The temperature on July 31, 1975 was between 15.7 °C and 28.1 °C and averaged 21.5 °C. There was 8.4 hours of sunshine (54%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. 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.
January 30 » The Monitor National Marine Sanctuary is established as the first United States National Marine Sanctuary.
March 26 » The Biological Weapons Convention comes into force.
April 30 » Fall of Saigon: Communist forces gain control of Saigon. The Vietnam War formally ends with the unconditional surrender of South Vietnamese president Dương Văn Minh.
October 14 » An RAF Avro Vulcan bomber explodes and crashes over Żabbar, Malta after an aborted landing, killing five crew members and one person on the ground.
November 11 » Independence of Angola.
December 2 » Laotian Civil War: The Pathet Lao seizes the Laotian capital of Vientiane, forces the abdication of King Sisavang Vatthana, and proclaims the Lao People's Democratic Republic.
When copying data from this family tree, please include a reference to the origin: B. Hoegee, "Family tree Hoegee", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-hoegee/I3362.php : accessed January 26, 2026), "Dirk Roukema (-1975)".
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