The date in stipid US standard (mm/dd/yyyy) will confuse the hell of the rest of the world. Please use not US-centric ISO date format: yyyy-mm-dd.
<input type="date" placeholder="YYYY-MM-DD" class="input" required>Expires: Tue, 16 Mar 2021 05:09 -0400
Maybe slow down, read the spec, and proofread your comment for obvious errors before trying to troll for no reason.
If this is intended to be some kind of standard, it should follow other standards. I understand that this is "only" in the generator, but why even there?
I am French and my Chrome is set to US English. I just opened a FF session, switched to French and the input is dd/mm/yyyy.
I like that the spec uses a universal and unambiguous format. I especially like that this generator is localised to my region though.