It's an astronomical event, it's day of festivity since antiquity and and international day. How much do you really know about it? Let's put your knowledge to the test ...
Answer: New York
More information: The International Day of Happiness was launched in 2013 by Ndaba Mandela, the late Nelson Mandela's grandson and Chelsea Clinton, daughter of Bill and Hillary Clinton, at the TedXTeen conference in New York City.
More information: The 2018 World Happiness Report, which is related to the International Day of Happiness, ranked Finland as the happiest country on Earth followed respectively by Norway, Denmark and Iceland.
More information: The sun travels northward across the equator (from south to north) during the March equinox, while it does the opposite during its autumnal counterpart.
Answer: Ban Ki-Moon
More information: Korea's Ban Ki-moon was Secretary-General of the United Nations from 2007 to 2016 and strongly supported International Happiness Day during its inception.
More information: Easter is traditionally celebrated on the Sunday after the first full moon that occurs on or after the March equinox.
Answer: Sun Outages
More information: Sun outages occur before the vernal equinox in the Northern Hemisphere and after the vernal equinox in the Southern Hemisphere. This is due to satellites being directly positioned between the Earth and the sun.
Answer: Gross National Happiness
More information: The Buddhist kingdom of Bhutan is responsible for this development - Gross National Happiness - which has been adopted in various countries and cities around the world and laid the foundation for the International Day of Happiness.
More information: The autumnal equinox occurs in September and marks the beginning of the Fall season (in the Northern Hemisphere).
More information: The HappinessDay.org website is managed by the United Nations in conjunction with Jayme Illien, founder of the International Day of Happiness.
More information: UN resolution 66/281 recognized well-being as a universal goal and aspiration alongside happiness.