Yom Kippur is observed on Sept. 22-23 in 2015. Known as the Jewish Day of Atonement, Yom Kippur falls on 10 Tishrei 5776 on the Hebrew calendar, which is from sundown on Sept. 22 to nightfall on Sept. 23.
During the Days of Awe, Jews seeks forgiveness from friends, family and co-workers, a process that begins with Tashlich, the symbolic casting off of sins that is traditionally observed on the afternoon of Rosh Hashanah by throwing bread into a body of water. On Yom Kippur, Jews attempt to mend their relationships with God. This is done, in part, by reciting the Vidui, a public confession of sins. The holiday has the most extensive prayer schedule of the Hebrew calendar and arduous abstinence from food, drink, sexual intimacy and animal-based clothing, such as leather.
All major Jewish holidays, including Yom Kippur, consist of four main prayer services:Ma’ariv, Shacharit, Musaf and Mincha. Yom Kippur, though, is unique. It begins with Kol Nidre, a legal document that is hauntingly chanted and emotionally charged. The Book of Jonah is read during the afternoon prayer service on Yom Kippur day.