The FBI investigation of 9/119/11 Memorial Museum, 180 Greenwich St.
7 p.m.-midnight. Free
Special Agent Mary Galligan recounts the FBI investigation of the 9/11 attacks that she oversaw.
Christmas Tree LightingNew York Stock Exchange, 11 Wall St.
3-5:45 p.m. Free
Get lit with Santa during the 93rd annual Christmas tree lighting at the New York Stock Exchange.
Preview PartyNational Museum of the American Indian, 1 Bowling Green
4:30-7:30 p.m. $50, general admission; $40, members
Preview the annual Native Art Market and listen to a talk called the “Unique Art Forms in Native Design” moderated by Emil Her Many Horses.
Money Makes SenseNew York Public Library, 9 Murray St.
Volunteer to teach money management, credit ratings and other financial skills to Tribeca community members.
Women’s Self Defense WorkshopMuslim Community Network, 239 Thompson St.
2-4 p.m. Free
Engage in conversations about the female experience in New York City while learning some basic self defense.
Tree LightingJefferson Market Garden, 70 Greenwich Ave.
4:30-5:30 p.m. Free
Enjoy some cookies, holiday spirit and activities while watching the Jefferson Market Garden tree get lit.
Christmas ConcertThe First Presbyterian Church in the City of New York, 12 West 12th St.
3:30 p.m. $20
Enjoy a concert of George Frideric Handel’s “Messiah” as performers sing and play his oratorio.
Santa RescueNew York City Fire Museum, 278 Spring St.
11:30 a.m.-1:30 p.m. $8 Adults, $5 Children
Help rescue Santa during this annual museum tradition, then sit on his lap and take some photos with him.
Youth Orchestra Concert
Trinity Church, 75 Broadway
5:30 p.m.-midnight. Free
Enjoy tunes by the Trinity ISO Florenteine Orchestra partnered with the InterSchool Orchestras of New York and the Florentine Music School.
Anita M. SamuelsBMCC Library, 199 Chambers St.
3-4 p.m. Free
Hear the award-winning journalist discuss her new book and participate in a Q&A with her afterwards.
Genocide in an Age of Terror9/11 Memorial Museum, 180 Greenwich St.
Learn how security has changed with the rise of ISIS internationally and how people respond to terror networks
The Fight Against CounterfeitingMuseum of American Finance, 48 Wall St.
12:30 p.m.-midnight. Free
See how the government prevents and combats counterfeit US dollars with a talk by Chief Counsel of the Bureau of Engraving and Printing Sidney Rocke
Essential Oils 101Kula Yoga Project, 28 Warren St.
6:30-8 p.m. Free
Learn about the psychological and physiological aspects of essential oils and how to most effectively use Pure Therapeutic Grade essential oils
As the Crow FliesHercules Art, 25 Park Place
6-9 p.m. Free
Enjoy the opening reception for the drawing exhibition “As the Crow Flies” with art by Sophie Grant, Ofra Lapid and many more