Website content should be updated often. Weekly or monthly works well. Search engines want to find new content, but so do those who are looking at the website. Sometimes it's easy, since there's a sermon every week. Other times, it might take some effort to remember when there's announcements, calendars, newsletters, and Facebook to maintain.
This website is set up with a list format for articles. That's because those old featured events should be archived into the list, not deleted once the blog page gets to be too long.