Re: 'cal 9 1752' and emacs calendar disagree

[Ed Reingold]

No, it is not a bug.  The odd Sept 1752 was only that way in England and her 
colonies--not in general.  It is the Unix cal program that is in error.  The 
Emacs calendar shows the Gregorian calendar, period.  But it allows one to get 
dates on many other calendars as well, such as the Julian.  What cal gives is 
the first part of the month on Julian calendar and the latter part on the 
Gregorian--that is nonsense.

The date the switch was made is geographically dependent and stretched over a 
period of hundreds of years.


> 
> Hi there,
> 
> For some historical reasons¹, September 1752 is a special month that
> has no 3 - 13 dates. As you can see, 'cal 9 1752' will gives
> 
>    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
> 
> 
> While emacs calendar gives:
> 
>    September 1752    
> 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
> 
> Is this a bug?
> 
> Footnotes: 
> ¹  http://www.farid-hajji.net/fun/cj-cal91752.html
> -- 
> Leon
> 
> 
> 
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