Place dates, brown sugar, water and butter in a saucepan and simmer until dates are soft. Remove from heat and add chocolate chips. Add eggs, orange juice, and milk and stir. Combine baking soda, flour, salt, and walnuts and fold into date mixture. Pour into a greased 13x9" baking pan and bake for 30 minutes at 350 degrees. Allow to cool and prepare glaze and drizzle over bars. Cut into squares and serve.