The temperature on April 17, 1911 was between 0.2 °C and 16.3 °C and averaged 9.9 °C. There was 7.9 hours of sunshine (56%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 30 » At the Indianapolis Motor Speedway, the first Indianapolis 500 ends with Ray Harroun in his Marmon Wasp becoming the first winner of the 500-mile auto race.
May 31 » The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
August 29 » Ishi, considered the last Native American to make contact with European Americans, emerges from the wilderness of northeastern California.
October 9 » An accidental bomb explosion triggers the Wuchang Uprising against the Chinese monarchy.
November 5 » After declaring war on the Ottoman Empire on September 29, 1911, Italy annexes Tripoli and Cyrenaica.
Day of marriage May 23, 1940
The temperature on May 23, 1940 was between 9.6 °C and 20.5 °C and averaged 14.8 °C. There was 0.1 mm of rain. There was 10.1 hours of sunshine (63%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
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.
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.
February 28 » Basketball is televised for the first time (Fordham University vs. the University of Pittsburgh in Madison Square Garden).
May 9 » World War II: The German submarine U-9 sinks the French coastal submarine Doris near Den Helder.
May 24 » Acting on the orders of Soviet leader Joseph Stalin, NKVD agent Iosif Grigulevich orchestrates an unsuccessful assassination attempt on exiled Russian revolutionary Leon Trotsky in Coyoacán, Mexico.
May 27 » World War II: In the Le Paradis massacre, 99 soldiers from a Royal Norfolk Regiment unit are shot after surrendering to German troops; two survive.
June 18 » The "Finest Hour" speech is delivered by Winston Churchill.
July 19 » Field Marshal Ceremony: First occasion in World War II that Adolf Hitler appoints field marshals due to military achievements.
Day of death November 21, 1995
The temperature on November 21, 1995 was between -0.2 °C and 4.9 °C and averaged 2.1 °C. There was 7.2 hours of sunshine (84%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
In The Netherlands , there was from Monday, August 22, 1994 to Monday, August 3, 1998 the cabinet a href="https://nl.wikipedia.org/wiki/Kabinet-Kok_I" class="extern">Kok I, with W. Kok (PvdA) as prime minister.
January 19 » After being struck by lightning the crew of Bristow Flight 56C are forced to ditch. All 18 aboard are later rescued.
February 21 » Steve Fossett lands in Leader, Saskatchewan, Canada becoming the first person to make a solo flight across the Pacific Ocean in a balloon.
March 16 » Mississippi formally ratifies the Thirteenth Amendment, becoming the last state to approve the abolition of slavery. The Thirteenth Amendment was officially ratified in 1865.
October 16 » The Skye Bridge in Scotland is opened.
October 30 » Quebec citizens narrowly vote (50.58% to 49.42%) in favour of remaining a province of Canada in their second referendum on national sovereignty.
December 14 » Yugoslav Wars: The Dayton Agreement is signed in Paris by the leaders of the Federal Republic of Yugoslavia, Croatia, and Bosnia and Herzegovina.
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/I167718.php : accessed October 18, 2026), "Ype Douma (1911-1995)".
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