A national anthem is a song that is used in an official capacity to represent and inspire patriotism in a country. It plays a similar role to a country’s motto or flag. Occasionally an organization of several countries will also have an anthem. Various genres of music are chosen to be a national anthem. The music may be a fanfare a hymn, a march, or a song of some other type.

A country’s national anthem is used at important gatherings. The national anthem of the country of the winning athlete in each Olympic trial. The national anthem is also used in local sporting events, such as baseball games and the Super Bowl.

The national anthem of the United States is “The Star Spangled Banner,” with music by John Stafford Smith and words by Francis Scott Key. Officially adopted in 1931, the words were written on 14 September 1814 as Key, detained by the British, was inspired by the sight of the American flag over Fort McHenry the morning after a brutal British attack. He wrote:

O say, can you see, by the dawn's early light,
What so proudly we hail'd at the twilight's last gleaming?
Whose broad stripes and bright stars, thro' the perilous fight,
O'er the ramparts we watch'd, were so gallantly streaming?
And the rockets' red glare, the bombs bursting in air,
Gave proof thro' the night that our flag was still there.
O say, does that star-spangled banner yet wave
O'er the land of the free and the home of the brave?

Key wrote the words to fit Smith’s tune, which was called “To Anacreon in Heaven.” Prior to 1931, both “The Star-Spangled Banner” and “My Country ‘tis of Thee” were both used as national anthems.

Some national anthems have never been officially sanctioned. The hymn-like national anthem of the British Isles, “God Save the Queen” (or King), has never received official sanction, but it has been used since the middle of the eighteenth century. The United Nations has a national anthem with words by W. H. Auden and music by Pablo Casals, that is also unofficial.