No one knows.
This sounds like the prophecy of Harold Camping who says the world will end on May 21, 2011. No responsible Christian leaders are supporting this "prophecy."
Harold Camping has already been wrong once (about September 6, 1994). If he had lived in Old Testament times, he would have been stoned to death as a false prophet. http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2010/01/01/BA8V1AV589.DTL#ixzz0bUY9WWOp
"But of that day or hour, no one knows, neither the angels in heaven, nor the Son, but only the Father. Be watchful! Be alert! You do not know when the time will come." (Mark 13:32-33)
Jesus told us in no uncertain terms that we were not to know when the end of the world would come but that we were always to be ready.
Each new Christian denomination seems to worry about the end of the world a bit too much. Then after a couple of centuries, they realize that there are always wars and rumors of wars, etc.
I won't even mention the hundreds of false predictions of the end of the world over the centuries, all of which were based on individual interpretations of biblical prophecies.
The first century Christian Church thought that Jesus was going to return at any moment. Only after a couple of centuries did the Church realize that it may be 2,000 or 4,000 or 8,000 years before Jesus returns.
The Catholic Church wisely follows Jesus' advice and teaches that each of us should live as if we will meet our maker in the next ten minutes and that we need to work to make the world a better place for our 100 X great-grandchildren.
Do not worry about the end of the world. Trust God to make sure everything happens to plan. Just be ready to meet God at any time.
For more information, about what Catholics believe about the end of the world, see: http://www.americancatholic.org/Newsletters/CU/ac0993.asp
With love in Christ.