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.
February 19 » Egyptian forces raid Larnaca International Airport in an attempt to intervene in a hijacking, without authorisation from the Republic of Cyprus authorities. The Cypriot National Guard and Police forces kill 15 Egyptian commandos and destroy the Egyptian C-130 transport plane in open combat.
April 27 » The Saur Revolution begins in Afghanistan, ending the following morning with the murder of Afghan President Mohammed Daoud Khan and the establishment of the Democratic Republic of Afghanistan.
June 11 » Altaf Hussain founds the student political movement All Pakistan Muhajir Students Organisation (APMSO) in Karachi University.
October 21 » Australian civilian pilot Frederick Valentich vanishes over the Bass Strait south of Melbourne, after reporting contact with an unidentified aircraft.
November 14 » France conducts the Aphrodite nuclear test as 25th in the group of 29, 1975–78 French nuclear tests.
December 4 » Following the murder of Mayor George Moscone, Dianne Feinstein becomes San Francisco's first female mayor.
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 February 23, 2026), "Geertje Zwolle (± 1900-1978)".
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