The temperature on April 20, 1911 was between 3.9 °C and 15.2 °C and averaged 9.6 °C. There was 11.7 hours of sunshine (82%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
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 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
June 22 » George V and Mary of Teck are crowned King and Queen of the United Kingdom of Great Britain and Ireland.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
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.
September 25 » An explosion of badly degraded propellant charges on board the French battleship Liberté detonates the forward ammunition magazines and destroys the ship.
Day of marriage May 18, 1943
The temperature on May 18, 1943 was between 6.4 °C and 18.5 °C and averaged 12.6 °C. There was 14.3 hours of sunshine (90%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
January 22 » World War II: Australian and American forces defeat Japanese army and navy units in the bitterly fought Battle of Buna–Gona.
February 10 » World War II: Attempting to completely lift the Siege of Leningrad, the Soviet Red Army engages German troops and Spanish volunteers in the Battle of Krasny Bor.
February 20 » American movie studio executives agree to allow the Office of War Information to censor movies.
September 3 » World War II: The Allied invasion of Italy begins on the same day that U.S. General Dwight D. Eisenhower and Italian Marshal Pietro Badoglio sign the Armistice of Cassibile aboard the Royal Navy battleship HMSNelson off Malta.
November 5 » World War II: Bombing of the Vatican.
November 23 » World War II: The Deutsche Opernhaus on Bismarckstraße in the Berlin neighborhood of Charlottenburg is destroyed. It will eventually be rebuilt in 1961 and be called the Deutsche Oper Berlin.
Day of death December 29, 1997
The temperature on December 29, 1997 was between 3.4 °C and 7.8 °C and averaged 5.6 °C. There was 1.6 mm of rain during 1.6 hours. There was 5.0 hours of sunshine (64%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from Monday, August 22, 1994 to Monday, August 3, 1998 the cabinet a href="https://nl.wikipedia.org/wiki/Kabinet-Kok_I" class="extern">Kok I, with W. Kok (PvdA) as prime minister.
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/I118940.php : accessed October 8, 2026), "Sietze Baron (1911-1997)".
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