Calendrical Calculations, Edition: 3ed. by Dershowitz N., Reingold E.M.

By Dershowitz N., Reingold E.M.

A worthy source for operating programmers, in addition to a fount of invaluable algorithmic instruments for machine scientists, this new version of the preferred calendars ebook expands the therapy of the former version to new calendar variations: universal cyclical calendars and astronomical lunar calendars in addition to the Korean, Vietnamese, Aztec, and Tibetan calendars. The authors body the calendars of the area in a totally algorithmic shape, permitting effortless conversion between those calendars and the choice of secular and non secular vacations. LISP code for the entire algorithms can be found on the internet

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Xxix Except as expressly set forth above, Authors and Publisher: (a) make no other warranties with respect to the material and expressly disclaim any others; (b) do not warrant that the functions contained in the code will meet your requirements or that their operation shall be uninterrupted or error free; (c) license this material on an “as is” basis, and the entire risk as to the quality, accuracy, and performance herein is yours should the code or functions prove defective (except as expressly warranted herein).

The Gregorian calendar, however, uses an uneven distribution of leap years but a relatively easy-to-remember rule (see Chapter 2). The modified French Revolutionary calendar (Chapter 16) included an even more accurate but uneven rule. Most lunar calendars incorporate the notion of a year. Purely lunar calendars may approximate the solar year with 12 lunar months (as does the Islamic), though this is about 11 days short of the astronomical year. Lunisolar calendars invariably alternate 12- and 13-month years, according either to some fixed rule (as in the Hebrew calendar) or to an astronomically determined pattern (Chinese and modern Hindu).

Julian day number 2,431,772 (at noon). • Modified julian day number 31,771. • Month 7, day 10, 2694, on the ancient Egyptian calendar. • Tr¯e 5, 1395, on the Armenian calendar. • Day 1 of week 46 of year 1945, on the ISO calendar. • Ath¯or 3, 1662, Era of the Martyrs, on the Coptic calendar (until sunset). • H – ed¯ar 3, 1938, on the Ethiopic calendar (until sunset). ijja 6, 1364, on the arithmetic and observational Islamic calendars (until sunset). • Kislev 7, 5706, on the Hebrew calendar (until sunset).

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