Yes, Messianic Jews do celebrate Christmas, just as they also observe many of the other traditional Jewish holidays. Christmas is seen as a celebration of the birth of Jesus Christ, who is considered the Jewish Messiah by Messianic Jews. As such, they see the holiday as a significant part of their religious practice, and celebrate it with the same reverence and joy as other Christians. They often attend special Christmas services at their Messianic synagogues, and may also participate in other Christmas traditions, such as gift-giving and spending time with family and friends.