To schedule a post:
1. Write your post.
2. Proofread it.
3. Click on Save Now.
4. Click on Post Options (located at the bottom of the 'edit post' page. Circled in blue below.)
6. Click Publish Post.
5. Enter in the time and date that you would like your post published (circled in red above).
7. Check that your post is set to be scheduled at the right time and date.
8. Your post will publish automatically at that date and time. Too cool!
You can also change the dates of old posts, too.
Happy Blogging! :)