First, very little, if anything, of the rabbinic Seder practices can be read back to the early part of the first century C.E. Second, Jesus’ Last Supper with his disciples did not take place on the first night of Passover.


The rabbinic Seder ritual was developed after 70 C.E. (and therefore almost two generations after Jesus’ death in the early 30s C.E.). If the Seder didn’t really exist until after 70 C.E., it could not have been practiced whenever Jesus had his Last Supper, Passover or not.