The temperature on June 6, 1911 was between 13.0 °C and 23.7 °C and averaged 18.3 °C. There was 13.7 hours of sunshine (83%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
January 5 » Kappa Alpha Psi, the world's third oldest and largest black fraternity, is founded at Indiana University.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
June 22 » Mexican Revolution: Government forces bring an end to the Magonista rebellion of 1911 in the Second Battle of Tijuana.
September 1 » The armored cruiser Georgios Averof is commissioned into the Greek Navy. It now serves as a museum ship.
September 7 » French poet Guillaume Apollinaire is arrested and put in jail on suspicion of stealing the Mona Lisa from the Louvre museum.
December 24 » Lackawanna Cut-Off railway line opens in New Jersey and Pennsylvania.
Day of marriage May 9, 1936
The temperature on May 9, 1936 was between 9.7 °C and 19.5 °C and averaged 14.2 °C. There was 0.1 mm of rain during 0.2 hours. There was 3.6 hours of sunshine (23%). The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
February 16 » The Popular Front wins the 1936 Spanish general election.
May 5 » Italian troops occupy Addis Ababa, Ethiopia.
May 26 » In the House of Commons of Northern Ireland, Tommy Henderson begins speaking on the Appropriation Bill. By the time he sits down in the early hours of the following morning, he had spoken for ten hours.
July 21 » Spanish Civil War: The Central Committee of Antifascist Militias of Catalonia is constituted, establishing an anarcho-syndicalist economy in Catalonia.
August 4 » Prime Minister of Greece Ioannis Metaxas suspends parliament and the Constitution and establishes the 4th of August Regime.
October 1 » Spanish Civil War: Francisco Franco is named head of the Nationalist government of Spain.
Day of death June 12, 1980
The temperature on June 12, 1980 was between 10.3 °C and 23.5 °C and averaged 17.6 °C. There was 11.3 hours of sunshine (68%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the ??. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
January 29 » The Rubik's Cube makes its international debut at the Ideal Toy Corp. in Earl's Court, London.
March 3 » The USSNautilus is decommissioned and stricken from the Naval Vessel Register.
April 18 » The Republic of Zimbabwe (formerly Rhodesia) comes into being, with Canaan Banana as the country's first President. The Zimbabwean dollar replaces the Rhodesian dollar as the official currency.
April 24 » Eight U.S. servicemen die in Operation Eagle Claw as they attempt to end the Iran hostage crisis.
June 1 » Cable News Network (CNN) begins broadcasting.
July 24 » The Quietly Confident Quartet of Australia wins the men's 4 x 100 metre medley relay at the Moscow Olympics, the only time the United States has not won the event at Olympic level.
When copying data from this family tree, please include a reference to the origin: Jaap van der Werff, "Family tree Van der Werff / Kooistra", database, Genealogy Online (https://www.genealogieonline.nl/van-der-werff-stamboom/I522335.php : accessed February 23, 2026), "Anne van der Werff (1911-1980)".
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