The temperature on October 5, 1911 was between 7.1 °C and 11.9 °C and averaged 9.8 °C. There was 1.2 mm of rain. There was 0.1 hours of sunshine (1%). The average windspeed was 2 Bft (weak wind) and was prevailing from the northeast. Source: KNMI
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
August 29 » The Canadian Naval Service becomes the Royal Canadian Navy.
December 9 » A mine explosion near Briceville, Tennessee, kills 84 miners despite rescue efforts led by the United States Bureau of Mines.
December 29 » Mongolia gains independence from the Qing dynasty, enthroning 8th Jebtsundamba Khutughtu as Khagan of Mongolia.
Day of marriage April 16, 1947
The temperature on April 16, 1947 was between 8.0 °C and 16.5 °C and averaged 11.0 °C. There was 4.1 hours of sunshine (29%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
January 1 » The Canadian Citizenship Act 1946 comes into effect, converting British subjects into Canadian citizens. Prime Minister William Lyon Mackenzie King becomes the first Canadian citizen.
January 3 » Proceedings of the U.S. Congress are televised for the first time.
March 1 » The International Monetary Fund begins financial operations.
March 17 » First flight of the B-45 Tornado strategic bomber.
July 10 » Muhammad Ali Jinnah is recommended as the first Governor-General of Pakistan by the British Prime Minister, Clement Attlee.
July 19 » Prime Minister of the shadow Burmese government, Bogyoke Aung San and eight others are assassinated.
Day of death September 7, 1971
The temperature on September 7, 1971 was between 8.3 °C and 22.5 °C and averaged 15.6 °C. There was 12.2 hours of sunshine (92%). The almost cloudless was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east. Source: KNMI
February 2 » Idi Amin replaces President Milton Obote as leader of Uganda.
April 1 » Bangladesh Liberation War: The Pakistan Army massacre over 1,000 people in Keraniganj Upazila, Bangladesh.
June 11 » The U.S. Government forcibly removes the last holdouts to the Native American Occupation of Alcatraz, ending 19 months of control.
July 15 » The United Red Army is founded in Japan.
December 1 » Cambodian Civil War: Khmer Rouge rebels intensify assaults on Cambodian government positions, forcing their retreat from Kompong Thmar and nearby Ba Ray.
December 16 » Bangladesh Liberation War and Indo-Pakistani War of 1971: The ceasefire of the Pakistan Army brings an end to both conflicts. This is commemorated annually as Victory Day in Bangladesh, and as Vijay Diwas in India.
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/I116006.php : accessed October 24, 2026), "Ymkje Boersma (1911-1971)".
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