The mayans believed that the planets will aline some time in december this year (which is true)
They also believed that A spiritual/dimensional planet will also align with us making it possible to see. They believed it brought us in line with the world of the Gods.
It is said that is where the Mayans disappeared too...
PS I think its December 21 or 22, cant remember. But the Mayans where dead on when the predicted it would happen thousands of years ago.
I believe the Mayans believed in that shit and we dont so it wont do much.
Possibly it will throw off out rotation around the sun and mess up the seasons (doubtful).
BUT i believe Dr.Matt will just nerd out and tell you the rest of the story which I was to careless to remember when I learned about this shit. haha