The temperature on November 14, 1911 was between 4.0 °C and 11.0 °C and averaged 6.9 °C. There was 6.5 hours of sunshine (73%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
May 21 » President of Mexico Porfirio Díaz and the revolutionary Francisco Madero sign the Treaty of Ciudad Juárez to put an end to the fighting between the forces of both men, concluding the initial phase of the Mexican Revolution.
June 22 » Mexican Revolution: Government forces bring an end to the Magonista rebellion of 1911 in the Second Battle of Tijuana.
July 1 » Germany despatches the gunship SMSPanther to Morocco, sparking the Agadir Crisis.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
July 24 » Hiram Bingham III re-discovers Machu Picchu, "the Lost City of the Incas".
September 18 » Russian Premier Pyotr Stolypin is shot at the Kiev Opera House.
Day of marriage May 4, 1943
The temperature on May 4, 1943 was between 3.9 °C and 18.4 °C and averaged 12.2 °C. There was 13.7 hours of sunshine (91%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
January 14 » World War II: Franklin D. Roosevelt and Winston Churchill begin the Casablanca Conference to discuss strategy and study the next phase of the war.
January 15 » World War II: The Soviet counter-offensive at Voronezh begins.
June 1 » BOAC Flight 777 is shot down over the Bay of Biscay by German Junkers Ju 88s, killing British actor Leslie Howard and leading to speculation that it was actually an attempt to kill British Prime Minister Winston Churchill.
September 6 » The Monterrey Institute of Technology is founded in Monterrey, Mexico as one of the largest and most influential private universities in Latin America.
November 28 » World War II: Tehran Conference: U.S. President Franklin D. Roosevelt, British Prime Minister Winston Churchill and Soviet Premier Joseph Stalin meet in Tehran, Iran, to discuss war strategy.
December 15 » World War II: The Battle of Arawe begins during the New Britain campaign.
When copying data from this family tree, please include a reference to the origin: Van Knippenberg, "Family tree Van Knippenberg", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-knippenberg/I1230.php : accessed February 1, 2026), "Dr. Theodoor Gerard Knippenberg (1911-)".
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