Yom Kippur is a time for Jews to reflect on their actions over the past year, to repent for their sins, and to ask God for forgiveness. The day is marked by a number of special prayers and rituals, including the Kol Nidre service on the eve of Yom Kippur, which is a prayer that annuls vows made over the past year.
Yom Kippur is also a time for Jews to fast. The fast begins at sunset on the eve of Yom Kippur and ends at nightfall the following day. During the fast, Jews are prohibited from eating, drinking, bathing, applying lotions or perfumes, wearing leather shoes, and having sexual relations.
Yom Kippur is a time of great spiritual significance for Jews. It is a day to come closer to God, to repent for one's sins, and to start the new year with a clean slate.