The Harmony Free Fair is set for Sept. 4-7. Among the highlights, Perkins Music House of Skowhegan and the Harmony Patriarchs Club bring the Opus One Big Band to the outdoor stage at 6:30 p.m. Saturday evening for an evening of jazz and big band music by artists such as Glen Miller, Count Basie, Quincy Jones, Horace Silver, Hoagy Carmichael, Les Hooper and Duke Ellington. The band is under the direction of Dale Perkins and is comprised of professional Maine musicians and includes music educators and performers from across Maine, who rehearse a song sometimes only once in the afternoon before performing together; all the musicians are sight-reading the music as they go.

Opus One has been playing for more than 20 years and has performed for church concert series, music booster fundraisers, and other charitable events throughout the state. There will be room for dancing on the grass, or in the big tent if rain threatens. Admission is free.

On Sunday evening, before the fireworks, Sharon Hood & Dixon Road will perform a modern-country music show. A central-Maine band, they opened for Luke Bryan in New Hampshire this summer They were the Pine Tree State Country Music Association Band of the Year and in 2014 Hood was nominated for the New England Music Awards for Female Artist of the Year. With musicians Jimmy Bell, Bruce Burpee, Ed Nevins and Craig Stutzman, they play everything from Johnny Cash to Carrie Underwood.

After the 11 a.m. Labor Day Parade down Main Street, Bill Thibodeau comes back to Harmony with his Descendants of Bluegrass.

The fair features free parking, no gate fee, and all shows free.