The Islamic holy month of Ramadan begins Nov. 6 and will last through Dec. 5. It is the most important period on the Muslim calendar and is observed by abstaining from food, drink, tobacco and sex from dawn till dusk. While foreigners are not expected to observe these restrictions, travelers can expect some restaurants and cafes to be closed in countries like Indonesia and Turkey. But tourist attractions and businesses will generally remain open in the bigger cities. Stricter countries like Saudia Arabia will Expect more discretion from foreigners, and many businesses will be closed.