A message relating how Jonah told the Ninevites they would be destroyed, and yet they weren't, and how on Rosh Hashana a persons fate is written in God's book, but it can be changed before the closing of the gates on Yom Kippur.
Jonah is read every year on the most Holy Day in the Jewish calender, the day of Atonement. (Yom Kippur) To understand why we have to back up and explain a little bit about the Jewish feasts.
There are 7 major Jewish feasts. The Hebrew word for feasts (moadim) literally means "appointed