The temperature on June 21, 1920 was between 10.6 °C and 21.1 °C and averaged 16.0 °C. There was 10.3 mm of rain. There was 7.2 hours of sunshine (43%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. 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.
February 20 » An earthquake kills between 114 and 130 in Georgia and heavily damages the town of Gori.
April 28 » Azerbaijan is added to the Soviet Union.
June 15 » Following the 1920 Schleswig plebiscites, Northern Schleswig is transferred from Germany to Denmark.
August 18 » The Nineteenth Amendment to the United States Constitution is ratified, guaranteeing women's suffrage.
August 25 » Polish–Soviet War: Battle of Warsaw, which began on August 13, ends with the Red Army's defeat.
Day of death September 12, 1981
The temperature on September 12, 1981 was between 11.3 °C and 21.1 °C and averaged 15.5 °C. There was 4.9 mm of rain during 1.3 hours. There was 3.9 hours of sunshine (30%). The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. 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.
In The Netherlands , there was from Friday, September 11, 1981 to Saturday, May 29, 1982 the cabinet Van Agt II, with Mr. A.A.M. van Agt (CDA) as prime minister.
January 10 » Salvadoran Civil War: The FMLN launches its first major offensive, gaining control of most of Morazán and Chalatenango departments
March 26 » Social Democratic Party (UK) is founded as a party.
May 13 » Mehmet Ali Ağca attempts to assassinate Pope John Paul II in St. Peter's Square in Rome. The Pope is rushed to the Agostino Gemelli University Polyclinic to undergo emergency surgery and survives.
May 25 » In Riyadh, the Gulf Cooperation Council is created between Bahrain, Kuwait, Oman, Qatar, Saudi Arabia and the United Arab Emirates.
September 18 » The Assemblée Nationale votes to abolish capital punishment in France.
December 11 » El Mozote massacre: Armed forces in El Salvador kill an estimated 900 civilians in an anti-guerrilla campaign during the Salvadoran Civil War.
When copying data from this family tree, please include a reference to the origin: Charles Olson, "Olson's Tree", database, Genealogy Online (https://www.genealogieonline.nl/olsons-tree/P4587.php : accessed May 1, 2025), "Mary Campbell Williamson (1920-1981)".
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