The temperature on September 13, 1910 was between 7.8 °C and 13.6 °C and averaged 11.1 °C. There was 23.8 mm of rain. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
January 13 » The first public radio broadcast takes place; a live performance of the operas Cavalleria rusticana and Pagliacci are sent out over the airwaves from the Metropolitan Opera House in New York.
June 2 » Charles Rolls, a co-founder of Rolls-Royce Limited, becomes the first man to make a non-stop double crossing of the English Channel by plane.
August 22 » Korea is annexed by Japan with the signing of the Japan–Korea Treaty of 1910, beginning a period of Japanese rule of Korea that lasted until the end of World War II.
November 10 » The date of Thomas A. Davis' opening of the San Diego Army and Navy Academy, although the official founding date is November 23, 1910.
November 20 » Mexican Revolution: Francisco I. Madero issues the Plan de San Luis Potosí, denouncing Mexican President Porfirio Díaz, calling for a revolution to overthrow the government of Mexico, effectively starting the Mexican Revolution.
December 21 » An underground explosion at the Hulton Bank Colliery No. 3 Pit in Over Hulton, Westhoughton, England, kills 344 miners.
Day of marriage June 18, 1932
The temperature on June 18, 1932 was between 8.5 °C and 16.4 °C and averaged 12.8 °C. There was 4.7 hours of sunshine (28%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 1 » The United States Post Office Department issues a set of 12 stamps commemorating the 200th anniversary of George Washington's birth.
January 25 » Second Sino-Japanese War: The Chinese National Revolutionary Army begins the defense of Harbin.
February 25 » Hitler, having been stateless for seven years, obtains German citizenship when he is appointed a Brunswick state official by Dietrich Klagges, a fellow Nazi. As a result, Hitler is able to run for Reichspräsident in the 1932 election.
May 28 » In the Netherlands, construction of the Afsluitdijk is completed and the Zuiderzee bay is converted to the freshwater IJsselmeer.
December 10 » Thailand becomes a constitutional monarchy.
December 25 » A magnitude 7.6 earthquake in Gansu, China kills 275 people.
Day of death September 21, 1968
The temperature on September 21, 1968 was between 11.8 °C and 18.0 °C and averaged 14.7 °C. There was 7.7 hours of sunshine (62%). The partly clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 7 » Surveyor Program: Surveyor 7, the last spacecraft in the Surveyor series, lifts off from launch complex 36A, Cape Canaveral.
February 1 » The New York Central Railroad and the Pennsylvania Railroad are merged to form Penn Central Transportation.
April 10 » The TEV Wahine, a New Zealand ferry sinks in Wellington harbour due to a fierce storm – the strongest winds ever in Wellington. Out of the 734 people on board, fifty-three died.
August 20 » Cold War: Warsaw Pact troops invade Czechoslovakia, crushing the Prague Spring. East German participation is limited to a few specialists due to memories of the recent war. Only Albania and Romania refuse to participate.
August 21 » Cold War: Nicolae Ceaușescu, leader of Communist Romania, publicly condemns the Soviet-led Warsaw Pact invasion of Czechoslovakia, encouraging the Romanian population to arm itself against possible Soviet reprisals.
November 11 » Vietnam War: Operation Commando Hunt initiated. The goal is to interdict men and supplies on the Ho Chi Minh trail, through Laos into South Vietnam.
When copying data from this family tree, please include a reference to the origin: Elly Gelderman, "Family tree Gelderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-gelderman/I7351.php : accessed February 20, 2026), "Hendrika Zonnenberg (1910-1968)".
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