The temperature on May 2, 1913 was between 6.9 °C and 13.5 °C and averaged 9.6 °C. There was 2.7 mm of rain. There was 3.8 hours of sunshine (25%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
In The Netherlands , there was from February 12, 1908 to August 29, 1913 the cabinet Heemskerk, with Mr. Th. Heemskerk (AR) as prime minister.
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
January 18 » First Balkan War: A Greek flotilla defeats the Ottoman Navy in the Naval Battle of Lemnos, securing the islands of the Northern Aegean Sea for Greece.
April 4 » First Balkan War: Greek aviator Emmanouil Argyropoulos becomes the first pilot to die in the Hellenic Air Force when his plane crashes.
May 29 » Igor Stravinsky's ballet score The Rite of Spring receives its premiere performance in Paris, France, provoking a riot.
June 24 » Greece and Serbia annul their alliance with Bulgaria.
July 12 » Serbian forces begin their siege of the Bulgarian city of Vidin; the siege is later called off when the war ends.
August 13 » First production in the UK of stainless steel by Harry Brearley.
Day of death September 17, 1970
The temperature on September 17, 1970 was between 10.0 °C and 18.2 °C and averaged 14.0 °C. There was 0.1 mm of rain during 0.2 hours. There was 4.8 hours of sunshine (38%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Yolande Harps, "Family tree Harps (Harp)", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-harps/I149.php : accessed February 26, 2026), "Roelof Johannes Harps (1913-1970)".
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