sparkweb

This plugin lets you edit the custom fields for many posts at once. Designed to work with pages, posts, and all custom post types. The plugin also has some actions included so that plugins and themes can integrate seamlessly and build their own extensions into the functionality.

Custom Field Bulk Editor

This plugin lets you edit the custom fields for many posts at once. Designed to work with pages, posts, and all custom post types.

dahousecatz

Adds a bulk action to all post types to allow setting the publish date to a specific date time.
The bulk action is by default applied to all post types.
The plugin uses input types of date and time to allow users to set the desired publish date / time.
This is a very lightweight plugin as has as little code as possible, and is also designed to be developer friendly 
with alter hooks allowing other plugins to make changes to how this plugin operates.

Bulk edit publish date

Took me hours to find this plugin - this is exactly what I needed, and does the job very nicely.

I had 300 posts that needed to go live at midnight in two weeks, and it would have taken ages to do it the normal Wordpress way, so this plugin enabled me to do it in 5 minutes (including installing the plugin!).

Fantastic Plugin!

Thank you, this plugin works perfectly. Just what I needed.

Works like a charm!

Adds a bulk action to all post types to allow setting the publish date to a specific date time.

Custom Field Bulk Editor vs Bulk edit publish date