Cannabis labels list the date that the cannabis was packaged, which indicates when the ﬁnished product was placed and sealed in its ﬁnal packaging. Expiry dates, which are directionally used to communicate the stability of the product in regards to potency, are not mandatory in Health Canada regulations, so some licensed producers will provide them, but many do not. If the product is properly stored in a dark, dry place and in an airtight container, it should maintain its full potency until opened.