Pharrell and the United Nations Foundation have put the concept of synergy into motion by teaming up for the second annual International Day of Happiness, which takes place tomorrow (March 20). The timing is perfect considering Pharrell's single "Happy" is currently dominating the Billboard charts, and his song is all about, well, happiness.

Their campaign is spearheaded by Pharrell's new website, 24 Hours of Happiness, where visitors can share their own moments of joy by uploading videos to YouTube and Instagram. Pharrell will be selecting his favorite submissions throughout the day, as well as encouraging his fans to donate to the UN's Central Emergency Response Fund. If you decide to do neither, at least spend the International Day of Happiness by watching Pharrell's 24-hour music video for "Happy." Not that you haven't already.

The International Day of Happiness technically starts at 8 p.m. (EST) tonight, so get to enjoying life now and remember to use the hashtag #HAPPYDAY online. For more information, visit here.

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