9:30 a.m.: Eagleton Institute of Politics event with MSNBC Host Rachel Maddow, “A Conversation with Rachel Maddow”; Nicholas Music Center, Rutgers University.
7 p.m.: Gesher LeKesher Jewish Teen Peer Leadership Program: Parent Information Session for 2011-2012 year; The Jewish Center, 435 Nassau Street, Princeton. Free.
8 p.m.: Jonathan Wurtele, Professor of Physics at the University of California, Berkeley, will speak on “Trapping Antihydrogen: An Adventure in Modern Physics”; Princeton University, Computer Science Building.
11 a.m. to 5 p.m.: Princeton Farmers Market; Community Room of Princeton Public Library, 65 Witherspoon Street.
1:30 to 3:30 p.m.: Progression Physical Therapy of Princeton and the Jewish Family & Children’s Service presents “A Matter of Balance: Managing Concerns About Falls” class; Elm Court Dining Hall, Harriet Bryant House.
2 to 3 p.m.: Engaged Retirement April program, “Time at Last—Navigating Retirement”; RWJ Health & Wellness Center, 3100 Quakerbridge Road.
6 to 8 p.m.: Young Professionals in Healthcare—Princeton Chapter, Happy Hour; Yankee Doodle Tap Room, Nassau Inn.
6:30 p.m.: A Conversation with Governor Brendan Byrne; Rider University, 2083 Lawrenceville Road.
6:45 to 8:45 p.m.: The Greater Princeton Area Chapter of SCORE holds an “Intellectual Property Protection” seminar; Hamilton Township Free Public Library, 1 Justice Samuel A. Alito Jr. Way.
7 to 9 p.m.: Buddhism 101 with Beth Evard; Princeton Center for Yoga & Health, 50 Vreeland Drive, Suite 506, Skillman.
7:30 p.m.: Author Gregory S. Paul discusses “The Princeton Field Guide to Dinosaurs”; Princeton Public Library.
Noon: Princeton Senior Resource Center hosts a Brown Bag discussion on “Estate Planning and Wills”; Suzanne Patterson Building, 45 Stockton Street.
4:30 p.m.: D&R Greenway Land Trust invites the public to walk the Scott and Hella McVay Poetry Trail with poet, storyteller, and author, Joseph Bruchac; Greenway Meadows Park, Rosedale Road, Princeton.
7 p.m.: Princeton MothUp-Fiasco!; Labyrinth Books, Nassau Street.
8:30 to 11:30 p.m.: Central Jersey Dance Society presents Jersey Jumpers; Unitarian Universalist Congregation of Princeton, 50 Cherry Hill Road.
9 a.m.: Greening Princeton EnviRUNment 5K to benefit clean water; Forbes College on the University campus, University Place & Alexander Street. Regis-tration/Check-in starts at 8 a.m.
9 a.m. to 12:30 p.m.: Earth Day Observance and Volunteer Day; Bowman’s Hill Wildflower Preserve Visitor Center, 1635 River Road, New Hope.
9:30 a.m. to 3:30 p.m.: The Trenton Contemporary plans the 25th Annual Four Views of Trenton; The Contemporary Townhouse Museum, 176 West State Street, Trenton.
11 a.m. to 3 p.m.: Greater Princeton Area SCORE Chapter and the Princeton Public Library host a Small Business Fair; Princeton Public Library.
7 to 10 p.m.: “Aces for a Cure” tennis party to benefit the Cystic Fibrosis Foundation; Eve Kraft Tennis Center, Princeton Junction.
8 p.m.: The New Jersey Symphony Orchestra presents “A Salute To John Williams”; New Jersey Performing Arts Center, Newark. Also Sunday at 3 p.m. at the State Theatre, New Brunswick.
11 a.m. to 4 p.m.: The Delaware Valley Bead Society sponsors a Spring Jewelry Boutique; Clinton Community Center, 61 Halstead Street, Clinton.
1 to 4 p.m.: Mercer County Park Commission Nature Program, “Arrival of the Barn Swallows”; Howell Farm’s Visitor Center.
1 to 5 p.m.: Hopewell Public Library House Tour; 13 East Broad Street.
9:30 a.m.: Princeton Junior School Open House; Princeton Junior School, 90 Fackler Road, Lawrenceville.
6 p.m.: Free Estate Planning Seminar; Ventura Wealth Management Conference Facility, 200 Princeton South Corporate Center, Suite 150, Ewing.
6:45 to 8:45 p.m.: Greater Princeton Area Chapter of SCORE offers a “Financial Accounting and Financial Projections” seminar; South Brunswick Public Library, 110 Kingston Lane, Monmouth Junction.
7 p.m.: Engaged Retirement and Encore Careers program, “Job Search Strategies for Older Workers”; Princeton Public Library. Free.
9 to 10 a.m.: Chapin School Open House for Educators; Chapin School, 4101 Princeton Pike, N.J.
