February 23 » Cuba leases Guantánamo Bay to the United States "in perpetuity".
March 14 » Pelican Island National Wildlife Refuge, the first national wildlife refuge in the US, is established by President Theodore Roosevelt.
June 11 » A group of Serbian officers stormed the royal palace and assassinated King Alexander Obrenović and his wife, Queen Draga.
June 16 » Roald Amundsen leaves Oslo, Norway, to commence the first east–west navigation of the Northwest Passage.
August 18 » German engineer Karl Jatho allegedly flies his self-made, motored gliding airplane four months before the first flight of the Wright brothers.
December 14 » The Wright brothers make their first attempt to fly with the Wright Flyer at Kitty Hawk, North Carolina.
Day of marriage July 5, 1926
The temperature on July 5, 1926 was between 15.1 °C and 17.7 °C and averaged 16.6 °C. There was 14.4 mm of rain. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
June 28 » Mercedes-Benz is formed by Gottlieb Daimler and Karl Benz merging their two companies.
July 23 » Fox Film buys the patents of the Movietone sound system for recording sound onto film.
September 25 » The international Convention to Suppress the Slave Trade and Slavery is first signed.
October 31 » Last issue of the independent Italian newspaper Il Mondo, thereafter suppressed by the Mussolini regime
November 15 » The NBC radio network opens with 24 stations.
November 25 » The deadliest November tornado outbreak in U.S. history kills 76 people and injures more than 400.
Day of death September 3, 1963
The temperature on September 3, 1963 was between 12.5 °C and 14.8 °C and averaged 13.3 °C. There was 16.8 mm of rain during 7.0 hours. The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
April 21 » The first election of the Universal House of Justice is held, marking its establishment as the supreme governing institution of the Bahá'í Faith.
May 2 » Berthold Seliger launches a rocket with three stages and a maximum flight altitude of more than 100 kilometres near Cuxhaven. It is the only sounding rocket developed in Germany.
July 7 » Buddhist crisis: The police of Ngô Đình Nhu, brother and chief political adviser of President Ngo Dinh Diem, attacked a group of American journalists who were covering a protest.
October 9 » In Italy, a large landslide a causes a giant wave to overtop the Vajont Dam, killing over 2,000.
December 8 » Pan Am Flight 214, a Boeing 707, is struck by lightning and crashes near Elkton, Maryland, killing all 81 people on board.
December 10 » Zanzibar gains independence from the United Kingdom as a constitutional monarchy, under Sultan Jamshid bin Abdullah.
When copying data from this family tree, please include a reference to the origin: Hans Opperman, "Family tree Opperman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-opperman/I2749.php : accessed January 24, 2026), "Petrus Andreas "Piet" Steijlen (1903-1963)".
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