The Passover Reviewed (Deuteronomy 16)

      for in the month of Abib, (April), the Lord you God brought you out of Egypy by night.   Therefore, you shall sacrifice the Passover to the Lord, your God, from the flock and the herd, in the place where the Lord chooses to put His name.  You shall eat no leavened bread with it; seven days you shall eat unleavened bread with it, that is, the bread of affliction (for you came out of the land of Egypt in haste), that you may remember the day in which you came out of the land of Egypt all the days of your life.