Public static hourCount TimeCalcHr(DateTime StartTime, Datetime EndTime)
    {
        hourCount hours = new hourCount();
        //everything is in minutes
        integer morningMinutes = 0;
        integer eveningMinutes = 0;

        integer startMinutes = StartTime.Hour() * 60 + StartTime.Minute();
        integer endMinutes = EndTime.Hour() * 60 + EndTime.Minute();
        integer wholeDays = startTime.date().daysBetween(EndTime.date());
    bool spansDays = false;
        if (wholeDays > 0){
        wholeDays --;
        spansDays = true;
    }
        startMinutes = wholeDays * 12 * 60;
        endMinutes = wholeDays * 12 * 60;

        if(startMinutes < 360) //minutes in the first half of the day
        {
            morningMinutes += math.MIN(endMinutes,360) - startMinutes;
        }
        else
        {
        eveningMinutes += math.MIN(endMinutes,1440) - startMinutes;
        }
        if(endMinutes > 360 && (startMinutes < 360 || spansDays) )
        {
        eveningMinutes += endMinutes - 360;
        if(spansDays)
            morningMinutes += 360;
        }
        else
        {
        morningMinutes += endMinutes;
        }
        hours.nightHours = math.ceil(eveningMinutes / 60);
        hours.dayHours = math.ceil(morningMinutes / 60);
        return hours;
    }