August 14 » The first claimed powered flight, by Gustave Whitehead in his Number 21.
August 21 » Six hundred American school teachers, Thomasites, arrived in Manila on the USAT Thomas.
November 8 » Gospel riots: Bloody clashes take place in Athens following the translation of the Gospels into demotic Greek.
November 18 » Britain and the United States sign the Hay–Pauncefote Treaty, which nullifies the Clayton–Bulwer Treaty and withdraws British objections to an American-controlled canal in Panama.
November 27 » The U.S. Army War College is established.
Day of marriage December 17, 1919
The temperature on December 17, 1919 was between 0.1 °C and 3.6 °C and averaged 1.6 °C. There was 3.8 mm of rain. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. 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 18 » Ignacy Jan Paderewski becomes Prime Minister of the newly independent Poland.
March 1 » March 1st Movement begins in Korea under Japanese rule.
June 23 » Estonian War of Independence: The decisive defeat of the Baltische Landeswehr in the Battle of Cēsis; this date is celebrated as Victory Day in Estonia.
July 6 » The British dirigible R34 lands in New York, completing the first crossing of the Atlantic Ocean by an airship.
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.
November 28 » Lady Astor is elected as a Member of the Parliament of the United Kingdom. She is the first woman to sit in the House of Commons. (Countess Markievicz, the first to be elected, refused to sit.)
When copying data from this family tree, please include a reference to the origin: Rene Valk, "Family tree J + P Valk", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-valk/I150.php : accessed February 2, 2026), "Johanna Jacoba van PIETERSON (1901-)".
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