Switzkill Farm in Berne Earth Day Celebration from 11 a.m. to 3 p.m. Kids activities/crafts, wildlife rehabilitator, food, music, vendors, honeybee demonstration, geocaching, radio-controlled car demonstration, guided nature and geology walk at 1 PM. Kids can take home a tree for planting. Event is free and open to the public.

Nest Box Monitoring Workshop at Thacher Nature Center. 11 a.m. to 1 p.m. This training will teach you to identify the birds using the birdhouse or nest in your yard and how to monitor the progress of the nestlings. Learn how to obtain and record data and how to keep your baby birds safe from harm. Call 872-0800 to register for this free program.

The Capital Region Jewish Genealogical Society (CRJGS) will present an “Introduction to Using DNA in Genealogy”. The meeting will take place Sunday, April 22, from 10 am to noon at Congregation Gates of Heaven in Schenectady, NY.

2018 Capital District African Violet Society Annual Show and Sale. "A Violet Rainbow". April 22, 1 to 4 p.m. and April 23 12 to 4 p.m. St. Matthew's Catholic Church 25 Mountainview Street Voorheesville, NY 12186.

Martin Carthy One of the most influential figures in English folk music. 7:30 p.m. at the Old Songs Community Arts Center, 37 S. Main St., Voorheesville, NY. Tickets are $23 Online, $25 at the door (or by phone), and $5 for children 12 and under are available at oldsongs.org or by calling Old Songs at (518) 765-2815.

Bag sale. Karie Jean's Closet, First United Methodist Church, 68 Maple Ave Voorheesville will be having a $1 a bag sale. All clothing, shoes, purses $1 a bag.  Proceeds are used for mission projects. Bag sale will be noon to 3 p.m.; and Wed, April 25, 3:30 to 6:30 p.m.

Albany Pine Bush Preserve Commission will host its annual Earth Day celebration at the Discovery Center from 9 a.m.to 12 p.m.

Celebrate Earth Day. 10 a.m. The Friends of the Woodlawn Preserve, Capital/Mohawk PRISM and NYFOA CDC are hosting a Woodswalk in Schenectady’s Pine Barrens Preserve. Meet at information kiosk at the end of Gifford Rd. (600 block), 1 mile south of State St. near the Schenectady/Niskayuna line.

“Thacher State Park: A Classic North American Geologic Site” at Thacher Visitor Center. 2 p.m. Explore these various Helderberg histories with Dr. Chuck Ver Straeten, geologist at the NY State Museum. Call 518-872-0800 for more information.

Early Spring Wildflowers at Thacher Park. 10 a.m. Woodland wildflowers known as spring ephemerals bloom on the forest floor before the trees leaf out and block the sun. Meet at the Paint Mine picnic area. Call 518-872-0800 to register.