To change the date in a post, click on the edit button to the right of the post’s headline. (If you don’t see an edit button, log into WordPress by adding /wp-admin to the end of your site’s URL, e.g., then using your network credentials.) In the “Publish” panel in the right sidebar, click on the edit button below the “Published on” date. You can change the date to any time in the past, present or future. Then choose “Update.”