The temperature on April 14, 1890 was about 13.3 °C. The air pressure was 3 kgf/m2 and came mainly from the east. The airpressure was 75 cm mercury. The atmospheric humidity was 34%. Source: KNMI
January 1 » Eritrea is consolidated into a colony by the Italian government.
January 22 » The United Mine Workers of America is founded in Columbus, Ohio.
April 14 » The Pan-American Union is founded by the First International Conference of American States in Washington, D.C.
July 2 » The U.S. Congress passes the Sherman Antitrust Act.
July 10 » Wyoming is admitted as the 44th U.S. state.
December 30 » Following the Wounded Knee Massacre, the United States Army and Lakota warriors face off in the Drexel Mission Fight.
Day of death March 20, 1980
The temperature on March 20, 1980 was between -4.0 °C and 3.7 °C and averaged -0.6 °C. There was 9.8 hours of sunshine (81%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-northeast. 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.
May 14 » Salvadoran Civil War: the Sumpul River massacre occurs in Chalatenango, El Salvador.
June 3 » The 1980 Grand Island tornado outbreak hits Nebraska, causing five deaths and $300million (equivalent to $931million in 2019) worth of damage.
July 1 » "O Canada" officially becomes the national anthem of Canada.
July 8 » The inaugural 1980 State of Origin game is won by Queensland who defeat New South Wales 20–10 at Lang Park.
September 30 » Ethernet specifications are published by Xerox working with Intel and Digital Equipment Corporation.
October 17 » As part of the Holy See–United Kingdom relations a British monarch makes the first state visit to the Vatican.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I102529.php : accessed October 26, 2026), "Jeltje de Boer (1890-1980)".
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