Today marks the day that Trayvon Benjamin Martin would have turned 21. Instead, he will perpetually be 17 years old, thanks to George Zimmerman, the Sanford, Florida, neighborhood watch captain who felt it was his duty to shoot and kill an unarmed Black teenager whose apparent crime was wearing a hoodie that made him “a suspicious person.” After nearly two months of no charges, Zimmerman was finally arrested. He was eventually acquitted, but Martin’s death sparked the Black Lives Matter movement, which describes itself as “a tactic to (re)build the Black liberation movement.”

On this day, we remember. On this day, we renew our vow to never forget.