int month = 9;
            int year = 2014;
            int day = 23;

            var n1 = Math.Floor((double)(275 * month /9));
            var n2 = Math.Floor(((double)(month + 9) / 12));
            var n3 = (1 + Math.Floor((double) (year/4) + 2)/3);
            var n = n1 - (n2*n3) + day - 30;

            var lngHour = 6.0944400/15;
            var t1 = n + ((6 - lngHour)/24);
            var t2 = n + ((18 - lngHour)/24);

            var m1 = (0.9856*t1) - 3.289;
            var m2 = (0.9856*t2) - 3.289;

            var L = m1 + (1.916*Math.Sin(m1*Math.PI/180)) + (0.020*Math.Sin(2*m1)) + 282.634;