UAE has announced in grief the death of Sheikh Khalifa bin Zayed Al Nahyan on Friday, May 13, it also declared 40 days of mourning while the private sector said to observe 3 days of mourning, Khaleej Times reported . Sheikh Khalifa bin Zayed Al Nahyan is UAE President and Ruler of Abu Dhabi. BREAKING: UAE President Sheikh Khalifa bin Zayed Al Nahyan has died — The Spectator Index (@spectatorindex) ...