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Continue to ChatA Comparative Study of Ottoman Perpetual Calendars: Şeyh Vefâ’s Rûznâme and its copies - https://avesis.istanbul.edu.tr/yayin/9e6ed1bc-fcc0-4e11-923b-3a78f416cd61/a-comparative-study-of-ottoman-perpetual-calendars-seyh-vefas-ruzname-and-its-copies