Rosh Hashanah (Hebrew: רֹאשׁ הַשָּׁנָה‎, literally "head of the year") is the Jewish New Year. The Biblical name for this holiday is Yom Teruah (Hebrew: יוֹם תְּרוּעָה‎, literally "day [of] shouting/raising a noise") or the Feast of Trumpets. It is the first of the High Holy Daysor יָמִים נוֹרָאִים Yamim Nora'im ("Days of Awe") which usually occur in the early autumn of the Northern Hemisphere. Rosh Hashanah is a two-day celebration, which begins on the first day of Tishrei. Tishrei is the first month of the Jewish civil year, but the seventh month of the ecclesiastical year.
The day is believed to be the anniversary of the creation of Adam and Eve, the first man and woman, and their first actions toward the realization of humanity's role in God's world. Rosh Hashanah customs include sounding the shofar (a hollowed-out ram's horn) and eating symbolic foods such as apples dipped in honey to evoke a "sweet new year".
This information is taken from Wikipedia - http://en.wikipedia.org