Zest both oranges into the canister of your blender. Then cut away the remaining rind and drop the fruit of each orange into the blender as well. Discard the rind.
Add the frozen mango, honey, ginger, and cinnamon and whir until smooth.
Divide half of the smoothie mixture between 2 glasses (reserve half in the blender). Add the frozen blueberries and greens to the reserved portion and blend again until very smooth.
Pour the blueberry smoothie mixture over the orange smoothie and briefly stir for a swirled, dual-flavored effect. Enjoy!