Yom Kippur is the Jewish holiday that falls on Monday, September 25, 2023. It is the holiest day of the year in Judaism and is considered the "Day of Atonement". Yom Kippur marks the end of the 10-day period of repentance and reflection known as the "High Holidays," which began with Rosh Hashanah. On this day, Jewish people reflect on their sins and ask for forgiveness from God and those they have wronged. They also believe that God will decide if they will live or die in the year ahead. Yom Kippur is typically celebrated with a day of reflection, prayer, and fasting.