11am-5pm, $12, 12 Fulton St, 212-748-8600, southstreetseaportmuseum.org. The Seaport Museum’s 50th anniversary will be marked throughout the year with the opening of new exhibitions, including “Millions: Migrants and Millionaires aboard the Great Liners,” 1900-1914 (opening June 2017), artistic and musical performances, lectures and book talks, walking tours, and a formal 50th anniversary cocktail reception aboard the 1885 ship Wavertree in Sep.