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.
June 20 » The Kiel Canal, crossing the base of the Jutland peninsula and the busiest artificial waterway in the world, is officially opened.
June 27 » The inaugural run of the Baltimore and Ohio Railroad's Royal Blue from Washington, D.C., to New York City, the first U.S. passenger train to use electric locomotives.
October 21 » The Republic of Formosa collapses as Japanese forces invade.
October 22 » In Paris an express train derails after overrunning the buffer stop, crossing almost 30 metres (100ft) of concourse before crashing through a wall and falling 10 metres (33ft) to the road below.
Day of marriage May 6, 1920
The temperature on May 6, 1920 was between 7.7 °C and 14.3 °C and averaged 10.5 °C. There was 3.8 mm of rain. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. 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.
February 13 » The Negro National League is formed.
February 24 » Nancy Astor becomes the first woman to speak in the House of Commons of the United Kingdom following her election as a Member of Parliament (MP) three months earlier.
May 2 » The first game of the Negro National League baseball is played in Indianapolis.
May 7 » Treaty of Moscow: Soviet Russia recognizes the independence of the Democratic Republic of Georgia only to invade the country six months later.
May 29 » The Louth flood of 1920 was a severe flash flooding in the Lincolnshire market town of Louth which occurred 29 May 1920, resulting in 23 fatalities in 20 minutes. It has been described as one of the most significant flood disasters in Britain during the 20th century.
July 12 » The Soviet–Lithuanian Peace Treaty is signed, by which Soviet Russia recognizes the independence of Lithuania.
Day of death December 9, 1971
The temperature on December 9, 1971 was between 2.1 °C and 9.2 °C and averaged 5.9 °C. There was 2.2 mm of rain during 7.5 hours. The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
January 2 » The second Ibrox disaster kills 66 fans at a Rangers-Celtic association football (soccer) match.
February 21 » The Convention on Psychotropic Substances is signed at Vienna.
March 7 » Sheikh Mujibur Rahman, political leader of then East Pakistan (present day-Bangladesh), delivers his historic 7th March speech in the Racecourse Field (Now Suhrawardy Udyan) in Dhaka.
May 31 » In accordance with the Uniform Monday Holiday Act passed by the U.S. Congress in 1968, observation of Memorial Day occurs on the last Monday in May for the first time, rather than on the traditional Memorial Day of May 30.
August 1 » The Concert for Bangladesh, organized by former Beatle George Harrison, is held at Madison Square Garden in New York City.
December 3 » Indo-Pakistani War of 1971: Pakistan launches a pre-emptive strike against India and a full-scale war begins.
When copying data from this family tree, please include a reference to the origin: J. van Broekhoven, "Database Van Broekhoven", database, Genealogy Online (https://www.genealogieonline.nl/database-van-broekhoven/I41486.php : accessed February 24, 2026), "Petronella van Geffen (1895-1971)".
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