Yom Kippur means a " day of atonement " in Judaism is the most sacred holy day falling on the 10th day of the Jewish Month of Tishri (usually late September or early October). Based on the Gregorian calendar.
Yom Kippur is a day set aside to "afflict the soul," to atone for the sins of the past year. This day is, essentially, ones' last appeal or chance to change the judgment, to demonstrate your repentance and make amends. Jewish people usually most part of this festival in the synagogues taking part in services of worship and prayers