The Date Code is located on the side label of the unit, in the bottom row of the chart, beside the letters PP or QQ.
NOTE: Only the FoodCycler FC-30 Platinum will have a Date Code. If your unit is a Smart-Cara CS-10, it will not have the same label as our units. We no longer carry Smart Caras. That model was discontinued and is only available through resellers (which we are not affiliated with).