Earth Day Celebration returns to Governors Island on April 18 from 10 am to 2 pm with free educational activities and workshops for all ages, guided tours through the island’s open space, an outdoor “sound bath,” climate tech demonstrations, and more. Ferries run between the Battery Maritime Building at 10 South Street and the island from 7 am to 6 pm.

Downtown Dog Show Local dogs get to have their day in Tribeca at the fifth annual Downtown Dog Show at Bogardus Plaza on Sunday, May 3, from 3 to 4:30 pm. The canines can compete for trophies in one of many categories, from Expressive Eyes and Mixed Masterpiece to Senior Superstar and Best Trick. All entries get a raffle ticket and a chance to choose from more than $2,000 worth of prizes donated by local dog-related businesses. Go here for tickets. Sponsored by Friends of Bogardus Plaza.

“Our Flag Was Still There” is a 9/11 Museum exhibit featuring historic American flags connected to the September 11 attacks and its aftermath. Among the banners now on display is the “Ground Zero Flag” raised by FDNY firefighters on 9/11 that appears in the famous photo by Tom Franklin. “The Bin Laden Raid Flag,” also on display, was carried by a lead helicopter pilot during the mission that killed Osama bin Laden. The pilot wore the flag tucked into his flight gear. The exhibit is on view until February 2028.

KCO at Battery Maritime Building The Lower Manhattan-based Knickerbocker Chamber Orchestra returns on Friday, April 10 with a concert that “will address, through history’s words and today’s music, the treacherous condition of our Ship of State.” The program, “Singing of Democracy: In a Sea of Seething Current,”  includes the world premier of “Each and All” by KCO music director and conductor Gary S. Fagin, which draws on the words of major figures on the challenges facing democracy. The program also includes works by Aaron Copland, Leonard Bernstein, and Ricky Ian Gordon, with singers Katherine Riddle, Rosena Hill Jackson, Chauncey Packer and Ben Davis, plus a conversation with Walt Whitman scholar Karen Karbiener. The concert takes place at the Battery Maritime Building on Friday, April 10 at 7:30 pm. Go here for tickets.

April Community Board 1 meetings Albany Street end design options; District 2 Superintendent schools update; small business data; South Street Seaport Museum

With a Single Step: Stories in the Making of America is an ongoing exhibition at the Museum of Chinese in America that interweaves the historical and political context of Chinese immigration to the U.S. with the personal stories and cultural traces of multiple generations. More information here.

Indigenous glass art “Native Visions Reimagined in Glass” traces 45 years of Native glass art and showcases some 120 works by 29 artists at the Museum of the American Indian. The pieces explore glass art as a medium for Indigenous stores, designs and contemporary issues. Through May 29.

Paintings by Bruce Thorn Works that the artist calls “improvisational abstractions” go on view Wednesday, March 11 at Steven Amedee Gallery, 41 North Moore St. until April 30. Opening reception with the artist on March 11 from  6 to 8 pm. At right: “Coastal Town,” oil on canvas, 36” x 46”