Which song is traditionally sung at midnight during many New Year's Eve celebrations?

Auld Lang Syne is the song traditionally sung at midnight during many New Year's Eve celebrations.

The title uses Scots words meaning “old long since,” or more naturally, “for old times' sake.” The song reflects on friendship, shared memories, and the passage of time, which helped make it a fitting choice for a year-end gathering.

Scottish poet Robert Burns sent a version of the lyrics to a Scottish music collector in 1788, saying that the song had been taken down from an old man's singing. The tune later became widely associated with New Year's celebrations in English-speaking countries. It is not a universal midnight song worldwide, and performances often include only selected verses.