Duane Park Refreshments and Restoration Stop by Duane Park Sunday, Sept. 15, noon to 3pm for refreshments, music and the latest information from Friends of Duane Park representatives on their project to restore the park to its historical border. The group will show the park's proposed footprint and answer questions about the restoration and discuss the latest survey of infrastructure beneath Duane Street that impacts the project.

Constitution Day Celebrate the anniversary of the signing of the U.S. Constitution on Tuesday, Sept. 17, 5 to 7pm, with a symposium on the document and its ratification.On display will be a rare copy of the constitution—one of the 13 sent to the colonies for ratification and one of only eight that survive. At the U.S. Courthouse, 500 Pearl St. Sponsored by cultureNOW, the U.S. District Court of the District of New York, and the Lower Manhattan Historical Association. RSVP here by Sept. 10.

Fall Concert Friends of Peck Slip Park is hosting a free concert by musicians from Church Street School for Music and Art from 3 to 5pm on Sat., Sept. 14. There will be children’s activities as well. The park is located in the Seaport at Pearl, Dover, Water and Peck Slip.

Community Board 1 September Calendar Brooklyn Bridge bike lane improvements; 5G tower installations; curbside composting and containerizations; homeless shelter at 320 Pearl Street

Early Education Fair HRP Mamas helps simplify the early education search in Lower Manhattan. Now in its 10th year, the organization is again offering its free one-stop Early Education & Preschool Fair, where parents can meet the directors and staff of preschools, preschool alternatives, daycares, and enrichment programs. Sun., Sept. 15, at New York Law School, 185 West Broadway, 11am. to 3pm. Go here for more info and to register. Registration required.

Senior Group Exercise and Zumba Strengthen the whole body from warm-up to cool-down with fun exercises done to music. Rhythmic movement and aerobics, balance and coordination exercises, as well as strength training. Free. Mondays, 10:30–11:30am. Tuesdays and Fridays, Adult Zumba from 10:30–11:30am. Easy-to-follow Latin dances. Work on your balance, coordination, and range of motion. Both at the Irish Hunger Memorial Plaza.

Adam Nimoy on Father Leonard Adam Nimoy talks about his father Leonard Nimoy of “Star Trek” fame at the Museum of Jewish Heritage on Sept. 10 at 7 pm. Nimoy’s memoir, “The Most Human: Reconciling with My Father,” explores his difficult relationship with Leonard and the parallel paths of their troubled lives. A $10 donation is suggested. Go here for more information.

BPC Block Party is back after an eight-year hiatus. There will be kids games, live music, games and contests, and numerous local vendors and restaurants. The event, sponsored by the BPC Authority, is Sat., Sept. 21, from 11 to 4 on Esplanade Plaza next to North Cove Marina. Information at facebook.com/BPCBlockParty