Fresh eggs can be kept in the fridge for up to 3 to 5 weeks from the date they were laid. Typically, there is a “sell-by” or “use-by” date on the carton that you can check to verify. To check the freshness of eggs, you can do a float test. Fill a bowl with water and gently place the egg(s) in it. Fresh eggs will sink to the bottom while older eggs that need to be discarded will float to the surface.