If you have a Date Time field and check “required” it’s basically changing nothing. The “required” warning isn’t showing at any time…
Because this field is always set with a valid date, it’s possible that a user ignores this field without even noticing. This is especially important for appointment booking or calculators.
It is possible to preset the field to be empty, but there’s still a value set and therefore, the “required” message never appears.
Is there any option to display the “required” warning if the user doesn’t change or confirm it’s value?
btw. I noticed a small typo within Date Time field:  Disable KEBOARD on mobiles