January 31 » Czechoslav Trade Union Association is founded in Prague.
April 18 » The Greco-Turkish War is declared between Greece and the Ottoman Empire.
June 22 » British colonial officers Charles Walter Rand and Lt. Charles Egerton Ayerst are assassinated in Pune, Maharashtra, India by the Chapekar brothers and Mahadeo Vinayak Ranade, who are later caught and hanged.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
August 31 » Thomas Edison patents the Kinetoscope, the first movie projector.
Day of marriage September 17, 1920
The temperature on September 17, 1920 was between 9.9 °C and 17.6 °C and averaged 13.5 °C. There was 1.7 mm of rain. There was 5.7 hours of sunshine (45%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
May 16 » In Rome, Pope Benedict XV canonizes Joan of Arc.
July 20 » The Greek Army takes control of Silivri after Greece is awarded the city by the Paris Peace Conference; by 1923 Greece effectively lost control to the Turks.
July 29 » Construction of the Link River Dam begins as part of the Klamath Reclamation Project.
September 1 » The Fountain of Time opens as a tribute to the 100 years of peace between the United States and Great Britain following the Treaty of Ghent.
November 15 » First assembly of the League of Nations is held in Geneva, Switzerland.
November 28 » FIDAC (The Interallied Federation of War Veterans Organisations), the first international organization of war veterans is established in Paris, France
Day of death November 30, 1977
The temperature on November 30, 1977 was between 0.1 °C and 3.9 °C and averaged 1.6 °C. There was -0.1 mm of rain. The almost completely overcast was. The average windspeed was 1 Bft (weak wind) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
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.
January 17 » Capital punishment in the United States resumes after a ten-year hiatus, as convicted murderer Gary Gilmore is executed by firing squad in Utah.
January 18 » Australia's worst rail disaster occurs at Granville, Sydney killing 83.
January 19 » President Gerald Ford pardons Iva Toguri D'Aquino (a.k.a. "Tokyo Rose").
March 16 » Assassination of Kamal Jumblatt, the main leader of the anti-government forces in the Lebanese Civil War.
October 6 » The first prototype of the Mikoyan MiG-29, designated 9-01, makes its maiden flight.
November 11 » A munitions explosion at a train station in Iri, South Korea kills at least 56 people.
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/I211421.php : accessed January 2, 2026), "Pieter Jansma (1897-1977)".
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