'Publish Date' enables you to create pages in advance and set them live at a designated date in the future.
Put simply, 'Publish Date' automatically turns your 'Draft' pages to 'Live' on a set date.
The script starts at 12:00 am, you can, therefore, expect your page live at 12:05 am.
Use this feature in instances where your content has been approved in advance and is ready to publish. Scenarios for use include: