Even though the eventual coming of the messiah is a strongly upheld belief in Judaism, trying to predict the actual time when the messiah will come is an act that is frowned upon. These kinds of actions are thought to weaken the faith the people have in the religion. So in Judaism, there is no specific time when the messiah comes. Rather, it is the acts of the people that determines when the messiah comes. It is said that the messiah would come either when the world needs his coming the most (when the world is so sinful and in desperate need of saving by the messiah) or deserves it the most (when genuine goodness prevails in the world).