The ten days between Rosh Hashanah and Yom Kippur are known as Aseret Yemei Teshuvah, or the Ten Days of Repentance (more accurately translated as the Ten Days of Return).

When the prophet Isaiah tells the Jewish nation to repent for their sins, he says, “Seek G‑d when He may be found; call Him when He is close.” When is that? The sages say that this verse refers to these ten days, when G‑d is especially close to us.

The sages describe this period as a time when “the gates of heaven are open, and I will listen to your prayers.” ... Read more about the 10 Days of Repentance