With the " Nicene period " came a great development on the criminal side.
The British and Celtic churches always kept Easter according to the Nicene decree on a Sunday.
The orthodox Nicene party, notably Athanasius himself, held communion with Paulinus only; twice, in 365 and 371 or 372, Meletius was exiled by decree of the Arian emperor Valens.
Meanwhile, under the influence of his situation, Meletius had been more and more approximating to the views of the newer school of Nicene orthodoxy.
Up to the Nicene Council the Church kept Easter coincident with the Jewish Passover, but after that period took elaborate precautions to dissociate the two.