The International Day of Happiness is celebrated throughout the world on March 20. It was founded by United Nations during 2012, when all 193 member states of the United Nations General Assembly unanimously adopted the resolution.
Assembly,[…] Conscious that the pursuit of happiness is a
fundamental human goal. . . 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.