The temperature on February 21, 1910 was between 4.4 °C and 11.4 °C and averaged 8.0 °C. There was 13.1 mm of rain. There was 1.7 hours of sunshine (16%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the south-southwest. Source: KNMI
February 8 » The Boy Scouts of America is incorporated by William D. Boyce.
April 16 » The oldest existing indoor ice hockey arena still used for the sport in the 21st century, Boston Arena, opens for the first time.
June 19 » The first Father's Day is celebrated in Spokane, Washington.
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 14 » Aviator Eugene Burton Ely performs the first takeoff from a ship in Hampton Roads, Virginia, taking off from a makeshift deck on the USS Birmingham in a Curtiss pusher.
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.
Day of death May 8, 1974
The temperature on May 8, 1974 was between 5.4 °C and 12.4 °C and averaged 8.5 °C. The almost completely overcast was. The average windspeed was 1 Bft (weak wind) and was prevailing from the south. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
January 2 » United States President Richard Nixon signs a bill lowering the maximum U.S. speed limit to 55 MPH in order to conserve gasoline during an OPEC embargo.
May 15 » Ma'alot massacre: Members of the Democratic Front for the Liberation of Palestine attack and take hostages at an Israeli school; a total of 31 people are killed, including 22 schoolchildren.
May 18 » Nuclear weapons testing: Under project Smiling Buddha, India successfully detonates its first nuclear weapon becoming the sixth nation to do so.
June 29 » Vice President Isabel Perón assumes powers and duties as Acting President of Argentina, while her husband President Juan Peron is terminally ill.
July 28 » Spetsgruppa A, Russia's elite special force, was formed.
September 10 » Guinea-Bissau gains independence from Portugal.
When copying data from this family tree, please include a reference to the origin: E. van Houtum-Swalen, "Descendants Heijmans", database, Genealogy Online (https://www.genealogieonline.nl/parenteel-heijmans/I366.php : accessed January 28, 2026), "Petronella Johanna Maria Verblackt (1910-1974)".
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