Preacher says?

Hi! I just read an article on Yahoo about "when the world will end".According to a preacher,it will end October 21.Now,the BIBLE says that "No man(meaning anyone in the world) will know when the world will end" It also says,and this one I can quote because I have heard it so much,"He will come like a thief in the night" He has already been humiliated once,because he predicted it would end Saturday,was it?He's an older guy,so I feel really sorry for him.I hope they don't be to hard on him.