Most Moslem shop owners close early or do not open on Friday, and Christians follow similar rules on Sunday. However, the markets and street stalls downtown remain open all week long, and Friday is their busiest day of the week. During Ramadan , the Moslem holy month of fasting, business hours are shorter. Museums are generally open every day except Tuesday, but opening hours sometimes vary. To be safe, bring a multi-purpose adapter.
American equipment requires both an adapter and a transformer.
Most varieties of adapters and transformers are readily available in electrical shops throughout Jordan. Electrical current in Jordan is reliable and uninterrupted. Non-Islamic holidays are fixed, while Islamic holidays vary according to the lunar Moslem calendar. As the lunar Hijra calendar is 11 days shorter than the Gregorian calendar, each year Islamic holidays fall approximately 11 days earlier than the previous year. The precise dates are known only shortly before they fall, as they depend on the sighting of the moon.