Wikipedia, the free encyclopedia The Hijri calendar, also known as the Muslim calendar or Islamic calendar , ( Arabic : التقويم الهجري ‎; at-taqwīm al-hijrī; Persian : تقویم هجری قمری ‎ taqvim-e hejri-ye qamari; Turkish : Hicri Takvim ; Urdu : اسلامی تقویم Islami taqwīm; Indonesian : Kalender Hijriah; Malay :