The temperature on March 17, 1927 was between 0.2 °C and 13.8 °C and averaged 7.2 °C. There was 9.4 hours of sunshine (79%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
February 23 » German theoretical physicist Werner Heisenberg writes a letter to fellow physicist Wolfgang Pauli, in which he describes his uncertainty principle for the first time.
April 23 » Cardiff City defeat Arsenal in the FA Cup Final, the only time it has been won by a team not based in England.
May 5 » To the Lighthouse by Virginia Woolf is first published.
May 8 » Attempting to make the first non-stop transatlantic flight from Paris to New York, French war heroes Charles Nungesser and François Coli disappear after taking off aboard The White Bird biplane.
May 18 » After being founded for 20 years, the Government of the Republic of China approves Tongji University to be among the first national universities of the Republic of China.
May 22 » Near Xining, China, an 8.3 magnitude earthquake causes 200,000 deaths in one of the world's most destructive earthquakes.
Day of marriage May 9, 1947
The temperature on May 9, 1947 was between 11.4 °C and 26.9 °C and averaged 19.9 °C. There was 10.5 hours of sunshine (68%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
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/I189882.php : accessed October 14, 2026), "Hendrikje Postma (1927-2021)".
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