[Uri’el-2012]

And what of whether or not Christmas is biblical? Even if a person subscribes to Sola Scriptura, he should know that tradition precedes the Gospels (not written until 65-80 A.D.). He should know that the present canon of the New Testament wasn't compiled until the year 397 A.D. -- after the institution of Christmas. He should know that there is nothing in Scripture forbidding tradition. There are, however, passages indicating the legitimacy of tradition, such as 2 Thessalonians 2:15, which states, "So then, brothers, stand firm and hold to the traditions that you were taught by us, either by our spoken word or by our letter [emphasis mine]."

The Canon was complete very much prior to 397CE.

When Paul was talking about Traditions,
since Paul was a Jewish Pharisee,
What kind of Tradition was Paul talking about ?

shalom b'SHEM Yah'shua HaMashiach

[Petronski]

...Paul was a Jewish Pharisee...

Well, Saul certainly was.

But St. Paul is Christian, a father of the Catholic Church.