Al-Qirqisānī’s account of historical Jewish calendars and its dependence on the commentary on Genesis by Saʿadya Gaon: a study of Kitāb al-Anwār VII.1.

In her article, Nadia Vidro quotes an unknown passage from the Karaite halakhic treatise of Jacob al-Qirqasānī (d. 927) that is missing in Nemoy edition. The section deals with methods calculating Hebrew calendar used by various Jewish sects throughout history. According to author, this related R. Saʿadya Gaon’s “Book Distinction” (Kitāb al-tamyīz) and includes entire passages his commentary on Genesis. article provides part edition, as well a critical edition English translation excerpt calendars streams Judaism.