private int leap(int year)
        {
            return year * 365 + (year / 4) - (year / 100) + (year / 400);
        }

        private int zeller(int year, int month, int day)
        {
            year += ((month + 9) / 12) - 1;
            month = (month + 9) % 12;
            return leap(year) + month * 30 + ((6 * month + 5) / 10) + day + 1;
        }

        private int dow(int year, int month, int day)
        {
            return (zeller(year, month, day) % 7) + 1;
        }

        private String getDay()
        {
            String strYear = "" + Cosmos.Hardware.RTC.Century + Cosmos.Hardware.RTC.Year;
            int year = int.Parse(strYear);
            int day = dow(year, Cosmos.Hardware.RTC.Month, Cosmos.Hardware.RTC.DayOfTheMonth);

            switch (day)
            {
                case 1: return "Monday";
                case 2: return "Tuesday";
                case 3: return "Wednesday";
                case 4: return "Thursday";
                case 5: return "Friday";
                case 6: return "Saturday";
                case 7: return "Sunday";
                default: return "";
            }
        }