It is official - Xmas is NP hard. See exactly how and appreciate the value of holiday algorithms.
If you like xkcd then you will like Abstruse Goose.
Not all of the cartoons you find there are about programming or computer science, but you should smile at quite a few that are about science, technology and, well just life the universe and ....
For example, if you are a computer scientist then there is no doubt that Xmas really is hard, NP Hard that is:
More cartoons worth seeing at Abstruse Goose.
Visit it now.
You won't regret it.