Ramadan, which began on April 2, 2022, is the holiest month in the Islamic calendar. It was during this ninth month that Jibril (the archangel Gabriel in the Judeo-Christian faith) revealed the first verses of the Quran — Islam's holy text — to the Prophet Muhammad. The auspicious month's start is based on the appearance of the super-slim young crescent Moon, which generally appears one night after the new Moon.