Yom Kippur, also known as Day of Atonement, is one of the most important holidays in Jewish custom. Yom Kippur occurs on the 10 day of Tishri, the seventh month of the Jewish year. This day is a day of reconciliation and a day to draw closer to God through Fasting and prayer. According to Jewish tradition, Yom Kippur is the day when God decides our fate. (Sacks) This day is considered the last appeal, a time to repent and make amends the sins of the past year. There are three essential components of Yom Kippur: Teshuvah, Prayer and Fasting.
As I mentioned before, Yom Kippur is a day of atonement but it only atones for the sins between man and God. It does not atone for the sins against committed against a person. During Teshuvah Jews are encouraged to seek out anyone they have offended and ask for forgiveness so that they can start the Jewish New Year with a clean slate.
There are several stages of Teshuvah that include the person who has sinned recognizing their wrongs, asking for forgiveness and committing to never sin again. Jewish tradition requires the person who was sinned against must forgive the sinner by the third request if the sinner shows that he or she is indeed remorseful. (http://www.jewishvirtuallibrary.org/jsource/Judaism/holiday4.html) I read an interesting point that it has been argued that a murderer cannot be forgiven for their sins because they would be required to ask the person they killed for forgiveness. (http://www.jewishvirtuallibrary.org/jsource/Judaism/holiday4.html) Therefore, murder long with fraud of the public and ruining a person name is unpardonable.
The longest service in the Jewish Synagogue is during Yom Kippur. The opening prayer that takes place on the evening before Yom Kippur is called Kol Nidrei. Kol Nidrei is written and recited in Aramaic, the family of languages or dialect that belongs to the Semitic family. (Johnson) It must be said before sunset and is said three
Cited: http://www.jewishvirtuallibrary.org/jsource/Judaism/holiday4.html. Jewish Virtual Library. 2013. website. 28 February 2013. Johnson, Paul. A History of the Jews. New York : Harper Perennial, 1988. Hardcover. Sacks, Rabbi Jonathan. "Koren Sacks Yom Kippur Mahzor." Koren Publishers Jerusalem, 2012.