If eggs are properly refrigerated they should remain usable for several weeks. Most eggs have a 4 week expiration date on the carton. That means they may be sold up to four weeks after they are placed in the carton and the consumer will still have plenty of time to use them. Keeping eggs in the carton in the refrigerator will extend the shelf life. Keeping eggs at a temperature below 40° F, but above freezing and at a high humidity is the ideal way to maximize the shelf life.