Jazzfest is an annual event that occurs in New Orleans in the Spring since the 1970's with it being held at the Fair Grounds, actually the Horse Race Track, in New Orleans for the last 30 plus years. There are currently over a dozen stages with live music and other performers and it runs from 11 am till 7 pm daily over two weekends and the corresponding Fridays.
(I will be adding earlier years after I get the photos scanned).