The temperature on May 20, 1978 was between 10.1 °C and 16.5 °C and averaged 12.3 °C. There was 2.5 hours of sunshine (16%). The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northwest. 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.
May 4 » The South African Defence Force attacks a SWAPO base at Cassinga in southern Angola, killing about 600 people.
May 12 » In Zaire, rebels occupy the city of Kolwezi, the mining center of the province of Shaba (now known as Katanga); the local government asks the US, France and Belgium to restore order.
July 7 » The Solomon Islands becomes independent from the United Kingdom.
August 10 » Three members of the Ulrich family are killed in an accident. This leads to the Ford Pinto litigation.
October 3 » A Finnish Air Force DC-3 crashes, killing all 15 people on board.
November 27 » The Kurdistan Workers' Party (PKK) is founded in the city of Riha (Urfa) in Turkey.
When copying data from this family tree, please include a reference to the origin: Hans Dunning, "Family tree Dunning", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-dunning/R4618.php : accessed January 4, 2026), "Geertje Zwolle (± 1900-1978)".
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