In recent years, orchestra and concert-hall websites have been infected with a virus called What’s On. This is a style of divulging concert information that avoids the traditional calendar format and instead presents a horizontal or vertical dribble of events day by day. That works well enough if you are looking at the next few days of programming, but when you try to look ahead a month or two you often have to waste time clicking through week after week. For example, if you want to look at April events on the Elbphilharmonie website, you must first click on “What’s On,” then click on the current month, then click the arrow for April, then click on a particular date to see what’s happening. The website for the new Boulez Saal does offer a calendar option, but it works badly. You click on Concerts, then on Calendar View, then advance to April. But when you look at a particular event and then click the back arrow to return to the calendar, you lapse back into the initial format. You must click on Calendar View again and move to April again. This is intensely annoying. Why is it so difficult for organizations to put a clean, legible calendar on the main page? The LA Phil website should be a model. I click on Calendar, I hit the arrow for April, and all the info is right in front of me.