"born again" literally means "born from above." —a spiritual transformation. New birth, being born again, is an act of God whereby eternal life is imparted to the person who believes (2 Corinthians 5:17; Titus 3:5; 1 Peter 1:3; 1 John 2:29; 3:9; 4:7; 5:1-4, 18). John 1:12,13 indicates that "born again" also carries the idea "to become children of God" through trust in the name of Jesus Christ.<quoted text>
You know the day you decided to believe in God.
You don't know the day that you will attain Heaven.
Before that we are spiritual dead, when we are born again, we pass from death into life, in a sense we go from the devils realm and enter in to Gods heavenly realm.