Currently if you use a Notes date/time control on a form in the client, the control field still has the small calendar button on the right when it's in Read mode (see attached screenshot).
This has never made sense to me, because you can't change the date in Read mode, and it's visually distracting on the form. As a result, I'm constantly using hide-whens and computed fields to make the date display as plain text in Read mode.
Ideally, the date control would just display as plain text BY DEFAULT in Read mode, per the attached screenshot. I think it makes much more sense that way.