According to the Bible when is the end of the world?

Okay listen up! People...we will NEVER--i repeat--NEVER EVER EVER! know when the world will end. The Bible does not really say. It is just when everything is going wrong and when we are not ready. So be ready! That is the real answer. An exact date? IMPOSSIBLE! I does NOT say anywhere in the Bible "Just to let you people in the future know the world will end on December 21, 012" NO! NEVER EVER EVER EVER EVER EVER EVER EVER...believe anyone that the world will end at a certain time. Not even the top scientists in the world! How would they know? Don't listen to that junk.