5 Science-Backed Strategies for More Happiness Several exercises to help you make the most of the International Day of Happiness. By Kira M. Newman March 18, 2016 Calm inna_astakhova/Dollar Photo Club Did you know that happiness has its own holiday? Four years ago, the General Assembly of the United Unlock this article for FREE. Keep Reading Log in to your Mindful account for uninterrupted access.