In what year was The Star Spangled Banner designated as the National Anthem?

The Star-Spangled Banner was officially designated as the national anthem of the United States in 1931. This designation was formalized through a congressional resolution signed by President Herbert Hoover, making the song a symbol of American patriotism and national identity. The song itself, written by Francis Scott Key during the War of 1812, had been widely recognized as a patriotic song before this official designation, but it wasn't until 1931 that it received its formal status as the national anthem. Understanding this historical context is important as it highlights the ways in which national symbols evolve and are codified over time.