April 18 » The 7.5 Mw Guatemala earthquake shakes Guatemala with a maximum Mercalli intensity of VIII (Severe), killing between 800–2,000.
May 8 » In Martinique, Mount Pelée erupts, destroying the town of Saint-Pierre and killing over 30,000 people. Only a handful of residents survive the blast.
May 17 » Greek archaeologist Valerios Stais discovers the Antikythera mechanism, an ancient mechanical analog computer.
June 24 » King Edward VII of the United Kingdom develops appendicitis, delaying his coronation.
October 24 » Guatemala's Santa María Volcano begins to erupt, becoming the third-largest eruption of the 20th century.
December 28 » The Syracuse Athletic Club defeated the New York Philadelphians, 5–0, in the first indoor professional football game, which was held at Madison Square Garden.
Day of marriage July 12, 1929
The temperature on July 12, 1929 was between 15.6 °C and 27.6 °C and averaged 20.9 °C. There was 12.2 hours of sunshine (74%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northwest. Source: KNMI
In The Netherlands , there was from March 8, 1926 to August 10, 1929 the cabinet De Geer I, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 20 » The first full-length talking motion picture filmed outdoors, In Old Arizona, is released.
February 11 » Kingdom of Italy and the Vatican sign the Lateran Treaty.
February 14 » Saint Valentine's Day Massacre: Seven people, six of them gangster rivals of Al Capone's gang, are murdered in Chicago.
June 7 » The Lateran Treaty is ratified, bringing Vatican City into existence.
August 11 » Babe Ruth becomes the first baseball player to hit 500 home runs in his career with a home run at League Park in Cleveland, Ohio.
August 16 » The 1929 Palestine riots break out in Mandatory Palestine between Palestinian Arabs and Jews and continue until the end of the month. In total, 133 Jews and 116 Arabs are killed.
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/I199355.php : accessed February 10, 2026), "Trijntje Koops (1902-)".
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