Ninth month of the Muslim year during which strict fasting is observed during daylight hours (7)
I believe the answer is:
ramadan
(Other definitions for ramadan that I've seen before include "Month in Muslim calendar" , "Muslim month of fasting from sunrise to sunset" , "Ninth month of Muslim year, a time of fasting" , "Moslem fast" , "The penitential ninth month of the Muslim year" .)