February 1 » La bohème premieres in Turin at the Teatro Regio (Turin), conducted by the young Arturo Toscanini.
August 30 » Philippine Revolution: After Spanish victory in the Battle of San Juan del Monte, eight provinces in the Philippines are declared under martial law by the Spanish Governor-General Ramón Blanco y Erenas.
September 21 » Anglo-Egyptian conquest of Sudan: British forces under the command of Horatio Kitchener take Dongola.
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.
November 27 » Also sprach Zarathustra by Richard Strauss is first performed.
December 14 » The Glasgow Underground Railway is opened by the Glasgow District Subway Company.
Day of marriage November 19, 1931
The temperature on November 19, 1931 was between 2.1 °C and 4.8 °C and averaged 3.7 °C. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 7 » Guy Menzies flies the first solo non-stop trans-Tasman flight (from Australia to New Zealand) in 11 hours and 45 minutes, crash-landing on New Zealand's west coast.
February 13 » The British Raj completes its transfer from Calcutta to New Delhi.
March 11 » Ready for Labour and Defence of the USSR, abbreviated as GTO, is introduced in the Soviet Union.
August 24 » Resignation of the United Kingdom's Second Labour Government. Formation of the UK National Government.
October 1 » Clara Campoamor persuades the Constituent Cortes to enfranchise women in Spain's new constitution.
October 21 » A secret society in the Imperial Japanese Army launches an abortive coup d'état attempt.
Day of death June 13, 1951
The temperature on June 13, 1951 was between 13.2 °C and 18.4 °C and averaged 15.4 °C. There was 0.1 mm of rain during 0.1 hours. There was 4.0 hours of sunshine (24%). The heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. 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).
In The Netherlands , there was from March 15, 1951 to September 2, 1952 the cabinet Drees I, with Dr. W. Drees (PvdA) as prime minister.
February 7 » Korean War: More than 700 suspected communist sympathizers are massacred by South Korean forces.
March 3 » Jackie Brenston, with Ike Turner and his band, records "Rocket 88", often cited as "the first rock and roll record", at Sam Phillips's recording studios in Memphis, Tennessee.
March 7 » Iranian prime minister Ali Razmara is assassinated by Khalil Tahmasebi, a member of the Islamic fundamentalist Fada'iyan-e Islam, inside a mosque in Tehran.
March 29 » Ethel and Julius Rosenberg are convicted of conspiracy to commit espionage.
May 23 » Tibetans sign the Seventeen Point Agreement with China.
July 26 » Walt Disney's 13th animated film, Alice in Wonderland, premieres in London, England, United Kingdom.
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/I77559.php : accessed October 4, 2026), "Roelf de Groot (1896-1951)".
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