The temperature on August 22, 1915 was between 6.8 °C and 19.4 °C and averaged 13.5 °C. There was 0.1 mm of rain. There was 3.9 hours of sunshine (27%). 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 28 » An act of the U.S. Congress creates the United States Coast Guard as a branch of the United States Armed Forces.
April 25 » World War I: The Battle of Gallipoli begins: The invasion of the Turkish Gallipoli Peninsula by British, French, Indian, Newfoundland, Australian and New Zealand troops, begins with landings at Anzac Cove and Cape Helles.
July 1 » Leutnant Kurt Wintgens of the then-named German Deutsches Heer's Fliegertruppe army air service achieves the first known aerial victory with a synchronized machine-gun armed fighter plane, the Fokker M.5K/MG Eindecker.
August 29 » US Navy salvage divers raise F-4, the first U.S. submarine sunk in an accident.
September 30 » World War I: Radoje Ljutovac becomes the first soldier in history to shoot down an enemy aircraft with ground-to-air fire.
October 14 » World War I: Bulgaria joins the Central Powers.
Day of marriage May 20, 1939
The temperature on May 20, 1939 was between 1.7 °C and 15.8 °C and averaged 9.1 °C. There was 12.2 hours of sunshine (77%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
In The Netherlands , there was from June 24, 1937 to July 25, 1939 the cabinet Colijn IV, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from July 25, 1939 to August 10, 1939 the cabinet Colijn V, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
January 13 » The Black Friday bushfires burn 20,000 square kilometers of land in Australia, claiming the lives of 71 people.
March 23 » The Hungarian air force attacks the headquarters of the Slovak air force in Spišská Nová Ves, killing 13 people and beginning the Slovak–Hungarian War.
September 1 » General George C. Marshall becomes Chief of Staff of the United States Army.
September 9 » Burmese national hero U Ottama dies in prison after a hunger strike to protest Britain's colonial government.
October 8 » World War II: Germany annexes western Poland.
November 15 » In Washington, D.C., US President Franklin D. Roosevelt lays the cornerstone of the Jefferson Memorial.
Day of death November 4, 1979
The temperature on November 4, 1979 was between 7.4 °C and 12.8 °C and averaged 10.4 °C. There was 11.1 mm of rain during 8.4 hours. The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
February 7 » Pluto moves inside Neptune's orbit for the first time since either was discovered.
June 18 » SALT II is signed by the United States and the Soviet Union.
July 17 » Nicaraguan dictator General Anastasio Somoza Debayle resigns and flees to Miami, Florida, United States.
October 18 » The Federal Communications Commission (FCC) begins allowing people to have home satellite earth stations without a federal government license.
October 26 » Park Chung-hee, President of South Korea, is assassinated by Korean CIA head Kim Jae-gyu.
November 4 » Iran hostage crisis: A group of Iranian college students overruns the U.S. embassy in Tehran and takes 90 hostages.
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/I117716.php : accessed October 24, 2026), "Johannes Helder (1915-1979)".
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