Preheat oven to 400F. Grease 9x9x2 inch square pans.
Simmer uncovered, dates, water and sugar 7-10 minutes until thick. Cool.
Sift flour and salt together. Add Brown Sugar. Using a pastry blender, cut in margarine until the size of small peas. Mix in oatmeal. Pack half the mixture in to the bottom of the pan; top with the date mixture. Add remaining oatmeal mixture to form top layer.
Bake 45-50 minutes until tan on top. Cool upright in pan on a wire rack and cut into bars.