One could, of course, claim that the act took place on good Friday, or at the ascension, or on Pentecost.  All of these were part of the climactic worship of God by Jesus. But I think the resurrection holds pride of place, and celebrating Easter opens up to us the nature of every Sunday worship service.

In the sacrificial system of the OT, the victim is laid on the fire and transfigured into smoke that ascends to God.

1. The fire on the altar is not a penalty; that already happened when the animal was slain. Blood had to be displayed to even get the animal to the alter, just as the priest had to display blood to pass into the Holy Place in the Tabernacle/Temple and then more if he was the high priest to enter the Holy of Holies.
2. So Jesus, shed his blood on the cross, and especially displayed the blood of the spear wound to show that he had died. Thus the victim was slain.
3. But then Jesus was transfigured by the Holy Spirit in new life. This was prefigured in the sacrifices by the fire on the altar.
4. Jesus completed his work by ascending into Heaven in a cloud. This was prefigured by the victim going up in smoke from the altar.
5. Then Jesus gave the same Spirit (as fire) that raised and transformed him to his disciples at Pentecost. I am not as sure about this, but I think this too is prefigured by the sacrifices in that portions of them were eaten by the priests and by the offerers.
6. So in all this one can see that the sacrifice is not only a substitutionary suffering, but a representative vindication and reconciliation. A true at-one-[move]ment. Jesus work on the cross and in the grave and in new life and enthronement was all sacrificial.

But if Jesus was fulfilling the sacrificial system in history, in the course of his own life (and death and resurrection), that means that his life was one grand worship service. In fact, since Jesus came in the fullness of time as the true Israel and the true Humanity, it means that all human history beforehand was the grand processional of the human race into the presence of God.

And it means when we worship God we are entering into and depending upon Jesus past act of worship. We offer ourselves by virtue of Christ’s death in our place, and deal with our own sins by confession and faith to receive pardon. We offer ourselves again in appealing to God’s Spirit to raise us up and to renew us in the Heavenly places. And we are restored to God’s presence at his table eating and drinking with him in the Lord’s Supper.

“I covenant to give you, as my Father covenanted to give me, a kingdom, that you may eat and drink at my table in my kingdom and sit on thrones judging the twelve tribes of Israel.”

Every Sunday is a memorial of the Lord’s resurrection, and every Sunday worship service allows the Church to participate in Christ’s resurrection by faith.