How long can you keep open fresh milk in the refrigerator after due date?

Milk is sold (if properly handled in the store) with an expected shelf life of five to seven days after the expiration date. The expiration date is for the store, not for you the consumer. That seven days is dependent on your fridge being good and cold (38 degrees Fahrenheit or colder). The colder your fridge is the longer it will keep. Signs that the milk is past it's prime include curdling in warm liquids, off odors and in the extreme - clumping.

Give it a sniff and if in doubt, throw it out!