The date for the start of Ramadan is slightly different each year, depending on the position of the moon. Once Ramadan starts, Muslims should not eat or drink between dawn and sunset. This usually continues for thirty days, but sometimes twenty-nine days.Fasting is supposed to teach Muslims about patience and ibadah (faith). It is a time for Muslims to think about how the poor and homeless suffer without lots of food, it helps Muslims to be more obedient, and less greedy.