The traditional New Year's Eve song sung at midnight in many English-speaking countries is Auld Lang Syne.
The lyrics are based on a Scots poem by Robert Burns, who wrote them down in 1788. The title is a Scots phrase commonly interpreted as “old long since,” referring to memories and friendships from the past.
The familiar melody became widely associated with farewell gatherings and the New Year. In many places, people sing it immediately after midnight, often while linking arms or raising glasses. The exact verses and pronunciation vary by country.
Auld Lang Syne is not exclusively a New Year's song. It is also used at graduations, funerals, retirements, and other occasions marking a transition or farewell. Its symbolic connection with remembrance explains its wide use beyond the calendar holiday.