You don’t know what to do today? Go get your best friend and celebrate with her National Girlfriends Day. This holiday celebrates friendships and relationships annually on August 1. The concept was launched by two women, Allie Savarino and Sally Rodgers on sisterwoman.com. No wonder that such an event has made waves on the web. But this year, tweets have made the event quite different, turning it into a bash for singleness.