open dating

noun
the practice of putting a freshness date on food packages.

Origin:
1970–75

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Dictionary.com's 21st Century Lexicon
Main Entry:  open dating
Part of Speech:  n
Definition:  the marking of packaged food products with a 'sell by' or 'use by' date or the date on which the product was packaged
Dictionary.com's 21st Century Lexicon
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Example sentences
Contractors who do not use open dating will provide a product code number key
  listing to each customer facility.
Contractors who do not use open dating shall provide a product code number key
  listing.
Contractors who do not use open dating will provide a product code number key
  listing.
The proposal will include, for public comment, proposed criteria on the use of
  open dating in meat and poultry products.
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