This is a variable number. You need to state a start and/or end date or time.
9 days
How many days till march 9 2011
From the 11th of October 2011, when the question was originally asked, it was 29 days to the 9th of November 2011.
26 days
9 days
92 days.
December 18 - December 9 = 9 days.
30 days.
11 days from today, February 26, 2013.
108 days
11 days from today, February 26, 2013.
100 days.