Get your tickets printed now — In Chicago, why not make plans now to enjoy free admission at many museums in Chicago on Museum Day, Saturday, September 22, 2018, Adler Planetarium, Notebaert Nature Museum, DuSable Museum of African American History, and Museum of Contemporary Art are among the Chicago museums offering people free tickets Saturday Sept. 22 as part of Smithsonian magazine’s national Museum Day promotion. Check out these other museums offering tickets to people who visit the Smithsonian website and download a pass include the Peggy Notebaert Science Museum, American Writers Museum, National Hellenic Museum and Intuit museum of outsider art.