I overheard someone mentioning this song. Apparently it’s a golden oldie predating by some years the song “Turn, Turn, Turn”, relevant because. . . .
Apparently the some of the lyrics have something to the effect of “I turn around and she’s five” for example. Anyway, the father/narrator mentions several times that “he turns around and she’s [some age]” as she is growin up so quickly.
Those are all the details I know. (The fellow in question mentioned using it as a background song for a photo montage of his daughter and her family.)
I believe it’s called “Turn Around”. It was written by Harry Belafonte (and a couple others) and has been recorded by several artists including Belafonte, the Kingston Trio, Sonny & Cher, and others.