Write and publish a post
Draft in the editor, then publish now or schedule.
Open Posts and create a new post. It stays a draft until you publish it.
Select Publish when the post is ready. It goes live on your blog right away. To publish later, open the menu next to the button, choose Schedule…, and pick a date and time. After you publish, the button reads Update, and the same menu lets you Unpublish the post.