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On 2月13日 1783, the Eighth Doctor, Anji Kapoor and Fitz Kreiner finally departed from the House on Henrietta Street. The Doctor had lived there for about a year. (PROSE: The Adventuress of Henrietta Street)
In 1918, 2月13日 was the last date skipped in Russia's transition from the Julian to Gregorian calendars. Cousin Anastasia incorporated it into the Thirteen-Day Republic. (PROSE: The Book of the War)