February 7 » A Chinese immigrant in San Francisco falls ill to bubonic plague in the first plague epidemic in the continental United States.
February 23 » Second Boer War: During the Battle of the Tugela Heights, the first British attempt to take Hart's Hill fails.
February 27 » Second Boer War: In South Africa, British military leaders receive an unconditional notice of surrender from Boer General Piet Cronjé at the Battle of Paardeberg.
June 20 » Baron Eduard Toll, leader of the Russian Polar Expedition of 1900, departs Saint Petersburg in Russia on the explorer ship Zarya, never to return.
October 19 » Max Planck discovers Planck's law of black-body radiation.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of marriage February 23, 1939
The temperature on February 23, 1939 was between 0.2 °C and 10.6 °C and averaged 5.4 °C. There was 3.5 mm of rain during 4.0 hours. There was 2.7 hours of sunshine (26%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southeast. Source: KNMI
In The Netherlands , there was from June 24, 1937 to July 25, 1939 the cabinet Colijn IV, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from July 25, 1939 to August 10, 1939 the cabinet Colijn V, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
January 14 » Norway claims Queen Maud Land in Antarctica.
June 4 » The Holocaust: The MSSt. Louis, a ship carrying 963 Jewish refugees, is denied permission to land in Florida, in the United States, after already being turned away from Cuba. Forced to return to Europe, more than 200 of its passengers later die in Nazi concentration camps.
July 6 » Anti-Jewish legislation in prewar Nazi Germany closes the last remaining Jewish enterprises.
September 1 » The Wound Badge for Wehrmacht, SS, Kriegsmarine, and Luftwaffe soldiers is instituted. The final version of the Iron Cross is also instituted on this date.
September 10 » World War II: The submarine HMSOxley is mistakenly sunk by the submarine HMSTriton near Norway and becomes the Royal Navy's first loss of a submarine in the war.
December 4 » World War II: HMSNelson is struck by a mine (laid by U-31) off the Scottish coast and is laid up for repairs until August 1940.
Day of death March 21, 1940
The temperature on March 21, 1940 was between 6.3 °C and 10.6 °C and averaged 7.7 °C. There was 1.4 mm of rain during 0.6 hours. There was 0.9 hours of sunshine (7%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
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.
February 27 » Martin Kamen and Sam Ruben discover carbon-14.
April 7 » Booker T. Washington becomes the first African American to be depicted on a United States postage stamp.
April 9 » World War II: Operation Weserübung: Germany invades Denmark and Norway.
May 7 » World War II: The Norway Debate in the British House of Commons begins, and leads to the replacement of Prime Minister Neville Chamberlain with Winston Churchill three days later.
May 27 » World War II: In the Le Paradis massacre, 99 soldiers from a Royal Norfolk Regiment unit are shot after surrendering to German troops; two survive.
November 9 » Warsaw is awarded the Virtuti Militari.
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/I139786.php : accessed February 12, 2026), "Mentje Jantje Friso (1900-1940)".
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