Christmas Concert. The Friendship Singers will be performing a Christmas concert here at the New Scotland Presbyterian Church 2010 New Scotland Rd, Slingerlands, 12159, at 7 p.m. If you can't make this concert, they are also be performing on Dec 22 at 7 p.m. at The Delmar Reformed Church at 386 

Medusa firehouse Children's Christmas Party. Santa, games, crafts, and treats! from 1 to 3 p.m. at Medusa firehouse 28 County Rte 351, Medusa, 12120.+

Mingle and Jingle Holiday Party. BYOB and an unwrapped gift for a drawing. Raffles, Drawings, Santa, entertainment, refreshment, and much much more. 6 p.m. at The American 192 Sharon Spring 13459

Holiday Lights in The Park. Celebrate the Season in The Town of Bethlehem. from 6 to 9 p.m. at Drive-thru Event Elm Avenue Park 261 Elm Ave., Delmar.

Nature Hike. Glacial Geology Walk Sunday, November 27th, 10:00 am-11:30 am Learn how glaciers shaped the Capital Region landscape on this two-mile walk over the Escarpment Trail. Recommended for ages 12+. Registration is not required. 10 a.m. at Thacher State Park Visitor Center 830 Thacher Pk Rd, Voorheesville, 12186 

Santa Comes to Elliott House Thrift Shop. Bring your children to visit with Santa while you shop for the many items that are still available. Shop hours are Wed, and Friday from 10 a.m. to 4 p.m., Thursday from 10 a.m. to 7 p.m., and 10 a.m. to 1 p.m. on  Saturdays. 10:30 a.m. to 12:30 p.m. at Elliott House Thrift shop Route 81, Norton Hill,

Amphibian Lecture. Amphibians are important indicators of the health of the environment, and in the northeast, we are home to dozens of species! Come learn about how they are an important part of our ecosystem.  7 p.m. at Thacher State Park Visitor Center 830 Thacher Pk Rd, Voorheesville, 12186 

NY Plant Seed Swap. Whether you're new to gardening or a long-time native plant grower, this drop-in event is for you! Learn from experienced gardeners, swap native seeds, and learn how to winter-sow them. Make native-seed crafts, and enjoy some baked goods. 11 a.m. at Thacher State Park Visitor Center 830 Thacher Pk Rd, Voorheesville, 12186 

Around the World with Risse. Celebrate 15 Years of Service to Refugee and Immigrant Families! 2 to 5 p.m. at  WAMC Hall 339 Central Avenue, Albany.

Trunk Or Treat.  Come dressed in costume and enjoy treats, games, crafts, prizes, and Halloween fun! from 1 to 3 p.m. at Voorheesville Middle and High Schools 432 New Salem Rd Voorheesville, 12186