The United Nations Day of Happiness began in 2013, so this year will be the third time it has been celebrated.
The General Assembly of the United Nations in its resolution 66/281 document of 12 July 2012 proclaimed 20 March the International Day of Happiness recognizing the relevance of happiness and well-being as universal goals and aspirations in the lives of human beings around the world and the importance of their recognition in public policy objectives.
The United Nations invites Member States, 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.
Scientology would like you to think their booklet The Way to Happiness is somehow a part of that. It’s not, but they have a custom cover to celebrate the Day of Happiness, with the unusual tag line. A Common Sense Guide to Corporate Ethics. Packs of 12 are available for $24.