Re: Y2k compliance

J. S. Connell (
Sun, 6 Dec 1998 11:43:15 -0500 (EST)

On Sat, 5 Dec 1998, Mr. James W. Laferriere wrote:

> Hello Rik, I'm Sorry but 'cal' isn't a document displaying
> a known starndards bodies authorship .
> Also being common knowledge isn't a publication of the standard.
> All I'm asking for is a known definition for the derivation of
> leap year . There has has to be one somewhere .
> Otherwise how did 'cal' get its definition ?

The full text of Inter Gravissimas can be found on the World Wide Web at . Section nine
is, if I'm not mistaken, then one we're all interested in.

(Yes, the Vatican *is* one of the world's oldest standards authorities.)

>From the Y2K FAQ:

> 4.2 Is there an ISO, ANSI, NIST, or other standard that defines the
> Gregorian calendar or the rules for leap year?
> No. There is no ISO, ANSI, NIST, or any other official standard, in the
> modern sense, for the Gregorian calendar. The Gregorian calendar was
> defined by the Roman Catholic Church, not by any modern
> standards-setting organization. The definition was established in 1582,
> long before today's standards organizations even existed.
> In 1582 the Church was the only organization in a position to establish
> anything resembling an international standard. The original and
> ultimate source for the definition of the Gregorian calendar is the
> papal bull "Inter gravissimas" (In the gravest concern) issued by Pope
> Gregory XIII in 1582.
> The legal basis for the Gregorian calendar in Great Britain and its
> former colonies is "An Act for regulating the commencement of the Year,
> and for correcting the Calendar now in use" passed by Parliament and
> approved by King George II in 1751. This act, of course, merely copies
> what had already been defined by the Church 169 years earlier.


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