Every Jewish holidays are started with praise prayer called Hallel which is mostly from Psalm 113-118.
- The soul is known as the candle of G-d as King Solomon writes (Proverbs 20:27) "The candle of G-d is the soul of man". On this holy day when our souls are accentuated, we light a candle. One lights a 24 hour "Yahrtzeit candle" although it is not for the purpose of a Yahrtzeit.
Leviticus 23:27
2011: October 7-8
2012: September 25-26
2013: September 13-14
2014: October 3-4
2015: September 22-23
On Yom Kippur, a day of Moshiach in microcosm, we divorce ourselves from our needs for physical maintenance and rely on G-d...C. Ultimately, fasting on Yom Kippur is an expression of pure faith in G-d. Yom Kippur is compared to Shabbat, and Shabbat is compared to the Era of Moshiach. In the Era of Moshiach, G-d will obliterate hunger, starvation, need and blight from mankind. On Yom Kippur, a day of Moshiach in microcosm, we divorce ourselves from our needs for physical maintenance and rely on G-d, as we will when Moshiach comes.
http://www.askmoses.com/en/article/561,147/Why-do-we-fast-on-Yom-Kippur.html