Every individual bottle of beer packaged for sale in the United States shall have a 4-digit code signifying the year and day that it was placed in the bottle clearly marked in white or yellow ink on the neck of the bottle. It must be placed in such a manner that the consumer need not remove the bottle from its container to see the date code. Its minimum height is to be 4mm.

If a bottle is to have special packaging like wax or foil around the neck of the bottle that would cover the standard marking, the code may be moved to the side of the bottle.

Every individual can of beer packaged for sale in the United States shall have a 4-digit code signifying the year and day that it was placed in the can clearly marked in black ink on the bottom of the can. It's minimum height is to be 4mm.

Concerned BA in Indiana