The temperature on June 12, 1911 was between 1.8 °C and 17.8 °C and averaged 11.5 °C. There was 10.7 hours of sunshine (64%). The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
January 18 » Eugene B. Ely lands on the deck of the USSPennsylvania anchored in San Francisco Bay, the first time an aircraft landed on a ship.
January 26 » Glenn Curtiss flies the first successful American seaplane.
February 18 » The first official flight with airmail takes place from Allahabad, United Provinces, British India (now India), when Henri Pequet, a 23-year-old pilot, delivers 6,500 letters to Naini, about 10 kilometres (6.2mi) away.
May 31 » The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
August 24 » Manuel de Arriaga is elected and sworn-in as the first President of Portugal.
December 24 » Lackawanna Cut-Off railway line opens in New Jersey and Pennsylvania.
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/I140625.php : accessed October 23, 2026), "Sjoerd Kloostra (1911-)".
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