The temperature on August 26, 1911 was between 13.0 °C and 22.8 °C and averaged 17.4 °C. There was 11.1 hours of sunshine (79%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
April 2 » The Australian Bureau of Statistics conducts the country's first national census.
April 6 » During the Battle of Deçiq, Dedë Gjon Luli Dedvukaj, leader of the Malësori Albanians, raises the Albanian flag in the town of Tuzi, Montenegro, for the first time after George Kastrioti (Skanderbeg).
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
June 28 » The Nakhla meteorite, the first one to suggest signs of aqueous processes on Mars, falls to Earth, landing in Egypt.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
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: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I136837.php : accessed October 21, 2026), "Ale de Haan (1911-)".
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