The temperature on June 27, 1911 was between 7.1 °C and 15.7 °C and averaged 11.8 °C. There was 0.6 mm of rain. There was 5.2 hours of sunshine (31%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
March 25 » In New York City, the Triangle Shirtwaist Factory fire kills 146 garment workers.
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
August 29 » Ishi, considered the last Native American to make contact with European Americans, emerges from the wilderness of northeastern California.
September 20 » The White Star Line's RMSOlympic collides with the British warship HMSHawke.
September 24 » His Majesty's Airship No. 1, Britain's first rigid airship, is wrecked by strong winds before her maiden flight at Barrow-in-Furness.
December 24 » Lackawanna Cut-Off railway line opens in New Jersey and Pennsylvania.
Day of marriage May 20, 1938
The temperature on May 20, 1938 was between 2.3 °C and 13.7 °C and averaged 8.6 °C. There was 0.1 mm of rain during 0.1 hours. There was 5.6 hours of sunshine (35%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
January 3 » The March of Dimes is established as a foundation to combat infant polio by President Franklin D. Roosevelt.
February 11 » BBC Television produces the world's first ever science fiction television programme, an adaptation of a section of the Karel Čapek play R.U.R., that coined the term "robot".
April 30 » The animated cartoon short Porky's Hare Hunt debuts in movie theaters, introducing Happy Rabbit, an early version of Bugs Bunny.
November 16 » LSD is first synthesized by Albert Hofmann from ergotamine at the Sandoz Laboratories in Basel.
December 16 » Adolf Hitler institutes the Cross of Honour of the German Mother.
December 17 » Otto Hahn discovers the nuclear fission of the heavy element uranium, the scientific and technological basis of nuclear energy.
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/I132064.php : accessed October 23, 2026), "Mijntje van der Heide (1911-)".
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