You know exactly when you'll hear it, and you probably won't hear it again for a year. The big clock will hit 11:59:50, the countdown will begin—10, 9, 8, 7, 6, 5, 4—and the sounds will rise: the party horns, fireworks and shouts of "Happy New Year!"

And then they'll play that song: "Should auld acquaintance be forgot and never brought to mind? Should auld acquaintance be forgot, and days of auld lang syne?"

It...