Ramadan is a holy month of fasting and the precise date varies from year to year. If your trip to Jordan is during Ramadan, please be aware that eating, drinking and smoking in public places is very much discouraged during daylight hours, and alcohol will not be sold outside of the country’s larger hotels. The touring day will be considerably shortened, and most stores, banks and offices also adjust their opening hours (9:00 -14:00 is quite common).
There will still be restaurants open of course, especially in the tourist areas, but remember that it is considered very bad manners to be seen eating, drinking or smoking in public. Also, it might be a good idea to dress more modestly during this time. Some local women who do not normally cover their heads are known to do so during Ramadan, and perfumes and make-up are also sometimes given up during this month.