The temperature on February 1, 1909 was between -4.1 °C and 2.6 °C and averaged 0.1 °C. There was 3.8 mm of rain. There was 2.8 hours of sunshine (31%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
March 23 » Theodore Roosevelt leaves New York for a post-presidency safari in Africa. The trip is sponsored by the Smithsonian Institution and National Geographic Society.
April 9 » The U.S. Congress passes the Payne–Aldrich Tariff Act.
April 14 » A massacre is organized by the Ottoman Empire against the Armenian population of Cilicia.
May 31 » The National Negro Committee, forerunner to the National Association for the Advancement of Colored People (NAACP), convenes for the first time.
July 25 » Louis Blériot makes the first flight across the English Channel in a heavier-than-air machine from Calais to Dover, England, United Kingdom in 37 minutes.
September 30 » The Cunard Line's RMS Mauretania makes a record-breaking westbound crossing of the Atlantic, that will not be bettered for 20 years.
Day of marriage July 6, 1949
The temperature on July 6, 1949 was between 10.3 °C and 18.8 °C and averaged 13.8 °C. There was 0.2 mm of rain during 0.1 hours. There was 6.6 hours of sunshine (40%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-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).
January 20 » Point Four Program a program for economic aid to poor countries announced by United States President Harry S. Truman in his inaugural address for a full term as President.
March 30 » Cold War: A riot breaks out in Austurvöllur square in Reykjavík, when Iceland joins NATO.
August 3 » The Basketball Association of America and the National Basketball League finalize the merger that would create the National Basketball Association.
August 10 » An amendment to the National Security Act of 1947 enhances the authority of the United States Secretary of Defense over the Army, Navy and Air Force, and replaces the National Military Establishment with the Department of Defense.
December 4 » Sir Duncan George Stewart was fatally stabbed by Rosli Dhobi, a member leader of the Rukun 13, in Sibu, Sarawak, Malaysia during the British crown colony era in that state.
December 27 » Indonesian National Revolution: The Netherlands officially recognizes Indonesian independence. End of the Dutch East Indies.
Day of death July 15, 1969
The temperature on July 15, 1969 was between 12.0 °C and 26.8 °C and averaged 20.2 °C. There was 14.7 hours of sunshine (90%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-southeast. Source: KNMI
July 16 » Apollo program: Apollo 11, the first mission to land astronauts on the Moon, is launched from the Kennedy Space Center at Cape Kennedy, Florida.
August 14 » The Troubles: British troops are deployed in Northern Ireland as political and sectarian violence breaks out, marking the start of the 37-year Operation Banner.
September 9 » In Canada, the Official Languages Act comes into force, making French equal to English throughout the Federal government.
September 14 » The US Selective Service selects September 14 as the First Draft Lottery date.
November 12 » Vietnam War: Independent investigative journalist Seymour Hersh breaks the story of the My Lai Massacre.
December 8 » Olympic Airways Flight 954 strikes a mountain outside of Keratea, Greece, killing 90 people in the worst crash of a Douglas DC-6 in history.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I79570.php : accessed February 15, 2026), "Derk Siebring (1909-1969)".
Copy warning
Genealogical publications are copyright protected. Although data is often retrieved from public archives, the searching, interpreting, collecting, selecting and sorting of the data results in a unique product. Copyright protected work may not simply be copied or republished.
Please stick to the following rules
Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
Do not use this data until you have checked it, preferably at the source (the archives).
State from whom you have copied the data and ideally also his/her original source.