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bug#20583: calendar-absolute-from-gregorian

From: Nicholas Strauss
Subject: bug#20583: calendar-absolute-from-gregorian
Date: Sun, 24 May 2015 08:29:22 -0700

Corrected comments to calendar-julianday-from-proleptic-gregorian
and cond for year 1582.
File requires calendar.el


On Fri, May 22, 2015 at 8:36 AM, Nicholas Strauss
<address@hidden> wrote:
> There are other day number systems more common than the  emacs
> "absolute" day number --
> the "astro" or Julian day number and the proleptic Gregorian system
> used by sqlite3
> e.g. select julianday("-4713-11-24").
> cal-julian.el:alendar-astro-to-absolute refers to  "astro".
> Proleptic Gregorian day 0 = November 24, 4714 BC while "astro" day 0 =
>  January 1, 4713 BC.
> I'm attaching julian.lisp which has calendar-correlate-from-date and
> calendar-correlate-from-julianday
> may help with days before 1582. These are based on Peter
> Duffett-Smiths calculations.

Attachment: julian.lisp
Description: Binary data

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