lib/hijri_umm_alqura.rb
def jd(date = self)
      index = (12 * (date.year - 1)) + date.month - 16260
      mcjdn = date.day + HijriUmmAlqura::UMMALQURA_DAT[index - 1] - 1
      mcjdn = mcjdn + 2400000 - 0.5
      return mcjdn
    end
def jd(date = self)
      index = (12 * (date.year - 1)) + date.month - 16260
      mcjdn = date.day + HijriUmmAlqura::UMMALQURA_DAT[index - 1] - 1
      mcjdn = mcjdn + 2400000 - 0.5
      return mcjdn
    end
Hijri to julian