UAE/New Delhi: United Arab Emirates (UAE) President Sheikh Khalifa bin Zayed Al Nahyan passed away on Friday. According to the information received, President Zayed Al Nahyan was running ill for the past several days. His age was 73 years. After the death of the President, 40 days of national mourning has been announced by the government. The national flag will remain at half-mast for 40 days. Along with national mourning, a three-day holiday has been declared for all private and government sectors of the country.