Endless Summer: A beloved concert film receives an eyepopping update Like fine wine, great film can improve with age — and that’s certainly the case for Jazz on a Summer’s Day.… This content is available to subscribers only. To continue reading, please login or start a FREE 14-Day Digital Subscription. Bundle your subscription with our award-winning print magazine here. Join Our Email Newsletter Join thousands of other jazz enthusiasts and get new music, artists, albums, events and more delivered to your inbox. Sign Up Now!