This manuscript is a copy of the perpetual calendar traditionally known as the Ruzname ("almanac") of Şeyh Vefa. It is comprised mainly of tables for calendar conversion with instructions in Ottoman Turkish (in Arabic script). The volume contains eight coloured discs, one of which marks the qibla, or the direction towards the Kaaba in the Sacred Mosque in Mecca (pictured at the centre of the disc). Two of the other discs are volvelles, i.e., rotating paper wheel charts used to make calculations or predictions.

Besides the calendar, which gives times for the five daily prayers of Islam for each month of the year, the manuscript also includes an Arabic prayer and, in the margins, astrological notes on lucky days. The scribe of this manuscript follows tradition in attributing the almanac to Şeyh Vefa (or Sheikh Wafa), a mystic who worked in the Muayyad Mosque in Cairo and died in 1471. Modern scholarship, however, identifies the author as the 9th-century Persian mathematician and astronomer Abū al-Wafā Būzhjānī. Internal evidence suggests that the manuscript dates from ca 1680 C.E. but the exact place of publication in unkown.