core + bib (Bibliographic Extension): terms relating to books and bibliography.

expires

Canonical URL: http://schema.org/expires

Thing > Property > expires

Date the content expires and is no longer useful or available. For example a VideoObject or NewsArticle whose availability or relevance is time-limited, or a ClaimReview fact check whose publisher wants to indicate that it may no longer be relevant (or helpful to highlight) after some date.

Usage: Between 1000 and 10,000 domains
Values expected to be one of these types
Date
Used on these types
CreativeWork

Schema Version 3.3