Calendar* Clarification: Tony Bennett's "Boulevard Of Broken Dreams"

Some websites report that Tony Bennett recorded his first song, "Boulevard Of Broken Dreams", on April 17, 1962, as if he completed it in one day.  Bennett finished the song on April 20, according to the book All the Things You Are:  The Life of Tony Bennett by David Evanier.  The correct and professional way to say it is that Bennett began recording the song on April 17.