The temperature on July 1, 1919 was between 7.2 °C and 13.7 °C and averaged 10.9 °C. There was 3.5 mm of rain. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. 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 5 » The German Workers' Party, which would become the Nazi Party, is founded in Munich.
March 2 » The first Communist International meets in Moscow.
September 4 » Mustafa Kemal Atatürk, who founded the Republic of Turkey, gathers a congress in Sivas to make decisions as to the future of Anatolia and Thrace.
November 7 » The first Palmer Raid is conducted on the second anniversary of the Russian Revolution. Over 10,000 suspected communists and anarchists are arrested in 23 U.S. cities.
November 11 » The Industrial Workers of the World attack an Armistice Day parade in Centralia, Washington, ultimately resulting in the deaths of five people.
December 26 » Babe Ruth of the Boston Red Sox is sold to the New York Yankees by owner Harry Frazee, allegedly establishing the Curse of the Bambino superstition.
Day of marriage November 11, 1949
The temperature on November 11, 1949 was between 6.9 °C and 12.0 °C and averaged 9.0 °C. There was 3.8 mm of rain during 4.3 hours. There was 2.6 hours of sunshine (29%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
March 30 » Cold War: A riot breaks out in Austurvöllur square in Reykjavík, when Iceland joins NATO.
March 31 » The Dominion of Newfoundland joins the Canadian Confederation and becomes the 10th Province of Canada.
April 18 » The Republic of Ireland Act comes into effect.
April 23 » Chinese Civil War: Establishment of the People's Liberation Army Navy.
August 22 » The Queen Charlotte earthquake is Canada's strongest since the 1700 Cascadia earthquake.
September 29 » The Communist Party of China writes the Common Programme for the future People's Republic of China.
Day of death May 7, 1985
The temperature on May 7, 1985 was between 9.2 °C and 20.6 °C and averaged 15.6 °C. There was -0.1 mm of rain. There was 0.6 hours of sunshine (4%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. 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.
March 11 » Mikhail Gorbachev is elected to the position of General Secretary of the Communist Party of the Soviet Union making Gorbachev the USSR's de facto, and last, head of state.
April 21 » The compound of the militant group The Covenant, The Sword, and the Arm of the Lord surrenders to federal authorities in Arkansas after a two-day government siege.
July 13 » Vice President George H. W. Bush becomes the Acting President for the day when President Ronald Reagan undergoes surgery to remove polyps from his colon.
November 9 » Garry Kasparov, 22, of the Soviet Union becomes the youngest World Chess Champion by beating fellow Soviet Anatoly Karpov.
November 15 » The Anglo-Irish Agreement is signed at Hillsborough Castle by British Prime Minister Margaret Thatcher and Irish Taoiseach Garret FitzGerald.
November 21 » United States Navy intelligence analyst Jonathan Pollard is arrested for spying after being caught giving Israel classified information on Arab nations. He is subsequently sentenced to life in prison.
When copying data from this family tree, please include a reference to the origin: Wim de Vries, "Family tree Kaempff", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaempff/I47.php : accessed January 22, 2026), "Willem Koopman (1919-1985)".
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