High Quality Content by WIKIPEDIA articles! The Xclamation Festival or X Fest is an annual festival that takes place on the streets of downtown Modesto, California from 9th to 12th between J and H Streets, usually on the first Saturday in August. Begun in 2000 and organized by Chris Ricci Presents, the day is characterized by a Mardi Gras atmosphere, concert performances that go into the late evening hours, and a motto of "Good Times, Downtown." The festival features 50 bands on 8 stages over the course of 8 hours.