private static double hCalendarToJD(int yh, int mh, int dh) {
	        /*
	           Estimating The JD for hijrah dates
	           this is an approximate JD for the given hijrah date
	         */
	        double md, yd;
	        md = (mh - 1.0) * 29.530589;
	        yd = (yh - 1.0) * 354.367068 + md + dh - 1.0;
	        yd = yd + 1948439.0;
	        return yd;
	    }