Ramadan (n.) Look up Ramadan at Dictionary.com
"ninth month of the Muslim year," 1590s, from Arabic Ramadan (Turkish and Persian ramazan), originally "the hot month," from ramida "be burnt, scorched" (cf. Hebrew remetz "hot ashes, embers"). Due to the Islamic lunar calendar, it passes through all seasons in a cycle of about 33 years, but evidently originally it was a summer month.