It's officially ARMY Day! BTS members V and Jimin extended their wishes to celebrate 12 years with the fandom. Read to know more. On July 9, BTS fans around the world celebrated ARMY Day by sharing personal stories and engaging in philanthropy. Every year on July 9, BTS and their fans around the world celebrate ARMY Day, a special occasion dedicated to the bond shared between BTS and their dedicated fanbase. BTS officially named their fan club "ARMY" on July 9, 2013. Each year, this day celebrates more than just an anniversary - it honours a deep, unbreakable bond between BTS and their fans that feels more like family than fandom.