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bug#20583: calendar-absolute-from-gregorian

From: Glenn Morris
Subject: bug#20583: calendar-absolute-from-gregorian
Date: Fri, 15 May 2015 20:54:04 -0400
User-agent: Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/)

Nicholas Strauss wrote:

> Why does (calendar-absolute-from-gregorian '(10 10 1582))
> return 577731?
> (calendar-generate '(10 1582)) is another example of this
> error.

It's behaving as designed. It's a utility function that operates on the
basis that today's calendar system is valid for all time. It's not meant
as literally historically accurate, and I think trying to make it so (by
introducing discontinuities at certain dates) would be a mistake. See eg
thread at:


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