Usually you can use your eggs past the expiration date. But how do you know if they are still good? Here's an easy test:
Put your egg into a bowl of cool water.
If the egg sinks to the bottom of the bowl, it is fresh.
If one end of the egg sinks, while the other end floats up (so the egg looks like it is "standing" on one end), then it's not fresh but still OK to eat.
If the egg floats all the way to the top, it's bad.