The temperature on June 30, 1909 was between 10.4 °C and 15.3 °C and averaged 12.5 °C. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
February 15 » The Flores Theater fire in Acapulco, Mexico kills 250.
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.
May 13 » The first Giro d'Italia starts from Milan. Italian cyclist Luigi Ganna will be the winner.
August 7 » Alice Huyler Ramsey and three friends become the first women to complete a transcontinental auto trip, taking 59 days to travel from New York, New York to San Francisco, California.
August 19 » The first automobile race at the Indianapolis Motor Speedway.
October 26 » An Jung-geun assassinates Japan's Resident-General of Korea.
When copying data from this family tree, please include a reference to the origin: Tess Janssen, "Family tree Janssen", database, Genealogy Online (https://www.genealogieonline.nl/janssen-stamboom/I237.php : accessed February 28, 2026), "Hendrikus Carolus Janssen (1909-)".
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