code: def exam_reliability_by_datetime(
          datetime_axis, datetime_new_axis, reliable_distance):
      
      numeric_datetime_axis = [
          totimestamp(a_datetime) for a_datetime in datetime_axis
      ]
  
      numeric_datetime_new_axis = [
          totimestamp(a_datetime) for a_datetime in datetime_new_axis
      ]
  
      return exam_reliability(numeric_datetime_axis, numeric_datetime_new_axis,
                              reliable_distance, precision=0)
docs: A datetime-version that takes datetime object list as x_axis
      reliable_distance equals to the time difference in seconds.