The temperature on March 21, 1911 was between 0.7 °C and 14.3 °C and averaged 7.1 °C. There was 1.4 mm of rain. There was 2.4 hours of sunshine (20%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
June 28 » The Nakhla meteorite, the first one to suggest signs of aqueous processes on Mars, falls to Earth, landing in Egypt.
July 1 » Germany despatches the gunship SMSPanther to Morocco, sparking the Agadir Crisis.
July 7 » The United States, UK, Japan, and Russia sign the North Pacific Fur Seal Convention of 1911 banning open-water seal hunting, the first international treaty to address wildlife preservation issues.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
September 18 » Russian Premier Pyotr Stolypin is shot at the Kiev Opera House.
November 5 » After declaring war on the Ottoman Empire on September 29, 1911, Italy annexes Tripoli and Cyrenaica.
Day of marriage August 25, 1937
The temperature on August 25, 1937 was between 12.7 °C and 22.5 °C and averaged 18.0 °C. There was 0.1 mm of rain. There was 10.5 hours of sunshine (74%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
May 6 » Hindenburg disaster: The German zeppelin Hindenburg catches fire and is destroyed within a minute while attempting to dock at Lakehurst, New Jersey. Thirty-six people are killed.
May 21 » A Soviet station, North Pole-1, becomes the first scientific research settlement to operate on the drift ice of the Arctic Ocean.
July 6 » Spanish Civil War: Battle of Brunete: The battle begins with Spanish Republican troops going on the offensive against the Nationalists to relieve pressure on Madrid.
August 24 » Spanish Civil War: the Basque Army surrenders to the Italian Corpo Truppe Volontarie following the Santoña Agreement.
December 22 » The Lincoln Tunnel opens to traffic in New York City.
December 29 » The Irish Free State is replaced by a new state called Ireland with the adoption of a new constitution.
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/I167702.php : accessed October 6, 2026), "Anno Klunder (1911-)".
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