Run out of eggs? They last for several months past the expiration date. If we have less than 2 dozen eggs in the fridge when I go to the grocery store I buy more. I have never thrown an egg in the garbage.
EDIT to add:
If you are unsure if the egg is still good put it in a glass of water. Fresh eggs are denser and will sink to the bottom of the glass. As they age they release gas inside the egg. Once the egg has enough gas that it doesn't sink to the bottom and instead floats, it's spoiled and should be tossed. I've tested eggs that were up to 3 months past the expiration date and they sank. They tasted fine and no one has gotten sick yet.
For all you frugal foodies, there's a series of cookbooks by an Alaskan State Trooper....Low Bush Cookbook or something like that, that goes into how 'boat' eggs from when AK only got groceries via barge from Seattle could be 6-8 months old when you bought them tasted...not fresh, but still eggs.
And....in the USA 'most' organic store-bought eggs (yes, even the ones you buy at Trader Joe's) have been coated with a (SUPPOSEDLY) "food grade petroleum" product (vasoline type crap). This inhibits the airflow in/out of the shell and keeps the egg fresh longer. High price, to me, if it means I'm eating vasoline every morning.
Supposedly in Ireland (per a person I used to work with) and parts of Europe it is illegal to refrigerate eggs for sale as real fresh eggs should be used in a few weeks....it's easier to tell if they're fresh when not put in cold storage.
Logically: a growing chick needs air to survive, so there has to be a natural way for it to absorb some through the shell.
Last weird fact: if you go to backyardchickens.com, you'll find threads where people with incubators (and obviously too much time on their hands) have actually bought organic fertilized eggs (usually without the goop on them) and grown them to chickens. Poor success rate if I recall...possibly a result of the egg being scalded clean prior to boxing.