NY Harbor Regatta and Regatta Bash: Governors Island hosts the NY Harbor Regatta Bash 5 to 10 p.m. Friday, Sept. 16. The beach becomes home to an open bar, live reggae music, an oyster bar and seafood dishes from restaurants including Blue Fin, Triumphe and Crave Fish Bar. Tickets are $125 and include food, drinks and dancing. Ferry service starts at 4:45 from the Battery Maritime Building at 10 South Street. At 2 p.m., the Spectator Cocktail Cruise offers a networking event while watching the NY Harbor Regatta above a yacht. The cruise returns to the docks at 4:30, just in time for the first ferry to Governors Island. Visit www.oysterweek.com/events/2016 to see all events and purchase tickets.

Brooklyn Book Festival: The Brooklyn Book festival takes place 10 a.m. to 6 p.m. Sept. 18. It’s Manhattan’s largest free literary event, featuring rising stars in the book world, as well as famous authors. Attending authors include Margaret Atwood, Cecily von Ziegesar and Joyce Carol Oates. The festival includes lectures, discussions and panels from a variety of literary genres and authors. Visit www.brooklynbookfestival.org to see the full schedule of events.

Blues, Brews and Botany: On Sept. 17-18, the New York Botanical Garden offers an exploration of beer and botany. From noon to 5 p.m. taste craft beers, enjoy talks by brewers and scientists, while live blues and bluegrass plays. Tickets are $30 which includes a Tasting Tumbler and All-Garden Pass. STARR Events will provide food and participating breweries include Strongbow Cider and Blue Moon Brewing Company. Lectures include the Botany of Beer and Plant Collecting Demonstrations. Visit www.nybg.org for more information.

The Medieval Festival: The annual festival returns to Fort Tryon Park from 11:30 a.m. to 6 p.m. Sunday, Sept. 18. The free day brings the Middle Ages to the heart of Manhattan. The uptown park turns into a medieval market town including performers and vendors. Authentic music and dance will accompany jesters and jugglers. Purchase medieval food, drinks and crafts. The day ends with a joust between four knights. Visit www.whidc.org/festival/home.html for more information.

Discovery Day at Freshkills Park: Staten Island’s Freshkills Park offers 700 acres and eight miles of trails on a former landfill site. Bring bikes (or borrow one) to ride on the three mile loop along wetland ponds and meadows. Educational walking tours and activities will be led by NYC Audubon, the Staten Island Greenbelt and NYC Sanitation. Freshkills Park is three times the size of Central Park and was once the largest landfill in the world until it closed in 2001 and was remade into a park. Free shuttle buses will run from the Staten Island Ferry Terminal from 10:30 a.m. to 2 p.m. Visit freshkillspark.org to learn more.