Council of Nicea in 325 and Council of Antioch in 341 -
Christians forbidden to celebrate Passover with Jews.
The Council of Nicea gives the text of the Nicene Creed, refutes the errors of those who deny the Trinity, proclaims that heretics who have been correctly baptized do not need to be rebaptized, and that Viaticum may be given to any heretic who requests it on his death-bed; however, should he live, and if he persists in his heresy, he will not receive Holy Communion in the assembly of the faithful.
There is no mention of the Jewish Passover that I can find, nor any instruction to Catholics regarding it.
I can’t find any record of a Council of Antioch in 341, or any Council of Antioch at all.
There is a Council of Serdica in 343 AD, which proclaims that no Bishop should move from one Diocese to another without the permission of the Bishop of Rome, and that in the case of a Bishop who is under investigation for any kind of wrong-doing, his position will not be taken by another until the Bishop of Rome has decided against him and found him guilty of whatever it was that he was accused of - and at that point, it falls to the Bishop of Rome to appoint another Bishop in his place. If he is found innocent of the charges, he resumes his place and continues his work as before.
There is no mention of the Passover of the Jews in this Council, nor any instruction to Catholics regarding it.
There are only two mentions of the Church at Antioch in the accounts of the Councils of the Church and Papal Decrees - the first is to mention that the Church at Antioch was under attack by pagan men from Mongolia, and was in need of prayers and material support. (Boniface I,
To the Macedonian Bishops, 422 AD)
The second was simply to mention in passing that St. Peter had been Bishop of Antioch during his career, but that his Bishopric is in Rome because that is where he died. (Gelasius I,
On the Primacy of the Bishop of Rome, 495 AD).