The temperature on September 19, 1936 was between 10.1 °C and 19.8 °C and averaged 13.9 °C. There was 3.3 hours of sunshine (26%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south east. Source: KNMI
May 5 » Italian troops occupy Addis Ababa, Ethiopia.
June 26 » Initial flight of the Focke-Wulf Fw 61, the first practical helicopter.
November 30 » In London, the Crystal Palace is destroyed by fire.
December 5 » The Soviet Union adopts a new constitution and the Kirghiz Soviet Socialist Republic is established as a full Union Republic of the USSR.
December 21 » First flight of the Junkers Ju 88 multi-role combat aircraft.
December 23 » Spanish Civil War: The Spanish Republic legalizes the Regional Defence Council of Aragon.
Day of marriage January 9, 1970
The temperature on January 9, 1970 was between -1.0 °C and 3.4 °C and averaged 0.9 °C. There was 4.9 mm of rain during 3.7 hours. The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
May 1 » Vietnam War: Protests erupt following the announcement by Richard Nixon that the U.S. and South Vietnamese forces would attack Vietnamese communists in a Cambodian Campaign.
June 11 » After being appointed on May 15, Anna Mae Hays and Elizabeth P. Hoisington officially receive their ranks as U.S. Army Generals, becoming the first women to do so.
August 17 » Venera program: Venera 7 launched. It will later become the first spacecraft to successfully transmit data from the surface of another planet (Venus).
September 6 » Two passenger jets bound from Europe to New York are simultaneously hijacked by Palestinian terrorist members of the PFLP and taken to Dawson's Field, Jordan.
November 25 » In Japan, author Yukio Mishima and one compatriot commit ritualistic seppuku after an unsuccessful coup attempt.
Day of death July 24, 1990
The temperature on July 24, 1990 was between 9.5 °C and 18.1 °C and averaged 14.7 °C. There was 0.1 hours of sunshine (1%). The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northwest. Source: KNMI
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
March 15 » Mikhail Gorbachev is elected as the first President of the Soviet Union.
March 19 » The ethnic clashes of Târgu Mureș begin four days after the anniversary of the Revolutions of 1848 in the Austrian Empire.
March 28 » United States President George H. W. Bush posthumously awards Jesse Owens the Congressional Gold Medal.
April 7 » Iran–Contra affair: John Poindexter is found guilty of five charges for his part in the scandal (the conviction is later reversed on appeal).
April 12 » Jim Gary's "Twentieth Century Dinosaurs" exhibition opens at the Smithsonian Institution National Museum of Natural History in Washington, D.C. He is the only sculptor ever invited to present a solo exhibition there.
November 14 » After German reunification, the Federal Republic of Germany and Poland sign a treaty confirming the Oder–Neisse line as the border between Germany and Poland.
When copying data from this family tree, please include a reference to the origin: Van Knippenberg, "Family tree Van Knippenberg", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-knippenberg/I23.php : accessed February 24, 2026), "Dr. Petrus Hubertus (Piet) van Knippenberg (1936-1990)".
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