Plan to arrive anywhere from 10-30 minutes before concert time, so you can find your seat, silence off your cell phone, take a look at your surroundings, absorb the atmosphere, and have time to glance through the program book, too. Most concerts start on time. If you’re late, you may end up listening from the lobby! If that happens, the usher will allow you inside during a suitable pause in the program, so your arrival won’t disturb other concertgoers.