Writing your post
Write your post in Ghost app or by visiting: https://www.haswellministries.com/ghost
Schedule posts for 5am on the day you want the post to be sent. Mailchimp checks at 6am each morning to see if there are new posts to send, if there are new posts, it will send to the full list, if not, it won't send anything.
Facebook / Twitter
After your post automatically publishes to your website, an update will be sent on Facebook and twitter to alert your followers that there is a new post.