Ga 4:8 But then, indeed, when you did not know God, you served those which by nature are not gods.
Ga 4:9 But now after you have known God, or rather are known by God, how is it that you turn again to the weak and beggarly elements, to which you desire again to be in bondage?
Ga 4:10 You observe days and months and seasons and years.
Ga 4:11 I am afraid for you, lest I have labored for you in vain.
Ga 4:12 Brethren, I urge you to become like me, for I became like you. You have not injured me at all.
Paul kept the Jewish holy days, and told them to be like him. Who changed things?? TWTaylor