The temperature on March 16, 1911 was between -4.0 °C and 6.9 °C and averaged 0.5 °C. There was 1.3 mm of rain. There was 2.0 hours of sunshine (17%). The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
January 18 » Eugene B. Ely lands on the deck of the USSPennsylvania anchored in San Francisco Bay, the first time an aircraft landed on a ship.
January 21 » The first Monte Carlo Rally takes place.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 31 » The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
October 5 » The Kowloon–Canton Railway commences service.
November 5 » After declaring war on the Ottoman Empire on September 29, 1911, Italy annexes Tripoli and Cyrenaica.
Day of marriage July 30, 1936
The temperature on July 30, 1936 was between 9.0 °C and 19.6 °C and averaged 14.7 °C. There was 0.5 mm of rain during 0.2 hours. There was 10.6 hours of sunshine (68%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
March 7 » Prelude to World War II: In violation of the Locarno Pact and the Treaty of Versailles, Germany reoccupies the Rhineland.
March 8 » Daytona Beach and Road Course holds its first oval stock car race.
April 5 » Tupelo–Gainesville tornado outbreak: An F5 tornado kills 233 in Tupelo, Mississippi.
July 6 » A major breach of the Manchester Bolton & Bury Canal in England sends millions of gallons of water cascading 200 feet (61m) into the River Irwell.
August 31 » Radio Prague, now the official international broadcasting station of the Czech Republic, goes on the air.
December 21 » First flight of the Junkers Ju 88 multi-role combat aircraft.
Day of death July 3, 1979
The temperature on July 3, 1979 was between 8.9 °C and 21.0 °C and averaged 15.7 °C. There was 11.7 hours of sunshine (70%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. 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 14 » In Kabul, Setami Milli militants kidnap the American ambassador to Afghanistan, Adolph Dubs who is later killed during a gunfight between his kidnappers and police.
June 2 » Pope John Paul II starts his first official visit to his native Poland, becoming the first Pope to visit a Communist country.
October 6 » Pope John Paul II becomes the first pontiff to visit the White House.
November 4 » Iran hostage crisis: A group of Iranian college students overruns the U.S. embassy in Tehran and takes 90 hostages.
November 12 » Iran hostage crisis: In response to the hostage situation in Tehran, US President Jimmy Carter orders a halt to all petroleum imports into the United States from Iran.
December 3 » Ayatollah Ruhollah Khomeini becomes the first Supreme Leader of Iran.
When copying data from this family tree, please include a reference to the origin: Hendrik de Graaf, "Family tree Plugboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plugboer/I7794.php : accessed February 4, 2026), "Heiltje Geertruida Dobber (1911-1979)".
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