Which calendar was introduced by famous astronomer Omar Khayyam?

🧠 Explanation:

Omar Khayyam introduced the Jalali calendar, a solar calendar with high accuracy, used in Persia from the 11th century. Its precision improved agricultural and religious scheduling, influencing regional timekeeping. Understanding its development is key to studying astronomical history, as it reflects advanced mathematical knowledge. The Jalali calendar’s legacy persists in modern Iranian and Afghan calendars, impacting cultural and scientific heritage. Khayyam’s work as a polymath underscores the interplay of astronomy, mathematics, and culture, shaping time management practices in the Islamic world and beyond for centuries.