Robert Coster

Signalfire Expire Content allows you to set expiration dates and times for your WordPress posts and pages. When content expires, you can choose to automatically change it to draft status or redirect visitors to a custom URL.
Key Features:
<ul>
<li>Set expiration date and time for posts and pages</li>
<li>Choose expiration action: change to draft or redirect to URL</li>
<li>Easy-to-use metabox on post/page edit screens</li>
<li>Admin column showing expiration status</li>
<li>Automatic expiration checking on frontend</li>
<li>Security-focused with proper nonces and sanitization</li>
<li>Multilingual ready with translation support</li>
</ul>
Perfect for:
<ul>
<li>Time-sensitive content like promotions or events</li>
<li>Temporary pages that need automatic removal</li>
<li>Content that should redirect after a certain date</li>
<li>Managing seasonal or limited-time offers</li>
</ul>

Signalfire Expire Content

Adds expiration functionality to posts and pages with customizable actions when content expires.

Cyril Batillat

By default, WordPress can protect each post with one and only password. This plugin gives you the possibility to assign multiple passwords on each post, with an expiration date.

p5 : Plenty of Perishable Passwords for Protected Posts

Specify multiple passwords for pages / posts / custom post  types. An expiration date can be set for each password.

Signalfire Expire Content vs p5 : Plenty of Perishable Passwords for Protected Posts