The temperature on June 9, 1917 was between 15.1 °C and 19.2 °C and averaged 17.0 °C. There was 3.5 mm of rain. There was -0.1 hours of sunshine (0%). The average windspeed was 3 Bft (moderate breeze) 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.
January 19 » Silvertown explosion: A blast at a munitions factory in London kills 73 and injures over 400. The resulting fire causes over £2,000,000 worth of damage.
January 31 » World War I: Germany announces that its U-boats will resume unrestricted submarine warfare after a two-year hiatus.
May 18 » World War I: The Selective Service Act of 1917 is passed, giving the President of the United States the power of conscription.
June 4 » The first Pulitzer Prizes are awarded: Laura E. Richards, Maude H. Elliott, and Florence Hall receive the first Pulitzer for biography (for Julia Ward Howe). Jean Jules Jusserand receives the first Pulitzer for history for his work With Americans of Past and Present Days. Herbert B. Swope receives the first Pulitzer for journalism for his work for the New York World.
August 18 » A Great Fire in Thessaloniki, Greece destroys 32% of the city leaving 70,000 individuals homeless.
Day of marriage March 18, 1942
The temperature on March 18, 1942 was between 7.5 °C and 11.9 °C and averaged 8.8 °C. There was 1.0 mm of rain during 0.7 hours. There was 1.6 hours of sunshine (13%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-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.
January 1 » The Declaration by United Nations is signed by twenty-six nations.
March 29 » The Bombing of Lübeck in World War II is the first major success for the RAF Bomber Command against Germany and a German city.
June 26 » The first flight of the Grumman F6F Hellcat.
September 21 » The Boeing B-29 Superfortress makes its maiden flight.
November 27 » World War II: At Toulon, the French navy scuttles its ships and submarines to keep them out of Nazi hands.
December 2 » World War II: During the Manhattan Project, a team led by Enrico Fermi initiates the first artificial self-sustaining nuclear chain reaction.
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/I125109.php : accessed January 2, 2026), "Catharinus Helfrich (1917-)".
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