The temperature on May 21, 1910 was between 13.4 °C and 27.7 °C and averaged 20.6 °C. There was 10.7 hours of sunshine (67%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
January 1 » Captain David Beatty is promoted to Rear admiral, and becomes the youngest admiral in the Royal Navy (except for Royal family members) since Horatio Nelson.
March 8 » French aviator Raymonde de Laroche becomes the first woman to receive a pilot's license.
July 16 » John Robertson Duigan makes the first flight of the Duigan pusher biplane, the first aircraft built in Australia.
August 29 » The Japan–Korea Treaty of 1910, also known as the Japan–Korea Annexation Treaty, becomes effective, officially starting the period of Japanese rule in Korea.
October 6 » Eleftherios Venizelos is elected prime minister of Greece for the first of seven times.
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.
When copying data from this family tree, please include a reference to the origin: Pam Schaeffer Massung, "Schaeffer-Massung Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/schaeffer-massung-family-tree/I282433456822.php : accessed May 13, 2025), "Leo John SMITH (1910-)".
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