Backdating posts
Just because an event has passed doesn’t mean you can write an article about it. When you have finished, it may also make sense to back date the article by adjusting the ‘Post timestamp’. When you change the date of a post to the past it will not show at the top (assuming you have other posts dated after) but it will fill your archives to show your blog cover dates that may be prior to when you actually started the blog.
A good way to do this is by scanning through old emails (you don’t delete them all, do you?) and find some event that occurred in the past and blog about it. Perhaps you were part of a committee that presented a charity drive check to an organization. Write up an article and change the Post timestamp to reflect when the date occurred. Use this within reason, there is no reason to recreate your entire history. But using this feature will allow you to fill your blog with important posts that have already occurred.