March 7 » Second Boer War: Boers, led by Koos de la Rey, inflict the biggest defeat upon the British since the beginning of the war, at Tweebosch.
April 2 » "Electric Theatre", the first full-time movie theater in the United States, opens in Los Angeles.
April 20 » Pierre and Marie Curie refine radium chloride.
May 31 » Second Boer War: The Treaty of Vereeniging ends the war and ensures British control of South Africa.
August 22 » Cadillac Motor Company is founded.
Day of death March 7, 1980
The temperature on March 7, 1980 was between 4.7 °C and 8.5 °C and averaged 6.6 °C. There was 9.1 mm of rain during 5.8 hours. There was -0.1 hours of sunshine (0%). The almost completely overcast was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
January 21 » Iran Air Flight 291 crashes in the Alborz Mountains while on approach to Mehrabad International Airport in Tehran, Iran, killing 128 people.
January 25 » Mother Teresa is honored with India's highest civilian award, the Bharat Ratna.
February 23 » Iran hostage crisis: Supreme Leader Ayatollah Ruhollah Khomeini states that Iran's parliament will decide the fate of the American embassy hostages.
April 2 » United States President Jimmy Carter signs the Crude Oil Windfall Profits Tax Act.
April 12 » The Americo-Liberian government of Liberia is violently deposed.
May 20 » In a referendum in Quebec, the population rejects, by 60% of the vote, a government proposal to move towards independence from Canada.
When copying data from this family tree, please include a reference to the origin: Van Knippenberg, "Family tree Van Knippenberg", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-knippenberg/I4037.php : accessed January 24, 2026), "Erich Anton Wilhelm Steffens (1902-1980)".
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