Auld Lang Syne (with lyrics)

"Auld Lang Syne" is a Scotish poem written by Robert Burns in 1788. It is well known in many countries, especially (but far from exclusively) in the English-speaking world; its traditional use being to celebrate the start of the New 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 song's Scots title may be translated into English literally as "old long since", or more idiomatically, "long long ago","days gone by" or "old times". Consequently "For auld lang syne", as it appears in the first line of the chorus, is loosely translated as "for (the sake of) old times".
Taken from Wikipedia