Rosh Hashanah
Rosh Hashanah (ראש השנה rōsh hashānāh, beginning of the year) is the Jewish New Year, and falls on the first and second days of the Jewish month of Tishri (September/October). The Mishnah, the core work of the Jewish Oral Torah, sets this day aside as the new year for calculating calendar years and Sabbatical and jubilee years.
Rabbinic literature describes this day as a day of judgment. God is sometimes referred to as the "Ancient of Days." Some descriptions depict God as sitting upon a throne, while books containing the deeds of all humanity are opened before Him.
Prayer services are longer than on a regular Shabbat or other Jewish holidays, and include (on weekdays) the blowing of the shofar. On the afternoon of the first (or the second, if the first was Saturday) day, the ritual tashlikh is performed, in which sins are "cast" into open water, such as a river, sea, or lake.
Read more about this topic: High Holidays