Do you know why there are no Holy Liturgies during Monday, Tuesday, and Wednesday of Holy Pascha week?
Since the lamb of the Passover used to be purchased on the 10th day of the month then kept to the 14th day, it was slaughtered after that at sunset (Exodus 12:36).
Since the beginning of Passover was Saturday on the year our Lord was crucified, then the slaughtering of the lamb who have taken place on Friday the 14th day of the month of Nissan at sunset. Since our savior established the new covenant one day before the slaughter of the Passover lamb, therefore there are no sacrifices until the establishment of the Eucharist on Thursday