The UAE started its march to International Happiness Day with a parade at City Walk in Dubai.
Hundreds of residents played their part in positive vibes by dressing up, donning Sheikh Zayed masks, or cheering on other revellers.
The Emirates was named the happiest country in the Arab world and 20th worldwide in this year's World Happiness Report.
UAE telecoms carriers Etisalat and du joined in Happiness Day cheer by displaying a "Happy UAE" message to mobile users.