View of Mac “Dr. John” Rebennack (b. 1940) performing at the 1983 New Orleans Jazz and Heritage Festival. He is seen playing piano and singing into a microphone that is set up over the instrument while wearing a longsleeve light-colored shirt with a vest and beret. According to the 1983 New Orleans Jazz and Heritage Festival program, Dr. John performed on Saturday, April 30 at 6 p.m. on Stage 1.