January 8 » Herman Hollerith is issued US patent #395,791 for the 'Art of Applying Statistics' — his punched card calculator.
January 15 » The Coca-Cola Company, then known as the Pemberton Medicine Company, is incorporated in Atlanta.
April 1 » The University of Northern Colorado was established, as the Colorado State Normal School.
May 31 » Johnstown Flood: Over 2,200 people die after a dam fails and sends a 60-foot (18-meter) wall of water over the town of Johnstown, Pennsylvania.
August 4 » The Great Fire of Spokane, Washington destroys some 32 blocks of the city, prompting a mass rebuilding project.
November 14 » Pioneering female journalist Nellie Bly (aka Elizabeth Cochrane) begins a successful attempt to travel around the world in less than 80 days. She completes the trip in 72 days.
Day of marriage September 23, 1920
The temperature on September 23, 1920 was between 6.1 °C and 19.4 °C and averaged 12.4 °C. There was 0.2 mm of rain. There was 6.7 hours of sunshine (55%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. 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 20 » An earthquake kills between 114 and 130 in Georgia and heavily damages the town of Gori.
February 29 » Czechoslovak National Assembly adopts the Constitution.
March 12 » The Kapp Putsch begins when the Marinebrigade Ehrhardt is ordered to march on Berlin.
May 9 » Polish–Soviet War: The Polish army under General Edward Rydz-Śmigły celebrates its capture of Kiev with a victory parade on Khreshchatyk.
November 2 » In the United States, KDKA of Pittsburgh starts broadcasting as the first commercial radio station. The first broadcast is the result of the 1920 United States presidential election.
November 21 » Irish War of Independence: In Dublin, 31 people are killed in what became known as "Bloody Sunday".
Day of death July 21, 1961
The temperature on July 21, 1961 was between 12.9 °C and 15.8 °C and averaged 14.2 °C. There was 0.5 mm of rain during 0.9 hours. There was -0.1 hours of sunshine (0%). The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
January 25 » In Washington, D.C., President John F. Kennedy delivers the first live presidential television news conference.
February 16 » Explorer program: Explorer 9 (S-56a) is launched.
April 9 » The Pacific Electric Railway in Los Angeles, once the largest electric railway in the world, ends operations.
July 20 » French military forces break the Tunisian siege of Bizerte.
September 16 » The United States National Hurricane Research Project drops eight cylinders of silver iodide into the eyewall of Hurricane Esther. Wind speed reduces by 10%, giving rise to Project Stormfury.
October 1 » East and West Cameroon merge to form the Federal Republic of Cameroon.
When copying data from this family tree, please include a reference to the origin: Michael Jacobs, "Family tree Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-michael-jacobs/I5376.php : accessed February 24, 2026), "Petrus van Boekel (1889-1961)".
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