Rosh HaShanah (literally, "Head of the Year") is the Jewish New Year, which marks the beginning of a 10-day period of prayer, self-examination and repentance. This period, known as the Yamim Noraim (Days of Awe or High Holy Days), is widely observed by Jews throughout the world, many with prayer and reflection in a synagogue. There also are several holiday rituals observed at home.
Rosh HaShanah is celebrated on the first day of the Hebrew month of Tishrei, which—because of differences in the solar and lunar calendar—corresponds to September or October on the secular calendar. Customs associated with the holiday include sounding the shofar, eating a round challah, and tasting apples and honey to represent a sweet New Year.
When you enter the land that the Eternal your God is giving you as a heritage, and you possess it and settle in it, you shall take some of every first fruit of the soil, which you harvest from the land that the Eternal your God is giving to you, put it in a basket and go to the place where the Eternal your God will choose to establish the divine name. - Deuteronomy 26:1-2