The answer to this question (Sherlock et al., 1991) is, of course, an "open date" or "open shelf-life date" on a food product. An open date refers to the date on packaged food that indicates when the product was packed, meant to be "sold by," or meant to be "used by." Such a practice has been in demand since the beginning of the 20th century. Just as with most games, open dating involves rules and regulations, defenders and opponents, and the potential to become a stronger presence in the league (of supermarket practices).
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