May 8 » The Irish Literary Theatre in Dublin produced its first play.
May 30 » Pearl Hart, a female outlaw of the Old West, robs a stage coach 30 miles southeast of Globe, Arizona.
June 7 » American Temperance crusader Carrie Nation begins her campaign of vandalizing alcohol-serving establishments by destroying the inventory in a saloon in Kiowa, Kansas.
December 2 » Philippine–American War: The Battle of Tirad Pass, termed "The Filipino Thermopylae", is fought.
December 11 » Second Boer War: In the Battle of Magersfontein the Boers commanded by general Piet Cronjé inflict a defeat on the forces of the British Empire commanded by Lord Methuen trying to relieve the Siege of Kimberley.
Day of death June 20, 1980
The temperature on June 20, 1980 was between 9.6 °C and 15.1 °C and averaged 12.4 °C. There was 13.6 mm of rain during 3.0 hours. There was 3.4 hours of sunshine (20%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. 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.
February 25 » The government of Suriname is overthrown by a military coup led by Dési Bouterse.
May 9 » In Florida, Liberian freighter MVSummit Venture collides with the Sunshine Skyway Bridge over Tampa Bay, making a 1,400-ft. section of the southbound span collapse. Thirty-five people in six cars and a Greyhound bus fall 150ft. into the water and die.
July 7 » Institution of sharia law in Iran.
September 30 » Ethernet specifications are published by Xerox working with Intel and Digital Equipment Corporation.
October 26 » The Peter Muhlenberg Memorial in Washington, D.C. is dedicated.
October 30 » El Salvador and Honduras agree to put the border dispute fought over in 1969's Football War before the International Court of Justice.
When copying data from this family tree, please include a reference to the origin: J Eijsermans, "Eijsermans family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijsermans/I310095.php : accessed March 10, 2026), "Joannes Cornelis Maria Verhoeven (1899-1980)".
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