Sŵn Festival is a long running event in Cardiff. In recent years it has evolved to get with the times and has become a month-long event. On Saturday 21st of October Discovery Day will be taking place, a new name for part of the Sŵn Festival that is famous for the fact you have to dash around Cardiff with a wristband to experience the new music, new spaces, new venues and of course, new artists all in one big, fun day.