The temperature on March 12, 1886 was about -5.3 °C. The air pressure was 4 kgf/m2 and came mainly from the northeast. The airpressure was 77 cm mercury. The atmospheric humidity was 90%. Source: KNMI
In The Netherlands , there was from April 23, 1884 to April 21, 1888 the cabinet Heemskerk, with Mr. J. Heemskerk Azn. (conservatief) as prime minister.
May 1 » Rallies are held throughout the United States demanding the eight-hour work day, culminating in the Haymarket affair in Chicago, in commemoration of which May 1 is celebrated as International Workers' Day in many countries.
May 8 » Pharmacist John Pemberton first sells a carbonated beverage named "Coca-Cola" as a patent medicine.
May 29 » The pharmacist John Pemberton places his first advertisement for Coca-Cola, which appeared in The Atlanta Journal.
June 30 » The first transcontinental train trip across Canada departs from Montreal, Quebec. It arrives in Port Moody, British Columbia on July 4.
July 3 » Karl Benz officially unveils the Benz Patent-Motorwagen, the first purpose-built automobile.
November 14 » Friedrich Soennecken first developed the hole puncher, a type of office tool capable of punching small holes in paper.
Day of marriage February 23, 1906
The temperature on February 23, 1906 was between -2.6 °C and 4.5 °C and averaged 0.9 °C. There was 0.4 hours of sunshine (4%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from August 17, 1905 to February 11, 1908 the cabinet De Meester, with Mr. Th. de Meester (unie-liberaal) as prime minister.
February 11 » Pope Pius X publishes the encyclical Vehementer Nos.
March 22 » The first England vs France rugby union match is played at Parc des Princes in Paris.
September 1 » The International Federation of Intellectual Property Attorneys is established.
September 7 » Alberto Santos-Dumont flies his 14-bis aircraft at Bagatelle, France for the first time successfully.
October 11 » San Francisco sparks a diplomatic crisis between the United States and Japan by ordering segregated schools for Japanese students.
November 24 » A 13–6 victory by the Massillon Tigers over their rivals, the Canton Bulldogs, for the "Ohio League" Championship, leads to accusations that the championship series was fixed and results in the first major scandal in professional American football.
Day of death December 11, 1966
The temperature on December 11, 1966 was between 2.4 °C and 6.8 °C and averaged 4.0 °C. There was 4.6 mm of rain during 2.6 hours. There was 2.2 hours of sunshine (28%). The partly or heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-southwest. Source: KNMI
January 10 » Tashkent Declaration, a peace agreement between India and Pakistan signed that resolved the Indo-Pakistani War of 1965.
February 28 » A NASA T-38 Talon crashes into the McDonnell Aircraft factory while attempting a poor-visibility landing at Lambert Field, St. Louis, killing astronauts Elliot See and Charles Bassett.
March 19 » 1965–66 Texas Western Miners men's basketball team wins the NCAA Division I Men's Basketball Tournament.
September 9 » The National Traffic and Motor Vehicle Safety Act is signed into law by U.S. President Lyndon B. Johnson.
November 8 » Former Massachusetts Attorney General Edward Brooke becomes the first African American elected to the United States Senate since Reconstruction.
November 15 » Project Gemini: Gemini 12 completes the program's final mission, when it splashes down safely in the Atlantic Ocean.
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/I65158.php : accessed January 29, 2026), "Harm Koops (1886-1966)".
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