Auld lang syne

Almost no one understands this song, but it's traditionally sung at midnight on New Year's Eve.

"[T]he song begins with a rhetorical question: Is it right that old times be forgotten, should we not remember the old times?

"The answer is generally interpreted as a call to remember long-standing friendships, to remember deeds done, both for you and by you, and save those memories for the future."