Terry Jacks released this super-corn in 1973. I was ten. We liked to sing the alternative lyrics, "But the hills that we climbed were too rough on our behinds." Love this factoid from Wikipedia: "Jacks claimed on a VH1 special to have written "Seasons In The Sun" after a friend of his just died. The song was actually penned by Jacques Brel with the English translation by Rod McKuen."
The 70's were filled with this kind of musical pablum (And oh how we loved it!). Here as a bonus is another, from Paper Lace, 1974: