The temperature on February 17, 1912 was between 4.7 °C and 13.7 °C and averaged 8.5 °C. There was 0.1 mm of rain. There was 4.6 hours of sunshine (46%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southeast. Source: KNMI
January 17 » British polar explorer Captain Robert Falcon Scott reaches the South Pole, one month after Roald Amundsen.
February 25 » Marie-Adélaïde, the eldest of six daughters of Guillaume IV, becomes the first reigning Grand Duchess of Luxembourg.
March 5 » Italo-Turkish War: Italian forces are the first to use airships for military purposes, employing them for reconnaissance behind Turkish lines.
May 8 » Paramount Pictures is founded.
June 30 » The Regina Cyclone, Canada's deadliest tornado event, kills 28 people in Regina, Saskatchewan.
October 17 » Bulgaria, Greece and Serbia declare war on the Ottoman Empire, joining Montenegro in the First Balkan War.
Day of marriage May 8, 1939
The temperature on May 8, 1939 was between 7.2 °C and 14.0 °C and averaged 11.0 °C. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from June 24, 1937 to July 25, 1939 the cabinet Colijn IV, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from July 25, 1939 to August 10, 1939 the cabinet Colijn V, with Dr. H. Colijn (ARP) as prime minister.
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.
January 24 » The deadliest earthquake in Chilean history strikes Chillán, killing approximately 28,000 people.
March 15 » Germany occupies Czechoslovakia.
September 1 » Switzerland mobilizes its forces and the Swiss Parliament elects Henri Guisan to head the Swiss Armed Forces (an event that can happen only during war or mobilization).
September 2 » World War II: Following the start of the invasion of Poland the previous day, the Free City of Danzig (now Gdańsk, Poland) is annexed by Nazi Germany.
December 12 » HMSDuchess sinks after a collision with HMSBarham off the coast of Scotland with the loss of 124 men.
December 27 » Winter War: Finland holds off a Soviet attack in the Battle of Kelja.
Day of death April 28, 1999
The temperature on April 28, 1999 was between 8.2 °C and 18.4 °C and averaged 12.4 °C. There was 11.8 hours of sunshine (80%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I121889.php : accessed October 16, 2026), "Roelf Datema (1912-1999)".
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