This shows that the Apostles and the early Gentile Christians did not believe in christianizing paganism! This is key to interpretting Scriptures that most would like to twist to appear as though God approves of these ungodly pagan/papist traditions of men “holy” days.
(Now, perhaps I’ve overlooked the Scripture verse where Paul is telling these new converts to: “Stop! Don’t burn those books! We can make them right with God by christianizing them!”)