10 a.m. to 3 p.m.: Mercer Regional Chamber of Commerce Spring Business Expo; Cedar Gardens, Route 33 Hamilton.
12:30 p.m.: Kosher Café East; Beth El Synagogue, 50 Maple Stream Road, East Windsor.
8 to 10 a.m.: Breakfast Seminar on The Risk of Ignoring Millennials; Main Street Euro-American Bistro, Princeton Shopping Center.
9 a.m. to 3 p.m.: American Red Cross open blood drive; Princeton University Frist Center, 1 Washington Road.
4:30 p.m.: Princeton Middle East Society presents “North Africa’s Intifadas,” a lecture by John P. Entelis, Director of the Middle East Studies Program at Fordham University; McCormick 101, Princeton University Art Museum.
10 a.m. to Noon: Fundraising for Japan’s Earthquake & Tsunami, A Benefit Lesson to Support Japan, “Learn to make a Fresh Flower Cake”; Kingston Presbyterian Church, 4561 Highway 27. Also from 7 to 9 p.m.
6 to 10 p.m.: Storytelling Arts, Inc. sponsors A Taste of the Arts, food and wine tasting to support arts programs for children in Trenton; Mountain Lakes House, 57 Mountain Avenue, Princeton.
7:30 p.m.: Ellarslie Rocks with Ernie White and Tom Reock; Ellarslie Mansion, Cadwalader Park, Trenton.
7:30 to 9 p.m.: Successfully Speak Up Toastmasters meeting; Kingston United Methodist Church, 9 Church Street, Kingston.
8 a.m. to 2 p.m.: 2nd Annual Ben Franklin Spring Sale; 2939 Princeton Pike.
9 a.m. to 1 p.m.: West Windsor Community Farmers Market; Vaughn Drive Parking lot of the southbound side of the Princeton Junction Train Station.
9 a.m. to 1 p.m.: Spring Flea Market to benefit Princeton First Aid & Rescue Squad; 237 N. Harrison Street.
10 a.m. to Noon: Knight Classic Homes presents “Building your Custom Modular Home” Seminar and Open House; The Updike Farmstead, 354 Quaker Road, Princeton. Free.
10 a.m. to 2 p.m.: Bicycle Rodeo, Road Course, free raffles, and refreshments; John Witherspoon Middle School Teacher’s Parking Lot, Guyot Avenue.
10 a.m. to 4 p.m.: Designer Clothing Sale to Benefit Meals on Wheels of Trenton/Ewing; 308 Columbia Avenue, Ewing. Also Sunday from 10 a.m. to 4 p.m.
11 a.m. to 4 p.m.: PrincetonKIDS Family Fun Day at Quaker Bridge Mall; Lawrenceville.
11 a.m. to 4 p.m.: Lawrenceville Main Street hosts Sixth Biennial House Tour, “Country Living”; 17 Phillips Avenue, Lawrenceville.
8 a.m. to Noon: Princeton Airport celebrates 100 years of aviation with a Fly-In/Drive-In Pancake Breakfast; Princeton Airport, Route 206.
11 a.m.: Har Sinai Temple hosts a barbecue; 2421 Pennington Road, Hopewell Township.
Noon to 4 p.m.: Diversity Day; Lawrence High School.
2 to 3:30 p.m.: D&R Greenway art exhibition, “Transforming Natural Materials Into Art for All Ages”; D&R Greenway, One Preservation Place, Princeton.
2 to 4 p.m.: Free Chakra Yoga & Aromatherapy class; Princeton Center for Yoga & Health; 50 Vreeland Drive, Skillman.
3 p.m.: Princeton University Program in Hellenic Studies and Program in Jazz Studies host a concert “Chromatisms,” with Nicholas Bouloukos and the GrecoNubian Quintet; Taplin Auditorium, Fine Hall.
3 p.m.: The Met Orchestra; Stern Auditorium, Carnegie Hall, 881 Seventh Avenue, New York City.
6 p.m.: The Adult Friendship Circle Cooking Circle; 103B Kingston Terrace Drive, Princeton.
7:30 p.m.: The Arts Council of Princeton presents “Visions of Light, Art Through Film”; Paul Robeson Center. Free.
5:30 p.m.: Princeton Public Library Board of Trustees Meeting; Princeton Public Library, 2nd floor conference room.
