The temperature on April 17, 1921 was between -3.1 °C and 9.8 °C and averaged 3.2 °C. There was 6.5 hours of sunshine (46%). The average windspeed was 4 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.
March 1 » Following mass protests in Petrograd demanding greater freedom in the RSFSR, the Kronstadt rebellion began, with sailors and citizens taking up arms against the Bolsheviks.
March 31 » The Royal Australian Air Force is formed.
April 2 » The Autonomous Government of Khorasan, a military government encompassing the modern state of Iran, is established.
August 3 » Major League Baseball Commissioner Kenesaw Mountain Landis confirms the ban of the eight Chicago Black Sox, the day after they were acquitted by a Chicago court.
September 7 » The Legion of Mary, the largest apostolic organization of lay people in the Catholic Church, is founded in Dublin, Ireland.
November 14 » The Communist Party of Spain is founded, and issues the first edition of Mundo obrero.
Day of marriage June 5, 1940
The temperature on June 5, 1940 was between 8.6 °C and 25.3 °C and averaged 18.3 °C. There was 15.3 hours of sunshine (93%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
May 9 » World War II: The German submarine U-9 sinks the French coastal submarine Doris near Den Helder.
July 25 » General Henri Guisan orders the Swiss Army to resist German invasion and makes surrender illegal.
August 5 » World War II: The Soviet Union formally annexes Latvia.
August 30 » The Second Vienna Award reassigns the territory of Northern Transylvania from Romania to Hungary.
September 7 » Romania returns Southern Dobruja to Bulgaria under the Treaty of Craiova.
October 28 » Second World War: Greece rejects Italy's ultimatum. Italy invades Greece through Albania a few hours later.
Day of death March 25, 1997
The temperature on March 25, 1997 was between 4.5 °C and 10.4 °C and averaged 7.4 °C. There was 1.9 mm of rain during 6.0 hours. There was 0.8 hours of sunshine (6%). The heavily clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the north. Source: KNMI
In The Netherlands , there was from Monday, August 22, 1994 to Monday, August 3, 1998 the cabinet a href="https://nl.wikipedia.org/wiki/Kabinet-Kok_I" class="extern">Kok I, with W. Kok (PvdA) as prime minister.
When copying data from this family tree, please include a reference to the origin: R.A.Hemerik, "Descendants Hemerik-Broekhuizen-Huner-Koper-Barink", database, Genealogy Online (https://www.genealogieonline.nl/parenteel-hemerik/I80447.php : accessed January 17, 2026), "Cornelis Abraham Siera (1921-1997)".
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