Cairo Genizah : Calendrical 

Cairo Genizah

<p style='text-align: justify;'>Calendar for 4929-4932 of the Era of Creation (=1168-1169 to 1071-1072 CE). The calendar gives correspondences with years (5)63-(5)66 of the Hijra, which is not entirely accurate, as the relevant Jewish years began at the very end of these Hijra years. This is indicated in 4929 of the Era of Creation, where the corresponding month is given as the last Muslim month Ḏū al-Ḥijja, but not in other years, where the corresponding months are given as the first Muslim month, Muḥarram. The calendar gives the calendrical type of each year as well as days of the week of beginnings of months, festivals and fasts.</p>