5192faf047
reviewed by brad@ -- This package consists of a C library and a Perl module (which uses the C library, internally) for all kinds of date calculations based on the Gregorian calendar (the one used in all western countries today), thereby complying with all relevant norms and standards: ISO/R 2015-1971, DIN 1355 and, to some extent, ISO 8601 (where applicable).
29 lines
1.4 KiB
Plaintext
29 lines
1.4 KiB
Plaintext
This package consists of a C library and a Perl module (which uses
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the C library, internally) for all kinds of date calculations based
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on the Gregorian calendar (the one used in all western countries
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today), thereby complying with all relevant norms and standards:
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ISO/R 2015-1971, DIN 1355 and, to some extent, ISO 8601 (where
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applicable).
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(See also http://www.engelschall.com/u/sb/download/Date-Calc/DIN1355/
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for a scan of part of the "DIN 1355" document (in German)).
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The module of course handles year numbers of 2000 and above correctly
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("Year 2000" or "Y2K" compliance) -- actually all year numbers from
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1 to the largest positive integer representable on your system
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(which is at least 32767) can be dealt with.
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Note that this package projects the Gregorian calendar back until
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the year 1 A.D. -- even though the Gregorian calendar was only
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adopted in 1582 by most (not all) European countries, in obedience
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to the corresponding decree of catholic pope Gregor I in that year.
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Some (mainly protestant) countries continued to use the Julian
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calendar (used until then) until as late as the beginning of the
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20th century.
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Finally, note that this package is not intended to do everything
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you could ever imagine automagically for you; it is rather intended
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to serve as a toolbox (in the best of UNIX spirit and traditions)
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which should, however, always get you where you want to go.
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