The temperature on January 23, 1971 was between 4.0 °C and 12.0 °C and averaged 7.1 °C. There was 9.1 mm of rain during 10.0 hours. The almost completely overcast was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
February 27 » Doctors in the first Dutch abortion clinic (the Mildredhuis in Arnhem) start performing artificially-induced abortions.
July 5 » The Twenty-sixth Amendment to the United States Constitution, lowering the voting age from 21 to 18 years, is formally certified by President Richard Nixon.
July 30 » Apollo program: Apollo 15 Mission: David Scott and James Irwin on the Apollo Lunar Module Falcon land on the Moon with the first Lunar Rover.
September 4 » Alaska Airlines Flight 1866 crashes near Juneau, Alaska, killing all 111 people on board.
November 18 » Oman declares its independence from United Kingdom.
December 7 » The Battle of Sylhet is fought between the Pakistani military and the Mukti Bahini.
Day of death May 23, 1978
The temperature on May 23, 1978 was between 8.8 °C and 14.1 °C and averaged 10.5 °C. There was 0.9 hours of sunshine (6%). The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the 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.
March 16 » A Balkan Bulgarian Airlines Tupolev Tu-134 crashes near Gabare, Bulgaria, killing 73.
April 27 » Former United States President Nixon aide John D. Ehrlichman is released from an Arizona prison after serving 18 months for Watergate-related crimes.
May 3 » The first unsolicited bulk commercial email (which would later become known as "spam") is sent by a Digital Equipment Corporation marketing representative to every ARPANET address on the west coast of the United States.
July 25 » Birth of Louise Joy Brown, the first human to have been born after conception by in vitro fertilisation, or IVF.
August 10 » Three members of the Ulrich family are killed in an accident. This leads to the Ford Pinto litigation.
October 21 » Australian civilian pilot Frederick Valentich vanishes over the Bass Strait south of Melbourne, after reporting contact with an unidentified aircraft.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I80747.php : accessed January 18, 2026), "Henderikus "Erik" van Engen (1971-1978)".
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