Post offices in Abu Dhabi, Al Ain, Ruwais and other towns in the Western Region are usually closed on Fridays and public holidays. Post office names in bold might be open Friday afternoon / evening and/or public holidays - check an Abu Dhabi newspaper for details of post office times the day before public holidays start.
Post office opening hours are reduced during Ramadan - 0900-1300 or 1600 and possibly 2100-2400 for some offices.
Collection of mail from PO Boxes should be available 24 hrs per day. Collection of large packets and registered mail depends on post office timings.
If you know of any post offices not in this list, please reply to the UAE post office topic with details.