In a bowl, dissolve gelatin in boiling water completely. Add orange zest and cranberry sauce, and stir until cranberry sauce is melted and combined with gelatin.
Stir pineapple and celery into gelatin. Pour into an 8x12 inch baking dish or 1 1/2 quart mold. Chill until firm, about 3-4 hours. Makes 8 servings. Enjoy!