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.
The Day of Atonement is considered the most important day of the Jewish year, as evidenced by the synagogue attendance rate: More people go to temple on Yom Kippur than any other holiday.
A young Jewish boy blows the shofar horn along the beach in the coastal city of Ashdod, Israel
during the ritual of Tashlich on Sept. 29, 2011. JACK GUEZ/AFP/Getty Images
The Cantor and choir of the Israeli Defence Forces sing U’netaneh Tokef, the moving prayer recited on Yom Kippur about God determining who will die and who will live in the coming year – with scenes from the 1973 Yom Kippur War.