of the show's departed cast and crew reached a distinctive destination in a designated voyage, and it was time to move on. William Asher, 1996
Quick Answer. If unopened and left in a pantry, Miracle Whip can last for a week past its use-by date; if opened, it can last for a month past its use-by date if refrigerated before it goes bad. A person should also check other dates on a jar of mayonnaise, such as the sell-by or best before dates. Keep Learning.
The rules for these two are as follows: Mayonnaise: Good for 3-4 months after date on package if unopened and stored in the pantry. Good for 2-3 months after date on package if opened and stored in the refrigerator. Ketchup: After opening it is good for 1 month in the pantry and 6 months in the refrigerator. But before it is opened it is good for up to a year in the pantry.