100 percent Renewable Energy Plan for NYS discussion, 7 p.m., County Courthouse, 197 Main St. Sponsored by Sustainable Otsego.
Talking Opera: ‘Madame Butterfly,’ 7 p.m., Christ Church Parish Hall, 69 Fair St.
City of the Hills Sweet Adeline Chorus Rehearsal, 7 to 9:30 p.m., First United Presbyterian Church, 381 Main St., Roosevelt Avenue entrance. New singers welcome. For info: 267-4718.
Oneonta Lodge No. 466 Free and Accepted Masons, 7:30 p.m., Masonic Temple, 322 Main St.
History of Sunset Hill, 7 p.m., Richfield Springs Historic Association, 134 W. Main St. For info: (315) 858-0027.
Worcester Woman’s Club, 7 p.m., Club rooms, 168 Main St.
Book Club for Moms, 9:30 to 11:30 a.m., Christ Church library, 69 Fair St. For info: 547-9555 or (315) 415-8400.
Delhi Rotary, 6:15 p.m., Crossroads Cafe, 80 Main St.
Knitting, 6:15 p.m., Cannon Free Library, 40 Elm St. For info: 746-2662.
Four County Library System Cybermobile, 10 to 10:25 a.m., Grand Gorge civic Center, Route 30. For info: 723-8236.
Butternut Valley Quilt Guild meeting, 10 a.m., Laurens Presbyterian Church, Main Street. Flo Loomis will instruct the One Block Wonder quilt method. For info: 433-0524 or 293-7356.
Andy Mason presents a program on returning spring birds, 6:30 p.m., Fairview Public Library, 43 Walnut St.
ADK hike, 10 a.m., Otsego Land Trust, 496 Sibley Gulf Road. RSVP to Sara at 547-2366. For info: www.otsegolandtrust.org.
Catskill Area Hospice Thrift Shop, 10 a.m. to 4 p.m., 261 Main St. For info: 432-5335.
Community Conversations, 8 to 9 a.m., Collage in the Shops at Ford and Main, 261 Main St. Join city officials for informal discussion.
Del-Otse-Nango Kennel Club, 6:30 p.m., Pizzaland, 24 Oneida St. For info: 621-3582.
The Lord’s Table, 4:30 to 6 p.m., 18 Elm St., Next to St. James’ Episcopal Church. A feeding program serving a full dinner. For info: 432-3558.
Martha Chapter No. 116, Order of the Eastern Star, 7:30 p.m., Masonic Temple, 322 Main St.