2nd Amendment Day is observed in various U.S. states, notably on December 15 in South Carolina and June 28 in Oklahoma. This day commemorates the right to keep and bear arms as protected by the Second Amendment to the United States Constitution. The Second Amendment, ratified alongside the Bill of Rights, states, “A well regulated Militia, being necessary to the security of a free State, the right of people to keep and bear Arms, shall not be infringed.” In South Carolina, the day is part of a campaign aimed at educating school students about gun rights, while in Oklahoma, it marks the anniversary of the Supreme Court ruling in McDonald v. City of Chicago, which affirmed that state and local governments cannot infringe upon this right. Additionally, Pennsylvania has held Second Amendment Action Day since 2006, a rally supporting gun rights at the state capitol. Overall, these observances reflect the unique gun culture in the United States, characterized by high rates of gun ownership and polarized gun politics.