Make Music Day, the annual global celebration featuring more than 3,000 free, outdoor musical events in the United States, returns this year on Tuesday, June 21. This day-long event will see the participation of over 35 U.S. cities - nearly twice as many as last year - hosting major events, including New York City, Los Angeles, Chicago, Boston, Nashville, Seattle, Portland (OR), Madison (WI), Philadelphia, Detroit, Denver, Cleveland, Washington DC, St. Louis, Chattanooga, Minneapolis/St.