code: def _is_valid_date_time(self, inpt, metadata):
          
          # NEED TO ADD CHECKS FOR OTHER METADATA, LIKE MINIMUM, MAXIMUM, ETC.
          from dlkit.abstract_osid.calendaring.primitives import DateTime as abc_datetime
          if isinstance(inpt, abc_datetime):
              return True
          else:
              return False
docs: Checks if input is a valid DateTime object