Giorgos Sarigiannidis

Time Lord is a plugin which allows you to schedule the publication of part of your content on a set date. It can also calculate age based on a set year in the past or the estimated time if the year is set in the future.
You can use it in posts, pages or any other content type via the <code>[timelord]</code> shordcode. Here are some common examples, supposing that present day is on April 2015:
<ul>
<li><code>[timelord from="2016-01"]SOME CONTENT[/timelord]</code> would output “SOME CONTENT” only when January 2016 comes. </li>
<li><code>[timelord to="2016-01"]SOME CONTENT[/timelord]</code> would output “SOME CONTENT” until January 2016 and then it would remove it. </li>
<li><code>[timelord from="2015-04-01" to="2016-04-01" every="1 day"]SOME CONTENT[/timelord]</code> would output “SOME CONTENT” every other day until April 2016. </li>
<li><code>[timelord from="2015-04-01" to="2016-04-01" every="Monday"]SOME CONTENT[/timelord]</code> would output “SOME CONTENT” every Monday until April 2016. </li>
<li><code>[timelord to="2014-01" del="yes"]SOME CONTENT[/timelord]</code> would output <code><del>SOME CONTENT</del></code> (check screenshot for an example of what the user would actually see in the frontend). </li>
<li><code>[timelord from="2015-01" to="2016-01"]SOME CONTENT[/timelord]</code> would output “SOME CONTENT” from January 2015 to January 2016.</li>
<li><code>[timelord mode="hide" from="2015-01" to="2016-01"]SOME CONTENT[/timelord]</code> would output “SOME CONTENT” every other time except from January 2015 to January 2016.</li>
<li><code>[timelord year="1980"]</code> would output “35”.</li>
<li><code>[timelord year="1980" ordinal="yes"]</code> would output “35th”.</li>
</ul>
<a href="http://demos.gsarigiannidis.gr/time-lord/" title="Time Lord Demo" rel="nofollow ugc">View the demo</a>
<h4>Features</h4>
<ul>
<li>Allows you to show or hide content at a given timeframe.</li>
<li>Supports recurring display of the output at given intervals (e.g. every hour, every day, every month etc.).</li>
<li>Allows you to wrap your content in the <code><del></del></code> tag instead of removing it when expires. </li>
<li>It can display an alternate message when the actual content is not supposed to be shown. </li>
<li>It can output the time remaining until the content will be up or down. </li>
<li>It can calculate age and even output it with an ordinal suffix. </li>
<li>You can use it anywhere a shortcode would go. On posts, pages, custom posts. </li>
<li>You can add as many shortcodes as you like in a single post.</li>
</ul>

Time Lord

Make modifications on your content based on time parameters. Show or hide part of a post at a given point in the future, calculate age and more.

Bill Erickson

Warning This plugin is no longer supported, and does not always work with the Gutenberg block editor.
I recommend using <a href="https://wordpress.org/plugins/change-last-modified-date/" rel="ugc">Change Last Modified Date</a> instead.
<h4>Summary</h4>
Prevent the modified date from changing when making minor changes to your content.
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.
Minor changes like adding tags or fixing typos won’t bump the modified date.
This plugin will maintain the previous modified date. It does not let you specify a custom modified date.
When you’re ready to publish a major content change, you can uncheck this setting before saving the post.
<h4>Customization</h4>
Your theme will need to use <code>get_the_modified_date()</code> to display the modified date.
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.
<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.

Time Lord vs Limit Modified Date