The best-before date on food — the period during which the producer guarantees optimal flavor or quality. It is a guideline; food may still be safe after this date but quality can decline.
このヨーグルトは賞味期限が明日までだ。
This yogurt is best before tomorrow.
缶詰は賞味期限が長いものが多い。
Canned food often has a long best-before date.
賞味期限は目安なので、見た目やにおいも確認してください。
The best-before date is a guideline, so also check appearance and smell.