The temperature on April 1, 1911 was between 0.7 °C and 14.2 °C and averaged 6.6 °C. There was 5.6 hours of sunshine (43%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
April 6 » During the Battle of Deçiq, Dedë Gjon Luli Dedvukaj, leader of the Malësori Albanians, raises the Albanian flag in the town of Tuzi, Montenegro, for the first time after George Kastrioti (Skanderbeg).
May 15 » In Standard Oil Co. of New Jersey v. United States, the United States Supreme Court declares Standard Oil to be an "unreasonable" monopoly under the Sherman Antitrust Act and orders the company to be broken up.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
August 29 » The Canadian Naval Service becomes the Royal Canadian Navy.
September 7 » French poet Guillaume Apollinaire is arrested and put in jail on suspicion of stealing the Mona Lisa from the Louvre museum.
Day of marriage May 27, 1935
The temperature on May 27, 1935 was between 11.7 °C and 21.7 °C and averaged 17.3 °C. There was 0.4 mm of rain during 0.5 hours. There was 6.9 hours of sunshine (43%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
February 20 » Caroline Mikkelsen becomes the first woman to set foot in Antarctica.
February 26 » Robert Watson-Watt carries out a demonstration near Daventry which leads directly to the development of radar in the United Kingdom.
August 14 » Franklin D. Roosevelt signs the Social Security Act, creating a government pension system for the retired.
August 15 » Will Rogers and Wiley Post are killed after their aircraft develops engine problems during takeoff in Barrow, Alaska.
August 31 » In an attempt to stay out of the growing tensions concerning Germany and Japan, the United States passes the first of its Neutrality Acts.
September 30 » The Hoover Dam, astride the border between the U.S. states of Arizona and Nevada, is dedicated.
Day of death February 21, 1991
The temperature on February 21, 1991 was between 0.1 °C and 7.4 °C and averaged 2.6 °C. There was -0.1 mm of rain. The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south. Source: KNMI
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
When copying data from this family tree, please include a reference to the origin: Jan Kaper, "Family tree Kaper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaper/I13402.php : accessed March 12, 2026), "Berendje Olthof (1911-1991)".
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