April 15 » Closing ceremony of the Games of the I Olympiad in Athens, Greece.
June 2 » Guglielmo Marconi applies for a patent for his wireless telegraph.
June 28 » An explosion in the Newton Coal Company's Twin Shaft Mine in Pittston, Pennsylvania results in a massive cave-in that kills 58 miners.
August 16 » Skookum Jim Mason, George Carmack and Dawson Charlie discover gold in a tributary of the Klondike River in Canada, setting off the Klondike Gold Rush.
November 27 » Also sprach Zarathustra by Richard Strauss is first performed.
December 10 » Alfred Jarry's Ubu Roi premieres in Paris. A riot breaks out at the end of the performance.
Day of marriage June 17, 1920
The temperature on June 17, 1920 was between 11.5 °C and 26.1 °C and averaged 19.2 °C. There was 13.2 hours of sunshine (79%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. 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.
May 16 » In Rome, Pope Benedict XV canonizes Joan of Arc.
May 29 » The Louth flood of 1920 was a severe flash flooding in the Lincolnshire market town of Louth which occurred 29 May 1920, resulting in 23 fatalities in 20 minutes. It has been described as one of the most significant flood disasters in Britain during the 20th century.
July 29 » Construction of the Link River Dam begins as part of the Klamath Reclamation Project.
November 28 » FIDAC (The Interallied Federation of War Veterans Organisations), the first international organization of war veterans is established in Paris, France
December 16 » The Haiyuan earthquake of 8.5Mw , rocks the Gansu province in China, killing an estimated 200,000.
Day of death February 15, 1941
The temperature on February 15, 1941 was between 2.0 °C and 8.2 °C and averaged 4.4 °C. There was 1.2 hours of sunshine (12%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southeast. Source: KNMI
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
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 25 » Pope Pius XII elevates the Apostolic Vicariate of the Hawaiian Islands to the dignity of a diocese. It becomes the Roman Catholic Diocese of Honolulu.
March 11 » World War II: United States President Franklin D. Roosevelt signs the Lend-Lease Act into law, allowing American-built war supplies to be shipped to the Allies on loan.
March 17 » In Washington, D.C., the National Gallery of Art is officially opened by President Franklin D. Roosevelt.
July 31 » The Holocaust: Under instructions from Adolf Hitler, Nazi official Hermann Göring, orders SS General Reinhard Heydrich to "submit to me as soon as possible a general plan of the administrative material and financial measures necessary for carrying out the desired Final Solution of the Jewish question."
December 5 » World War II: Great Britain declares war on Finland, Hungary and Romania.
December 10 » World War II: The Royal Navy capital ships HMSPrince of Wales and HMSRepulse are sunk by Imperial Japanese Navy torpedo bombers near British Malaya.
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/I133912.php : accessed February 21, 2026), "Pietje van der Ploeg (1896-1941)".
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