Haags Gemeentearchief Ambtenaar van de burgerlijke stand van de gemeente 's-Gravenhage, 's-Gravenhage, archief 335-01, inventarisnummer 517, 30-01-1912, Nadere toegang op het geboorteregister van de gemeente 's-Gravenhage, aktenummer 591
The temperature on January 28, 1912 was between -8.7 °C and 4.5 °C and averaged -2.6 °C. There was 0.2 mm of rain. There was 6.2 hours of sunshine (70%). The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
February 14 » Arizona is admitted as the 48th and the last contiguous U.S. state.
August 14 » U.S. Marines invade Nicaragua to support the U.S.-backed government installed there after José Santos Zelaya had resigned three years earlier.
October 7 » The Helsinki Stock Exchange sees its first transaction.
November 7 » The Deutsche Opernhaus (now Deutsche Oper Berlin) opens in the Berlin neighborhood of Charlottenburg, with a production of Beethoven's Fidelio.
When copying data from this family tree, please include a reference to the origin: R.A.Hemerik, "Descendants Hemerik-Broekhuizen-Huner-Koper-Barink", database, Genealogy Online (https://www.genealogieonline.nl/parenteel-hemerik/I168326.php : accessed February 15, 2026), "Willem Christiaan de Greef (1912-)".
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