The temperature on April 11, 1887 was about 10.1 °C. The air pressure was 4 kgf/m2 and came mainly from the east-northeast. The airpressure was 77 cm mercury. The atmospheric humidity was 62%. 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.
January 20 » The United States Senate allows the Navy to lease Pearl Harbor as a naval base.
February 23 » The French Riviera is hit by a large earthquake, killing around 2,000.
May 9 » Buffalo Bill Cody's Wild West Show opens in London.
July 26 » Publication of the Unua Libro, founding the Esperanto movement.
September 5 » A fire at the Theatre Royal, Exeter, kills 186.
November 11 » August Spies, Albert Parsons, Adolph Fischer and George Engel are executed as a result of the Haymarket affair.
Day of death June 18, 1963
The temperature on June 18, 1963 was between 13.2 °C and 17.6 °C and averaged 15.5 °C. There was 14.4 mm of rain during 7.5 hours. There was 1.1 hours of sunshine (7%). The almost completely overcast was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
February 5 » The European Court of Justice's ruling in Van Gend en Loos v Nederlandse Administratie der Belastingen establishes the principle of direct effect, one of the most important, if not the most important, decisions in the development of European Union law.
February 12 » Construction begins on the Gateway Arch in St. Louis, Missouri.
June 5 » The British Secretary of State for War, John Profumo, resigns in a sex scandal known as the "Profumo affair".
November 1 » The 1963 South Vietnamese coup begins.
November 1 » The Arecibo Observatory in Arecibo, Puerto Rico, with the largest radio telescope ever constructed, officially opens.
November 29 » U.S. President Lyndon B. Johnson establishes the Warren Commission to investigate the assassination of President John F. Kennedy.
When copying data from this family tree, please include a reference to the origin: C.M.J. Peterse, "Family tree Peterse", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-peterse/I333.php : accessed February 5, 2026), "Johannes Wilhelmus Clavaux (1887-1963)".
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