The temperature on July 20, 1917 was between 10.0 °C and 20.3 °C and averaged 15.8 °C. There was 13.6 hours of sunshine (84%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
January 31 » World War I: Germany announces that its U-boats will resume unrestricted submarine warfare after a two-year hiatus.
April 9 » World War I: The Battle of Arras: The battle begins with Canadian Corps executing a massive assault on Vimy Ridge.
May 13 » Three children report the first apparition of Our Lady of Fátima in Fátima, Portugal.
June 23 » In a game against the Washington Senators, Boston Red Sox pitcher Ernie Shore retires 26 batters in a row after replacing Babe Ruth, who had been ejected for punching the umpire.
June 26 » World War I: The American Expeditionary Forces begin to arrive in France. They will first enter combat four months later.
November 24 » In Milwaukee, nine members of the Milwaukee Police Department are killed by a bomb, the most deaths in a single event in U.S. police history until the September 11 attacks in 2001.
Day of death June 20, 1973
The temperature on June 20, 1973 was between 15.1 °C and 26.1 °C and averaged 18.7 °C. There was -0.1 mm of rain. There was 7.5 hours of sunshine (45%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
In The Netherlands , there was from Thursday, July 20, 1972 to Friday, May 11, 1973 the cabinet Biesheuvel II, with Mr. B.W. Biesheuvel (ARP) as prime minister.
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
May 29 » Tom Bradley is elected the first black mayor of Los Angeles, California.
June 20 » Aeroméxico Flight 229 crashes on approach to Licenciado Gustavo Díaz Ordaz International Airport, killing all 27 people on board.
June 24 » The UpStairs Lounge, a gay bar in the French Quarter of New Orleans, Louisiana, is attacked by an arsonist during a church service, and 32 people die from smoke inhalation or fire.
July 11 » Varig Flight 820 crashes near Paris, France on approach to Orly Airport, killing 123 of the 134 on board. In response, the FAA bans smoking in airplane lavatories.
September 24 » Guinea-Bissau declares its independence from Portugal.
November 1 » The Indian state of Mysore is renamed as Karnataka to represent all the regions within Karunadu.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I21226.php : accessed February 1, 2026), "Dirk Jacobus de Beer (1917-1973)".
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