Today at sunset marks the beginning of Yom Kippur (Day of Atonement), the holiest day in the Jewish calendar. Here is the biblical injunction:
Mark, the tenth day of this seventh month is the Day of Atonement. It shall be a sacred occasion for you: you shall practice self-denial, and you shall bring an offering by fire to the Lord; you shall do no work throughout that day. For it is a Day of Atonement, on which expiation is made on your behalf before the Lord your God. (Lev 23:27-28)
As a devout Jew, this would have been the holiest day of the year for Jesus of Nazareth. Would you assume that he believed, based on the Torah passage above, that expiation for sin was made on his behalf on this day?