The temperature on February 8, 1911 was between -2.5 °C and 4.8 °C and averaged 1.8 °C. The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
January 26 » Glenn Curtiss flies the first successful American seaplane.
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
June 22 » Mexican Revolution: Government forces bring an end to the Magonista rebellion of 1911 in the Second Battle of Tijuana.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
August 1 » Harriet Quimby takes her pilot's test and becomes the first U.S. woman to earn an Aero Club of America aviator's certificate.
August 24 » Manuel de Arriaga is elected and sworn-in as the first President of Portugal.
Day of marriage May 8, 1935
The temperature on May 8, 1935 was between 6.7 °C and 15.4 °C and averaged 11.1 °C. There was 7.4 hours of sunshine (48%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
February 28 » DuPont scientist Wallace Carothers invents nylon.
April 14 » The Black Sunday dust storm, considered one of the worst storms of the Dust Bowl, swept across the Oklahoma and Texas panhandles and neighboring areas.
May 29 » First flight of the Messerschmitt Bf 109 fighter aeroplane.
June 10 » Dr. Robert Smith takes his last drink, and Alcoholics Anonymous is founded in Akron, Ohio, United States, by him and Bill Wilson.
July 16 » The world's first parking meter is installed in Oklahoma City, Oklahoma.
November 22 » The China Clipper inaugurates the first commercial transpacific air service, connecting Alameda, California with Manila.
When copying data from this family tree, please include a reference to the origin: Jan Kaper, "Family tree Kaper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaper/I55403.php : accessed February 15, 2026), "Oktje Heikens (1911-)".
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