Not even water? No, not even water. I feel like fasting Muslims should buy merchandise with this phrase so they can point to it as needed. Ramadan is the ninth month in the Islamic calendar. It marks a 29- to 30-day period — depending on when the next moon is sighted, signalling the beginning of a new month — in which observing Muslims abstain from eating or drinking between the Fajr prayer (which occurs when dawn breaks) and the Maghrib prayer (which occurs when the sun is fully set).