The day before Rosh Hashanah is the last day of the year, and it is the last opportunity to repent before the Day of Judgment. It is a day of reflection on the year gone by, and a day of preparation for the coming year.
Blowing of the Shofar, Lulav, and Megillah on Shabbat.
The Sacrifice: The Difficult Test.
Why spread out the many reasons.
The force of repentance with the Torah.