January 31 » Czechoslav Trade Union Association is founded in Prague.
April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
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).
November 1 » The first Library of Congress building opens its doors to the public; the library had previously been housed in the Congressional Reading Room in the U.S. Capitol.
December 30 » The British Colony of Natal annexes Zululand.
Day of marriage December 23, 1920
The temperature on December 23, 1920 was between -0.5 °C and 4.9 °C and averaged 2.1 °C. There was 0.9 mm of rain. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. 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.
January 26 » Former Ford Motor Company executive Henry Leland launches the Lincoln Motor Company which he later sold to his former employer.
March 22 » Azeri and Turkish army soldiers with participation of Kurdish gangs attacked the Armenian inhabitants of Shushi (Nagorno Karabakh).
May 9 » Polish–Soviet War: The Polish army under General Edward Rydz-Śmigły celebrates its capture of Kiev with a victory parade on Khreshchatyk.
May 16 » In Rome, Pope Benedict XV canonizes Joan of Arc.
June 4 » Hungary loses 71% of its territory and 63% of its population when the Treaty of Trianon is signed in Paris.
December 3 » Following more than a month of Turkish–Armenian War, the Turkish dictated Treaty of Alexandropol is concluded.
Day of death February 9, 1985
The temperature on February 9, 1985 was between -6.6 °C and -3.0 °C and averaged -4.1 °C. There was -0.1 mm of rain. The heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from Thursday, November 4, 1982 to Monday, July 14, 1986 the cabinet Lubbers I, with Drs. R.F.M. Lubbers (CDA) as prime minister.
April 21 » The compound of the militant group The Covenant, The Sword, and the Arm of the Lord surrenders to federal authorities in Arkansas after a two-day government siege.
September 14 » Penang Bridge, the longest bridge in Malaysia, connecting the island of Penang to the mainland, opens to traffic.
October 1 » Israel-Palestinian conflict: Israel attacks the Palestine Liberation Organization headquarters in Tunisia during "Operation Wooden Leg".
October 30 » Space Shuttle Challenger lifts off for mission STS-61-A, its final successful mission.
November 13 » The volcano Nevado del Ruiz erupts and melts a glacier, causing a lahar (volcanic mudslide) that buries Armero, Colombia, killing approximately 23,000 people.
December 20 » Pope John Paul II announces the institution of World Youth Day.
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/I110321.php : accessed September 25, 2026), "Pieter Boomsma (1897-1985)".
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