2013 The first International Day of Happiness was celebrated and launched with Ndaba Mandela, grandson of the late President of South Africa Nelson Mandela and Chelsea Clinton, daughter of US President Bill Clinton and US Senator and Democratic Presidential candidate Hillary Clinton at the TedXTeen conference in New York, NY. The United Nations and the United Nations Foundation also held ceremonies and celebrations.
2014 The second International Day of Happiness was promoted by Pharrell Williams and the United Nations Foundation with the world's first 24 - hour music video to the song "Happy". Global citizens around the world were called upon to make their own music video to the song to make the first ever globally crowdsourced 24 hour global music video.
2015 The third International Day of Happiness was promoted by Pharrell Williams, the United Nations and the United Nations Foundation among other global campaigns. Pharrell Williams made a speech at the United Nations General Assembly where he proclaimed "Happiness is your birthright" and asked for action on climate change. Google created a home page takeover which received more than 3. 5 billion impressions. Google also initiated a campaign where Pharrell would pop up at random and dance in their google hangouts feature.
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