For the sixth annual time, Social Media Day was celebrated by thousands of people around the world on June 30.

Mashable started Social Media Day in 2010 as a way to reflect and honor the growth of social media and the digital revolution. Now in 2015, this holiday encompasses hundreds of in-person events around the world, along with thousands of tweets, Instagram photos and Facebook posts commemorating #SMDay.

Have a very happy Social Media Day, everyone! #SMDay

— Mashable SocialMedia (@mashsocialmedia) June 30, 2015 Read more…

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