The temperature on July 21, 1910 was between 14.2 °C and 17.7 °C and averaged 15.9 °C. There was 13.1 mm of rain. The average windspeed was 5 Bft (very strong wind) and was prevailing from the southwest. Source: KNMI
March 3 » Rockefeller Foundation: John D. Rockefeller Jr. announces his retirement from managing his businesses so that he can devote all his time to philanthropy.
May 4 » The Royal Canadian Navy is created.
May 31 » The South Africa Act comes into force, establishing the Union of South Africa.
June 19 » The first Father's Day is celebrated in Spokane, Washington.
June 25 » Igor Stravinsky's ballet The Firebird is premiered in Paris, bringing him to prominence as a composer.
July 15 » In his book Clinical Psychiatry, Emil Kraepelin gives a name to Alzheimer's disease, naming it after his colleague Alois Alzheimer.
Day of marriage January 26, 1939
The temperature on January 26, 1939 was between 0.2 °C and 3.9 °C and averaged 2.4 °C. There was 4.7 mm of rain during 5.4 hours. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. 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.
May 14 » Lina Medina becomes the youngest confirmed mother in medical history at the age of five.
September 3 » World War II: The United Kingdom and France begin a naval blockade of Germany that lasts until the end of the war. This also marks the beginning of the Battle of the Atlantic.
September 19 » World War II: The Battle of Kępa Oksywska concludes, with Polish losses reaching roughly 14% of all the forces engaged.
September 21 » Romanian Prime Minister Armand Călinescu is assassinated by the Iron Guard.
October 6 » World War II: The Battle of Kock is the final combat of the September Campaign in Poland.
November 23 » World War II: HMSRawalpindi is sunk by the German battleships Scharnhorst and Gneisenau.
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/I168161.php : accessed October 12, 2026), "Sybren de Boer (1910-)".
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