province Currency unit: 1 Manat = 100 gapiks National holiday: May 28, Independence Day National anthem: Azarbayjan vatanimizsan (Azerbaijan, Our Homeland) Azerbaijan or Azarbeijan ( Azerbaijani : Azerbaycan, Azerbeycan) is historically and geographically Eurasian and stretches from the Caucasus region, which is adjacent to the Caspian Sea , to northwestern Iran