Let me applaud that! Small redundancies like these in writing lessen ambiguity and cognitive load. Although "2023" is longer than "23" it is more readily apparent as a year when e.g. looking/scanning for dates in the fridge. You might be saving your future brain some precious energy in writing full years instead of shortened ones. (Only half joking, the same could presumably be achieved by a well layed out label with ample white space and good typography.)