I’m very interested in your sources as far as the “Christians”. Can you provide documentation? Because, you see I’m a “Christian” and as usual, I’ve been left out of the loop.
I am RC, and I don’t believe we can know. But here is a link to a story about the guy who thinks he does know.
http://www.npr.org/2011/05/07/136053462/is-the-end-nigh-well-know-soon-enough
I don’t think she means Christians in general, but a cult who considers themselves Christian and thinks the rapture will be on that date. At least that’s my take on it.