Rosh Hashana is known as the Day of Judgment, the day on which God judges the world. Yom Kippur, the Day of Atonement, is the day on which God finalizes His verdict on the judgments of Rosh Hashana.

But actually the days of judgment are not quite over.

According to tradition, as stated in the Zohar (III:31b): “This [Hoshana Rabbah] is the final day of judgment for water, source of all blessings. On the seventh day of Sukkot the judgment of the world is finalized and the edicts are sent forth from the King.”

The days of judgement are not, it seems, truly over until the seventh day of Sukkot. (Which is why some perform the tashlich ceremony until Hoshana Rabbah.) What is the connection?

On Rosh Hashana, God determines the fate and fortune of both individuals and communities for the year to come, including exactly how much one will earn in the coming year. Material endowments are one form of sustenance. On the holiday of Sukkot, however, God determines the world’s water allotment for the year to come.

Since God is still sitting in His heavenly courtroom deciding the fate of the world, there is time to slip in a final appeal or to do an extra act of kindness in the hope of altering the scales of justice in one’s favor. Because Hoshana Rabbah is considered a day of judgment, selichot (penitential prayers) are added to the morning service, in addition to the special prayers of Sukkot.