David Muir, anchor of “ABC World News Tonight,” is set to deliver the keynote address to the more than 6,500 graduates expected to participate. Starting at noon, the ceremony is scheduled to last 75 minutes and will go on rain or shine. A ceremony at 5:30 p.m. Friday will recognize about 900 doctoral, master of fine arts and medical professional degree candidates who plan to participate at a Kohl Center ceremony.