NateJacobs

Expires a user’s access to a site after a specified number of days. It uses the user registered date/time and an admin configured number of days to determine when to expire the users access. The administrator can restore a user’s access from the user’s profile page.
There is a filter available for developers to hook into and alter the expiration date of a specific user on the fly during authentication. The filter uae_expiration_date passes the current expiration date and the WP_User object.

User Access Expiration

A user's access to a site is disabled after a specified number of days. The admin can set the number of days since registration to deny access.

Steve

Content Expiration is a WordPress plugin that allows authors/editors to set an expiration date on posts or pages. The plugin is intended to be simple with easy-to-read code.
An expiration can be set by specifying a number of days (e.g., expire in 90 days) or a specific date/time (e.g., May 10, 2018 at 10:00 PM). Two weeks prior to the expiration date, the author of the post/page is sent a warning email. The author receives another notification email upon expiration.
When a post/page expires, it is not deleted. Instead, it is given a status of Expired and hidden from public view. Visitors to the site will receive the regular WordPress 404 Page Not Found error.
The expiration can be reset by any editor or administrator of the site. They must log in and edit the expiration settings of the post/page.
Content Expiration is developed on GitHub. Please submit bugs reports and contributions on <a href="https://github.com/srguglielmo/Content-Expiration" rel="nofollow ugc">the GitHub Project page</a>.
For general support and questions, please use the <a href="https://wordpress.org/support/plugin/content-expiration/" rel="ugc">WordPress support forum</a>.

Content Expiration

Content Expiration is a WordPress plugin to set an expiration date on posts or pages.

User Access Expiration vs Content Expiration