private static long GetAbsoluteDateUmAlQura(int year, int month, int day)
{
int yg = 0;
int mg = 0;
int dg = 0;
UmAlQuraCalendar.ConvertHijriToGregorian(year, month, day, ref yg, ref mg, ref dg);
return(GregorianCalendar.GetAbsoluteDate(yg, mg, dg));
}