April 14 » James Cash Penney opens his first store in Kemmerer, Wyoming.
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.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
October 24 » Guatemala's Santa María Volcano begins to erupt, becoming the third-largest eruption of the 20th century.
December 14 » The Commercial Pacific Cable Company lays the first Pacific telegraph cable, from San Francisco to Honolulu.
Day of marriage December 18, 1929
The temperature on December 18, 1929 was between -2.6 °C and 5.3 °C and averaged 0.6 °C. There was 0.1 mm of rain. There was 6.2 hours of sunshine (80%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south. 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.
April 8 » Indian independence movement: At the Delhi Central Assembly, Bhagat Singh and Batukeshwar Dutt throw handouts and bombs to court arrest.
May 1 » The 7.2 Mw Kopet Dag earthquake shakes the Iran–Turkmenistan border region with a maximum Mercalli intensity of IX (Violent), killing up to 3,800 and injuring 1,121.
June 8 » Margaret Bondfield is appointed Minister of Labour. She is the first woman appointed to the Cabinet of the United Kingdom.
November 18 » Grand Banks earthquake: Off the south coast of Newfoundland in the Atlantic Ocean, a Richter magnitude 7.2 submarine earthquake, centered on the Grand Banks, breaks 12 submarine transatlantic telegraph cables and triggers a tsunami that destroys many south coast communities in the Burin Peninsula.
When copying data from this family tree, please include a reference to the origin: Jos Simons, "Family tree Simons", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-simons/I356.php : accessed February 22, 2026), "Johannes Adrianus Simons (1902-)".
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