The temperature on June 18, 1914 was between 8.0 °C and 17.3 °C and averaged 13.9 °C. There was 0.6 hours of sunshine (4%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northwest. 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.
April 9 » Mexican Revolution: One of the world's first naval/air skirmishes takes place off the coast of western Mexico.
August 1 » The German Empire declares war on the Russian Empire at the opening of World War I. The Swiss Army mobilizes because of World War I.
August 20 » World War I: Brussels is captured during the German invasion of Belgium.
August 26 » World War I: During the retreat from Mons, the British II Corps commanded by General Sir Horace Smith-Dorrien fought a vigorous and successful defensive action at Le Cateau.
September 8 » World War I: Private Thomas Highgate becomes the first British soldier to be executed for desertion during the war.
December 8 » World War I: A squadron of Britain's Royal Navy defeats the Imperial German East Asia Squadron in the Battle of the Falkland Islands in the South Atlantic.
Day of marriage May 18, 1940
The temperature on May 18, 1940 was between 8.5 °C and 19.2 °C and averaged 13.4 °C. There was 9.9 hours of sunshine (63%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-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.
February 10 » The Soviet Union begins mass deportations of Polish citizens from occupied eastern Poland to Siberia.
May 15 » World War II: After fierce fighting, the poorly trained and equipped Dutch troops surrender to Germany, marking the beginning of five years of occupation.
June 25 » World War II: The French armistice with Germany comes into effect.
August 18 » World War II: The Hardest Day air battle, part of the Battle of Britain. At that point, the largest aerial engagement in history with heavy losses sustained on both sides.
August 25 » World War II: The first Bombing of Berlin by the British Royal Air Force.
November 8 » Greco-Italian War: The Italian invasion of Greece fails as outnumbered Greek units repulse the Italians in the Battle of Elaia–Kalamas.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I139966.php : accessed October 20, 2026), "Wybren Kooistra (1914-)".
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.