What is Rosh Hashanah?

In the Jewish faith, Rosh Hashanah is a two day high holy day festival that marks the beginning of the New Year. While the two day holy day is actually 48 hours long, it is considered one long day in terms of tradition. The holy day most often occurs in the month of September, but is actually celebrated on the first two days of the seventh month of Tishri, also known as the Jewish calendar.