January 18 » An X-ray generating machine is exhibited for the first time by H. L. Smith.
March 1 » Battle of Adwa: An Ethiopian army defeats an outnumbered Italian force, ending the First Italo-Ethiopian War.
March 1 » Henri Becquerel discovers radioactive decay.
April 15 » Closing ceremony of the Games of the I Olympiad in Athens, Greece.
May 26 » Nicholas II becomes the last Tsar of Imperial Russia.
June 15 » The deadliest tsunami in Japan's history kills more than 22,000 people.
Day of marriage March 17, 1921
The temperature on March 17, 1921 was between 2.2 °C and 15.1 °C and averaged 8.5 °C. There was 4.3 hours of sunshine (36%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
March 8 » Spanish Prime Minister Eduardo Dato Iradier is assassinated while exiting the parliament building in Madrid.
March 24 » The 1921 Women's Olympiad begins in Monte Carlo, first international women's sports event.
June 28 » Serbian King Alexander I proclaims the new constitution of the Kingdom of Serbs, Croats and Slovenes, known thereafter as the Vidovdan Constitution.
September 7 » In Atlantic City, New Jersey, the first Miss America Pageant, a two-day event, is held.
November 14 » The Communist Party of Spain is founded, and issues the first edition of Mundo obrero.
December 22 » Opening of Visva-Bharati College, also known as Santiniketan College, now Visva Bharati University, India.
Day of death April 16, 1952
The temperature on April 16, 1952 was between 7.3 °C and 20.3 °C and averaged 13.5 °C. There was 0.1 mm of rain. There was 10.7 hours of sunshine (77%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
May 7 » The concept of the integrated circuit, the basis for all modern computers, is first published by Geoffrey Dummer.
July 19 » Opening of the Summer Olympics in Helsinki, Finland.
July 23 » General Muhammad Naguib leads the Free Officers Movement (formed by Gamal Abdel Nasser, the real power behind the coup) in overthrowing King Farouk of Egypt.
August 11 » Hussein bin Talal is proclaimed King of Jordan.
November 14 » The first regular UK Singles Chart published by the New Musical Express.
December 20 » A United States Air Force C-124 crashes and burns in Moses Lake, Washington killing 87.
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/I218290.php : accessed October 24, 2026), "Heero Venema (1896-1952)".
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