The temperature on April 27, 1940 was between 10.3 °C and 17.3 °C and averaged 13.1 °C. There was 1.1 mm of rain during 2.2 hours. There was 2.1 hours of sunshine (14%). The average windspeed was 2 Bft (weak wind) and was prevailing from the 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 16 » World War II: Altmark incident: The German tanker Altmark is boarded by sailors from the British destroyer HMSCossack. 299 British prisoners are freed.
June 5 » World War II: After a brief lull in the Battle of France, the Germans renew the offensive against the remaining French divisions south of the River Somme in Operation Fall Rot ("Case Red").
June 16 » World War II: Marshal Henri Philippe Pétain becomes Chief of State of Vichy France (Chef de l'État Français).
July 3 » World War II: The Royal Navy attacks the French naval squadron in Algeria, to ensure that it will not fall under German control. Of the four French battleships present, one is sunk, two are damaged, and one escapes back to France.
December 14 » Plutonium (specifically Pu-238) is first isolated at Berkeley, California.
December 29 » World War II: In the Second Great Fire of London, the Luftwaffe fire-bombs London, England, killing almost 200 civilians.
When copying data from this family tree, please include a reference to the origin: Arie Verloop, "Family tree Verloop", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-verloop/I10027.php : accessed December 28, 2025), "Cornelis Johannisz van der PERK (1863-1940)".
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.