Persian Calendar oleh Kaia Stonebrook

The book "Persian Calendar" explores the rich history and scientific accuracy of the Iranian or Persian calendar, a solar-based timekeeping system renowned for its precision. This calendar, deeply rooted in ancient Persia, showcases a remarkable blend of astronomy, history, and cultural practices. Developed through centuries of meticulous observation by Persian astronomers and mathematicians, it stands as a testament to humanity's quest to measure time accurately. Intriguingly, the calendar's accuracy is so refined that it requires precise leap year adjustments determined by the vernal equinox. The book traces the calendar's evolution from its ancient origins to its modern-day usage in Iran and Afghanistan, emphasizing its cultural significance in agriculture, religious observances, and national identity.

Chapters delve into the fundamental concepts of solar calendars, the historical reformations, and the mathematical underpinnings that ensure its accuracy. By combining rigorous scientific analysis with historical and cultural context, "Persian Calendar" offers a unique perspective on this enduring timekeeping system. It demonstrates how the calendar's precise calculations can inform modern fields requiring accuracy and long-term planning.