The temperature on May 21, 1921 was between 2.0 °C and 19.1 °C and averaged 12.6 °C. There was 12.7 hours of sunshine (80%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 20 » The first Constitution of Turkey is adopted, making fundamental changes in the source and exercise of sovereignty by consecrating the principle of national sovereignty.
February 22 » After Russian forces under Baron Roman von Ungern-Sternberg drive the Chinese out, the Bogd Khan is reinstalled as the emperor of Mongolia.
February 25 » Georgian capital Tbilisi falls to the invading Russian forces after heavy fighting and the Russians declare the Georgian Soviet Socialist Republic.
March 24 » The 1921 Women's Olympiad begins in Monte Carlo, first international women's sports event.
March 31 » The Royal Australian Air Force is formed.
July 11 » The Red Army captures Mongolia from the White Army and establishes the Mongolian People's Republic.
Day of marriage May 15, 1951
The temperature on May 15, 1951 was between 6.3 °C and 11.3 °C and averaged 8.5 °C. There was 1.2 mm of rain during 1.8 hours. There was 0.3 hours of sunshine (2%). The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
In The Netherlands , there was from March 15, 1951 to September 2, 1952 the cabinet Drees I, with Dr. W. Drees (PvdA) as prime minister.
January 4 » Korean War: Chinese and North Korean forces capture Seoul.
February 6 » The Canadian Army enters combat in the Korean War.
February 13 » Korean War: Battle of Chipyong-ni, which represented the "high-water mark" of the Chinese incursion into South Korea, commences.
April 5 » Cold War: Ethel and Julius Rosenberg are sentenced to death for spying for the Soviet Union.
December 17 » The American Civil Rights Congress delivers "We Charge Genocide" to the United Nations.
December 31 » Cold War: The Marshall Plan expires after distributing more than US$13.3 billion in foreign aid to rebuild Western Europe.
Day of death August 1, 1971
The temperature on August 1, 1971 was between 10.4 °C and 24.9 °C and averaged 18.2 °C. There was 12.0 hours of sunshine (77%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south. Source: KNMI
January 12 » The Harrisburg Seven: Rev. Philip Berrigan and five other activists are indicted on charges of conspiring to kidnap Henry Kissinger and of plotting to blow up the heating tunnels of federal buildings in Washington, D.C.
March 18 » Peru: a landslide crashes into Yanawayin Lake, killing 200 people at the mining camp of Chungar.
September 9 » The four-day Attica Prison riot begins, eventually resulting in 39 dead, most killed by state troopers retaking the prison.
November 28 » Wasfi al-Tal, Prime Minister of Jordan, is assassinated by the Black September unit of the Palestine Liberation Organization.
December 2 » Abu Dhabi, Ajman, Fujairah, Sharjah, Dubai, and Umm al-Quwain form the United Arab Emirates.
December 4 » The Indian Navy attacks the Pakistan Navy and Karachi.
When copying data from this family tree, please include a reference to the origin: Wim Ackermans, "Family tree Ackermans", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ackermans/I424.php : accessed March 8, 2026), "Hendrikus "Henk" Portegies Zwart (1921-1971)".
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