So, on the Passover night before his death on Friday, Nisan 14, 33 C.E., he started a memorial of his sacrificial death.
... When he took the Memorial wine cup, he said to his eleven faithful apostles: “Drink out of it, all of you; for this means my ‘blood of the covenant,’ which is to be poured out in behalf of many for forgiveness of sins.’” (Matt. 26:27, 28)