The temperature on April 9, 1914 was between 5.7 °C and 12.1 °C and averaged 9.3 °C. There was 0.1 mm of rain. There was 4.8 hours of sunshine (36%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
May 29 » The Ocean liner RMSEmpress of Ireland sinks in the Gulf of Saint Lawrence with the loss of 1,012 lives.
June 12 » Massacre of Phocaea: Turkish irregulars slaughter 50 to 100 Greeks and expel thousands of others in an ethnic cleansing operation in the Ottoman Empire.
August 2 » The German occupation of Luxembourg during World War I begins.
August 12 » World War I: The Battle of Halen a.k.a. Battle of the Silver Helmets a clash between large Belgian and German cavalry formations at Halen, Belgium.
August 27 » World War I: Battle of Étreux: A British rearguard action by the Royal Munster Fusiliers during the Great Retreat.
November 7 » The first issue of The New Republic is published.
Day of marriage July 8, 1938
The temperature on July 8, 1938 was between 10.9 °C and 20.4 °C and averaged 16.4 °C. There was 0.7 mm of rain during 0.4 hours. There was 2.1 hours of sunshine (13%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
March 12 » Anschluss: German troops occupy and absorb Austria.
March 27 » Second Sino-Japanese War: The Battle of Taierzhuang begins, resulting several weeks later in the war's first major Chinese victory over Japan.
July 3 » World speed record for a steam locomotive is set in England, by the Mallard, which reaches a speed of 125.88 miles per hour (202.58km/h).
November 16 » LSD is first synthesized by Albert Hofmann from ergotamine at the Sandoz Laboratories in Basel.
December 13 » The Holocaust: The Neuengamme concentration camp opens in the Bergedorf district of Hamburg, Germany.
Day of death June 20, 1982
The temperature on June 20, 1982 was between 10.1 °C and 19.5 °C and averaged 14.8 °C. There was 6.6 hours of sunshine (39%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
In The Netherlands , there was from Friday, September 11, 1981 to Saturday, May 29, 1982 the cabinet Van Agt II, with Mr. A.A.M. van Agt (CDA) as prime minister.
In The Netherlands , there was from Saturday, May 29, 1982 to Thursday, November 4, 1982 the cabinet Van Agt III, with Mr. A.A.M. van Agt (CDA) as prime minister.
In The Netherlands , there was from Thursday, November 4, 1982 to Monday, July 14, 1986 the cabinet Lubbers I, with Drs. R.F.M. Lubbers (CDA) as prime minister.
May 2 » Falklands War: The British nuclear submarine HMSConqueror sinks the Argentine cruiser ARA General Belgrano.
June 10 » Lebanon War: The Syrian Arab Army defeats the Israeli Defense Forces in the Battle of Sultan Yacoub.
July 19 » In one of the first militant attacks by Hezbollah, David S. Dodge, president of the American University of Beirut, is kidnapped.
August 29 » The synthetic chemical element Meitnerium, atomic number 109, is first synthesized at the Gesellschaft für Schwerionenforschung in Darmstadt, Germany.
October 14 » U.S. President Ronald Reagan proclaims a War on Drugs.
December 2 » At the University of Utah, Barney Clark becomes the first person to receive a permanent artificial heart.
When copying data from this family tree, please include a reference to the origin: Peeters Mathieu, "FutureHistory", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-riske/I12422.php : accessed September 24, 2026), "Omer Polydoor de Groep (1914-1982)".
Copy warning
Genealogical publications are copyright protected. Although data is often retrieved from public archives, the searching, interpreting, collecting, selecting and sorting of the data results in a unique product. Copyright protected work may not simply be copied or republished.
Please stick to the following rules
Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
Do not use this data until you have checked it, preferably at the source (the archives).
State from whom you have copied the data and ideally also his/her original source.