Keeping track of eggs’ age

We don’t use many eggs. We don’t bake many desserts. We don’t have eggs for breakfast. About the only thing we use eggs for regularly are omelets, e.g. this recent Sunday lunch of an omelet of scallions, cherry tomatoes, and blue cheese:

Sunday omelet: scallions, tomato, blue cheese

We buy eggs only half dozens at a time and usually have some laying around in the fridge for quite a while. (I know, eggs are better when fresh; we just don’t eat ebough eggs to always have fresh eggs on hand.) The way I keep track of what kind of eggs, and bought how long ago, is to tear off some of the labeling on the egg carton, write the purchase date on it, and put it in the egg carrier:

how to keep track of eggs' type and age