On Sat, 14 Oct 2000, Samuel W. Heywood wrote:
> >> October 1582
> >> S M Tu W Th F S
> >> 1 2 3 4 15 16
> >> 17 18 19 20 21 22 23
> >> 24 25 26 27 28 29 30
> >> 31
>
> >> The calendar above is ordered according to pure bull, by official edict of
> >> Pope Gregory XIII.
>
> > When I try "cal 10 1582" on my Linux the result is
>
> > October 1582
> > Su Mo Tu We Th Fr Sa
> > 1 2 3 4 5 6
> > 7 8 9 10 11 12 13
> > 14 15 16 17 18 19 20
> > 21 22 23 24 25 26 27
> > 28 29 30 31
>
> > So if (for example) 31 Oct 1582 was Monday - is there a bug with this
> > program (cal), and maybe with any other program like it ?
>
> > Hristo
>
> Hello Hristo:
>
> >From the point of view of all good Roman Catholics, your program is
> heretical. The calendar I have posted above is correct for October 1582
> according to the decree of Pope Gregory XIII. For political reasons the
> protestant countries did not adopt the Gregorian Calendar at the time.
> Eventually all countries under the Christian sphere of influence came
> to understand the sense of making adjustments to their calendar. The
> longer they waited to apply the correction, the greater became the amount
> of the correction to be applied. The English adjusted their calendar in
> 1752. There are a few countries that did not adjust their calendars until
> the 19th and early 20th centuries. An adjustment was needed because the
> old calendar system, called the Julian Calendar, was already obsolete
> after it was discovered that the Julian Calendar was based on a somewhat
> inaccurate calculation for the length of the year. The error was
> cumulative. By October of 1582 the error amounted to a period of 10 days.
> Pope Gregory XIII decided to correct the problem simply by erasing 10 days
> from October of that year and by introducing a change in the rule whereby
> leap years are assigned. To erase the 10 days from October 1582 he
> decreed that October 4th of that year would be followed the next day by
> October 15th. When the various protestant countries came around to
> adjusting their calendars, they applied appropriate corrections at the
> time so as to bring their calendars into conformity with the Gregorian
> Calendar. The corrections were not applied retroactively. The calendar
> your program has produced is correct for protestants, but wrong for
> Roman Catholics.
>
> Sam Heywood
Yes, Sam you are right ! See result for "cal 9 1752" :
September 1752
Su Mo Tu We Th Fr Sa
1 2 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
Thanks for your comment, I did not know it before ! But every thing is
described in manual - "man cal" .
RTFM
Hristo, Bulgaria
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