11 a.m.: Morven Museum and Garden hosts a lecture, “Gardens of the Arts and Crafts Movement”, featuring landscape historian Judith Tankard; Garden Room, Morven Museum and Garden, 55 Stockton Street.
4 p.m.: The Woodrow Wilson School of Public and International Affairs hosts The Honorable Arne Duncan, U.S. Secretary of Education; Richardson Auditorium, Alexander Hall, Princeton University.
4:30 p.m.: Talent Show for aspiring entertainers in elementary school; Princeton Public Library.
4:30 to 6 p.m.: The Canadian Studies Program at Princeton University hosts a colloquium with Canadian author, Nino Ricci; Robertson Hall, Princeton University.
7 p.m.: New Novelist Night; Princeton Public Library. 7 p.m.: Dr. Marty Becker, “America’s Veterinarian”, will discuss and sign his latest book, Your Dog: the Owner’s Manual: Hundreds of Secrets, Surprises, and Solutions for Raising a Happy, Healthy Dog; Princeton Barnes & Noble.
7 to 9 p.m.: CancerCare’s free educational seminar, “Communicating with your doctor (Doctor Can We Talk?)”; Mercer County Library, 333 North Post Road, Princeton Junction.
7:30 to 9:15 a.m.: Business Owner Roundtable; Bartolomei Pucciarelli, Main Conference Room, 2564 Brunswick Pike, Lawrenceville.
10 a.m.: 55PLUS meeting, “The Language of History and the History of Language”; Jewish Center of Princeton, 435 Nassau Street.
1:30 to 3:30 p.m.: Progression Physical Therapy of Princeton and the Jewish Family & Children’s Service presents “A Matter of Balance: Managing Concerns About Falls” class; Elm Court Dining Hall, Harriet Bryant House.
7 to 9 p.m.: CancerCare’s free educational seminar, “When a Loved One Has Cancer: Help for the Caregiver”; Mercer County Library, 333 North Post Road, Princeton Junction.
1 to 4 p.m.: Terhune Orchards’ Bunny Chase Easter Weekend; Terhune Orchards, 330 Cold Soil Road. Also Sunday from 1 to 4 p.m.
3 to 6 p.m.: Central Jersey Dance Society Argentine Tango Workshop; Suzanne Patterson Center.
7 p.m.: Café Improv; Solley Theatre, Paul Robeson Center for the Arts.
8:30 to 11:30 p.m.: Central Jersey Dance Society’s No Name Dance presents a California Mix; Unitarian Universalist Congregation of Princeton, 50 Cherry Hill Road.
8:30 a.m.: Tuesday Networking Breakfast with Katie DeVito’s talk, “The Importance of Networking”; Princeton Public Library.
5 p.m.: Mercer Regional Chamber of Commerce Annual Hall of Fame Dinner; Hyatt Regency Princeton.
7 to 9 p.m.: Har Sinai Temple presents a public discussion on “Contemporary Parenting in the Age of the Internet and Social Networking”; Har Sinai Temple, 2421 Pennington Road, Hopewell Township.
8 p.m.: Orpheus Chamber Orchestra with Arabella Steinbacher, violin; 91 University Place, Princeton.
10 a.m. to 4 p.m.: Arbor Day Celebration; Terhune Orchards, 330 Cold Soil Road, Princeton.
6:30 to 9:30 p.m.: Pinot to Picasso ~ Vintage 2011 fundraiser; Technology Center of Princeton.
9:15 a.m.: The Zonta Club of Trenton/Mercer is sponsoring its 11th Annual R.A.V.E. (Rape and Violence Eradication) Walk; Veterans Park, Hamilton.
10 a.m. to 2 p.m.: Princeton Barnes & Noble Job Fair; Marketfair Mall, US Route 1 South.
10 a.m. to 4 p.m.: The Annual Rutgers Day with performances, tours, exhibits, activities, lectures, and more; New Brunswick and Piscataway.
Noon to 5 p.m.: Communiversity Festival of the Arts; Downtown Princeton.
Noon to 6 p.m.: Garden State African Violet Club Show & Sale, “Violets in Tune”; Mercer County Community College Student Center, 1200 Old Trenton Road, West Windsor. Also Sunday from 9 a.m. to 4 p.m.
5 to 10 p.m.: Spring Garden Gala “Wild about Flowers”; Bowman’s Hill Wildflower Preserve Visitor Center, 1635 River Road.
7 p.m.: Dark Star Orchestra, the ultimate Grateful Dead cover band, McCarter Theatre.
Noon to 5 p.m.: 13th Annual Jubilee; Lawrenceville Main Street.
3 p.m.: Richardson Chamber Players; Richardson Auditorium, Alexander Hall, Princeton University.
3 p.m.: NJDEP Commissioner Bob Martin to Speak at Friends of Princeton Open Space Annual Meeting; Mountain Lakes House, 57 Mountain Avenue.