Make Music Day, the annual global celebration featuring more than 3,000 free, outdoor music making events in the United States, returns tomorrow – June 21. The daylong event, which affirms the transformative power of music in our lives, will be experienced by millions of people in over 38 U.S. cities including New York City, Los Angeles, Chicago, Boston, Nashville, San Diego, Seattle, Portland (OR), Madison (WI), Philadelphia, Detroit, Denver, Cleveland, Washington, D.C., St. Louis, Chattanooga, Minneapolis/St.