The answer is: Annually

Lev 16:29-34 - The Day of Atonement was the holiest day of the year for Israel.

The Day of Atonement, or Yom Kippur, holds a special place in the hearts of many. It's fascinating to note how this day represents more than just routine rituals; it carries profound themes of forgiveness and renewal. Annually, as instructed in Leviticus, the Israelites engaged in a unique set of practices intended to atone for communal transgressions – culminating in the act of sending a scapegoat into the wilderness, symbolically carrying away the people's sins.

In ancient Israel, this day required total focus on repentance. It incorporated fasting and reflection, allowing individuals to not just acknowledge their mistakes but seek a true commitment to change. You could say it was a divine reset—a fresh start that many would wish for in their modern lives!

This emphasis on atonement resonates well beyond Israel's borders. Cultures around the world and throughout history have rituals of atonement and purification. Isn’t it intriguing how humanity often arrives at the same fundamental conclusions about needing to set things right?

Interestingly, within Rabbinic tradition, the Days of Awe immediately preceding Yom Kippur are seen as a golden chance for personal introspection and community reconciliation. These principles echo today: many believe we can still take the spirit of this observance and practice forgiveness in daily life, creating better relationships and healthier communities. A universally valuable lesson, it seems, is rooted deep in the scripture!