The temperature on April 6, 1883 was about 8.9 °C. The air pressure was 12 kgf/m2 and came mainly from the north-northeast. The airpressure was 77 cm mercury. The atmospheric humidity was 59%. Source: KNMI
In The Netherlands , there was from August 20, 1879 to April 23, 1883 the cabinet Van Lijnden van Sandenburg, with Mr. C.Th. baron Van Lijnden van Sandenburg (conservatief-AR) as prime minister.
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 16 » The Pendleton Civil Service Reform Act, establishing the United States Civil Service, is enacted by Congress.
March 20 » The Paris Convention for the Protection of Industrial Property is signed.
March 28 » Tonkin Campaign: French victory in the Battle of Gia Cuc.
May 27 » Alexander III is crowned Tsar of Russia.
August 27 » Eruption of Krakatoa: Four enormous explosions destroy the island of Krakatoa and cause years of climate change.
October 20 » Peru and Chile sign the Treaty of Ancón, by which the Tarapacá province is ceded to the latter, bringing an end to Peru's involvement in the War of the Pacific.
Day of death April 25, 1981
The temperature on April 25, 1981 was between 4.5 °C and 13.5 °C and averaged 9.4 °C. There was 0.1 mm of rain during 0.1 hours. There was 0.2 hours of sunshine (1%). The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-southeast. 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.
March 26 » Social Democratic Party (UK) is founded as a party.
June 13 » At the Trooping the Colour ceremony in London, a teenager, Marcus Sarjeant, fires six blank shots at Queen Elizabeth II.
August 10 » Murder of Adam Walsh: The head of John Walsh's son is found. This inspires the creation of the television series America's Most Wanted and the National Center for Missing & Exploited Children.
November 23 » Iran–Contra affair: Ronald Reagan signs the top secret National Security Decision Directive 17 (NSDD-17), giving the Central Intelligence Agency the authority to recruit and support Contra rebels in Nicaragua.
November 25 » Pope John Paul II appoints Joseph Cardinal Ratzinger (the future Pope Benedict XVI) Prefect of the Congregation for the Doctrine of the Faith.
December 18 » First flight of the Russian heavy strategic bomber Tu-160, the world's largest combat aircraft, largest supersonic aircraft and largest variable-sweep wing aircraft built.
When copying data from this family tree, please include a reference to the origin: John en Jannie Anker, "Family tree Spijkerman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-spijkerman/I592.php : accessed January 19, 2026), "Roelof Koekoek (1883-1981)".
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