Yes and Christians already do wear hijab. Hijab is simply a covering. Their 'hijab' covers what they consider to be their modesty. That generally varies with time and place. In some parts of the Christian world the hijab includes a head covering, but that is on the decline.

For Gogo77 Western European Christians hijab covers most of the body, rekomendas fashion but does not include the hair, the cleavage or the legs up to the mid thigh.

Christian women's hijab is more extensive than men's at present.