The Boston Red Sox will celebrate the Grateful Dead’s 50th anniversary on September 21 at historic Fenway Park as they face off against the Tampa Bay Rays.

With the purchase of a ticket to the game (which will be a special edition Grateful Dead-themed ticket), fans will receive a specially designed Red Sox Grateful Dead t-shirt. The shirt can be redeemed at the Yawkey Way team store.

In addition, Massachusetts-based Grateful Dead tribute act Fennario will perform pre-game beginning at 5:40 PM. Also, a portion of the proceeds from each ticket sold will go to the Rex Foundation, the official charity of the Grateful Dead. All ticketing information can be found here.