[Frank Sheed]

would you show me where (in the bible) that was instituted as a religious practice for the church?

It's the passage of the New Testament following the full description listing the Canon of Scripture book by book and the passage where Paul spells out specifically that Sola Scriptura is the only means of salvation.

[TNdandelion]

Maybe you misunderstood. Where, in the bible, did the church annually celebrate the birth of Christ and if they did, what time of year did they do it?

Again, I don't care if Christians do it or don't do it. It's not my business. It was a response to Philoponus' ridiculous suggestion that I participate in orgies and human sacrifice as my ancestors did. I say...."After you!"