The United States Air Force Liberty Jazz Band is holding a free concert beginning at 5 p.m. on Friday, Sept. 14, at the Ocean Park bandstand. The musicians are part of the United States Air Force Band of Liberty from Hanscom Air Force Base outside Boston.

The band has been performing for 25 years, paying homage to the big band sounds of Count Basie, Duke Ellington and Benny Goodman, along with modern composers such as Maria Schneider, Mike Crotty and Sandy Megas.

In the case of bad weather, the concert will take place at Dreamland, 9 Oak Bluffs avenue.