The temperature on June 15, 1918 was between 7.6 °C and 15.5 °C and averaged 12.2 °C. There was 5.0 mm of rain. There was 11.3 hours of sunshine (68%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. 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.
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
February 25 » German forces capture Tallinn to virtually complete the occupation of Estonia.
March 23 » First World War: On the third day of the German Spring Offensive, the 10th Battalion of the Royal West Kent Regiment is annihilated with many of the men becoming prisoners of war
July 4 » Bolsheviks kill Tsar Nicholas II of Russia and his family (Julian calendar date).
November 21 » A pogrom takes place in Lwów (now Lviv); over three days, at least 50 Jews and 270 Ukrainian Christians are killed by Poles.
November 23 » Heber J. Grant succeeds Joseph F. Smith as the seventh president of The Church of Jesus Christ of Latter-day Saints.
December 16 » Vincas Mickevičius-Kapsukas declares the formation of the Lithuanian Soviet Socialist Republic; it is dissolved in 1919.
Day of marriage May 15, 1941
The temperature on May 15, 1941 was between 0.6 °C and 12.2 °C and averaged 6.3 °C. There was 6.8 hours of sunshine (43%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
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.
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 17 » Franco-Thai War: Vichy French forces inflict a decisive defeat over the Royal Thai Navy.
March 27 » World War II: Yugoslav Air Force officers topple the pro-Axis government in a bloodless coup.
May 1 » World War II: German forces launch a major attack during the siege of Tobruk.
May 8 » World War II: The German Luftwaffe launches a bombing raid on Nottingham and Derby.
July 20 » Soviet leader Joseph Stalin consolidates the Commissariats of Home Affairs and National Security to form the NKVD and names Lavrentiy Beria its chief.
October 17 » World War II: The USS Kearny becomes the first US Navy vessel to be torpedoed by a U-boat.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I398196.php : accessed February 19, 2026), "Harmtien Helmholt (1918-< 2017)".
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