Middle Country Public Library, 101 Eastwood Blvd., Centereach presents its 26th annual Women’s EXPO on Oct. 1 from 11 a.m. to 6 p.m. A showcase and a marketplace for Long Island women entrepreneurs, this indoor event will feature over 80 exhibitors offering jewelry, accessories, gifts, baked goods, home decor and much more. Free admission. 631-585-9393, www.womensexpoli.org

St. Patrick Church & School, 280 East Main St., Smithtown will hold their 2nd annual Family Festival tonight from 6 p.m. to 10:30 p.m., Oct. 3 from 1:30 p.m. to 10:30 p.m., and Oct. 4 from 1:30 p.m. to 8 p.m. featuring carnival rides, games, entertainment, a Beer & Wine Garden, food trucks and vendors and more. Admission is free with P.O.P. bracelets for rides. www.newtonshows.com

Cold Spring Harbor Laboratory, One Bungtown Road, Cold Spring Harbor continues its concert series with clarinetist Bixby Kennedy and pianist Steven Beckin the Grace Auditorium at 7 p.m. Each composition of the night will showcase the captivating power of the clarinet and piano, as well as the incredible talent of Kennedy and Beck. A reception will follow. Tickets are $15 at www.cshl.edu.

Three Village Historical Society and Tri-Spy Tours, in collaboration with local historical and cultural organizations, present the 12th annual Culper Spy Day from 10 a.m. to 4 p.m. Begin at the TVHS, 93 North Country Road, Setauket. Visit 10 historic sites via trolley and learn about the Culper Spy Ring from costumed docents along with colonial cooking and invisible ink demonstrations, historic house tours, a walking tour and much more. Most activities free. 631-751-3730, www.tvhs.org/culper-spy-day

Rescheduled from Sept. 26. Cold Spring Harbor Fish Hatchery, 1660 Route 25A, Cold Spring Harbor presents its annual Fall Festival Fundraiser from 10 a.m. to 4 p.m. with environmental exhibitors, kid’s fishing, music, games, live animal encounters, food and more. Admission is $7 adults, $6 seniors, $5 children. Rain date is Oct. 3. 516-692-6768

Time to shop! A Smithtown Fall Craft Fair will be held on the grounds of the Smithtown Historical Society, 211 E. Main St., Smithtown today and Oct. 4 from 10 a.m. to 5 p.m. Featuring craft and small business vendors, live music, food trucks and more. Free admission. 631-885-1267