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How long does cheese, hard such as cheddar, swiss, block parmesan last?
Cheese, hard such as cheddar, swiss, block parmesan keeps for about 6 months in the refrigerator. Counted from the date of purchase.
| Where | How long |
|---|---|
| Refrigerator | 6 months |
| Refrigerator, after opening | 3 to 4 weeks |
| Freezer | 6 months |
Storage times are the USDA FoodKeeper guidance for quality and safety, not a guarantee; a printed use-by date on the package comes first. Source: USDA FSIS FoodKeeper (CC0), fetched 2026-10-27, category Dairy Products & Eggs.
How Known uses thisWhen a receipt lists cheese, hard such as cheddar, swiss, block parmesan, Known estimates an expiry from the purchase date and typical shelf life and shows which rule it used, for example "7-day rule". Shelf-stable staples get no date at all.
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