Blogger acquired a new feature to post your posts on a specific day when the day you specified. This is a great feature what I thought earlier. Because, if you have lot of new content to post in your blog, this idea works well to keep the track of visitors regularly. Suppose if you are writing a suspense thriller story posts in your blog per twice in a week. You can post the part of the story in a particular day. And remaining parts will be posted on the day you want to publish. Your visitors waits for the day of your post and they can view new post on correct regular intervals. This new feature of blogger can only be used if you log-in in draft page of blogger. So to experience the schedule posting and other soon to be added features in blogger you must log-in to http://draft.blogger.com instead of http://www.blogger.com.
To do this blow of the post editor you can see "Post Options". Click on it. Then in after a dropdown link you can see "Post date and time". There you need to specify the time of your post to be posted on a specified day.