The temperature on June 1, 1915 was between 3.6 °C and 19.5 °C and averaged 12.4 °C. There was 12.4 hours of sunshine (76%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. 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 » German strategic bombing during World War I: German zeppelins bomb the towns of Great Yarmouth and King's Lynn in the United Kingdom killing at least 20 people, in the first major aerial bombardment of a civilian target.
January 31 » World War I: Germany is the first to make large-scale use of poison gas in warfare in the Battle of Bolimów against Russia.
July 25 » RFC Captain Lanoe Hawker becomes the first British pursuit aviator to earn the Victoria Cross.
July 28 » The United States begins a 19-year occupation of Haiti.
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 death October 18, 1975
The temperature on October 18, 1975 was between 8.6 °C and 10.7 °C and averaged 9.5 °C. There was -0.1 hours of sunshine (0%). The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
February 28 » In London, an underground train fails to stop at Moorgate terminus station and crashes into the end of the tunnel, killing 43 people.
April 4 » Microsoft is founded as a partnership between Bill Gates and Paul Allen in Albuquerque, New Mexico.
July 17 » Apollo–Soyuz Test Project: An American Apollo and a Soviet Soyuz spacecraft dock with each other in orbit marking the first such link-up between spacecraft from the two nations.
July 27 » Mayor of Jaffna and former MP Alfred Duraiappah is shot dead.
July 30 » Jimmy Hoffa disappears from the parking lot of the Machus Red Fox restaurant in Bloomfield Hills, Michigan, a suburb of Detroit, at about 2:30p.m. He is never seen or heard from again.
December 26 » Tu-144, the world's first commercial supersonic aircraft, surpassing Mach2, went into service.
When copying data from this family tree, please include a reference to the origin: Wim van der Valk, "Van der Valk family tree", database, Genealogy Online (https://www.genealogieonline.nl/van-der-valk-stamboom/I29.php : accessed March 6, 2026), "Pieter van der Valk (1915-1975)".
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