Why do Christians not wear the turban as the Word of God commands in Zech.3:3-5?
The turban was the particular head covering for the high priest in Israel alone, not for the Israelites in general, nor even for the other priests [Ex.28:37-41]. In Zech.3, Joshua was the high priest and was to be clothed with a clean turban as was appropriate to his office. Christians are not Israelite high priests.