Old Time Barn Dance, 7 p.m., featuring caller Paul Rosenberg and live fiddle band Tamarack, playing traditional music to benefit the Northeastern Cave Conservancy, at the Octagon Barn at 588 Middle Road in Knox (use Delanson 12053 for GPS directions).  No experience necessary, all dances are taught.  $10 per person ($5 per student), $20 per family, children under 12 free. Refreshments & light snacks will be served. (518)618-5376.

Rummage Sale at Altamont Reformed Church. 10 a.m. to 4 p.m. at the church on 129 Lincoln Ave.  Games, sports equipment, toys, jewelry, antiques, household goods and new crafts among many treasures.  Fantastic bake sale available to treat your palette! Rain or shine!

In celebration of Knox Caves long history of visitation and successful management, a special exhibit of advertising and memorabilia, photographs and other objects from the history of the cave.  In conjunction with annual barn dance to be held on 7 to 10 p.m., at the Octagon Barn at 588 Middle Road, Knox NY.

Dudley Observatory Star Party & Program: Dr. Valerie Rapson “We Love Pluto!  Latest Discoveries From New Horizons” 8 p.m. rain or shine in the Octagon Barn; outdoor observing to follow, weather permitting. 588 Middle Road in Knox (Delanson 12053 for GPS). All are welcome.  Telescopes provided, or bring your own.  Free refreshments.  618-5376.

Corey Harris: New Orleans, Caribbean and African influenced acoustic guitar blues. 7:30 pm at the Old Songs Community Arts Center, 37 South Main Street, Voorheesville, NY. Tickets are $23 Online, $25 at the door (or by phone), and $5 for children 12 and under. oldsongs.org (518) 765-2815.

Voorheesville Farmer’s Market 3:30 to 6:30 p.m. at the First United Methodist Church 68 Maple Ave. in Voorheesville will feature Iceton, woodworking and photography.  Some proceeds will go to Guilderhaven. Next week, Oct. 4, is the last market. Come stock up on your veggies, honey and other goodies.

Hanzhi Wang, world renowned classical accordionist will be performing at the Octagon Barn at 2 p.m.  588 Middle Road in Knox (Delanson 12053 for GPS). All are welcome.  Donation jar, but no admission fee.  Free refreshments.  (518) 618-5376.

Save the Pine Bush is sponsoring a bird walk at 8 a.m. See the Fall leaves and birds that have taken residence. The leader will be expert Neal Reilly. Meet at the Discovery Center. (518)465-8930.

Dormansville United Methodist Church: Rummage Sale. 9 a.m. to 4 p.m. Church hall is filled with a little of everything! Light refreshments.

Dormansville United Methodist Church Thrift Shop, open Tuesdays and Fridays, August through September from 10 a.m. to 2 p.m.; plus the first Saturday of the month. Located on Route 312 in Dormansville.