Answer: Pharrell Williams
Pharrell Williams, in collaboration with the United Nations, promoted the International Day of Happiness in 2014. He did the same in 2015, which featured him giving a speech in front of the UN General Assembly.
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: New York
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.
UN resolution 66/281 recognized well-being as a universal goal and aspiration alongside happiness.
Currently, the sun appears to be within the constellation Pisces during the vernal equinox. However, due to shifts in the Earth's axis this changes every few thousand years, so in 2597 during the March equinox, it will instead appear to be part of Aquarius.
In the Northern Hemisphere, the vernal equinox marks the first day of Spring. However, in the Southern Hemisphere, this same date is the beginning of Fall.
Answer: Summer Solstice
The June or Summer solstice is considered to generally mark the end of Spring and signal the beginning of Summer.
Since its inception in 2017, the World Happiness Summit has taken place annually in Miami, Florida.
The March equinox is known as Nowruz in some parts of Europe and Asia and marks the beginning of the calendar year, specifically in places like Iran.
Easter is traditionally celebrated on the Sunday after the first full moon that occurs on or after the March equinox.