A refrigerated egg should stand up for at least a couple months. If you are trying to make eggs sunny-side up a fresher egg will be more helpful because the yolk is stronger and resists breaking. After a month it is more difficult to get that quality of yolk, but the quality of taste is still fine. I have kept eggs for three weeks after end-of-code, which is nearly three months, and I’m still here to type my answer. Eggs that are more than two months old have yolks that break on contact with relative ease, but they are still a-ok for eating, just without that pleasing to the eye sunny-side look,