أنظمة التقويم وحساب السنين

شرح مبسط لتطور أهم نظم التقويم المؤثرة في التاريخ وخلفياتها التاريخية والتعديلات التي مرت بها على مر العصور. المراجع: Clagett, Marshall. Ancient Egyptian Science: Calendars, clocks, and astronomy 310,311 Kwok, Sun. Our Place in the Universe: Understanding Fundamental Astronomy from Ancient 84 Keightley, Thomas. History of the Roman Empire, from the accession of Augustus to the end of the empire of the West: being a continuation of the History of Rome. El Guindi, Fadwa. By Noon Prayer: The Rhythm of Islam, 82 Brind'Amour, Pierre (1983). Le Calendrier romain: Recherches chronologiques. Ottawa University Press. Rüpke, Jörg (2011). The Roman Calendar from Numa to Constantine: Time, History and the Fasti. Wiley. Borkowski, K. M., (1991). "The tropical calendar and solar year", J. Royal Astronomical Soc. of Canada 85(3): 121–130. Bishoy K. R. Dawood, The Coptic Calendar. Parker, Richard Anthony (1950), The Calendars of Ancient Egypt, Studies in Ancient Oriental Civilization, No. 26, Chicago: University of Chicago Press.

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