You can edit all articles in your Authory account anytime. Here is how:
Log in to your Authory account
Click on the headline of the article you want to edit. You'll be forwarded to the article full text view.
On the right side above the headline you'll find an "Edit article" button.
Click the "Edit" button and you'll switch to the "Editing mode". Now you can make changes to the article content and publishing date.
+++ Please note that the edit icon is only visible on Desktop, not on your mobile devices (e.g. smartphone, tablet).