The Sac City Chamber of Commerce Main Street Design Committee is inviting holiday-lovers to join them tomorrow (Saturday) as they celebrate the Christmas season. The hour-long ceremony begins at 5 p.m. in Chautauqua Park with attendees being treated to hot chocolate, popcorn and other snacks. Children will have the chance to meet one of their favorite yuletide figures, Santa Claus, with photo opportunities available for families. The event concludes with the activation of the decorations in the park including the Avenue of Lights and the Christmas tree in the Chautauqua Building.