Article ID: CBB349474811

Non-Rabbanite Jewish Calendars in the Works of Jacob al-Qirqisānī and Saadia Gaon (2021)

unapi

The correct way of setting the calendar was a matter of much debate among medieval Jews. While it is well-known that medieval Rabbanite and Qaraite communities practiced different calendars, the Jewish calendar landscape of the ninthtenth centuries appears to have been much more diverse. Medieval sources suggest that Jewish groups in that period used calendars based on a variety of principles including observation, different calculations, and a combination of observation and calculation. No in-depth examination exists of medieval alternatives to the Rabbanite calendar. This article is a study of non-Rabbanite medieval Jewish calendars described in tenth-century Babylonian works the Kitāb al-Tamyīz and the Commentary on Genesis by Saadia Gaon, and Kitāb al-Anwār wal-Marāqib by Jacob al-Qirqisānī. In addition to analysing the calendation methods described in the sources, I assess the trustworthiness of Saadia and al-Qirqisānī’s reports and suggest that they reflect real calendars of the period with some degree of accuracy.

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Authors & Contributors
Eade, J. C.
Gislén, Lars
Aveni, Anthony F.
Biesterfeldt, Hans Hinrich
Bohak, Gideon
Calvo, Emilia
Journals
Aleph: Historical Studies in Science and Judaism
Journal of Astronomical History and Heritage
Archive for History of Exact Sciences
MHNH (Revista Internacional de Investigación sobre Magia y Astrología Antiguas)
Suhayl: Journal for the History of the Exact and Natural Sciences in Islamic Civilisation
Ta-lu ts'a-chih
Publishers
Cambridge University Press
de Gruyter
Franz Steiner Verlag
M.E. Sharpe, Inc.
University of Pennsylvania Press
University of Texas Press
Concepts
Science and religion
Calendars
Time measurement
Judaism
Astronomy
Astrology
People
Sa'adia ben Joseph
Isidore of Seville
Philoponos, Joannes Grammaticus
Steinschneider, Moritz
Profayt Duran
Time Periods
Medieval
Ancient
Renaissance
Early modern
11th century
14th century
Places
Southeast Asia
Israel
Mexico
Ottoman Empire
China
Europe
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