Celebrating Biblical and Jewish holidays is most characteristic of the Messianic Jewish movement, and it arouses much interest among Gentile Christians. This practice arose in the struggle of Hebrew Christians in the 19th century against -Christian assimilation-. From the 1970s onwards, a new generation of Messianic Jews identified strongly with their people s socio-cultural heritage, including the practice of Sabbath, Pesach and other Jewish holidays. A thorough analysis of calendars, reinterpretations, observances and motives shows that this is a novel, Christian-Judaic practice. Why and...