About the day » Monday December 20, 1909Calender converter

• Anna Catharina Driessens, Ekeren
• Ann Guzik Smith, Pennsylvania, United States († 1997)
• Adriaan Slager, Burgh († 2003)
• Allbert Streuding, Blijham, Groningen, Nederland († 1912)
• Aaldert Annes van Holland, Wageningen, Gelderland, Nederland († 1945)
• Anna Aldegonda Henriëtta van den Groenendael, Nederweert
• de Pagter, Dordrecht, Zuid-Holland, Nederland
• Adriana Hendrika Bertha SIMONIS, 's-Gravenhage, Zuid-Holland, Nederland († 2000)
• Alphonsus Asselman, Graauw en Langendam
• Alma Lee Jones († 1978)

• Arthur Vendigain Davies Berrington (76)
• Albertien Peeks (23), Groningen
• Alida Johanna Stam (56), den haag
• Antonius Johannes Iking (0), Leerdam, Nederland
• Antonia Jantina Haan (49), Nieuwe Pekela 75
• Barbara Van Praet (74), Burcht
• Antoine Jacques Clant van der Mijll (82), Veur
• Bernard Paulus Lötgerink (57), Enschede
• Bastiaan DUBBELDAM (77), Dubbeldam
• Anri Pieter Valk (64), Middelburg, Middelburg, Zeeland, Netherlands

• 1902 » Prince George, Duke of Kent († 1942)
• 1904 » Spud Davis, American baseball player, coach, and manager († 1984)
• 1904 » Yevgenia Ginzburg, Russian author († 1977)
• 1905 » Bill O'Reilly, Australian cricketer and sportscaster († 1992)
• 1907 » Paul Francis Webster, American soldier and songwriter († 1984)
• 1908 » Dennis Morgan, American actor and singer († 1994)
• 1909 » Vakkom Majeed, Indian journalist and politician († 2000)
• 1911 » Hortense Calisher, American author († 2009)
• 1914 » Harry F. Byrd Jr., American lieutenant, publisher, and politician († 2013)
• 1915 » Aziz Nesin, Turkish author and poet († 1995)

• 1893 » George C. Magoun, American businessman (b. 1840)
• 1915 » Upendrakishore Ray, Indian painter and composer (b. 1863)
• 1916 » Arthur Morgan, Australian politician, 16th Premier of Queensland (b. 1856)
• 1917 » Lucien Petit-Breton, French-Argentinian cyclist (b. 1882)
• 1919 » Philip Fysh, English-Australian politician, 12th Premier of Tasmania (b. 1835)
• 1920 » Linton Hope, English sailor and architect (b. 1863)
• 1921 » Julius Richard Petri, German microbiologist (b. 1852)
• 1927 » Frederick Semple, American golfer and tennis player (b. 1872)
• 1929 » Émile Loubet, French lawyer and politician, 8th President of France (b. 1838)
• 1935 » Martin O'Meara, Irish-Australian sergeant, Victoria Cross recipient (b. 1882)

• Koningin Wilhelmina (Huis van Oranje-Nassau) was from 1890 till 1948 sovereign of the Netherlands (also known as Koninkrijk der Nederlanden)
• In The Netherlands , there was from February 12, 1908 to August 29, 1913 the cabinet Heemskerk, with Mr. Th. Heemskerk (AR) as prime minister.
• The Netherlands had about 5.8 million citizens.
• January 16 » Ernest Shackleton's expedition finds the magnetic South Pole.
• January 28 » United States troops leave Cuba with the exception of Guantanamo Bay Naval Base after being there since the Spanish–American War.
• July 16 » Persian Constitutional Revolution: Mohammad Ali Shah Qajar is forced out as Shah of Persia and is replaced by his son Ahmad Shah Qajar.
• September 7 » Eugène Lefebvre crashes a new French-built Wright biplane during a test flight at Juvisy, south of Paris, becoming the first aviator in the world to lose his life in a powered heavier-than-air craft.
• November 18 » Two United States warships are sent to Nicaragua after 500 revolutionaries (including two Americans) are executed by order of José Santos Zelaya.
• December 14 » New South Wales Premier Charles Wade signs the Seat of Government Surrender Act 1909, formally completing the transfer of State land to the Commonwealth to create the Australian Capital Territory.

The temperature on December 20, 1909 was between -0.8 °C and 3.3 °C and averaged 1.2 °C. There was 2.0 mm of rain. There was 3.3 hours of sunshine (43%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest.