February 4 » The Philippine–American War begins with the Battle of Manila.
March 6 » Bayer registers "Aspirin" as a trademark.
March 27 » Emilio Aguinaldo leads Filipino forces for the only time during the Philippine–American War at the Battle of Marilao River.
May 30 » Pearl Hart, a female outlaw of the Old West, robs a stage coach 30 miles southeast of Globe, Arizona.
November 28 » The Second Boer War: a British column is engaged by Boer forces at the Battle of Modder River; although the Boers withdraw, the British suffer heavy casualties.
Day of marriage May 21, 1935
The temperature on May 21, 1935 was between 5.8 °C and 16.2 °C and averaged 9.8 °C. There was 0.7 mm of rain during 1.0 hours. There was 6.3 hours of sunshine (39%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
January 11 » Amelia Earhart becomes the first person to fly solo from Hawaii to California.
February 28 » DuPont scientist Wallace Carothers invents nylon.
June 12 » A ceasefire is negotiated between Bolivia and Paraguay, ending the Chaco War.
July 28 » First flight of the Boeing B-17 Flying Fortress.
August 14 » Franklin D. Roosevelt signs the Social Security Act, creating a government pension system for the retired.
September 2 » The Labor Day Hurricane, the most intense hurricane to strike the United States, makes landfall at Long Key, Florida, killing at least 400.
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/I2184.php : accessed December 24, 2025), "Kornelis Grupstra (1899-????)".
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