The Shelby County Relay for Life, with the theme, 'Blast from the Past' will be held this evening, Friday, May 15 from 6 p.m. to midnight at the Shelby County Expo Center. Two traditions during the event will be the Survivor Lap at 7 p.m. and the Luminaria Ceremony at 9:30 p.m. The Relay for Life benefits the American Cancer Society.