The temperature on July 16, 1911 was between 9.9 °C and 17.4 °C and averaged 14.2 °C. There was 0.3 mm of rain. There was 2.2 hours of sunshine (14%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
January 29 » Mexican Revolution: Mexicali is captured by the Mexican Liberal Party, igniting the Magonista rebellion of 1911.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
July 7 » The United States, UK, Japan, and Russia sign the North Pacific Fur Seal Convention of 1911 banning open-water seal hunting, the first international treaty to address wildlife preservation issues.
October 9 » An accidental bomb explosion triggers the Wuchang Uprising against the Chinese monarchy.
November 17 » Omega Psi Phi fraternity was founded on the campus of Howard University in Washington, D.C.
Day of marriage April 20, 1939
The temperature on April 20, 1939 was between 1.7 °C and 17.7 °C and averaged 10.1 °C. There was 11.8 hours of sunshine (83%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. 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.
February 28 » The erroneous word "dord" is discovered in the Webster's New International Dictionary, Second Edition, prompting an investigation.
March 17 » Second Sino-Japanese War: Battle of Nanchang between the Kuomintang and Japan begins.
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.
April 30 » NBC inaugurates its regularly scheduled television service in New York City, broadcasting President Franklin D. Roosevelt's N.Y. World's Fair opening day ceremonial address.
September 30 » World War II: General Władysław Sikorski becomes prime minister of the Polish government-in-exile.
November 8 » Venlo Incident: Two British agents of SIS are captured by the Germans.
Day of death June 13, 1950
The temperature on June 13, 1950 was between 12.9 °C and 23.4 °C and averaged 18.0 °C. There was 11.6 hours of sunshine (70%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
January 14 » The first prototype of the MiG-17 makes its maiden flight.
January 31 » Cold War: U.S. President Harry S. Truman announces a program to develop the hydrogen bomb.
August 29 » Korean War: British troops arrive in Korea to bolster the US presence there.
September 24 » The eastern United States is covered by a thick haze from the Chinchaga fire in western Canada.
November 19 » US General Dwight D. Eisenhower becomes Supreme Commander of NATO-Europe.
November 21 » Two Canadian National Railway trains collide in northeastern British Columbia in the Canoe River train crash; the death toll is 21, with 17 of them Canadian troops bound for Korea.
When copying data from this family tree, please include a reference to the origin: Jan De Backer, "Family tree De Backer - Evers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-de-backer-evers/I566169.php : accessed March 1, 2026), "Maria Hubertina Menten (1911-1950)".
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