best-before date (on food); use-by date; expiry date; expiration date
with a fixed time; with a deadline
expiry date (esp. on food); expiration date; use-by date
term of validity; expiration date (of medicine, credit card, etc.)
expiration of a term; becoming overdue
expiry date; use-by date; date of expiry
to set a deadline; to fix a time limit
to have a time-limit expire; to pass a deadline; to pass an expiration date
to extend the term; to extend a deadline
freshness assured through this date
latest delivery designation