The temperature on December 2, 1915 was between 3.3 °C and 8.7 °C and averaged 6.7 °C. There was 2.4 mm of rain. There was 0.1 hours of sunshine (1%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. 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.
January 24 » World War I: British Grand Fleet battle cruisers under Vice-Admiral Sir David Beatty engage Rear-Admiral Franz von Hipper's battle cruisers in the Battle of Dogger Bank.
January 26 » The Rocky Mountain National Park is established by an act of the U.S. Congress.
February 8 » D. W. Griffith's controversial film The Birth of a Nation premieres in Los Angeles.
March 26 » The Vancouver Millionaires win the 1915 Stanley Cup Finals, the first championship played between the Pacific Coast Hockey Association and the National Hockey Association.
April 18 » French pilot Roland Garros is shot down and glides to a landing on the German side of the lines during World War I.
May 24 » World War I: Italy declares war on Austria-Hungary, joining the conflict on the side of the Allies.
Day of marriage December 15, 1943
The temperature on December 15, 1943 was between -1.1 °C and 2.6 °C and averaged 0.5 °C. There was 3.0 hours of sunshine (39%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
January 27 » World War II: The Eighth Air Force sorties ninety-one B-17s and B-24s to attack the U-boat construction yards at Wilhelmshaven, Germany. This was the first American bombing attack on Germany.
February 19 » World War II: Battle of Kasserine Pass in Tunisia begins.
July 19 » World War II: Rome is heavily bombed by more than 500 Allied aircraft, inflicting thousands of casualties.
August 15 » World War II: Battle of Trahili: Superior German forces surround Cretan partisans, who manage to escape against all odds.
September 7 » A fire at the Gulf Hotel in Houston kills 55 people.
October 16 » Holocaust in Italy: Raid of the Ghetto of Rome.
When copying data from this family tree, please include a reference to the origin: Gert Jonker, "Family tree Jonker", database, Genealogy Online (https://www.genealogieonline.nl/jonker_stamboom/I21723.php : accessed February 19, 2026), "Jannes Frederik de Groot (1915-)".
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