code: public void checkForTimeAndDate(final ZonedDateTime DATE_TIME) {
          if (days.contains(DATE_TIME.getDayOfWeek())) { checkForTime(DATE_TIME.toLocalTime()); }
      }
docs: Checks if the section days contains the day of week of the given ZonedDateTime
  object and if the section contains the time itself. With this one can react if
  a time "enters"/"leaves" a section.
  @param DATE_TIME