More than 20 Mt. Diablo district schools are joining together for the first ever district-wide music festival May 15 at the Concord Pavilion (aka the Sleep Train Pavilion). Hear a choir of 500 elementary students, Concord High’s award-winning jazz ensemble, College Park’s incredible orchestra and more at this fundraiser to help save music programs at Mt. Diablo’s cash-strapped schools. The show begins at 2 p.m. Tickets are $6 for kids, $12 for adults.