadelphia Football Athletics defeated the Kanaweola Athletic Club of Elmira, New York, 39–0, in the first ever professional American football night game.
Day of marriage May 21, 1926
The temperature on May 21, 1926 was between 7.6 °C and 20.9 °C and averaged 14.7 °C. There was 8.2 hours of sunshine (51%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
March 14 » The El Virilla train accident, Costa Rica, kills 248 people and wounds another 93 when a train falls off a bridge over the Río Virilla between Heredia and Tibás.
June 28 » Mercedes-Benz is formed by Gottlieb Daimler and Karl Benz merging their two companies.
July 23 » Fox Film buys the patents of the Movietone sound system for recording sound onto film.
August 5 » Harry Houdini performs his greatest feat, spending 91 minutes underwater in a sealed tank before escaping.
September 8 » Germany is admitted to the League of Nations.
October 14 » The children's book Winnie-the-Pooh, by A. A. Milne, is first published.
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/I132460.php : accessed February 16, 2026), "Pieter Heemstra (1902-)".
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