Reply To: Yom Kippur like Purim

The holiest day is shabbos which has sekila and seven aliyos. It says by shabbos, ‘שבת שבתון הוא לה where as by YK it says שבת שבתון הוא לכם when YK falls on sbabbos, we fast as the kapara is an oneg shabbos. The Chasam Sofer shows the greatness of the neshama. The holiest you might say is the mishkan, the residence of Hashem. Its builing is not dacha, push away shabbos but pekuach nefesh, saving a live because of the neshama is dacha shabbos. So the neshama is the holiest. Maybe YK is the most productive dqy.