The temperature on April 20, 1917 was between 4.1 °C and 10.4 °C and averaged 6.4 °C. There was 1.7 hours of sunshine (12%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
March 16 » World War I: A German auxiliary cruiser is sunk in the Action of 16 March 1917.
April 12 » World War I: Canadian forces successfully complete the taking of Vimy Ridge from the Germans.
May 19 » The Norwegian football club Rosenborg BK is founded.
May 21 » The Imperial War Graves Commission is established through royal charter to mark, record, and maintain the graves and places of commemoration of the British Empire's military forces.
July 6 » World War I: Arabian troops led by T. E. Lawrence ("Lawrence of Arabia") and Auda ibu Tayi capture Aqaba from the Ottoman Empire during the Arab Revolt.
November 24 » In Milwaukee, nine members of the Milwaukee Police Department are killed by a bomb, the most deaths in a single event in U.S. police history until the September 11 attacks in 2001.
Day of death April 4, 1980
The temperature on April 4, 1980 was between 3.1 °C and 8.4 °C and averaged 5.3 °C. There was -0.1 mm of rain. There was 6.3 hours of sunshine (48%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. 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 29 » Gordie Howe of the Hartford Whalers makes NHL history as he scores his 800th goal.
March 4 » Nationalist leader Robert Mugabe wins a sweeping election victory to become Zimbabwe's first black prime minister.
April 24 » Eight U.S. servicemen die in Operation Eagle Claw as they attempt to end the Iran hostage crisis.
May 17 » On the eve of presidential elections, Maoist guerrilla group Shining Path attacks a polling location in Chuschi (a town in Ayacucho), starting the Internal conflict in Peru.
June 27 » The 'Ustica massacre': Itavia Flight 870 crashes in the sea while en route from Bologna to Palermo, Italy, killing all 81 on board.
When copying data from this family tree, please include a reference to the origin: Hans Groothelm, "Family tree Groothelm", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-groothelm/I44.php : accessed October 1, 2026), "Johannes Groothelm (1917-1980)".
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