Since Ramadan is a lunar calendar month, it moves around the seasons, and obviously it's most fun during the winter, when the days are shorter, and least fun during the summer, when days are both long and hot. Fourth is Zakat, or almsgiving, in which non-poor Muslims are required to give a percentage of their income to the poor. And lastly, Hajj, the pilgrimage to Mecca that Muslims must try to fulfill at least once in their lives, provided they are healthy and have enough money. And there's also more to understanding Islam than just knowing the Quran. Like Judaism, with its Talmud, and Christianity, with its lives of saints and writings of church fathers, Islam has supplementary sacred texts, chief among which is the Hadith, a collection of sayings and stories about the prophet. Thanks Thought Bubble. Oh, it's time for the open letter?