Rosh HaShanah

Start of the Year; The “Day of Judgment” for all individuals and for all nations. One of the Mitzvot, or Commandments associated with this holiday is the blowing of the Shofar, the Ram’s Horn, which portrays our sighing and wailing before the Master of the Universe on this Awesome Day. Yet, we eat sweet foods and other symbolic foods to show our optimism for a good outcome of our heavenly trial. In the Rosh HaShanah Prayers, we recite three special prayers, in which we accept the Kingliness of Hashem, attest to his complete knowledge of our deeds, and even our thoughts, and recall the great goodness which He did for us when He gave us the Torah.

Taken from: http://www.ou.org/about/judaism/r.htm#roshhashanah