First Day of Spring and International Happiness!
Below is from Wikipedia:
The International Day of Happiness is celebrated throughout the world on the 20th of March. It was established by the United Nations General Assembly on 28 June 2012.
Assembly Resolution A/RES/66/281 states in pertinent part:
Balloons of Happiness
The General Assembly,[…] Conscious that the pursuit of happiness is a fundamental human goal,[…] Recognizing also the need for a more inclusive, equitable and balanced approach to economic growth that promotes sustainable development, poverty eradication, happiness and the well-being of all peoples, Decides to proclaim 20 March the International Day of Happiness, Invites all Member States, organizations of the United Nations system and other international and regional organizations, as well as civil society, including non-governmental organizations and individuals, to observe the International Day of Happiness in an appropriate manner, including through education and public awareness-raising activities[…]
—United Nations General Assembly, Resolution adopted by the General Assembly on 28 June 2012
The International Day of Happiness Resolution 65/309 was the result of the effort the Kingdom of Bhutan and its Gross National Happiness Initiative. 
This UN resolution marked the historical milestone of globalizing the Happiness Development Movement that started in 1972.