The most religious time of the year in Dubai, is the fast of Ramadan, which lasts approximately for one month. This is when Muslims fast during day-light hours to fulfil the fourth pillar of Islam. Tourists must be aware that during this period, eating, drinking and smoking is not permitted in public during the day, although some restaurants blackout their windows to allow people to consume in private. Also bars will not serve alcohol before 7pm and clubs are shut as no loud music is allowed.