Do you also know about the trick to see if your egg is still fresh or if it has gone bad?
Don't tease us. What's the trick?
first you take the egg, then you consume it, now wait somewhere between 2 - 12 hours to see how good the egg was, if you get bad farts then the egg was fine, if the farts are accompanied by brown/green liquid then the egg was bad.
Alternatively you can put the eggs into a bowl of cold water, if they're fresh they'll sink to the end, if they float then they've taken in too much air through their porous shells and are likely to not be good enough to eat anymore.