The Berks Jazz Fest occurs every year at various locations in Reading and around Berks County. The festival, which covers 10 days originated in 1990 and was sponsored by VF Outlet (also now the current festival sponsor).
For more information, the website is the best reference. However, the Berks Arts Council phone number is 610-898-1930.
Over 130 different performances are scheduled around the county. The map on Berks Jazz Fest itself is MUCH MORE explanatory of where the performances occur.