For Bach's 328th birthday in 2013, the number of participating musicians grew to 45 and spread to
Boston,
Cincinnati,
Miami, and
Montreal. In New York, a 17-piece chorus organized by Stephen J. Herschkorn and calling themselves "Untersingen: The Bach Edition" roamed the subways offering Bach to
straphangers. Henderson again armed musicians with Bach in the Subways Day cards to distribute to audiences while they performed, and New York's WQXR covered the festivities for a second year, this time offering a
Google Maps interactive map on their website, with pins detailing all New York performances. This, along with coverage from
Time Out New York, led to "Bach hopping' – fans travelled from performance to performance, taking pictures and shooting video. While beginning work on Bach in the Subways Day 2014, Henderson was approached by
Los Angeles-based classical music enthusiast and photographer Jeehyun Lee, who was interested in organizing Bach in the Subways Day in Los Angeles. This was the first time an organizer other than Henderson worked on Bach in the Subways Day, and marked the beginning of an inflection point in the growth of the movement. Bach in the Subways Day 2014 was joined by 77 musicians in 12 cities in 4 countries, including 22 performers organized by Lee in Los Angeles, and a quartet of three cellos and a tuba on a moving subway train in
Taipei. It was the first year a Bach in the Subways website offered Google map pins and listings for all the performances. In the months following Bach in the Subways Day 2014, Henderson was contacted by amateur and professional musicians as well as musical organizations in
Seattle,
Tokyo,
Seoul,
Singapore, and cities in
Germany, all interested in organizing Bach in the Subways Day in their cities. In addition Henderson and Seattle organizer Rob Solomon, a professional anesthesiologist and amateur pianist and Bach lover, began a global email outreach campaign to invite musicians across the world to join Bach in the Subways Day 2015. On March 21, 2015, Johann Sebastian Bach's 330th birthday, thousands of musicians in 130 cities in 40 countries participated in the fifth Bach in the Subways Day. ==Notable Bach in the Subways Day 2015 performances==