public static boolean isSelectedTimeWithinIntervals(LocalTime selectedTime, List<Interval> intervals) {
        boolean result = false;
        for (Interval interval : intervals) {
            long begin = parseStringLdtToLdt(interval.getDateBegin()).toEpochSecond(ZoneOffset.UTC);
            long end = parseStringLdtToLdt(interval.getDateEnd()).toEpochSecond(ZoneOffset.UTC);

            LocalDate selectedDate = parseStringLdtToLdt(interval.getDateBegin()).toLocalDate();
            LocalDateTime selectedDateTime = LocalDateTime.of(selectedDate, selectedTime);
            long selected = selectedDateTime.toEpochSecond(ZoneOffset.UTC);

            if (begin <= selected && selected <= end) {
                result = true;
                break;
            }
        }
        return result;
    }