February 1 » La bohème premieres in Turin at the Teatro Regio (Turin), conducted by the young Arturo Toscanini.
March 1 » Battle of Adwa: An Ethiopian army defeats an outnumbered Italian force, ending the First Italo-Ethiopian War.
April 6 » In Athens, the opening of the first modern Olympic Games is celebrated, 1,500 years after the original games are banned by Roman emperor Theodosius I.
September 22 » Queen Victoria surpasses her grandfather King George III as the longest reigning monarch in British history.
November 17 » The Western Pennsylvania Hockey League, which later became the first ice hockey league to openly trade and hire players, began play at Pittsburgh's Schenley Park Casino.
December 10 » Alfred Jarry's Ubu Roi premieres in Paris. A riot breaks out at the end of the performance.
Day of marriage May 12, 1917
The temperature on May 12, 1917 was between 10.1 °C and 27.0 °C and averaged 19.2 °C. There was 7.8 hours of sunshine (50%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. 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.
June 26 » World War I: The American Expeditionary Forces begin to arrive in France. They will first enter combat four months later.
October 25 » Old Style date of the October Revolution in Russia.
October 26 » First World War: Brazil declares war on the Central Powers.
November 5 » Tikhon is elected the Patriarch of Moscow and of the Russian Orthodox Church.
December 12 » Father Edward J. Flanagan founds Boys Town as a farm village for wayward boys.
Day of death January 2, 1950
The temperature on January 2, 1950 was between -0.3 °C and 8.2 °C and averaged 4.8 °C. There was 8.5 mm of rain during 7.3 hours. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
March 12 » The Llandow air disaster kills 80 people when the aircraft they are travelling in crashes near Sigingstone, Wales. At the time this was the world's deadliest air disaster.
March 17 » Researchers at the University of California, Berkeley announce the creation of element 98, which they name "californium".
July 20 » Cold War: In Philadelphia, Harry Gold pleads guilty to spying for the Soviet Union by passing secrets from atomic scientist Klaus Fuchs.
October 21 » Korean War: Heavy fighting begins between British and Australian forces against the North Koreans during the Battle of Yongju.
November 19 » US General Dwight D. Eisenhower becomes Supreme Commander of NATO-Europe.
December 17 » The F-86 Sabre's first mission over Korea.
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/I109341.php : accessed October 11, 2026), "Tjeerd van Os (1896-1950)".
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