Cream together the butter and 2cups sugar, until light and fluffy. Sift together the flour and baking soda and add it to the butter mixture, stirring until well blended. Beat in the eggs, buttermilk, 1tablespoon grated orange rind, the dates, and pecans.
Pour and scrape the mixture into a 4-quart tube pan and bake1 hour and 10 minutes, or until a cake tester inserted in the cake comes out clean. Do not unmold the cake.
Combine the remaining 1cup sugar with the orange juice and remaining 1tablespoon grated orange rind. Bring to the simmer, stirring until the sugar is dissolved. Gently plunge an ice pick or skewer in several spots on top of the cake and pour the orange juice mixture overall. Let stand 30 minutes or longer, until it is absorbed and the cake is cool. Unmold and serve cut into wedges.