System.Globalization.UmAlQuraCalendar.GetDayOfWeek C# (CSharp) Method

        public override DayOfWeek GetDayOfWeek(DateTime time) {
            return ((DayOfWeek)((int)(time.Ticks / TicksPerDay + 1) % 7));
        }

        public int GetDayNumber(int Day)
        {
            try
            {
                switch (UmAlQuraInstance.GetDayOfWeek(new System.DateTime(m_selectedYear, m_selectedMonth, Day, UmAlQuraInstance)))
                {
                case DayOfWeek.Saturday:
                    return(0);

                case DayOfWeek.Sunday:
                    return(1);

                case DayOfWeek.Monday:
                    return(2);

                case DayOfWeek.Tuesday:
                    return(3);

                case DayOfWeek.Wednesday:
                    return(4);

                case DayOfWeek.Thursday:
                    return(5);

                case DayOfWeek.Friday:
                    return(6);
                }
            }
            catch (ArgumentException exception)
            {
                MessageBox.Show(exception.Message);
            }
            return(0);
        }