Yom Kippur is not a recent spiritual exercise by Jewish people; it is a tradition that can be dated back to the biblical period, especially after Moses smashed the ten commandments on the golden idol built by Israelites. The Israelites started Yom Kippur as a way of seeking God's forgiveness over their past mistakes. Yom Kippur is observed alongside some traditions that must be adequately followed. You must not eat on Yom Kippur. It is a period of fasting, and this lasts for 25 hours.
Fasting is seen as a means of practicing self-denial. It is believed that fasting helps in renewing one's soul, body, and spirit. Yom Kippur is not only about fasting; it is a period to offer prayers to God. You are actually confessing your sins and mistakes as you pray. On Yom Kippur, you see almost everybody appearing on white. Putting on white is seen as a sign of holiness. Also, you must be ready to partake in every service as you fellowship with other people to offer prayers and sacrifices to God.