Unlike the American New Year, the Jewish New Year turns in the fall, based on the lunar calendar. Like all New Year’s celebrations, it comes with a party and a ton of food, but it also brings with it a time of thoughtful quietness in the form of Rosh Hashanah (New Year's Eve) and Yom Kippur (Day of Atonement). The 10 days between them known as the Days of Awe are considered the holiest days of the Jewish calendar.