Q: Why do you keep the Jewish holidays?
A: The holy days and festivals given in Scripture aren't Jewish. G-d describes them as His festivals. (Leviticus 23:2)
Although the Jewish people are most noted for keeping these festivals, they do not belong to the Jews ... they belong to G-d. The Hebrew word moed that is often translated as "festival" or "feast" actually means "appointment". G-d the Holy and Divine King has decreed some appointments so that corporately we can meet with Him.