The temperature on May 8, 1921 was between 9.0 °C and 18.1 °C and averaged 13.5 °C. There was 4.6 mm of rain. There was 1.2 hours of sunshine (8%). The average windspeed was 3 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.
March 17 » The Second Polish Republic adopts the March Constitution.
March 21 » The New Economic Policy is implemented by the Bolshevik Party in response to the economic failure as a result of war communism.
July 11 » The Red Army captures Mongolia from the White Army and establishes the Mongolian People's Republic.
October 26 » The Chicago Theatre opens.
October 29 » United States: Second trial of Sacco and Vanzetti in Boston, Massachusetts.
November 4 » Japanese Prime Minister Hara Takashi is assassinated in Tokyo.
Day of marriage December 3, 1942
The temperature on December 3, 1942 was between -1.9 °C and 5.2 °C and averaged 1.3 °C. There was 0.5 mm of rain during 0.6 hours. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
February 18 » World War II: The Imperial Japanese Army begins the systematic extermination of perceived hostile elements among the Chinese in Singapore.
April 8 » World War II: The Japanese take Bataan in the Philippines.
June 7 » World War II: Aleutian Islands Campaign: Imperial Japanese soldiers begin occupying the American islands of Attu and Kiska, in the Aleutian Islands off Alaska.
August 30 » World War II: The Battle of Alam el Halfa begins.
September 21 » The Boeing B-29 Superfortress makes its maiden flight.
November 4 » World War II: Disobeying a direct order by Adolf Hitler, General Field Marshal Erwin Rommel begins a retreat of his forces after a costly defeat during the Second Battle of El Alamein. The retreat would ultimately last five months.
Day of death December 22, 1986
The temperature on December 22, 1986 was between -3.8 °C and 2.5 °C and averaged -0.2 °C. There was -0.1 mm of rain. There was 2.6 hours of sunshine (34%). The partly 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 Thursday, November 4, 1982 to Monday, July 14, 1986 the cabinet Lubbers I, with Drs. R.F.M. Lubbers (CDA) as prime minister.
In The Netherlands , there was from Tuesday, November 4, 1986 to Tuesday, November 7, 1989 the cabinet Lubbers II, with Drs. R.F.M. Lubbers (CDA) as prime minister.
January 26 » The Ugandan government of Tito Okello is overthrown by the National Resistance Army, led by Yoweri Museveni.
February 8 » Hinton train collision: Twenty-three people are killed when a VIA Rail passenger train collides with a 118-car Canadian National freight train near the town of Hinton, Alberta, west of Edmonton. It is the worst rail accident in Canada until the Lac-Mégantic, Quebec derailment in 2013 which killed forty-seven people.
April 15 » The United States launches Operation El Dorado Canyon, its bombing raids against Libyan targets in response to a discotheque bombing in West Germany that killed two U.S. servicemen.
April 27 » The city of Pripyat and surrounding areas are evacuated due to Chernobyl disaster.
May 2 » Chernobyl disaster: The City of Chernobyl is evacuated six days after the disaster.
June 30 » The U.S. Supreme Court rules in Bowers v. Hardwick that states can outlaw homosexual acts between consenting adults.
When copying data from this family tree, please include a reference to the origin: Wicher Dam, "Dambomen, negen verschillende stambomen DAM", database, Genealogy Online (https://www.genealogieonline.nl/dambomen/I17898.php : accessed January 6, 2026), "Jan Koopen (1921-1986)".
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