Garrett, you realize, after learning ttatt, that the witnesses are just like any other extremist group. The Amish have decided modernity is bad, so they live without machines and modern clothing. The witnesses have their own extreme ways. Since the time of Jesus, people besides Jews were acceptable to God, and their customs and diets too, aside from drinking blood and things sacrificed to idols. There was an outreaching. Paul said where some like to make certain days more special than others, that was their business. Witnesses don't read those scriptures.
Are some of these holidays pagan in origin? Partly. But I think what the Catholics did in the 300's was one of the better acts of humanity Catholicism has ever practiced....integrating some of their customs to make them Christian, instead of wiping them out, making Christianity easier to embrace. The early Christians did the exact same thing towards the Gentiles, it's all over the New Testament. The witnesses are stuck in the Old Testament.