Boss's Day Gifts – Show Appreciation for The Man or Woman with these Unique Gifts Show your boss how much you appreciate him or her and they might just reciprocate the appreciation back. On Boss's Day, give your boss a great gift. Find all the presents and unusual gifts you need here at Mysterious Gifts. Available here are excellent gifts for men and women, top picks for getting a leg up the competition. Climb up the corporate ladder with these unique and unusual gifts for Boss's Day from Mysterious Gifts.