Museum Day is an annual celebration of boundless curiosity hosted by Smithsonian Magazine. Participating museums across the country provide Free Admission to anyone presenting a Museum Day ticket. Bring along your ticket and your curiosity! This is a one-day event in which participating museums and cultural institutions across the country provide free entry to anyone presenting a Museum Day ticket. Participants are allowed to download one ticket per email address. The ticket provides free general admission on Saturday, September 18, 2021, for two people.