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Nor is this the end of the difficulties. The structural problem has consequences for leap year counts, as well. The first leap year was 1090, which commenced with 1 March 1679 (Julian). Every fourth year thereafter contained the intercalary day. The year 1121, however, was suppressed, so the leap year following 1118 was not 1122, but 1123. The leap year rule, then, is forced to stutter and restart a new four-year cycle every 30-something years. Because the suppression of years did not follow a regular rule, the leap year cannot be fixed by rule, either. |
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The inadequacies of this calendar eventually caused the government to promulgate a New Financial Calendar, which was used until the end of the Ottoman empire early in the 20th century. |
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The New Calendar commenced with the year 1256, corresponding to 1 March 1840 (Julian), or A.D. 13 March 1840 (Gregorian). The Julian calendar was retained, but the numbers representing certain years were no longer suppressed, resulting in a sequential and consecutive year count. In effect, the Hegira epoch was retained, but the Islamic year length was eliminated. The consequence of this decision, of course, was a separation of the New Calendar year count from the Islamic Hegira epoch year count. By the year A.D. 1900, the two calendars had diverged by two years. The Islamic year 1318 commenced on 18 April 1900 (Julian), or 1 May 1900 (Gregorian), while the New Calendar commenced with 1 March 1900 (Julian), or 14 March 1900 (Gregorian) with a year number of 1316. |
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There is a lesson to be learned from this calendar. It is possible to serve more than one calendric master, but only at the cost of complexity, and only if an attempt is made to reconcile any logical incompatibilities between them. |
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See the SCDTL text on the CD for the discussion of the code for the Islamic calendar. |
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The traditional calendar used for religious purposes by Jews is known as the Jewish calendar, or alternately as the Hebrew calendar. The term Jewish is the more common and is the one used by the SCDTL system for this calendar. |
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In countries outside of Israel, Jews typically use the local civil calendar for daily affairs and the Jewish calendar for religious observances and commemorative events, such as yahrzeit, which are connected to their religion. The calculations for these events must be performed using the Jewish calendar, while the days of observance are typically scheduled in the local civil calendar. There is thus a constant need for conversion between the Jewish calendar and local civil calendars. |
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