Hebrew & Jewish Studies


Diversity and Unity in Ancient and Medieval Calendars

Calendars in Antiquity and the Middle Ages: Workshop 1, 18 February 2014

The theme of our first workshop, Diversity and unity in ancient and medieval calendars, captures the ERC Calendars project as a whole. It is closely related to the main research questions of the project: how ancient and medieval calendars evolved, through processes of standardization and fixation, from diversity to unity.

Contributions to this workshop include a broad range of periods and calendars, from the Roman Empire to medieval Islamic, Christian, and Jewish calendars.

Tel Fara Plaque, Courtesy of UCL Institute of Archaeology


Sacha Stern, UCL: Diversity and unity in ancient and medieval calendars: a macro-historical perspective

Leah Di Segni, Hebrew University of Jerusalem: Chronological systems in late antique Palaestina and Arabia

Johannes Thomann, University of Zurich: Arabic quittances, contracts, almanacs and ephemerides: documentary sources on the use of calendars in the medieval Islamic world

François de Blois, UCL: Polemics about the beginning and the end of Ramadan in Islamic astronomical and theological works

Leofranc Holford-Strevens,  Oxford University Press: Medieval Liturgical Calendars in Catholic Europe

Ilana Wartenberg, UCL: The Jewish calendar in Isaac Israeli's Yesod Olam

The workshop runs as part of the ERC funded research project Calendars in Late Antiquity and the Middle Ages: Standardization and Fixation

Download the Workshop Poster (opens PDF in a new window)