The temperature on September 18, 1911 was between 8.1 °C and 19.0 °C and averaged 13.4 °C. There was 6.4 hours of sunshine (51%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
February 18 » The first official flight with airmail takes place from Allahabad, United Provinces, British India (now India), when Henri Pequet, a 23-year-old pilot, delivers 6,500 letters to Naini, about 10 kilometres (6.2mi) away.
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
May 19 » Parks Canada, the world's first national park service, is established as the Dominion Parks Branch under the Department of the Interior.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
August 29 » Ishi, considered the last Native American to make contact with European Americans, emerges from the wilderness of northeastern California.
November 5 » After declaring war on the Ottoman Empire on September 29, 1911, Italy annexes Tripoli and Cyrenaica.
Day of marriage May 11, 1939
The temperature on May 11, 1939 was between 8.5 °C and 17.3 °C and averaged 11.9 °C. There was 0.2 mm of rain during 0.2 hours. There was 4.8 hours of sunshine (31%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
In The Netherlands , there was from June 24, 1937 to July 25, 1939 the cabinet Colijn IV, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from July 25, 1939 to August 10, 1939 the cabinet Colijn V, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
January 13 » The Black Friday bushfires burn 20,000 square kilometers of land in Australia, claiming the lives of 71 people.
April 4 » Faisal II becomes King of Iraq.
June 24 » Siam is renamed Thailand by Plaek Phibunsongkhram, the country's third prime minister.
July 6 » Anti-Jewish legislation in prewar Nazi Germany closes the last remaining Jewish enterprises.
September 4 » World War II: William J. Murphy commands the first Royal Air Force attack on Germany.
December 27 » The 7.8 Mw Erzincan earthquake shakes eastern Turkey with a maximum Mercalli intensity of XI (Extreme). At least 32,700 people were killed.
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/I119102.php : accessed October 17, 2026), "Baukje van der Ploeg (1911-)".
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