Remember that the pursuit of happiness, in the Declaration, is not a quest or a pastime, but an unalienable right.. Everyone has the right to actually be happy, not just try to be happy. To use a metaphor: You don't just get the chance to make the baseball team, you are guaranteed a spot.
How long does an unopened package of mayonnaise last at room temperature? Properly stored, an unopened package of mayonnaise will generally stay at best quality for about 3 to 4 months after the date on the package.
Unopened vinegar and oil dressings, like balsamic vinaigrette, will stay fresh for up to four months past the written expiration date. For the most part, this will give the unopened bottle of dressing a shelf life of one or two years, if kept in a cool dark place, like your pantry or cellar. Once a bottle of salad dressing is opened, the shelf life diminishes rapidly. Creamy dressings can be kept for up to four months in the refrigerator, and oil and vinegar based dressings should be consumed within six months.