Blogger have added a very exciting feature called Scheduled Post Publishing. I have often wanted to set up a post to be published later, even tested to see if it would work, but so far to no avail. Apparently I wasn't the only one and Blogger are now testing this new feature.
If everything goes right, this post should appear this night at 4AM, while I am asleep.
Note: You have to be logged on to Blogger in draft to do it.