The temperature on January 20, 1911 was between -0.1 °C and 3.5 °C and averaged 2.1 °C. The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
January 3 » A gun battle in the East End of London left two dead and sparked a political row over the involvement of then-Home Secretary Winston Churchill.
January 18 » Eugene B. Ely lands on the deck of the USSPennsylvania anchored in San Francisco Bay, the first time an aircraft landed on a ship.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
July 7 » The United States, UK, Japan, and Russia sign the North Pacific Fur Seal Convention of 1911 banning open-water seal hunting, the first international treaty to address wildlife preservation issues.
September 29 » Italy declares war on the Ottoman Empire.
November 17 » Omega Psi Phi fraternity was founded on the campus of Howard University in Washington, D.C.
Day of marriage March 1, 1934
The temperature on March 1, 1934 was between -4.4 °C and 6.8 °C and averaged 0.6 °C. There was 0.1 mm of rain. There was 7.5 hours of sunshine (69%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
February 16 » The Austrian Civil War ends with the defeat of the Social Democrats and the Republikanischer Schutzbund.
June 19 » The Communications Act of 1934 establishes the United States' Federal Communications Commission (FCC).
July 11 » Engelbert Zaschka of Germany flies his large human-powered aircraft, the Zaschka Human-Power Aircraft, about 20 meters at Berlin Tempelhof Airport without assisted take-off.
July 20 » Labor unrest in the U.S.: Police in Minneapolis fire upon striking truck drivers, during the Minneapolis Teamsters Strike of 1934, killing two and wounding sixty-seven.
September 18 » The Soviet Union is admitted to the League of Nations.
October 16 » Chinese Communists begin the Long March to escape Nationalist encirclement.
When copying data from this family tree, please include a reference to the origin: Henry van Niel, "Family tree Seijffer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-seijffer/R7.php : accessed January 18, 2026), "Henry Friedrich Eduard Seijffer (1911-2009)".
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