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.)

We used to have to write the date at the top of every work page in school and draw a margin strictly with a ruler. At the time naturally I hated the arbritrariness of it but I really appreciate it as an adult. It feels a lot easier to be confident and break away impostor syndrome when you work with little rituals like this. Similar to how I was taught to write with all caps on engineering documents for legibility. It makes very little actual difference, it just feels professional, and I think inspires me to take a little more pride and care in other areas.