The temperature on August 11, 1915 was between 11.9 °C and 21.9 °C and averaged 17.0 °C. There was 6.7 hours of sunshine (45%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. 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.
February 8 » D. W. Griffith's controversial film The Birth of a Nation premieres in Los Angeles.
February 22 » World War I: The Imperial German Navy institutes unrestricted submarine warfare.
April 5 » Boxing challenger Jess Willard knocks out Jack Johnson in Havana, Cuba to become the Heavyweight Champion of the World.
May 22 » Lassen Peak erupts with a powerful force, the only volcano besides Mount St. Helens to erupt in the contiguous U.S. during the 20th century.
July 16 » At Treasure Island on the Delaware River in the United States, the First Order of the Arrow ceremony takes place and the Order of the Arrow is founded to honor American Boy Scouts who best exemplify the Scout Oath and Law.
August 15 » A story in New York World newspaper reveals that the Imperial German government had purchased excess phenol from Thomas Edison that could be used to make explosives for the war effort and diverted it to Bayer for aspirin production.
Day of marriage October 23, 1935
The temperature on October 23, 1935 was between -2.1 °C and 9.6 °C and averaged 3.5 °C. There was 9.2 hours of sunshine (90%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
February 28 » DuPont scientist Wallace Carothers invents nylon.
May 14 » The Constitution of the Philippines is ratified by a popular vote.
May 31 » A 7.7 Mw earthquake destroys Quetta in modern-day Pakistan killing 40,000.
June 10 » Chaco War ends: A truce is called between Bolivia and Paraguay who had been fighting since 1932.
June 11 » Inventor Edwin Armstrong gives the first public demonstration of FM broadcasting in the United States at Alpine, New Jersey.
September 2 » The Labor Day Hurricane, the most intense hurricane to strike the United States, makes landfall at Long Key, Florida, killing at least 400.
Day of death November 4, 2001
The temperature on November 4, 2001 was between 7.7 °C and 11.5 °C and averaged 10.3 °C. There was -0.1 mm of rain. There was 0.5 hours of sunshine (5%). The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-southwest. Source: KNMI
January 13 » An earthquake hits El Salvador, killing more than 800.
January 23 » Five people attempt to set themselves on fire in Beijing's Tiananmen Square, an act that many people later claim is staged by the Communist Party of China to frame Falun Gong and thus escalate their persecution.
February 18 » Sampit conflict: Inter-ethnic violence between Dayaks and Madurese breaks out in Sampit, Central Kalimantan, Indonesia, ultimately resulting in more than 500 deaths and 100,000 Madurese displaced from their homes.
May 25 » Erik Weihenmayer becomes the first blind person to reach the summit of Mount Everest, in the Himalayas, with Dr. Sherman Bull.
September 10 » Antônio da Costa Santos, mayor of Campinas, Brazil is assassinated.
October 7 » The U.S. invasion of Afghanistan begins with an air assault and covert operations on the ground.
When copying data from this family tree, please include a reference to the origin: Ronald van 't Hoff, "Family tree Van 't Hoff - Zondag - Bosch - de Zwaan - vd Kolk - Westhuis - Plomp", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-t-hoff/I28488.php : accessed February 25, 2026), "Ethel Marie Zondag (1915-2001)".
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