Yom Kippur (Day of Atonement) is unique among the appointed times of the LORD. It’s the only holy day in which the people do very little, while one man, the high priest, does everything. Messiah Yeshua (Christ Jesus), our high priest, sacrificed Himself for us and carried our sins away too, as the symbols of Yom Kippur memorialize. All the people are asked to do is humble themselves, do no work and bring an offering to the Tabernacle/Temple.
Without a Temple, what can we bring to God? It’s not about following the Torah to the letter with a physically perfect abstinence from food and water, but as Yeshua taught us, it’s about caring for those around us as we want them to care for us. The Torah is a covenant of life, not of death.