The temperature on August 29, 1911 was between 13.9 °C and 22.0 °C and averaged 17.8 °C. There was 0.6 mm of rain. There was 7.8 hours of sunshine (56%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
January 5 » Kappa Alpha Psi, the world's third oldest and largest black fraternity, is founded at Indiana University.
January 26 » Glenn Curtiss flies the first successful American seaplane.
April 27 » Following the resignation and death of William P. Frye, a compromise is reached to rotate the office of President pro tempore of the United States Senate.
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.
September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
September 29 » Italy declares war on the Ottoman Empire.
Day of marriage May 12, 1938
The temperature on May 12, 1938 was between 0.4 °C and 20.8 °C and averaged 12.6 °C. There was 12.9 hours of sunshine (83%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
January 3 » The March of Dimes is established as a foundation to combat infant polio by President Franklin D. Roosevelt.
March 3 » Oil is discovered in Saudi Arabia.
August 18 » The Thousand Islands Bridge, connecting New York, United States with Ontario, Canada over the Saint Lawrence River, is dedicated by U.S. President Franklin D. Roosevelt.
September 12 » Adolf Hitler demands autonomy and self-determination for the Germans of the Sudetenland region of Czechoslovakia.
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.
November 14 » The Lions Gate Bridge, connecting Vancouver to the North Shore region, opens to traffic.
Day of death December 23, 1999
The temperature on December 23, 1999 was between 2.8 °C and 8.5 °C and averaged 6.0 °C. There was 2.8 mm of rain during 2.2 hours. There was 3.5 hours of sunshine (45%). The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
March 12 » Former Warsaw Pact members the Czech Republic, Hungary and Poland join NATO.
March 28 » Kosovo War: Serb paramilitary and military forces kill 146 Kosovo Albanians in Izbica.
May 1 » SpongeBob SquarePants premieres on Nickelodeon.
May 29 » Space Shuttle Discovery completes the first docking with the International Space Station.
December 14 » Torrential rains cause flash floods in Vargas, Venezuela, resulting in tens of thousands of deaths, the destruction of thousands of homes, and the complete collapse of the state's infrastructure.
December 20 » Macau is handed over to China by Portugal.
When copying data from this family tree, please include a reference to the origin: Gert Jonker, "Family tree Jonker", database, Genealogy Online (https://www.genealogieonline.nl/jonker_stamboom/I8521.php : accessed January 28, 2026), "Willem van der Kooi (1911-1999)".
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