Sabrina Sforza Galitzia has studied Da Vinci manuscripts as a researcher at the University of California in Los Angeles, and she works in the Vatican archives. Sabrina said that Da Vinci's Last supper mural contains the mathematical and astrological puzzles (hidden code), which she has deciphered. The puzzle is the central half-moon window, or lunette above his painting of Christ with his disciples before the crucifixion pointed towards the "hidden code". Sabrina said that Da Vinzi's hidden code predicts that the end of the world begins in a universal flood on March 21, 4006 and ends on November 1, 4006. Sabrina said that Leonardo Da Vinci believed that this would be a new start for humanity.
If Leonardo Da Vinci has put hidden code to his painting and predicted that the end of the world begins on March 21, 4006, so he has erred.
In the gospels of Matthew and Mark the Lord Jesus tells that when will happen His coming and the end of the world. The Lord Jesus tells that His disciples shall know signs of the time when His coming and the end of the world is near, but not accurate day and hour. The Lord Jesus said also that day and hour knows no man, so no man cannot know the accurate date when is Jesus' coming and the end of the world.
God has promised that He shall not any more destroy the earth through the flood. God gave for a testimony the sign of the covenant between Him and all people of the earth. The sign is the bow (Rainbow) in the sky. Da Vinzi's predicted that end of the world would happen through the universal flood. But when in the Bible God has promised that He doesn't destroy the earth through the flood, it means that also that part of Da Vinzi's prediction is false.
http://koti.phnet.fi/petripaavola/davinciendoftheworld.html