The temperature on April 18, 1911 was between 3.3 °C and 18.2 °C and averaged 12.4 °C. There was 8.0 hours of sunshine (57%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
January 15 » Palestinian Arabic-language Falastin newspaper founded.
January 21 » The first Monte Carlo Rally takes place.
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.
August 14 » United States Senate leaders agree to rotate the office of President pro tempore of the Senate among leading candidates to fill the vacancy left by William P. Frye's death.
September 25 » An explosion of badly degraded propellant charges on board the French battleship Liberté detonates the forward ammunition magazines and destroys the ship.
December 14 » Roald Amundsen's team, comprising himself, Olav Bjaaland, Helmer Hanssen, Sverre Hassel, and Oscar Wisting, becomes the first to reach the South Pole.
When copying data from this family tree, please include a reference to the origin: J Eijsermans, "Eijsermans family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijsermans/I513651.php : accessed January 26, 2026), "Adrianus Sirks (1911-1978)".
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