January 8 » Herman Hollerith is issued US patent #395,791 for the 'Art of Applying Statistics' — his punched card calculator.
March 31 » The Eiffel Tower is officially opened.
May 6 » The Eiffel Tower is officially opened to the public at the Universal Exposition in Paris.
June 3 » The first long-distance electric power transmission line in the United States is completed, running 14 miles (23km) between a generator at Willamette Falls and downtown Portland, Oregon.
July 8 » The first issue of The Wall Street Journal is published.
July 11 » Tijuana, Mexico, is founded.
Day of marriage September 23, 1920
The temperature on September 23, 1920 was between 6.9 °C and 19.6 °C and averaged 12.5 °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.
January 16 » Zeta Phi Beta Sorority Incorporated was founded on the campus of Howard University.
January 28 » Foundation of the Spanish Legion.
February 2 » The Tartu Peace Treaty is signed between Estonia and Russia.
March 19 » The United States Senate rejects the Treaty of Versailles for the second time (the first time was on November 19, 1919).
August 18 » The Nineteenth Amendment to the United States Constitution is ratified, guaranteeing women's suffrage.
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 3 » A protest by agricultural workers in Baixa de Cassanje, Portuguese Angola, turns into a revolt, opening the Angolan War of Independence, the first of the Portuguese Colonial Wars.
January 27 » The Soviet submarine S-80 sinks when its snorkel malfunctions, flooding the boat.
April 30 » K-19, the first Soviet nuclear submarine equipped with nuclear missiles, is commissioned.
May 4 » American civil rights movement: The "Freedom Riders" begin a bus trip through the South.
May 31 » The South African Constitution of 1961 becomes effective, thus creating the Republic of South Africa, which remains outside the Commonwealth of Nations until 1 June 1994, when South Africa is returned to Commonwealth membership.
September 18 » U.N. Secretary-General Dag Hammarskjöld dies in an air crash while attempting to negotiate peace in the Katanga region of the Democratic Republic of the Congo.
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 April 30, 2025), "Petrus van Boekel (1889-1961)".
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