The temperature on February 20, 1911 was between 0.5 °C and 7.1 °C and averaged 3.1 °C. There was 2.7 mm of rain. There was 2.2 hours of sunshine (21%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
July 7 » The United States, UK, Japan, and Russia sign the North Pacific Fur Seal Convention of 1911 banning open-water seal hunting, the first international treaty to address wildlife preservation issues.
August 1 » Harriet Quimby takes her pilot's test and becomes the first U.S. woman to earn an Aero Club of America aviator's certificate.
September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
September 24 » His Majesty's Airship No. 1, Britain's first rigid airship, is wrecked by strong winds before her maiden flight at Barrow-in-Furness.
September 25 » An explosion of badly degraded propellant charges on board the French battleship Liberté detonates the forward ammunition magazines and destroys the ship.
December 29 » Mongolia gains independence from the Qing dynasty, enthroning 8th Jebtsundamba Khutughtu as Khagan of Mongolia.
Day of marriage June 2, 1938
The temperature on June 2, 1938 was between 7.8 °C and 18.0 °C and averaged 12.7 °C. There was 0.1 mm of rain. There was 7.7 hours of sunshine (47%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the south-southwest. Source: KNMI
March 12 » Anschluss: German troops occupy and absorb Austria.
March 18 » Mexico creates Pemex by expropriating all foreign-owned oil reserves and facilities.
April 10 » The 1938 German parliamentary election and referendum seeks approval for a single list of Nazi candidates and the recent annexation of Austria.
July 10 » Howard Hughes begins a 91-hour airplane flight around the world that will set a new record.
July 31 » Archaeologists discover engraved gold and silver plates from King Darius the Great in Persepolis.
October 31 » Great Depression: In an effort to restore investor confidence, the New York Stock Exchange unveils a fifteen-point program aimed to upgrade protection for the investing public.
Day of death July 25, 1997
The temperature on July 25, 1997 was between 14.8 °C and 18.9 °C and averaged 16.4 °C. There was 7.1 mm of rain during 4.2 hours. There was 3.2 hours of sunshine (20%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from Monday, August 22, 1994 to Monday, August 3, 1998 the cabinet a href="https://nl.wikipedia.org/wiki/Kabinet-Kok_I" class="extern">Kok I, with W. Kok (PvdA) as prime minister.
May 11 » Deep Blue, a chess-playing supercomputer, defeats Garry Kasparov in the last game of the rematch, becoming the first computer to beat a world-champion chess player in a classic match format.
August 3 » Oued El-Had and Mezouara massacre in Algeria: A total of 116 villagers killed, 40 in Oued El-Had and 76 in Mezouara.
September 7 » Maiden flight of the Lockheed Martin F-22 Raptor.
October 25 » After a civil war, Denis Sassou Nguesso proclaims himself President of the Republic of the Congo.
November 17 » In Luxor, Egypt, 62 people are killed by six Islamic militants outside the Temple of Hatshepsut, known as Luxor massacre.
December 19 » SilkAir Flight 185 crashes into the Musi River, near Palembang in Indonesia, killing 104.
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/I167675.php : accessed October 11, 2026), "Halbe Zijlstra (1911-1997)".
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