This dissertation examines the management of Islamic religion related to the Hijri calendar in Indonesia, Turkey and Morocco. The selection of the three countries was motivated by the absence of studies related to the Hijri Calendar in countries that were quite active in the development of the Hijri calendar discourse. In addition, the relation pattern between religions and different countries between Indonesia, Turkey and Morocco is very possible for differences in the management of the Hijri Calendar which has been in the spotlight, especially before the arrival of the months of Ramadan, Shawwal and Zulhijjah. Also, the use of different religious madhhabs makes the Hijri calendar management model carried out by the government m...