When eggs reach their expiration date you shouldn't just through them away.
There is a few ways and tests that you can do to see if they are still fine.
I test my eggs to see if they are still eatable by doing the following tests.
Firstly I take a deep bowl and fill it up with water.
Now put the egg in the bowl and if the egg sinks straight to the bottom it is still fresh, if you put the egg in the water and it floats it means that it is old but may still be safe to eat.
Make sure the bowl is deep enough so that if you put the egg in the water you can be sure that it sinks when it goes to the bottom.
Seeing that the egg might still be eatable when it floats but just a bit old, I do the crack tests to see if it would be safe to eat.
What I do is I crack the egg on a separate bowl and through the egg inside.
I then smell the egg and if it gives off a unpleasant smell it is rotten and you need to through it away.
But if it still doesn't give of a smell I look at the egg white to make sure that it is safe to eat.
If the egg white has a pink look to it that means that it is off and not safe to eat.
Don't worry about red spots as they are only the blood vessels that occur during ovulation and has nothing to do with freshness.
One more thing to notice when looking at the egg white is this, if the egg white is cloudy then it is very fresh, if it is clear however it means that it is aging.