January 8 » Herman Hollerith is issued US patent #395,791 for the 'Art of Applying Statistics' — his punched card calculator.
March 23 » The Ahmadiyya Muslim Community is established by Mirza Ghulam Ahmad in Qadian, British India.
March 31 » The Eiffel Tower is officially opened.
April 1 » The University of Northern Colorado was established, as the Colorado State Normal School.
May 11 » An attack upon a U.S. Army paymaster and escort results in the theft of over $28,000 and the award of two Medals of Honor.
November 14 » Pioneering female journalist Nellie Bly (aka Elizabeth Cochrane) begins a successful attempt to travel around the world in less than 80 days. She completes the trip in 72 days.
Day of marriage April 18, 1912
The temperature on April 18, 1912 was between 2.6 °C and 17.0 °C and averaged 10.2 °C. There was 11.7 hours of sunshine (83%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
January 6 » German geophysicist Alfred Wegener first presents his theory of continental drift.
February 12 » The Xuantong Emperor, the last Emperor of China, abdicates.
March 12 » The Girl Guides (later renamed the Girl Scouts of the USA) are founded in the United States.
June 30 » The Regina Cyclone, Canada's deadliest tornado event, kills 28 people in Regina, Saskatchewan.
September 28 » The Ulster Covenant is signed by some 500,000 Ulster Protestant Unionists in opposition to the Third Irish Home Rule Bill.
November 12 » The frozen bodies of Robert Scott and his men are found on the Ross Ice Shelf in Antarctica.
Day of death March 6, 1968
The temperature on March 6, 1968 was between -0.9 °C and 6.4 °C and averaged 3.3 °C. There was 5.6 mm of rain during 6.8 hours. There was 1.8 hours of sunshine (16%). The heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
January 23 » USS Pueblo (AGER-2) is attacked and seized by naval forces of North Korea.
January 30 » Vietnam War: Tet Offensive launch by forces of the Viet Cong and North Vietnamese Army against South Vietnam, the United States, and their allies.
March 2 » Baggeridge Colliery closes marking the end of over 300 years of coal mining in the Black Country.
March 7 » Vietnam War: The United States and South Vietnamese military begin Operation Truong Cong Dinh to root out Viet Cong forces from the area surrounding Mỹ Tho.
April 4 » Apollo program: NASA launches Apollo 6.
December 24 » Apollo program: The crew of Apollo 8 enters into orbit around the Moon, becoming the first humans to do so. They performed ten lunar orbits and broadcast live TV pictures.
Day of burial March 11, 1968
The temperature on March 11, 1968 was between 1.2 °C and 5.4 °C and averaged 3.0 °C. There was 2.3 mm of rain during 3.1 hours. There was 0.6 hours of sunshine (5%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
When copying data from this family tree, please include a reference to the origin: C. Blom, "Family tree Blom", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_blom/I781.php : accessed January 18, 2026), "Columba Groot (1889-1968)".
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