The temperature on April 4, 1909 was between -3.2 °C and 10.3 °C and averaged 4.2 °C. There was 11.7 hours of sunshine (89%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
February 20 » Publication of the Futurist Manifesto in the French journal Le Figaro.
February 22 » The sixteen battleships of the Great White Fleet, led by USSConnecticut, return to the United States after a voyage around the world.
February 23 » The AEA Silver Dart makes the first powered flight in Canada and the British Empire.
March 10 » By signing the Anglo-Siamese Treaty of 1909, Thailand relinquishes its sovereignty over the Malay states of Kedah, Kelantan, Perlis and Terengganu, which become British protectorates.
July 25 » Louis Blériot makes the first flight across the English Channel in a heavier-than-air machine from Calais to Dover, England, United Kingdom in 37 minutes.
September 23 » The novel Le Fantôme de l'Opéra (The Phantom of the Opera), by Gaston Leroux, is published as a serialization in Le Gaulois.
Day of marriage September 23, 1935
The temperature on September 23, 1935 was between 8.4 °C and 16.1 °C and averaged 12.8 °C. There was 6.1 mm of rain during 1.7 hours. There was 7.8 hours of sunshine (64%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
February 26 » Adolf Hitler orders the Luftwaffe to be re-formed, violating the provisions of the Treaty of Versailles.
February 26 » Robert Watson-Watt carries out a demonstration near Daventry which leads directly to the development of radar in the United Kingdom.
May 14 » The Constitution of the Philippines is ratified by a popular vote.
June 3 » One thousand unemployed Canadian workers board freight cars in Vancouver, beginning a protest trek to Ottawa.
December 12 » Lebensborn Project, a Nazi reproduction program, is founded by Heinrich Himmler.
December 27 » Regina Jonas is ordained as the first female rabbi in the history of Judaism.
Day of death February 20, 1980
The temperature on February 20, 1980 was between -0.3 °C and 8.9 °C and averaged 4.2 °C. There was 8.4 hours of sunshine (82%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southeast. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
When copying data from this family tree, please include a reference to the origin: W. Rovers, "Family tree Ro(o)vers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_rovers/I24248.php : accessed February 6, 2026), "Petrus Antonius Roovers (1909-1980)".
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