Conversion of Islamic and Christian Dates, calendar conversion tool created by Johannes Thomann for the Institute of Oriental Studies at Zurich University, 1996-2010. The enlarged version comprised the Coptic, Persian (Era of Yazdigird), Islamic lunar (AH), and Ottoman māliyyah calendars, but since Fall 2013 the page with these conversion tools is not any longer available at: http://www.ori.uzh.ch/services/calendar.html. Unfortunately the snap shots preserved through the Wayback Machine of the Internet Archive merely document its contents. The Middle East Librarians Association (MELA) keeps the Islamic calendar conversion tool on its website at: http://www.mela.us/hegira.html
Dershowitz, Nachum, and Edward M. Reingold. Calendrical Calculations. 3rd ed. Cambridge: Cambridge University Press, 2008.
Grumel, Venance. La chronologie. Paris: Presses universitaires de France, 1958. Reference work for the chronology of Arab Christian churches.
Mondschein, Kenneth C. On Time: A History of Western Timekeeping. Baltimore, Md.: John Hopkins University Press, 2020.
Dagmar A. Riedel
Last updated, 22 September 2020