I'm only familiar with Peter Paul and Mary's version from their 1965 album "A Song Will Rise". It seems that their arrangement changes the meaning of the song entirely, with the last line "I wish to my soul it was Monday Morning"--which sounds like the young girl in a single day has discovered to her dismay what she has gotten herself into. Do others read this last line this way? Are there other versions of the song in which the girl expresses regret for her rashness?