In the days of 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 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".
Matthew Fitt uses the phrase "In the days of auld lang syne" as the equivalent of "Once upon a time..." in his retelling of fairy tales in the Scots language.
Singing the song on Hogmanay or New Year's Eve very quickly became a Scots custom that soon spread to other parts of the British Isles. As Scots (not to mention English, Welsh and Irish people) emigrated around the world, they took the song with them.
Hey, you learned just a little more in 2011!!