Abstract

this paper is to present, in a completely algorithmic form, a description of five basic calendars and how they relate to one another: the present civil calendar (Gregorian), the recent ISO commercial calendar, the old civil calendar (Julian), the Islamic (Moslem) calendar, and the Hebrew (Jewish) calendar. Information that is sufficiently detailed to allow computer implementation is difficult to find for the Islamic and Hebrew calendars since the published material is often inaccessible, ecclesiastically oriented, incomplete, inaccurate, based on extensive tables, overburdened with extraneous material, focused on shortcuts for hand calculation to 0038--0644/90/090899--30$15.00 Received 31 August 1989 c fl 1990 by John Wiley & Sons, Ltd. Revised 27 March 1990 avoid complicated arithmetic or to check results, or difficult to find in English. Most existing computer programs are proprietary, incomplete, or inaccurate

Citations