Either the form validation should not allow it to be saved (e.g. "Please specify time!") or the view should configure a default time (e.g. "midnight"). That's because if we don't do one or the other someone can set a date and still see "not set" in the UI (which is not true, the date is set without time):
When a date is set without time:
Either the form validation should not allow it to be saved (e.g. "Please specify time!") or the view should configure a default time (e.g. "midnight"). That's because if we don't do one or the other someone can set a date and still see "not set" in the UI (which is not true, the date is set without time):