Important Bar/Bat Mitzvah Information about the Jewish spiritual practice called Shabbat. Ask most Jews what the holiest day of the year is and assuredly the answer you will most likely hear is “Yom Kippur.” While Yom Kippur is certainly a very holy day, did you know that within the Jewish tradition there is also a deeply-held conviction that each and every Shabbat is the holiest day of the year? This is why Yom Kippur, the Day of Atonement, is also referred to as the “Sabbath of Sabbaths.” Every Shabbat, Jews practice traditions that are enriched with spiritual meaning. In this article, let us explore these deeper meanings.