Torah shield for Yom Kippur. Óbuda, beginning of the 19th century. The 10th day after Rosh Hashana is the most important holiday of Judaism: Yom Kippur, the Day of Atonement. Days between the two festivals are called Days of Awe, because according to the tradition, the fate of all people is “inscribed on the day of Rosh Hashana, and is sealed on the day of Yom Kippur.” Yom Kippur is a strict day of fast; it is forbidden to eat or drink. Those with lingering feelings of anger have to make peace before the time of the festival, and for the sins committed in the previous year they should be forgiven.