First Abu Dhabi Bank (FAB) is the UAE’s largest bank, offering customised banking services for corporate, investment, and personal needs. Formed by the merger of NBAD and FGB in 2017, FAB provides 24-hour internet banking and customer support, serving clients locally and globally. Ramadan timing Monday to Thursday and Saturday 10 AM – 2 PM & 9 PM – 12 AM ( All Service ) Friday 9 PM – 12 AM ( All Service ) Sunday closed.