Totally over-engineered print-in-place date indicator to replace my post-it reminders for changing the water filter, the cat litter, etc.

It's the size of a small cookie (5cm diameter), so it needs a fine nozzle to print the details.

I printed in plain PLA with two color changes, 0.07mm layer height, 15% infill using a 0.25mm nozzle.
Stick a little velcro pad on the back to fix it somewhere.