How do you decode expiration dates?

Answer 1

You'll see a number stamped onto the cans or bottles, the first 5 numbers of that number tell you when the beer was packaged. The first 2 numbers are the year and the next 3 numbers are the day. The day is based off of a 365 day calender, so if the 3rd, 4th, and 5th numbers were 131, it would mean the beer was canned on the 131st day of that year, so probably sometime in May for example.