What is the traditional New Year's Eve song commonly sung in English-speaking countries?

Auld Lang Syne is the traditional New Year's Eve song commonly sung in English-speaking countries.

The song uses a Scots phrase meaning “old long since,” or more naturally, “for old times' sake.” Its lyrics are based largely on a poem by Scottish writer Robert Burns, who sent a version to a friend in 1788. Burns may have drawn on older Scottish verses and folk material rather than creating every line from scratch.

The tune used today became widely associated with the song during the nineteenth and twentieth centuries. Guy Lombardo and his Royal Canadians helped establish its strong New Year's Eve connection in North America through radio broadcasts beginning in the 1920s.

Auld Lang Syne is not exclusively a New Year's song. It is also used at farewells, reunions, graduations, memorials, and other moments of transition. Different countries and communities sing different verses or translations.