Sunday, Sept. 29

The 59th Annual Atlantic Coast Gem Mineral Jewelry and Fossil Show: 10 a.m.-5 p.m., Howard County Fairgrounds, 2210 Fairgrounds Road, West Friendship. 410-294-0200. gemcuttersguild.com. Hosted by Gem Cutters Guild of Baltimore. Featuring gems and minerals from around the world and activities for all ages. $0-$6.

Time Unfolding: 2:30-5 p.m., Guilford Park High School, 8500 Ridgelys Run Road, Jessup. 410-533-2795. marylandwinds.com. Maryland Winds presents world premiere of Baltimore-based composer Alexandra Gardner’s new saxophone concerto, “Time Unfolding.” Pre-concert presentation at 2:30 p.m. Free.

Monday, Sept. 30

Modern Square Dance Lessons: 7:30-9:30 p.m., Westowne Elementary School, 401 Harlem Lane, Catonsville. 410-744-7793. marylandsquaredancing.org. Modern Western square dancing lessons build progressively from week to week. Couples or singles are welcome; no partner required. $8.

Tuesday, Oct. 1

Time Unfolding: 7-9:30 p.m., Glenelg High School, 14025 Burntwoods Road, Glenelg. 410-533-2795. marylandwinds.com. Maryland Winds presents world premiere of Baltimore-based composer Alexandra Gardner’s new saxophone concerto. $10-$20.

Classes on Meditation and Modern Buddhism: 7:30-8:45 p.m., Owen Brown Interfaith Center, 7246 Cradlerock Way, Columbia. 410-243-3837. meditationmd.org. $8-$12.

Wednesday, Oct. 2

Coffee with a Cop: 9-11 a.m., North Laurel Community Center, 9411 Whiskey Bottom Road, Laurel. Have Have coffee and chat with patrol and community outreach officers. Drop in any time. Free.

Saturday, Oct. 5

Jazz Brunch Picnic in the Garden: 11:30 a.m.-1 p.m., Howard County Conservancy, 10520 Old Frederick Road, Woodstock. 410-465-8877. howardnature.org. Bring brunch picnic and listen to jazz by High Caliber in conservancy’s garden amphitheater. Orange juice and mimosas for sale. Free.

Ellicott City Volunteer Fire Department Open House: 1-4 p.m., Ellicott City Volunteer Fire Department, Station 2, 4150 Montgomery Road, Ellicott City. 410-313-2602. ellicottcityvfa.com. Rain or shine. Junior Firefighter Challenge, squirt the fire hose, tour fire engine/ambulance, dress like firefighter/EMT, learn how smoke detectors can help you, and more. Free.

Academy of St Martin in the Fields, Chamber Ensemble: 7:30-9 p.m., Smith Theatre, Horowitz Center Howard County Community College, 10901 Little Patuxent Parkway, Columbia. 410-997-2324. chambermusicmaryland.org. Contrasting string works written by Dmitri Shostakovich and Erwin Schulhoff. Also featuring Felix Mendelssohn’s Octet for Strings. Concert narration provided by WBJC’s radio host, Jonathan Palevsky. Post-show chocolate and champagne toast. $45.

Sunday, October 6

Meowtoberfest Adoption Event: Noon-4 p.m., Manor Hill Brewing, 4411 Manor Lane, Ellicott City. 410-997-7771. manorhillbrewing.com. BARCS brings its Waggin’ to the farm with adoptable animals. BARCS merchandise for sale. Farm and taproom open noon-7 p.m. Ice cream and pizza truck onsite. Live music with Justin Berdeguez, 2-5 p.m.

Recurring events

Summer Sojourn: Through Oct. 19, The Meeting House Gallery, 5885 Robert Oliver Place, Columbia. 410-997-0692. Artwork by 20 artists on display in variety of 2D media (oil, acrylic, watercolor, mixed media, cyanotype, cyanotype lenticular art, origami, graphite, pencil, photography, photo encaustic, mosaic), as well as Raku pottery. Meet the artists reception on Sept. 8, 2-4 p.m.

Paper, Rock, Scissors…Nature! with Ellen Corddry and Diane Dunn: Through Oct. 27, Artists Gallery, 8197 Main St., Ellicott City. 443-325-5936. artistsgalleryec.com. Featured show for October is “Paper, Rock, Scissors….Nature!” Ellen Corddry works primarily in woodcuts and watercolor; Diane Dunn works in various media. Reception Sept. 29, from 2-5 p.m.