11/9 may refer to:
November 9, US and Asian style date Fahrenheit 11/9, an American documentary film September 11, used in the day-month-year stylization of dates The September 11 attacks, a series of four coordinated terrorist attacks in the United States of America on September 11, 2001 September, 2011; see 2011 November, 2009; see 2009 September, 11 A.D.; see AD 11 November, 9 A.D.; see AD 9 11 shillings and 9 pence in UK predecimal currency "11/9", an episode of American Horror Story: Cult
See also September 11 attacks (disambiguation) 119 (disambiguation) 9/11 (disambiguation)