January 18 » An X-ray generating machine is exhibited for the first time by H. L. Smith.
June 4 » Henry Ford completes the Ford Quadricycle, his first gasoline-powered automobile, and gives it a successful test run.
June 28 » An explosion in the Newton Coal Company's Twin Shaft Mine in Pittston, Pennsylvania results in a massive cave-in that kills 58 miners.
November 17 » The Western Pennsylvania Hockey League, which later became the first ice hockey league to openly trade and hire players, began play at Pittsburgh's Schenley Park Casino.
December 10 » Alfred Jarry's Ubu Roi premieres in Paris. A riot breaks out at the end of the performance.
December 14 » The Glasgow Underground Railway is opened by the Glasgow District Subway Company.
Day of marriage May 1, 1920
The temperature on May 1, 1920 was between 3.3 °C and 16.7 °C and averaged 10.9 °C. There was 0.2 mm of rain. There was 4.9 hours of sunshine (33%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southeast. 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 19 » The United States Senate votes against joining the League of Nations.
May 3 » A Bolshevik coup fails in the Democratic Republic of Georgia.
May 29 » The Louth flood of 1920 was a severe flash flooding in the Lincolnshire market town of Louth which occurred 29 May 1920, resulting in 23 fatalities in 20 minutes. It has been described as one of the most significant flood disasters in Britain during the 20th century.
August 15 » Polish–Soviet War: Battle of Warsaw, so-called Miracle at the Vistula.
August 19 » The Tambov Rebellion breaks out, in response to the Bolshevik policy of Prodrazvyorstka.
August 25 » Polish–Soviet War: Battle of Warsaw, which began on August 13, ends with the Red Army's defeat.
Day of death October 20, 1988
The temperature on October 20, 1988 was between 9.3 °C and 14.3 °C and averaged 12.0 °C. There was 2.6 mm of rain during 5.5 hours. The almost completely overcast was. The average windspeed was 1 Bft (weak wind) and was prevailing from the east. Source: KNMI
In The Netherlands , there was from Tuesday, November 4, 1986 to Tuesday, November 7, 1989 the cabinet Lubbers II, with Drs. R.F.M. Lubbers (CDA) as prime minister.
February 12 » Cold War: The 1988 Black Sea bumping incident: The U.S. missile cruiser USSYorktown(CG-48) is intentionally rammed by the Soviet frigate Bezzavetnyy in the Soviet territorial waters, while Yorktown claims innocent passage.
March 13 » The Seikan Tunnel, the longest undersea tunnel in the world, opens between Aomori and Hakodate, Japan.
May 15 » Soviet–Afghan War: After more than eight years of fighting, the Soviet Army begins to withdraw 115,000 troops from Afghanistan.
August 21 » The 6.9 Mw Nepal earthquake shakes the Nepal–India border with a maximum Mercalli intensity of VIII (Severe), leaving 709–1,450 people killed and thousands injured.
November 19 » Serbian communist representative and future Serbian and Yugoslav president Slobodan Milošević publicly declares that Serbia is under attack from Albanian separatists in Kosovo as well as internal treachery within Yugoslavia and a foreign conspiracy to destroy Serbia and Yugoslavia.
December 1 » World AIDS Day was proclaimed worldwide by the UN member states.
When copying data from this family tree, please include a reference to the origin: Hans Opperman, "Family tree Opperman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-opperman/I3180.php : accessed February 19, 2026), "Trijntje Sinnema (1896-1988)".
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