After conducting an in-depth study on how money affects relationships, Bank of America designated October 17 as National Pay Back a Friend Day. This study, which is called the “Friends Again Report,” found that 53% of its participants have ended a friendship after they loaned a friend money and were never paid back. As a way to combat this issue, National Pay Back a Friend Day was created. So on October 17, put away the bad feelings, pull up your mobile payment apps, and start paying your (ex) friends back.