The Early Christians
n“Anicetus argued for Easter while Polycarp, a student of the apostle John, defended observing ‘the Christian Passover, on the 14th of Nisan, the first month of the Jewish ecclesiastical calendar, regardless of the day of the week’ ”
- Encyclopaedia Britannica, 15th edition, Micropaedia, Vol. 8, p.
94, "Polycarp".