The temperature on July 31, 1919 was between 10.8 °C and 18.5 °C and averaged 14.2 °C. There was 4.0 hours of sunshine (26%). The average windspeed was 2 Bft (weak wind) and was prevailing from the 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 18 » World War I: The Paris Peace Conference opens in Versailles, France.
May 19 » Mustafa Kemal Atatürk lands at Samsun on the Anatolian Black Sea coast, initiating what is later termed the Turkish War of Independence.
June 14 » John Alcock and Arthur Whitten Brown depart from St. John's, Newfoundland on the first nonstop transatlantic flight.
September 18 » The Netherlands gives women the right to vote.
October 17 » RCA is incorporated as the Radio Corporation of America.
December 1 » Lady Astor becomes the first female Member of Parliament to take her seat in the House of Commons of the United Kingdom. (She had been elected to that position on November 28.)
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I15530.php : accessed January 19, 2026), "Roelof Petrus Gerhardus Klopper (1844-1919)".
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