In what country did riots break out on Valentine’s in 2013, 2014, and 2015?

In what country did riots break out on Valentine’s in 2013, 2014, and 2015?
Your Kissing Routine Might Be Hurting Your Relationship

With Valentine’s Day approaching, don’t wait for the “right moment.
Most couples kiss on schedule—hello, goodbye, goodnight. But predictable affection quietly fades into background noise. One unexpected kiss can cut through routine and reignite connection. It’s the one your partner never sees coming.