April 18 » The 7.5 Mw Guatemala earthquake shakes Guatemala with a maximum Mercalli intensity of VIII (Severe), killing between 800–2,000.
May 20 » Cuba gains independence from the United States. Tomás Estrada Palma becomes the country's first President.
May 31 » Second Boer War: The Treaty of Vereeniging ends the war and ensures British control of South Africa.
December 10 » The opening of the reservoir of the Aswan Dam in Egypt.
December 14 » The Commercial Pacific Cable Company lays the first Pacific telegraph cable, from San Francisco to Honolulu.
Day of death December 23, 1975
The temperature on December 23, 1975 was between 4.9 °C and 6.3 °C and averaged 5.6 °C. The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
April 3 » Bobby Fischer refuses to play in a chess match against Anatoly Karpov, giving Karpov the title of World Champion by default.
July 15 » Space Race: Apollo–Soyuz Test Project features the dual launch of an Apollo spacecraft and a Soyuz spacecraft on the first joint Soviet-United States human-crewed flight. It was both the last launch of an Apollo spacecraft, and the Saturn family of rockets.
July 31 » The Troubles: Three members of a popular cabaret band and two gunmen are killed during a botched paramilitary attack in Northern Ireland.
August 20 » Viking program: NASA launches the Viking 1 planetary probe toward Mars.
September 24 » Southwest Face expedition members become the first persons to reach the summit of Mount Everest by any of its faces, instead of using a ridge route.
When copying data from this family tree, please include a reference to the origin: Jolene Witkam, "Family tree Witkam", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-witkam/R98.php : accessed January 13, 2026), "Gerardus de die le Clercq (1902-1975)".
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