Ramadan is a special month of the year for over one billion Muslims throughout the world. It is a time for inner reflection, devotion to God, and self-control. Muslims think of it as a kind of tune-up for their spiritual lives. The ninth month of the Islamic calendar, which lasts 29 or 30 days. Muslims refrain from eating and drinking during daylight hours and is intended to teach Muslims about patience, spirituality, humility and submissiveness to God. - A Holy Day (month) Observance.