May 9 » Australia opens its first national parliament in Melbourne.
August 14 » The first claimed powered flight, by Gustave Whitehead in his Number 21.
September 28 » Philippine–American War: Filipino guerrillas kill more than forty American soldiers while losing 28 of their own.
December 10 » The first Nobel Prize ceremony is held in Stockholm on the fifth anniversary of Alfred Nobel's death.
Day of death September 20, 1930
The temperature on September 20, 1930 was between 12.1 °C and 18.0 °C and averaged 14.3 °C. There was 0.5 mm of rain during 0.4 hours. There was 1.1 hours of sunshine (9%). The average windspeed was 6 Bft (strong wind) and was prevailing from the south-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.
February 18 » While studying photographs taken in January, Clyde Tombaugh discovers Pluto.
May 1 » "Pluto" is officially proposed for the name of the newly-discovered dwarf planet Pluto by Vesto Slipher in the Lowell Observatory Observation Circular. The name quickly catches on.
September 6 » Democratically elected Argentine president Hipólito Yrigoyen is deposed in a military coup.
September 8 » 3M begins marketing Scotch transparent tape.
November 3 » Getúlio Vargas becomes Head of the Provisional Government in Brazil after a bloodless coup on October 24.
November 11 » Patent number US1781541 is awarded to Albert Einstein and Leó Szilárd for their invention, the Einstein refrigerator.
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/I113699.php : accessed December 30, 2025), "Freerkje Zijlstra (1901-1930)".
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