The temperature on June 30, 1927 was between 11.4 °C and 25.0 °C and averaged 17.8 °C. There was 4.5 mm of rain. There was 7.6 hours of sunshine (46%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
February 23 » German theoretical physicist Werner Heisenberg writes a letter to fellow physicist Wolfgang Pauli, in which he describes his uncertainty principle for the first time.
April 23 » Cardiff City defeat Arsenal in the FA Cup Final, the only time it has been won by a team not based in England.
April 27 » Carabineros de Chile (Chilean national police force and gendarmerie) are created.
July 10 » Kevin O'Higgins TD, Vice-President of the Executive Council of the Irish Free State is assassinated by the IRA.
August 19 » Patriarch Sergius of Moscow proclaims the declaration of loyalty of the Russian Orthodox Church to the Soviet Union.
November 13 » The Holland Tunnel opens to traffic as the first Hudson River vehicle tunnel linking New Jersey to New York City.
When copying data from this family tree, please include a reference to the origin: Erik Develter, "Family tree Erik Develter", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-erik-develter/I1658780729652991.php : accessed May 11, 2025), "André Henri Maertens (1927-1987)".
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