The temperature on June 10, 1913 was between 10.4 °C and 14.9 °C and averaged 12.2 °C. There was 16.1 mm of rain. There was 0.3 hours of sunshine (2%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from February 12, 1908 to August 29, 1913 the cabinet Heemskerk, with Mr. Th. Heemskerk (AR) as prime minister.
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.
February 2 » Grand Central Terminal is opened in New York City.
February 20 » King O'Malley drives in the first survey peg to mark commencement of work on the construction of Canberra.
February 21 » Ioannina is incorporated into the Greek state after the Balkan Wars.
March 4 » First Balkan War: The Greek army engages the Turks at Bizani, resulting in victory two days later.
August 10 » Second Balkan War: Delegates from Bulgaria, Romania, Serbia, Montenegro, and Greece sign the Treaty of Bucharest, ending the war.
October 9 » The steamship SSVolturno catches fire in the mid-Atlantic.
Day of marriage March 20, 1943
The temperature on March 20, 1943 was between -1.3 °C and 10.2 °C and averaged 4.8 °C. There was 3.9 mm of rain during 2.3 hours. There was 0.2 hours of sunshine (2%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
January 11 » The Republic of China agrees to the Sino-British New Equal Treaty and the Sino-American New Equal Treaty.
January 18 » Warsaw Ghetto Uprising: The first uprising of Jews in the Warsaw Ghetto.
March 21 » Wehrmacht officer Rudolf von Gersdorff plots to assassinate Adolf Hitler by using a suicide bomb, but the plan falls through; von Gersdorff is able to defuse the bomb in time and avoid suspicion.
June 20 » World War II: The Royal Air Force launches Operation Bellicose, the first shuttle bombing raid of the war. Lancaster bombers damage the V-2 rocket production facilities at the Zeppelin Works while en route to an air base in Algeria.
July 28 » World War II: Operation Gomorrah: The Royal Air Force bombs Hamburg, Germany causing a firestorm that kills 42,000 German civilians.
November 5 » World War II: Bombing of the Vatican.
When copying data from this family tree, please include a reference to the origin: Gert Jonker, "Family tree Jonker", database, Genealogy Online (https://www.genealogieonline.nl/jonker_stamboom/I23219.php : accessed January 28, 2026), "Jan Klein Velderman (1913-)".
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.