Enter your Substack publication name and The Mirror will find your last post date automatically.
Have a newsletter? Just type your publication name — the part before .substack.com. For example, if your newsletter is at yourletters.substack.com, enter yourletters.
Not sure of your name? On the web, go to your Substack dashboard and look at the URL in your browser — it'll say yourname.substack.com. On the mobile app, tap your avatar → Settings → Edit Profile → scroll down to see your URL.
No newsletter yet? Skip this and use the date picker below instead — set it to whenever you last published anything, anywhere.