Whenever I set a blog to publish on a certain date it never publishes on that date. There are no errors in the activity log or anything, it simply doesn't publish. Any idea why this might be?

Okay, so first, have you actually done anything that would make it work? Scheduled posts are triggered either by a cron job pointed at the run-periodic-tasks script or by loading your blog's activity feed. And if you do have a cron job set up, are you sure it's working correctly?

Well I'm not sure... All I know is that when I create a new entry I choose "Scheduled" from the drop down box and then I choose the time and date I want it to post the blog and when that time rolls around it never publishes it.

Is there something else I have to set up in order for it to post when I want it to?

http://www.learningmovabletype.com/a/000757scheduled_posts/

It's old, but none of the really important information's changed. Ignore the extra links at the bottom, though.

Thank you! You're always a big help! That link solved the problem!