How long after expiration date can you drink milk?

The Dairy Council of California specifically states on their website that it is perfectly safe to drink milk even up to seven days past the best-by date (NOT an expiration date, best-by or use-by dates indicate when the quality of the product -- taste, texture, odor, appearance -- would begin to lessen, not when the product would be unsafe to consume. Sell-by dates indicate the date after which the original store can no longer sell the product; I often find such post-dated products at dollar stores, with a notice on the shelf nearby informing the customer of the fact that it is both legal and safe to sell, buy, and consume certain products past their sell-by dates). The key with milk is to check for spoilage by smelling it before you drink it, and to store it in the fridge between 38 and 40 degrees Fahrenheit, keeping the door shut as much as possible, and not leave it out on the table or counter, even if you're going to be using it repeatedly.