June 17 » The College Board introduces its first standardized test, the forerunner to the SAT.
August 5 » Peter O'Connor sets the first IAAF recognised long jump world record of 24ft 11.75in (7.6137m), a record that would stand for 20 years.
September 2 » Vice President of the United States Theodore Roosevelt utters the famous phrase, "Speak softly and carry a big stick" at the Minnesota State Fair.
October 29 » Leon Czolgosz, the assassin of U.S. President William McKinley, is executed by electrocution.
November 8 » Gospel riots: Bloody clashes take place in Athens following the translation of the Gospels into demotic Greek.
November 27 » The U.S. Army War College is established.
Day of marriage December 21, 1938
The temperature on December 21, 1938 was between -11.6 °C and -8.6 °C and averaged -9.7 °C. There was 7.7 mm of rain during 12.5 hours. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
May 25 » Spanish Civil War: The bombing of Alicante kills 313 people.
June 7 » Second Sino-Japanese War: The Chinese Nationalist government creates the 1938 Yellow River flood to halt Japanese forces. Five hundred to nine hundred thousand civilians are killed.
June 7 » The Douglas DC-4E makes its first test flight.
July 20 » The United States Department of Justice files suit in New York City against the motion picture industry charging violations of the Sherman Antitrust Act in regards to the studio system. The case would eventually result in a break-up of the industry in 1948.
September 30 » Britain, France, Germany and Italy sign the Munich Agreement, whereby Germany annexes the Sudetenland region of Czechoslovakia.
October 14 » The first flight of the Curtiss P-40 Warhawk fighter plane.
Day of death July 3, 1966
The temperature on July 3, 1966 was between 10.8 °C and 23.6 °C and averaged 17.9 °C. There was 2.1 mm of rain during 0.7 hours. There was 7.7 hours of sunshine (46%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
February 2 » Pakistan suggests a six-point agenda with Kashmir after the Indo-Pakistani War of 1965.
February 28 » A NASA T-38 Talon crashes into the McDonnell Aircraft factory while attempting a poor-visibility landing at Lambert Field, St. Louis, killing astronauts Elliot See and Charles Bassett.
March 10 » Military Prime Minister of South Vietnam Nguyễn Cao Kỳ sacked rival General Nguyễn Chánh Thi, precipitating large-scale civil and military dissension in parts of the nation.
May 26 » British Guiana gains independence, becoming Guyana.
July 15 » Vietnam War: The United States and South Vietnam begin Operation Hastings to push the North Vietnamese out of the Vietnamese Demilitarized Zone.
When copying data from this family tree, please include a reference to the origin: R.A.Hemerik, "Descendants Hemerik-Broekhuizen-Huner-Koper-Barink", database, Genealogy Online (https://www.genealogieonline.nl/parenteel-hemerik/I141322.php : accessed February 20, 2026), "Johannes Kop (1901-1966)".
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