Best Day of My Life is a song by American Authors from the album Oh, What A Life. It was released on 2013 and was originally written by MICHAEL GOODMAN, DAVID M RUBLIN, MATTHEW JOHN SANCHEZ, SHEP GOODMAN, JAMES ADAM SHELLEY, ZACHARY MICHAEL BARNETT, AARON ACCETTA. Musically, the song is a Pop track and it has a tempo of 100 beats per minute.