February 6 » The Permanent Court of Arbitration, an international arbitration court at The Hague, is created when the Senate of the Netherlands ratifies an 1899 peace conference decree.
May 18 » The United Kingdom proclaims a protectorate over Tonga.
July 2 » Jean Sibelius' Finlandia receives its première performance in Helsinki with the Helsinki Philharmonic Society conducted by Robert Kajanus.
July 9 » The Governor of Shanxi province in North China orders the execution of 45 foreign Christian missionaries and local church members, including children.
July 29 » In Italy, King Umberto I of Italy is assassinated by the anarchist Gaetano Bresci.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of death April 30, 1971
The temperature on April 30, 1971 was between -1.6 °C and 11.9 °C and averaged 6.1 °C. There was 13.0 hours of sunshine (88%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
When copying data from this family tree, please include a reference to the origin: LvH, "Genealogy Van Eck op Goeree Overflakkee", database, Genealogy Online (https://www.genealogieonline.nl/genealogie-van-eck/I3016.php : accessed March 1, 2026), "Gerrit Jan HORDIJK (1900-1971)".
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