The temperature on August 31, 1910 was between 9.6 °C and 18.5 °C and averaged 14.5 °C. There was 1.5 mm of rain. There was 6.0 hours of sunshine (44%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
January 15 » Construction ends on the Buffalo Bill Dam in Wyoming, United States, which was the highest dam in the world at the time, at 325ft (99m).
April 12 » SMSZrínyi, one of the last pre-dreadnought battleships built by the Austro-Hungarian Navy, is launched.
June 25 » Igor Stravinsky's ballet The Firebird is premiered in Paris, bringing him to prominence as a composer.
July 16 » John Robertson Duigan makes the first flight of the Duigan pusher biplane, the first aircraft built in Australia.
September 20 » The ocean liner SSFrance, later known as the "Versailles of the Atlantic", is launched.
October 20 » The hull of the RMSOlympic, sister-ship to the ill-fated RMS Titanic, is launched from the Harland and Wolff shipyard in Belfast.
Day of marriage February 28, 1938
The temperature on February 28, 1938 was between 6.1 °C and 9.6 °C and averaged 8.7 °C. There was 3.5 mm of rain during 4.3 hours. The average windspeed was 5 Bft (very strong wind) and was prevailing from the southwest. Source: KNMI
February 18 » Second Sino-Japanese War: During the Nanking Massacre, the Nanking Safety Zone International Committee is renamed "Nanking International Rescue Committee", and the safety zone in place for refugees falls apart.
March 12 » Anschluss: German troops occupy and absorb Austria.
March 27 » Second Sino-Japanese War: The Battle of Taierzhuang begins, resulting several weeks later in the war's first major Chinese victory over Japan.
July 31 » Bulgaria signs a non-aggression pact with Greece and other states of Balkan Antanti (Turkey, Romania, Yugoslavia).
October 30 » Orson Welles broadcasts his radio play of H. G. Wells's The War of the Worlds, causing anxiety in some of the audience in the United States.
December 16 » Adolf Hitler institutes the Cross of Honour of the German Mother.
Day of death March 17, 1989
The temperature on March 17, 1989 was between -0.5 °C and 7.4 °C and averaged 3.3 °C. There was 17.2 mm of rain during 4.6 hours. There was 2.7 hours of sunshine (23%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from Tuesday, November 4, 1986 to Tuesday, November 7, 1989 the cabinet Lubbers II, with Drs. R.F.M. Lubbers (CDA) as prime minister.
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
January 6 » Satwant Singh and Kehar Singh are sentenced to death for conspiracy in the assassination of Prime Minister Indira Gandhi; the two men are executed the same day.
March 19 » The Egyptian flag is raised at Taba, marking the end of Israeli occupation since the Six Days War in 1967 and the Egypt–Israel Peace Treaty in 1979.
April 26 » People's Daily publishes the April 26 Editorial which inflames the nascent Tiananmen Square protests.
June 3 » The government of China sends troops to force protesters out of Tiananmen Square after seven weeks of occupation.
August 7 » U.S. Congressman Mickey Leland (D-TX) and 15 others die in a plane crash in Ethiopia.
November 10 » Germans begin to tear down the Berlin Wall.
When copying data from this family tree, please include a reference to the origin: Jan Kaper, "Family tree Kaper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaper/I4084.php : accessed February 14, 2026), "Roelf de Boer (1910-1989)".
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