January 22 » The United Mine Workers of America is founded in Columbus, Ohio.
April 7 » Completion of the first Lake Biwa Canal.
July 3 » Idaho is admitted as the 43rd U.S. state.
July 27 » Vincent van Gogh shoots himself and dies two days later.
September 25 » The United States Congress establishes Sequoia National Park.
October 12 » Uddevalla Suffrage Association is formed.
Day of marriage April 9, 1919
The temperature on April 9, 1919 was between 2.6 °C and 12.5 °C and averaged 7.5 °C. There was 8.2 hours of sunshine (61%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. 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.
March 2 » The first Communist International meets in Moscow.
June 14 » John Alcock and Arthur Whitten Brown depart from St. John's, Newfoundland on the first nonstop transatlantic flight.
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.
June 28 » The Treaty of Versailles is signed, ending the state of war between Germany and the Allies of World War I.
July 11 » The eight-hour day and free Sunday become law for workers in the Netherlands.
October 17 » RCA is incorporated as the Radio Corporation of America.
Day of death August 14, 1930
The temperature on August 14, 1930 was between 11.0 °C and 17.2 °C and averaged 13.5 °C. There was 20.3 mm of rain during 9.1 hours. There was 2.9 hours of sunshine (20%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the west. 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 26 » The Indian National Congress declares 26 January as Independence Day or as the day for Poorna Swaraj ("Complete Independence") which occurred 17 years later.
April 6 » At the end of the Salt March, Gandhi raises a lump of mud and salt and declares, "With this, I am shaking the foundations of the British Empire."
April 28 » The Independence Producers hosted the first night game in the history of Organized Baseball in Independence, Kansas.
September 27 » Bobby Jones wins the (pre-Masters) Grand Slam of golf.
October 3 » The German Socialist Labour Party in Poland – Left is founded.
December 29 » Sir Muhammad Iqbal's presidential address in Allahabad introduces the two-nation theory and outlines a vision for the creation of Pakistan.
When copying data from this family tree, please include a reference to the origin: Ronald van 't Hoff, "Family tree Van 't Hoff - Zondag - Bosch - de Zwaan - vd Kolk - Westhuis - Plomp", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-t-hoff/I4161.php : accessed February 26, 2026), "Cornelis Johannes Polderman (1890-1930)".
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