The word Taqwim refers to a calendar, schedule, or timetable, which suggests that this book may contain Islamic dates, prayer times, important Islamic events, and guidelines for religious observance.
It is likely designed to help Muslims organize their daily prayers, fasting schedules, and religious activities according to the Hijri (Islamic) calendar. The book may also include information on Islamic months, significant historical events, Sunnah practices, and recommended acts of worship.