The temperature on May 23, 1910 was between 10.8 °C and 23.7 °C and averaged 17.6 °C. There was 12.0 hours of sunshine (75%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
March 8 » French aviator Raymonde de Laroche becomes the first woman to receive a pilot's license.
June 25 » Igor Stravinsky's ballet The Firebird is premiered in Paris, bringing him to prominence as a composer.
June 25 » The United States Congress passes the Mann Act, which prohibits interstate transport of women or girls for “immoral purposes”; the ambiguous language would be used to selectively prosecute people for years to come.
July 15 » In his book Clinical Psychiatry, Emil Kraepelin gives a name to Alzheimer's disease, naming it after his colleague Alois Alzheimer.
September 22 » The Duke of York's Picture House opens in Brighton, now the oldest continually operating cinema in Britain.
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.
Day of marriage May 17, 1935
The temperature on May 17, 1935 was between -1.7 °C and 11.0 °C and averaged 5.0 °C. There was 0.1 mm of rain during 0.3 hours. There was 6.6 hours of sunshine (42%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Walter Waterschoot, "Family tree Waterschoot en De Lepper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-waterschoot/I9986.php : accessed January 7, 2026), "Petrus Johannes "Petrus" de Lepper (1910-)".
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