The paschal lamb was not necessarily a firstling, but only in the first year of its life (Exod.
With the Jewish Christians, whose leading thought was the death of Christ as the Paschal Lamb, the fast ended at the same time as that of the Jews, on the fourteenth day of the moon at evening, and the Easter festival immediately followed, without regard to the day of the week.
If the Paschal full moon was, as in later Christian times, the first after the spring equinox, the difficulty would be reduced to the question on what day the equinox was reckoned.
92b), as originated by Hippolytus's Paschal cycle of A.D.
Shortly after his unanimous election to succeed Paschal II.