18 hours. The 2021 Zebra Music Festival will be held in Hefei, divided into two dates: September 17 and September 18. The performance time is slightly different every day. The performance time of the Zebra Music Festival on September 17, 2021 is 14:00 -22:00, the performance time on September 18 is 12:00-22:00, a total of 18 hours.