Yom Kippur is a holiday observed by Jews and Samaritans and is considered the holiest day of the Jewish year. It is also known as the Day of Atonement and takes place annually on the 10th of Tishrei, corresponding to a date in September or early October. Yom Kippur is primarily centered on atonement and repentance, and the days main observances consist of full fasting and ascetic behavior accompanied by a long prayer service in synagogue, as well as sin confessions. The purpose of Yom Kippur is to effect individual and collective purification by the practice of forgiveness of the sins of others and by sincere repentance for one’s own sins against God. Yom Kippur is a Jewish holiday.