Stadsarchief Rotterdam te Rotterdam, BS Geboorte Burgerlijke Stand Rotterdam, geboorteakten, Rotterdam, archief 999-01, inventarisnummer 1912M, 1912, Nadere toegang op het geboorteregister van de gemeente Rotterdam, aktenummer 1912.8940, folio m124
Haags Gemeentearchief te Den Haag, BS Huwelijk Ambtenaar van de burgerlijke stand van de gemeente 's-Gravenhage, 's-Gravenhage, archief 0335-01, inventarisnummer 1174, 28-06-1940, Nadere toegang op het huwelijksregister van de gemeente 's-Gravenhage, aktenummer D340
The temperature on September 9, 1912 was between 6.8 °C and 14.0 °C and averaged 9.7 °C. There was 5.3 mm of rain. There was 5.3 hours of sunshine (40%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
March 6 » Italo-Turkish War: Italian forces become the first to use airships in war, as two dirigibles drop bombs on Turkish troops encamped at Janzur, from an altitude of 6,000 feet.
March 12 » The Girl Guides (later renamed the Girl Scouts of the USA) are founded in the United States.
October 17 » Bulgaria, Greece and Serbia declare war on the Ottoman Empire, joining Montenegro in the First Balkan War.
October 18 » First Balkan War: King Peter I of Serbia issues a declaration "To the Serbian People", as his country joins the war.
November 12 » The frozen bodies of Robert Scott and his men are found on the Ross Ice Shelf in Antarctica.
December 19 » William Van Schaick, captain of the steamship General Slocum which caught fire and killed over one thousand people, is pardoned by U.S. President William Howard Taft after 3⁄2 years in Sing Sing prison.
Day of marriage June 28, 1940
The temperature on June 28, 1940 was between 3.9 °C and 20.3 °C and averaged 13.4 °C. There was 11.5 hours of sunshine (69%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
February 29 » Finland initiates Winter War peace negotiations.
May 17 » World War II: Germany occupies Brussels, Belgium.
August 6 » Estonia is illegally annexed by the Soviet Union.
August 15 » An Italian submarine torpedoes and sinks the Greek cruiserElli at Tinos harbor during peacetime, marking the most serious Italian provocation prior to the outbreak of the Greco-Italian War in October.
September 12 » An explosion at the Hercules Powder Company plant in Kenvil, New Jersey kills 51 people and injures over 200.
September 19 » World War II: Witold Pilecki is voluntarily captured and sent to Auschwitz to smuggle out information and start a resistance movement.
When copying data from this family tree, please include a reference to the origin: Gert Jonker, "Family tree Jonker", database, Genealogy Online (https://www.genealogieonline.nl/jonker_stamboom/I23501.php : accessed March 6, 2026), "Maaike Fredrika Heller (1912-)".
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