The temperature on May 26, 1915 was between 9.9 °C and 25.2 °C and averaged 17.7 °C. There was 13.7 hours of sunshine (85%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
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.
March 20 » Albert Einstein publishes his general theory of relativity.
May 6 » Babe Ruth, then a pitcher for the Boston Red Sox, hits his first major league home run.
June 9 » William Jennings Bryan resigns as Woodrow Wilson's Secretary of State over a disagreement regarding the United States' handling of the sinking of the RMSLusitania.
August 6 » World War I: Battle of Sari Bair: The Allies mount a diversionary attack timed to coincide with a major Allied landing of reinforcements at Suvla Bay.
August 27 » Attempted assassination of Bishop Patrick Heffron, bishop of the Diocese of Winona by Rev. Louis M. Lesches.
November 25 » Albert Einstein presents the field equations of general relativity to the Prussian Academy of Sciences.
Day of marriage August 5, 1940
The temperature on August 5, 1940 was between 13.4 °C and 25.4 °C and averaged 19.3 °C. There was 11.9 hours of sunshine (78%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. 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.
May 24 » Igor Sikorsky performs the first successful single-rotor helicopter flight.
May 25 » World War II: The German 2nd Panzer Division captures the port of Boulogne-sur-Mer; the surrender of the last French and British troops marks the end of the Battle of Boulogne.
June 4 » World War II: The Dunkirk evacuation ends: British forces complete evacuation of 338,000 troops from Dunkirk in France. To rally the morale of the country, Winston Churchill delivers, only to the House of Commons, his famous "We shall fight on the beaches" speech.
September 7 » World War II: The German Luftwaffe begins the Blitz, bombing London and other British cities for over 50 consecutive nights.
October 25 » Benjamin O. Davis Sr. is named the first African American general in the United States Army.
November 25 » World War II: First flights of both the de Havilland Mosquito and Martin B-26 Marauder.
Day of death May 21, 1977
The temperature on May 21, 1977 was between 7.0 °C and 16.8 °C and averaged 11.5 °C. There was 1.7 mm of rain during 2.2 hours. There was 2.1 hours of sunshine (13%). The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
February 18 » The Space Shuttle Enterprise test vehicle is carried on its maiden "flight" on top of a Boeing 747.
March 4 » The 1977 Vrancea earthquake in eastern and southern Europe kills more than 1,500, mostly in Bucharest, Romania.
May 25 » Star Wars (retroactively titled Star Wars: Episode IV – A New Hope) is released in theaters.
October 7 » The Fourth Soviet Constitution is adopted.
November 20 » Egyptian President Anwar Sadat becomes the first Arab leader to officially visit Israel, when he meets Israeli prime minister Menachem Begin and speaks before the Knesset in Jerusalem, seeking a permanent peace settlement.
December 4 » Malaysian Airline System Flight 653 is hijacked and crashes in Tanjong Kupang, Johor, killing 100.
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/I120463.php : accessed December 29, 2025), "Jan de Haan (1915-1977)".
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