Bill Erickson

<p><strong>Warning</strong> This plugin is no longer supported, and does not always work with the Gutenberg block editor.</p>
<p>I recommend using <a href="https://wordpress.org/plugins/change-last-modified-date/" rel="ugc">Change Last Modified Date</a> instead.</p>
<h4>Summary</h4>
<p>Prevent the <em>modified date</em> from changing when making minor changes to your content.</p>
<p>This plugin adds a checkbox to the Publish box, “Don’t update the modified date”.  When checked, saving your post does not update the post modified date.</p>
<p>Minor changes like adding tags or fixing typos won’t bump the modified date.</p>
<p>This plugin will <em>maintain</em> the previous modified date. It <strong>does not</strong> let you specify a custom modified date.</p>
<p>When you’re ready to publish a major content change, you can uncheck this setting before saving the post.</p>
<h4>Customization</h4>
<p>Your theme will need to use <code>get_the_modified_date()</code> to display the modified date.</p>
<p>This plugin only applies to the <code>post</code> post type by default. You can customize which post types it appears on using the <code>limit_modified_date_post_types</code> filter.</p>
<pre><code>add_filter( 'limit_modified_date_post_types', function( $post_types ) {
    $post_types[] = 'page';
    return  $post_types;
});
</code></pre>


Limit Modified Date

Prevent the "modified date" from changing when making minor changes to your content.

Luke Mlsna

<p>Creates the <code>[lastupdated]</code> shortcode to display the date and/or time of the last update to a post or page. If used without any arguments, it will display the date in the format configured in the Settings > General tab. It supports several optional arguments: format, before, and after. These options allow you to change how the date/time is formatted and if anything should appear before or after the date/time is displayed.</p>
<h3>Readme Generator</h3>
<ul>
<li>This plugin’s readme.txt file was generated by the <a href="http://shinraholdings.com/project/readme-gen/" rel="nofollow ugc">bitacre Readme Generator</a> for WordPress Plugins.</li>
</ul>
<h3>Support</h3>
<ul>
<li><a href="http://shinraholdings.com/plugins/last-updated-shortcode" rel="nofollow ugc">Plugin Homepage</a></li>
<li><a href="mailto:plugins@shinraholdings.com" rel="nofollow ugc">plugins@shinraholdings.com</a></li>
</ul>
<h3>Donations</h3>
<p><a href="http://shinraholdings.com/donate" rel="nofollow ugc">Donations</a> are graciously accepted to support the continued development and maintenance of this and other plugins. We currently accept Paypal and kind words.</p>


Last Updated Shortcode

So simple to use.  I install this on every site I create where there are legal pages like: terms of use, privacy policy, etc.

A must have for legal pages, terms of use, etc.

Creates a shortcode to display the date/time when a post/page was last updated (with optional formatting).

Limit Modified Date vs Last Updated Shortcode