[iPhone] Gregorian > Julian Date
+ ( float )solarToJulianCalendar:( int )Year setMonth:( int )Month setDay:( int )Day { float JD, a, y, m; a = floor ((( 14 - Month) / 12 )); y = Year + 4800 - a; m = Month + ( 12 * a) - 3 ; JD = Day + floor ((( 153 * m) + 2 ) / 5 ) + ( 365 * y) + floor (y / 4 ) - floor (y / 100 ) + floor (y / 400 ) - 32045 ; return JD; }