How long do sour cherries last?
Unopened, they keep in the cupboard for about 12 months. Once opened, in the fridge for about 5 days.
This refers to: Jarred sour cherries.

Shelf life of sour cherries at a glance
| Storage | Unopened | Opened |
|---|---|---|
| Cupboard | 12 months | – |
| Fridge | – | 5 days |
| Freezer | 8 months | – |
Keep unopened jars cool and dark, and refrigerate covered once opened. Fresh sour cherries last only 2 to 3 days, frozen 8 to 12 months.
Past its date does not mean spoiled
These are guide values for food stored correctly. A best-before date is not a throw-away date: many products are still fine after it. Check how it looks, smells and tastes. Mould, an unusual smell or a bulging can are reasons to throw it away. A use-by date is different: do not eat the food after it.