March 14 » Pelican Island National Wildlife Refuge, the first national wildlife refuge in the US, is established by President Theodore Roosevelt.
April 29 » A landslide kills 70 people in Frank, in the District of Alberta, Canada.
May 29 » In the May Coup, Alexander I, King of Serbia, and Queen Draga, are assassinated in Belgrade by the Black Hand (Crna Ruka) organization.
June 16 » The Ford Motor Company is incorporated.
July 1 » Start of first Tour de France bicycle race.
August 18 » German engineer Karl Jatho allegedly flies his self-made, motored gliding airplane four months before the first flight of the Wright brothers.
Day of marriage October 20, 1927
The temperature on October 20, 1927 was between 3.5 °C and 13.0 °C and averaged 8.8 °C. There was 6.4 hours of sunshine (61%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
April 12 » Rocksprings, Texas was hit by an F5 tornado that destroyed 235 of the 247 buildings in the town and killed 72 townspeople and injured 205; third deadliest tornado in Texas history.
April 12 » Shanghai massacre of 1927: Chiang Kai-shek orders the Chinese Communist Party members executed in Shanghai, ending the First United Front.
May 20 » Treaty of Jeddah: The United Kingdom recognizes the sovereignty of King Ibn Saud in the Kingdoms of Hejaz and Nejd, which later merge to become the Kingdom of Saudi Arabia.
August 7 » The Peace Bridge opens between Fort Erie, Ontario and Buffalo, New York.
August 16 » The Dole Air Race begins from Oakland, California, to Honolulu, Hawaii, during which six out of the eight participating planes crash or disappear.
August 23 » Italian anarchists Sacco and Vanzetti are executed after a lengthy, controversial trial.
Day of death March 20, 1968
The temperature on March 20, 1968 was between 4.4 °C and 11.5 °C and averaged 8.0 °C. There was 0.2 mm of rain during 0.4 hours. There was 0.5 hours of sunshine (4%). The partly clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
January 5 » Alexander Dubček comes to power in Czechoslovakia, effectively beginning the "Prague Spring".
January 31 » Vietnam War: Viet Cong guerrillas attack the United States embassy in Saigon, and other attacks, in the early morning hours, later grouped together as the Tet Offensive.
April 4 » Apollo program: NASA launches Apollo 6.
April 11 » Assassination attempt on Rudi Dutschke, leader of the German student movement.
July 26 » Vietnam War: South Vietnamese opposition leader Trương Đình Dzu is sentenced to five years hard labor for advocating the formation of a coalition government as a way to move toward an end to the war.
December 9 » Douglas Engelbart gave what became known as "The Mother of All Demos", publicly debuting the computer mouse, hypertext, and the bit-mapped graphical user interface using the oN-Line System (NLS).
When copying data from this family tree, please include a reference to the origin: P. Senden, "Family tree Senden", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-senden/I2199.php : accessed January 15, 2026), "Maria Theresia/Senden Zenden (1903-1968)".
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