Don't Know Why is a song written by Jesse Harris and popularized by Norah Jones
Don't Know Why may also refer to:
Albums Don't Know Why, a 2003 album by Harold Mabern Don't Know Why, a 1998 album by Trish Thuy Trang
Songs "I Don't Know Why", the first song on Evolve by Imagine Dragons "Don't Know Why" (SoundGirl song) "Don't Know Why", a song by Saves the Day "I Don't Know Why", a 1968 song by Stevie Wonder
See also Dunno Y... Na Jaane Kyon, a 2010 Indian film Dunno Y2... Life Is a Moment, its 2015 sequel