The Chinese, Persian, modern Hindu, Coptic, Ethiopic, and Bahai calendars have been added.
All code works properly for dates before the current era.
Takes chronology into the computer age with impressive erudition and elan. It will be of interest not only to mathematicians, but also to historians and laymen. The authors are to be congratulated on a splendid research job. Please forgive me if you receive multiple copies of this message.