Definitions for "Rosh Hashana"
(Judaism) a solemn Jewish feast day celebrated on the 1st or 1st and 2nd of Tishri; noted for the blowing of the shofar
Creation of the world - begins 10 days of repentance and self examination during which God sits in judgement.
Traditionally Jewish New Year, celebrated on the First of Tishri (September/October), the same as what the Bible calls "the Feast of Trumpets" (Lev. 23:23-25, Num. 29:1-6).