Candy canes do not technically expire in a way that makes them unsafe to eat, but they do degrade in quality and flavor over time. If exposed to moisture, traditional peppermint canes can become sticky, discolored, or develop a gritty texture. Storing them in a cool, dry pantry helps them maintain their hard crunch and minty taste for many months. Most candy canes remain enjoyable past their printed best by dates if kept properly sealed.