U.S. Passport Applications, 1795-1925, Ancestry.com, National Archives and Records Administration (NARA); Washington D.C.; Roll #: 1570; Volume #: Roll 1570 - Certificates: 20250-20625, 16 Apr 1921-16 Apr 1921 / Ancestry.com
January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
February 9 » The Davis Cup competition is established.
February 28 » The Second Boer War: The 118-day "Siege of Ladysmith" is lifted.
June 14 » The second German Naval Law calls for the Imperial German Navy to be doubled in size, resulting in an Anglo-German naval arms race.
August 3 » The Firestone Tire and Rubber Company is founded.
October 19 » Max Planck discovers Planck's law of black-body radiation.
Day of marriage April 3, 1920
The temperature on April 3, 1920 was between 4.9 °C and 9.9 °C and averaged 7.2 °C. There was 1.2 hours of sunshine (9%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. 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.
April 28 » Azerbaijan is added to the Soviet Union.
July 29 » Construction of the Link River Dam begins as part of the Klamath Reclamation Project.
October 14 » Finland and Soviet Russia sign the Treaty of Tartu, exchanging some territories.
November 2 » In the United States, KDKA of Pittsburgh starts broadcasting as the first commercial radio station. The first broadcast is the result of the 1920 United States presidential election.
November 15 » The Free City of Danzig is established.
November 28 » Irish War of Independence: Kilmichael Ambush: The Irish Republican Army ambush a convoy of British Auxiliaries and kill seventeen.
Day of death March 10, 1948
The temperature on March 10, 1948 was between 3.5 °C and 12.8 °C and averaged 7.8 °C. There was 8.6 hours of sunshine (75%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
In The Netherlands , there was from July 3, 1946 to August 7, 1948 the cabinet Beel I, with Dr. L.J.M. Beel (KVP) as prime minister.
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).
January 7 » Kentucky Air National Guard pilot Thomas Mantell crashes while in pursuit of a supposed UFO.
May 28 » Daniel François Malan is elected as Prime Minister of South Africa. He later goes on to implement Apartheid.
June 28 » Cold War: The Tito–Stalin Split results in the expulsion of the League of Communists of Yugoslavia from the Cominform.
September 14 » The Indian Army captures the city of Aurangabad as part of Operation Polo.
September 18 » Operation Polo is terminated after the Indian Army accepts the surrender of the army of Hyderabad.
November 22 » Chinese Civil War: Elements of the Chinese Communist Second Field Army under Liu Bocheng trap the Nationalist 12th Army, beginning the Shuangduiji Campaign, the largest engagement of the Huaihai Campaign.
When copying data from this family tree, please include a reference to the origin: Charles Olson, "Olson's Tree", database, Genealogy Online (https://www.genealogieonline.nl/olsons-tree/P4281.php : accessed December 31, 2025), "Zelda Layne Sayre (1900-1948)".
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