The temperature on February 19, 1915 was between 5.2 °C and 8.5 °C and averaged 6.7 °C. There was 0.8 mm of rain. There was 3.6 hours of sunshine (35%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the south. 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.
January 24 » World War I: British Grand Fleet battle cruisers under Vice-Admiral Sir David Beatty engage Rear-Admiral Franz von Hipper's battle cruisers in the Battle of Dogger Bank.
April 5 » Boxing challenger Jess Willard knocks out Jack Johnson in Havana, Cuba to become the Heavyweight Champion of the World.
April 22 » The use of poison gas in World War I escalates when chlorine gas is released as a chemical weapon in the Second Battle of Ypres.
May 24 » World War I: Italy declares war on Austria-Hungary, joining the conflict on the side of the Allies.
October 14 » World War I: Bulgaria joins the Central Powers.
November 25 » Albert Einstein presents the field equations of general relativity to the Prussian Academy of Sciences.
Day of marriage July 16, 1945
The temperature on July 16, 1945 was between 12.4 °C and 22.8 °C and averaged 18.5 °C. There was 11.0 hours of sunshine (68%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest. 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.
In The Netherlands , there was from February 23, 1945 to June 24, 1945 the cabinet Gerbrandy III, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
From June 24, 1945 till July 3, 1946 the Netherlands had a cabinet Schermerhorn - Drees with the prime ministers Prof. ir. W. Schermerhorn (VDB) and W. Drees (PvdA).
April 6 » World War II: Sarajevo is liberated from German and Croatian forces by the Yugoslav Partisans.
April 30 » World War II: Stalag Luft I prisoner-of-war camp near Barth, Germany is liberated by Soviet soldiers, freeing nearly 9000 American and British airmen.
May 7 » World War II: Last German U boat attack of the war, two freighters are sunk off the Firth of Forth, Scotland.
May 8 » Hundreds of Algerian civilians are killed by French Army soldiers in the Sétif massacre.
June 26 » The United Nations Charter is signed by 50 Allied nations in San Francisco, California.
October 15 » The former premier of Vichy France, Pierre Laval, is executed for treason.
Day of death May 17, 1966
The temperature on May 17, 1966 was between 12.7 °C and 26.4 °C and averaged 18.4 °C. There was 11.2 hours of sunshine (71%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Nico de Kunder, "Family tree De Kunder", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-de-kunder/I6786.php : accessed February 14, 2026), "Helena Johanna Janssen (1915-1966)".
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.