Devtard

This plugin overrides default date and time of edited posts with dynamically calculated custom values. This is useful especially when scheduling posts; the plugin can, for example, automatically generate new post dates by incrementing the current most future post date by a specified number of days.
Calculated custom date and time will automatically replace default values after clicking the “Edit” link next to “Publish immediately” in the post editor’s Publish module.
<h4>Features</h4>
<ul>
<li>Date/time values usable as a reference: current date/time, oldest or most future post date/time; specific time of day</li>
<li>Date/time of reference can be increased or decreased by a specific number of days/minutes</li>
<li>Configurable post types and statuses of analyzed and affected posts</li>
</ul>
See <a href="https://wordpress.org/plugins/automatic-post-date-filler/screenshots/" rel="ugc">Screenshots</a> for more information.

Automatic Post Date Filler

Automatically sets custom date and time when editing posts.

benplum

Presswell

Presswell Publication Schedule adds precise, automated control over how often new posts are published, and is the perfect solution for ensuring a consistent editorial calendar. Simply configure the days and times when posts should be published and new posts will be automatically scheduled for the next available time slot.
Features
<ul>
<li>Automatically schedule posts based on simple day and time rules</li>
<li>Ability to override scheduled date for Admins and Editors</li>
<li>‘Publish Now’ actions for Admins and Editors</li>
</ul>

Presswell Publication Schedule

Simple and precise post publishing control for WordPress based on day of the week and time of day.

Automatic Post Date Filler vs Presswell Publication Schedule