The leaders of the UAE wished everyone in the Emirates a happy and blessed Eid Al Fitr.
President Sheikh Khalifa received messages of congratulations from kings, presidents and emirs, state news agency Wam reported.
Sheikh Mohammed bin Rashid, Vice President and Ruler of Dubai, wished happiness, health and peace to all.
"Eid Mubarak to the people of the UAE and the rest of the Muslim world. May the days ahead bring us blessings, peace and prosperity," he wrote in a tweet.
Sheikh Mohamed bin Zayed, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the Armed Forces, prayed for "peace, prosperity and happiness".
"Eid Mubarak to the UAE President and Vice President, the Rulers of the Emirates, and the UAE people," he wrote on Twitter.
"We pray that this blessed time brings peace, prosperity and happiness to the people of our nation, the region and the world."
Sheikh Mohamed exchanged greetings by phone with King Salman of Saudi Arabia, King Mohammed VI of Morocco, President Kais Saied of Tunisia, and Crown Prince Mohammed bin Salman of Saudi Arabia.
Sheikh Mohamed also conveyed the greetings of Sheikh Khalifa and his wishes of well-being, prosperity and development for their countries.
The Rulers of the Emirates congratulated Sheikh Khalifa, Sheikh Mohammed and Sheikh Mohamed on the occasion of Eid Al Fitr
Sheikh Saud bin Saqr Al Qasimi of Ras Al Khaimah, Sheikh Dr Sultan bin Muhammad Al Qasimi of Sharjah, Sheikh Humaid bin Rashid Al Nuaimi of Ajman, Sheikh Hamad bin Mohammed Al Sharqi of Fujairah and Sheikh Saud bin Rashid Al Mualla of Umm Al Quwain expressed their wishes for more progress and prosperity for the UAE's people and Arab and Muslim nations.