On Saturday the Island Community Chorus presents its annual summer concert, a tradition going back 25 years. The concert will be at the Tabernacle in Oak Bluffs and carry with it a special significance, as it will be the final one for longtime musical director Peter Boak, who is retiring.

There will be an open house on Sunday at 3 p.m. at the Sailing Camp Park to celebrate Mr. Boak and his career.

For Pam Butterick, president of the Island Community Chorus, the departure of Mr. Boak is a hard one.

“He is well-loved by everyone at the Island Community Chorus,” Ms. Butterick said. “He is an elegant director, the best director most of have ever sung for.”

The performance on Saturday begins at 8 p.m. and will include pianist Garret Brown, as well as a patriotic sing-along. The concert is free and open to the public.

“We haven’t been able to sing in the Tabernacle for the past two years, so it’s a thrill for us to return for our 25th year and honor [Mr. Boak] with the concert,” Ms. Butterick said.

For more information visit islandcommunitychorus.com.