April 2 » "Electric Theatre", the first full-time movie theater in the United States, opens in Los Angeles.
April 2 » Dmitry Sipyagin, Minister of Interior of the Russian Empire, is assassinated in the Marie Palace, Saint Petersburg.
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.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
December 14 » The Commercial Pacific Cable Company lays the first Pacific telegraph cable, from San Francisco to Honolulu.
Day of marriage March 31, 1932
The temperature on March 31, 1932 was between 6.4 °C and 11.6 °C and averaged 8.2 °C. There was 5.3 mm of rain during 1.5 hours. There was 2.3 hours of sunshine (18%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
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.
April 5 » Dominion of Newfoundland: Ten thousand rioters seize the Colonial Building leading to the end of self-government.
September 23 » The unification of Saudi Arabia is completed.
September 24 » Gandhi and Dr. Ambedkar agree to the Poona Pact, which reserved seats in the Indian provincial legislatures for the "Depressed Classes" (Untouchables).
October 3 » Iraq gains independence from the United Kingdom.
December 10 » Thailand becomes a constitutional monarchy.
December 27 » Radio City Music Hall, "Showplace of the Nation", opens in New York City.
Day of death September 20, 1970
The temperature on September 20, 1970 was between 10.8 °C and 23.2 °C and averaged 15.7 °C. There was 0.1 mm of rain. There was 7.3 hours of sunshine (59%). The partly clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
January 12 » Biafra capitulates, ending the Nigerian Civil War.
April 6 » Newhall massacre: Four California Highway Patrol officers are killed in a shootout.
May 1 » Vietnam War: Protests erupt following the announcement by Richard Nixon that the U.S. and South Vietnamese forces would attack Vietnamese communists in a Cambodian Campaign.
September 30 » Jordan makes a deal with the PFLP for the release of the remaining hostages from the Dawson's Field hijackings.
November 14 » Southern Airways Flight 932 crashes in the mountains near Huntington, West Virginia, killing 75, including almost all of the Marshall University football team.
December 15 » Soviet spacecraft Venera 7 successfully lands on Venus. It is the first successful soft landing on another planet.
When copying data from this family tree, please include a reference to the origin: Hendrik de Graaf, "Family tree Plugboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plugboer/I12752.php : accessed January 29, 2026), "Jacob Hendrik Modder (1902-1970)".
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