5:45 p.m.: Registration opens for the Princeton Athletic Club’s Spring Cross Country Series; Rosedale Park, Federal City Road. Youth mile cross-country run begins at 6:30 p.m.; Open 5K cross-country run begins at 7 p.m.
7 p.m.: Real Housewife of NJ, Teresa Giudice signs her cookbook, Fabulicious!: Teresa’s Family Cookbook; Princeton Barnes & Noble, Marketfair Mall.
Noon to 2 p.m.: Thomas Edison State College offers Tours of Prudence Townsend Kelsey Memorial Room; 101 West State Street, Trenton.
7 p.m.: Join bicyclists worldwide in “The Ride of Silence”, a silent, slow-paced ride for one hour to honor bicyclists who have been injured or killed on our roads; leaves from the West Windsor Municipal Complex.
7:30 to 9:15 a.m.: Business Owner Roundtable breakfast; Bartolomei Pucciarelli, 2564 Brunswick Pike, Lawrenceville.
11 a.m. to 4 p.m.: Princeton Farmers’ Market; Hinds Plaza. Every Thursday from 11 a.m. to 4 p.m.
8 p.m.: Tokyo String Quartet; Richardson Auditorium, Alexander Hall, Princeton University.
9 a.m. to 5 p.m.: The African Violet Society of America invites the public to visit the 65th Annual Convention Show and commercial salesroom; Crowne Plaza Hotel, 2349 W. Marlton Pike, Cherry Hill, N.J. Also Saturday from 9 a.m. to 4 p.m.
11 a.m.: Hasty Acres live demonstration of Equine Natural Movement by Bobbi Jackson; Hasty Acres, Kingston.
5:45 p.m.: New Jersey Governor Chris Christie will deliver a policy address at Princeton University; McCosh Hall, room 50. Free and open to the public.
8:30 to 11:30 p.m.: Central Jersey Dance Society open dancing with music by DJ Paola Pasta Lanna; Universalist Unitarian Congregation, Cherry Hill Road.
8 a.m. to 1:30 p.m.: American Red Cross open blood drive; Hightstown Emergency Medical Services, 168 Bank Street meeting room.
8:30 a.m.: The fourth, state-wide 5K NAMIWalk to combat stigma and improve the lives of families affected by mental illness; Rider University, 2083 Lawrenceville Road. Walk begins at 10 a.m.
9 a.m. to Noon: Community Connection of Princeton HealthCare Rummage Sale; 905 Herrontown Road.
10 a.m.: Morven Museum & Garden holds a special event, “Walk the Canal Path; meet at the historic Kingston Canal House, Route 27.
10 a.m. to 2 p.m.: Healthy Children, Healthy Planet Community Event; Riverside School, 58 Riverside Drive.
11 a.m. to 4 p.m.: Merwick Rehab & Care Center presents “Healthy Eating the Mediterranean Way”; 100 Plainsboro Road.
3:30 to 5 p.m.: Family Nature Programs, “Awesome Insects”; New Jersey Audubon’s Plainsboro Preserve.
8 to 9:30 p.m.: Drumming Circle with Sharon Silverstein; Princeton Center for Yoga & Health, 50 Vreeland Drive, Suite 506, Skillman.
3 p.m.: The Blawenburg Band commemorates its 121st Anniversary year with a free concert; Hopewell Valley Central High School Performing Arts Center, Pennington.
7 p.m.: Socrates Café; Princeton Public Library community room.
7:30 p.m.: St. Paul’s Catholic Church hosts an art retreat, “Blessed Art Thou: A Celebration of Mary in Art and Story”; 214 Nassau Street.
11 a.m. to 4 p.m.: Princeton Farmers’ Market; Hinds Plaza.
9:30 p.m.: New Hope & Lambertville Chambers of Commerce present the kickoff of Friday Night Fireworks; Over the Delaware River, New Hope & Lambertville. Through September 2.
10 a.m.: The Spirit of Princeton invites the community to the annual Memorial Day Parade and Dedication Ceremony; Nassau Street.
8:30 to 11:30 p.m.: Central Jersey Dance Society’s No Name Dance presents California Mix Dance with Night Club Two Step and West Coast Swing lessons; Unitarian Universalist Congregation, 50 Cherry Hill Road, Princeton.
Memorial Day
8:30 to 11:30 a.m.: Memorial Day Yoga Explosion; Princeton Center for Yoga & Health, 50 Vreeland Drive, Skillman.