During Ramadan, is against the law to eat, drink or smoke in public during daylight hours, even for non-Muslims. Although westerners are not required to fast, they must observe the public ban and eat, drink and smoke in private. In keeping with the religious purpose of the period, dress and personal conduct should be especially conservative. Ramadan is a very difficult period for the Arabs as they change their way of life for almost a month. Shops and businesses typically stay closed all day, but may open after sunset.