The temperature on December 13, 1911 was between 0.1 °C and 5.4 °C and averaged 2.9 °C. There was 1.0 mm of rain. There was 1.7 hours of sunshine (22%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
January 15 » Palestinian Arabic-language Falastin newspaper founded.
April 27 » Following the resignation and death of William P. Frye, a compromise is reached to rotate the office of President pro tempore of the United States Senate.
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
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.
December 29 » Sun Yat-sen becomes the provisional President of the Republic of China; he formally takes office on January 1, 1912.
Day of marriage August 21, 1931
The temperature on August 21, 1931 was between 12.3 °C and 17.6 °C and averaged 14.5 °C. There was 4.8 mm of rain during 3.0 hours. There was 1.8 hours of sunshine (13%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
March 3 » The United States adopts The Star-Spangled Banner as its national anthem.
March 14 » Alam Ara, India's first talking film, is released.
March 23 » Bhagat Singh, Shivaram Rajguru and Sukhdev Thapar are hanged for the killing of a deputy superintendent of police during the Indian independence movement.
March 26 » Ho Chi Minh Communist Youth Union is founded in Vietnam.
June 23 » Wiley Post and Harold Gatty take off from Roosevelt Field, Long Island in an attempt to circumnavigate the world in a single-engine plane.
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The Family tree Van Willigen publication was prepared by Rob van Willigen (contact is not possible).
When copying data from this family tree, please include a reference to the origin: Rob van Willigen, "Family tree Van Willigen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-willigen/I14868.php : accessed February 2, 2026), "Jacoba Wilhelmina Jannetje van Wilgen (1911-)".
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