Upvote:3
No, if that prediction proves wrong the Bible will not be called a false book because it doesn't make that prediction. On the contrary it clearly states in plain language in several places that we are not and will not be in a position to know a date for the end of the world ahead of time.
On the other hand whatever people are running around making this prediction will be considered false prophets by most of Christianity. Almost all major branches or Christianity hold to (at least on paper) the Biblical teaching that people who make false predictions prove themselves to be false prophets.