Proverbs 4:18 But the path of the just is as the shining light, that shineth more and more unto the perfect day.
Many do not believe this verse. They think we've already reached the high water mark of knowledge. They think that we will know much about the end (which we've already learned) but we'll not learn anymore details such as its timing. The Bible indicates that's not the way it will go. Instead, God will shine greater and greater light unto our path (Thy Word is a light unto my feet) which leads to the new heaven and new earth.
The fact that we have continued to learn more and more information after May 21, 2011, which means after the Great Tribulation ended, is proof of God's plan to increase knowledge all the way to the perfect day (the last day).