Scribd
Upload
47 views1 page

Calendrical Calculations: Topics

This document provides an overview of the book "Calendrical Calculations" which discusses algorithms for converting between different calendar systems. It was written by computer scientists and first published in 1997, with subsequent editions in 2001, 2008, and 2018. The book covers 14 different calendars in its first edition such as the Gregorian, Julian, Islamic, and Chinese calendars. Later editions expanded the coverage to include more calendars.

Uploaded by

Eu Amanã
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as ODT, PDF, TXT or read online on Scribd
47 views1 page

Calendrical Calculations: Topics

This document provides an overview of the book "Calendrical Calculations" which discusses algorithms for converting between different calendar systems. It was written by computer scientists and first published in 1997, with subsequent editions in 2001, 2008, and 2018. The book covers 14 different calendars in its first edition such as the Gregorian, Julian, Islamic, and Chinese calendars. Later editions expanded the coverage to include more calendars.

Uploaded by

Eu Amanã
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as ODT, PDF, TXT or read online on Scribd
You are on page 1/ 1

Calendrical Calculations

From Wikipedia, the free encyclopedia

Calendrical Calculations is a book on calendar systems and algorithms for computers to convert


between them. It was written by computer scientists Nachum Dershowitz and Edward Reingold and
published in 1997 by the Cambridge University Press. A second "millennium" edition with a CD-
ROM of software was published in 2001, a third edition in 2008, and a fourth "ultimate" edition in
2018.

Contents

• 1 Topics

• 2 Audience and reception

• 3 References

• 4 External links

Topics[edit]
There have been many different calendars in different societies, and there is
much difficulty in converting between them, largely because of the
Jimpossibility of reconciling the irrational ratios of the daily, monthly, and yearly
uastronomical cycle lengths using integers.[1] The 14 calendars discussed in the
first
m edition of the book included the Gregorian calendar, ISO week date, Julian
calendar, Coptic
p calendar, Ethiopian calendar, Islamic calendar, modern Iranian
calendar, Baháʼí calendar, French Republican calendar, old and modern Hindu
J
calendars, Maya calendar, and modern Chinese calendar.[1][2] Later editions
utexpanded it to many more calendars.[3][4][5] They are divided into two groups:
o"arithmetical" calendars, whose calculations can be performed purely
m
pmathematically, independently from the positions of the moon and sun, and
n"astronomical" calendars, based in part on those positions.[6]
ta
ov
i
sg
ea
at
ri
co
hn

You might also like