January 31 » Czechoslav Trade Union Association is founded in Prague.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
July 2 » British-Italian engineer Guglielmo Marconi obtains a patent for radio in London.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
December 9 » Activist Marguerite Durand founds the feminist daily newspaper La Fronde in Paris.
Day of death May 1, 1963
The temperature on May 1, 1963 was between 6.9 °C and 9.8 °C and averaged 8.1 °C. There was 11.7 mm of rain during 13.9 hours. The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 29 » The first inductees into the Pro Football Hall of Fame are announced.
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.
June 16 » Soviet Space Program: Vostok 6 mission: Cosmonaut Valentina Tereshkova becomes the first woman in space.
July 1 » ZIP codes are introduced for United States mail.
October 9 » In Italy, a large landslide a causes a giant wave to overtop the Vajont Dam, killing over 2,000.
December 14 » The dam containing the Baldwin Hills Reservoir bursts, killing five people and damaging hundreds of homes in Los Angeles, California.
When copying data from this family tree, please include a reference to the origin: W. Abas, "Family tree Abas", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-abas/I9753.php : accessed February 18, 2026), "Pieter Roelf Roelfsema (1897-1963)".
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