The Mayans have never been wrong with their calendar prediction skills.
Religious texts however... Well, half the time we can't even agree on which ones to use, let alone correct interpretation. I'm gonna place my money on the people who discovered the center of the universe before we knew what gravity was.
(fyi. Mayan calendar does not say it is the end of the world, it says the end of an era. Most likely it's going to be when the alien overlords that took them to space come back for the rest of us to make fun of us or harvest us for the spice mines)
Is that enough cloudcookulander yet?