Per the suggestion of this NPR article about "What does your birth date song say about you?" I checked.
I went to This Day in Music and put in my birth date.
Sunshine on My Shoulders by John Denver.
True enough. Sunshine on my shoulders DOES make me happy and I didn't really appreciate it until I came to Colorado. And I do love John Denver. His songs are sometimes a little simplistic, but dammit, sometimes I want the world to be a little bit simplistic and a lot more positive!
(No, this is NOT silly... it was on NPR!)