FRIDAY, AUG. 24

Farmers market: 3 to 7 p.m., Williams Barn at 160 Chicopee Row in Groton.

Summer Concert on the Common: Food for sale, free fun for all, 6 p.m. Rain or shine event; in case of rain, concert will be held in the Shirley Meeting House.

SATURDAY, AUG. 25

Farmers market: 9 a.m. to 1 p.m., Pepperell Town Field, Hollis Street.

TUESDAY, AUG. 28

Help for homeowners: 1 to 8 p.m., Gillette Stadium, One Patriot Place, West Club, Foxboro. U.S. Treasury Department's Making Home Affordable Program event, in partnership with HUD, gives struggling homeowners a chance to meet directly with their mortgage servicer or a housing counselor to get free help to avoid foreclosure. For information on the forms you will need to bring with you, call 888-995-4673. Forms available at MakingHomeAffordable.gov.

Genealogical Society meets: Todd Goodwin, a professional storyteller, will tell the story of his relatives that served during World War I and World War II at this meeting of the Central Massachusetts Genealogical Society at the American Legion, 22 Elm St., Gardner, beginning at 7 p.m. The public is invited to attend. For more information, contact Mary Hasselmann at 603-899-6806 or cmgs_secretary@hotmail.com.

THURSDAY, AUG. 30

Shirley Center Farmers Market: Featuring fresh local fruits and vegetables, baked goods, jams and jellies, maple products and honey, Farmstead cheeses, flowers and plants, meat and seafood, fresh eggs, "functional crafts. Live Music! 3-7 p.m. on the Common. Weekly event, July through October.

FRIDAY, AUG. 31

Farmers market: 3 to 7 p.m., Williams Barn at 160 Chicopee Row in Groton.

MONDAY, SEPT. 3

Labor Day: Town offices closed.

Groton Fire Department muster: Hollingsworth and Vose Field. Parade starts festivities at 11 a.m.

Annual Boy Scout yard sale: Troop 1 West Groton HUGE yard sale from 8 a.m. to 2 p.m. at H&V Field, Townsend Road (between routes 225 & 119), West Groton, as part of the Firemen's Muster.

COMING UP...

Marrow Registry in Still River: All are welcome to join the Marrow Registry from 1:30 to 4 p.m. Sunday, Sept. 9, at Holy Trinity Parish on 15 Still River Road, Harvard. Dana Farber Cancer Institute professionals will be on hand as well as Camp Sunshine volunteers, who will help to organize the drive. All it takes is a cheek swab to join the bone marrow registry. Participants must be between 18 and 60. For information, contact nmdpdonor@partners.org or 866-875-3324.

Like to sing?

Enjoy classical choral music? Then join us for open rehearsals Sept. 10, 17, and 24 to see if we are the group you have been looking for. The Nashoba Valley Chorale is a non-audition SATB chorus that performs under the artistic leadership of director Anne Watson Born.

This season, we will perform Mendelssohn's Elijah and Mozart's Requiem. Rehearsals are held from 7:30 to 9:30 p.m. Monday nights at the First Baptist Church, 461 King St., Littleton. Visit nashobavalleychorale.org or call 978-897-4340 for information.

Nashoba Valley Medical Center hosts free medical seminar

Are Thyroid Nodules a Serious Health Problem?

Nashoba Valley Medical Center is offering a "Meet the Expert" medical seminar on Wednesday, Sept. 12, from 6 to 7 p.m. at the hospital.

The seminar, presented by Roshney Jacob, MD, will focus on defining thyroid nodules and identifying their malignant potential. Dr. Roshney will discuss how nodules are evaluated and give a brief overview on the management of thyroid cancer. Dr. Roshney is an endocrinologist at Nashoba Valley Medical Center's Diabetes and Endocrine Center. She specializes in diabetes, metabolic disorders, and numerous endocrine issues including thyroid, pituitary and adrenal dysfunction.

"Meet the Expert" is a monthly program offered at Nashoba Valley Medical Center. All lectures are free and open to the general public. A 1.0 contact hour will be awarded to health care professionals at the completion of the presentation. Registration is required by calling 978-784-9204 or by email to rosanna.casavecchia@steward.org. Nashoba Valley Medical Center is located at 200 Groton Road in Ayer.

Children's items sale

Gently used cchildren's items including baby equipment, toys, clothes, books and more! Saturday, Sept. 22, 8 a.m. to noon. $1 admission, under 14 free. Central Congregational Church, 1 Worthen St., Chelmsford. Cash only. Sponsored by the Nashoba Valley Mothers of Multiples, a nonprofit organization. For information visit us at www.nashobavalleymom.org or call 978-376-2939.

Artist reception

The Hollis Arts Society will hold a reception for artists Judy Holder and JoAnne Gauthier, at the RE/MAX Properties Gallery, 2 Ash St., Hollis, N.H., on Thursday, Sept. 23, from 5 to 7 p.m. The event is free and open to the public with refreshments and music. Both of the artists will be there to discuss their work and answer any questions.