From http://thepeachmusicfestival.com/2020-festival-update/ 
Dear Peach People,
Thank you for supporting The Peach Music Festival. We love our Peach family & hope you & your loved ones are safe. Out of an abundance of caution, we have decided to reschedule Peach 2020 & reunite on July 1 – 4, 2021. While we are disappointed to share this news, the health & safety of the entire Peach community is our top priority.
All Peach headlining acts will return in 2021 – Oysterhead, String Cheese Incident & Joe Russo’s Almost Dead. Fans can expect a very similar lineup to this year with some tasty additions, special sets & surprises mixed in.
Your 2020 Peach order will be valid for Peach 2021. Peach 2020 passholders who hold onto their festival passes for next year will be exclusively invited to an additional night of music on Wednesday, June 30, 2021.
Fans who hold onto their festival passes with camping, RV passes or glamping passes will receive special early access to the campgrounds on Wednesday, June 30, 2021.
Fans who would like a full refund have until Wednesday, June 10, 2020 to make that request. Current passholders will receive an email from Front Gate Tickets within 72 hours including details for both options.
We appreciate everyone’s patience & kindness as we worked through this process. Thank You Peach Family! Soon we will be back together sharing blue skies & sunny days. In the meantime, please take care of yourself & each other. We will see you at the Peach!