Does eggnog have an expiration date if not on label?

If eggnog does not have a specific expiration date on the label, it is generally safe to consume within 5 to 7 days after opening, provided it has been kept refrigerated. Unopened eggnog may last for several weeks past the "sell by" date, but it's best to check for signs of spoilage, such as off odors or changes in texture. Always use your senses to assess its freshness, and when in doubt, it's safer to discard it.