Thank you for this information!
I’m glad to see that all of the calendar plugins are up-to-date. Thank you for updating all of those.
It sounds like this is the only issue remaining on your site:
Except, that the display of the Weekdays on small screens is again set to the full name.
Is this indeed the only calendar issue remaining on your site? If so, I can confirm that there is a bug here that we are still working on and are hoping to have fixed in the next maintenance release—which should be released very, very soon.
Thank you for your patience and persistence here!
George