A national song, more commonly called a national anthem, is a musical composition officially adopted to represent a nation's identity, history, and values. It is performed at state ceremonies, sporting events, diplomatic functions, and national holidays. Anthems often feature patriotic lyrics celebrating sovereignty, unity, and heritage, set to music that ranges from martial to lyrical. While some anthems date back centuries (e.g., the UK's "God Save the King"), others were adopted upon independence. They serve as powerful symbols of collective belonging and are protected by law or tradition in most countries.