The Chieftains will perform on The Late Show with David Letterman tomorrow, March 13. The group is slated to perform “School Days Over” with special guests The Low Anthem. The indie-folk act is one of several guests on The Chieftains’ 50th anniversary album Voice of Ages. The Low Anthem will also support The Chieftains at New York’s Carnegie Hall on Saturday, March 17 night and join the band on CBS Sunday Morning a few hours later.