May 7 » In Saint Petersburg, Russian scientist Alexander Stepanovich Popov demonstrates to the Russian Physical and Chemical Society his invention, the Popov lightning detector—a primitive radio receiver. In some parts of the former Soviet Union the anniversary of this day is celebrated as Radio Day.
August 31 » German Count Ferdinand von Zeppelin patents his navigable balloon.
September 3 » John Brallier becomes the first openly professional American football player, when he was paid US$10 by David Berry, to play for the Latrobe Athletic Association in a 12-0 win over the Jeanette Athletic Association.
November 5 » George B. Selden is granted the first U.S. patent for an automobile.
November 28 » The first American automobile race takes place over the 54 miles from Chicago's Jackson Park to Evanston, Illinois. Frank Duryea wins in approximately 10 hours.
December 28 » The Lumière brothers perform for their first paying audience at the Grand Cafe in Boulevard des Capucines.
Day of marriage November 19, 1921
The temperature on November 19, 1921 was between 0.3 °C and 3.5 °C and averaged 2.6 °C. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-southeast. 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.
January 16 » The Marxist Left in Slovakia and the Transcarpathian Ukraine holds its founding congress in Ľubochňa.
February 15 » Kingdom of Romania establishes its legation in Helsinki.
February 25 » Georgian capital Tbilisi falls to the invading Russian forces after heavy fighting and the Russians declare the Georgian Soviet Socialist Republic.
August 28 » The Red Army dissolved the Free Territory, after driving the Black Army out of Ukraine.
October 19 » The Portuguese Prime Minister and several officials are murdered in the Bloody Night coup.
November 4 » Japanese Prime Minister Hara Takashi is assassinated in Tokyo.
Day of death February 11, 1971
The temperature on February 11, 1971 was between -2.2 °C and 6.7 °C and averaged 2.1 °C. There was 0.1 mm of rain. There was 4.7 hours of sunshine (49%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
January 21 » The current Emley Moor transmitting station, the tallest free-standing structure in the United Kingdom, begins transmitting UHF broadcasts.
January 31 » Apollo program: Apollo 14: Astronauts Alan Shepard, Stuart Roosa, and Edgar Mitchell, aboard a Saturn V, lift off for a mission to the Fra Mauro Highlands on the Moon.
February 27 » Doctors in the first Dutch abortion clinic (the Mildredhuis in Arnhem) start performing artificially-induced abortions.
November 6 » The United States Atomic Energy Commission tests the largest U.S. underground hydrogen bomb, code-named Cannikin, on Amchitka Island in the Aleutians.
December 4 » The PNS Ghazi, a submarine belonging to the Pakistan Navy, sinks during the course of the Indo-Pakistani Naval War of 1971.
December 16 » The United Kingdom recognizes Bahrain's independence, which is commemorated annually as Bahrain's National Day.
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/I133082.php : accessed October 22, 2026), "Wobbe de Vries (1895-1971)".
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