The temperature on May 4, 1919 was between 4.2 °C and 18.0 °C and averaged 12.2 °C. There was 8.9 hours of sunshine (59%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. 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.
January 18 » World War I: The Paris Peace Conference opens in Versailles, France.
May 15 » The Winnipeg general strike begins. By 11:00, almost the whole working population of Winnipeg had walked off the job.
July 11 » The eight-hour day and free Sunday become law for workers in the Netherlands.
September 28 » Race riots begin in Omaha, Nebraska.
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.)
Day of death June 25, 1967
The temperature on June 25, 1967 was between 12.1 °C and 24.1 °C and averaged 18.2 °C. There was 4.4 mm of rain during 1.9 hours. There was 7.0 hours of sunshine (42%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southwest. Source: KNMI
March 7 » The Majelis Permusyawaratan Rakyat Sementara (MPRS), Indonesia's provisional parliament, revoked Sukarno's mandate as President of Indonesia.
June 14 » Mariner program: Mariner 5 is launched towards Venus.
September 10 » The people of Gibraltar vote to remain a British dependency rather than becoming part of Spain.
October 4 » Omar Ali Saifuddien III of Brunei abdicates in favour of his son.
October 8 » Guerrilla leader Che Guevara and his men are captured in Bolivia.
November 28 » The first pulsar (PSR B1919+21, in the constellation of Vulpecula) is discovered by two astronomers Jocelyn Bell Burnell and Antony Hewish.
When copying data from this family tree, please include a reference to the origin: Michael Jacobs, "Family tree Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-michael-jacobs/I99341.php : accessed February 16, 2026), "Roelof Siepel (1919-1967)".
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