Auld Lang Syne

"Auld Lang Syne" is a Scots poem written by Robert Burns in 1788 and set to the tune of a traditional folk song. It is well known in many countries, especially in the English-speaking world, its traditional use being to bid farewell to the old year at the stroke of midnight. By extension, it is also sung at funerals, graduations and as a farewell or ending to other occasions. The international Boy Scout youth movement, in many countries, uses it as a close to jamborees and other functions.

Source: wikipedia