Share: T’was a long time ago, longer now than it seems, in a place that you’ve probably seen on your screens. This year, Tim Burton’s iconic and dreary “The Nightmare Before Christmas” turns 30 years old. But if even after all this time you still haven’t seen it, I’d say it’s time you get to it. “The Nightmare Before Christmas” originated as a poem written by Burton in 1982 while he worked as an animator for Disney. While it was far away from the fleshed-out …