January 18 » An X-ray generating machine is exhibited for the first time by H. L. Smith.
May 26 » Charles Dow publishes the first edition of the Dow Jones Industrial Average.
June 2 » Guglielmo Marconi applies for a patent for his wireless telegraph.
August 17 » Bridget Driscoll became the first recorded case of a pedestrian killed in a collision with a motor car in the United Kingdom.
August 30 » Philippine Revolution: After Spanish victory in the Battle of San Juan del Monte, eight provinces in the Philippines are declared under martial law by the Spanish Governor-General Ramón Blanco y Erenas.
September 21 » Anglo-Egyptian conquest of Sudan: British forces under the command of Horatio Kitchener take Dongola.
Day of death February 1, 1981
The temperature on February 1, 1981 was between -1.5 °C and 5.6 °C and averaged 2.1 °C. There was -0.1 mm of rain. The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
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.
In The Netherlands , there was from Friday, September 11, 1981 to Saturday, May 29, 1982 the cabinet Van Agt II, with Mr. A.A.M. van Agt (CDA) as prime minister.
January 15 » Pope John Paul II receives a delegation from Solidarity (Polish trade union) at the Vatican led by Lech Wałęsa.
August 12 » The IBM Personal Computer is released.
August 19 » Gulf of Sidra Incident: United States fighters intercept and shoot down two Libyan Sukhoi Su-22 fighter jets over the Gulf of Sidra.
August 22 » Far Eastern Air Transport Flight 103 disintegrates in mid-air and crashes in Sanyi Township, Miaoli County, Taiwan. All 110 people on board are killed.
October 20 » Two police officers and an armored car guard are killed during an armed robbery carried out by members of the Black Liberation Army and Weather Underground.
November 11 » Antigua and Barbuda joins the United Nations.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I449490.php : accessed February 26, 2026), "Wilhelmus Jacobus "Willem" Sebregts (1896-1981)".
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