Yom Kippur 2009 starts at sundown on Sunday 27 September (Kol Nidre), and lasts all day Monday 28 September, 2009 until sundown. This day marks the culmination of the Days of Awe, the period between Rosh Hashanah and Yom Kippur. The Day of Atonement is described by Maimonides as "the universal time of repentance" (z'man teshuva lakol). It is spent praying and fasting.
Yom Kippur is mentioned biblically in Leviticus 23: 26-32http://www.jewishbyte.com/yomkippur.php
The Day of Atonement COVERED sin, but did not REMOVE sin. This is the meaning of Yom Kippur, the “Day of Atonement.” The Hebrew word Kippur means “covering,” not removal.
1 John 1:5-7
This is the message we have heard from Him and proclaim to you, that God is light and in Him there is no darkness at all. If we say we have fellowship with Him while we walk in darkness, we lie and do not live according to the truth; but if we walk in the light, we have fellowship with one another, and the blood of Jesus His Son, cleanses us from all sin.
