The temperature on April 1, 1911 was between 0.7 °C and 14.2 °C and averaged 6.6 °C. There was 5.6 hours of sunshine (43%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
January 18 » Eugene B. Ely lands on the deck of the USSPennsylvania anchored in San Francisco Bay, the first time an aircraft landed on a ship.
May 15 » In Standard Oil Co. of New Jersey v. United States, the United States Supreme Court declares Standard Oil to be an "unreasonable" monopoly under the Sherman Antitrust Act and orders the company to be broken up.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
August 1 » Harriet Quimby takes her pilot's test and becomes the first U.S. woman to earn an Aero Club of America aviator's certificate.
September 25 » An explosion of badly degraded propellant charges on board the French battleship Liberté detonates the forward ammunition magazines and destroys the ship.
December 27 » "Jana Gana Mana", the national anthem of India, is first sung in the Calcutta Session of the Indian National Congress.
Day of death December 24, 1919
The temperature on December 24, 1919 was between 4.1 °C and 7.4 °C and averaged 5.8 °C. There was 0.4 mm of rain. There was 2.7 hours of sunshine (35%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. 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 15 » Rosa Luxemburg and Karl Liebknecht, two of the most prominent socialists in Germany, are tortured and murdered by the Freikorps at the end of the Spartacist uprising.
January 18 » Ignacy Jan Paderewski becomes Prime Minister of the newly independent Poland.
February 11 » Friedrich Ebert (SPD), is elected President of Germany.
June 2 » Anarchists simultaneously set off bombs in eight separate U.S. cities.
August 11 » Germany's Weimar Constitution is signed into law.
September 22 » The steel strike of 1919, led by the Amalgamated Association of Iron and Steel Workers, begins in Pennsylvania before spreading across the United States.
When copying data from this family tree, please include a reference to the origin: Dirk Zwinderman, "Family tree van de familie Zwinderman/Dijk", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-zwinderman-dijk/I5149.php : accessed February 18, 2026), "Wilhelmus Vroom (1911-1919)".
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