Re: Week number

[Peter Dyballa <Peter_Dyballa@Web.DE>]

Am 14.10.2008 um 22:25 schrieb Xavier Maillard:

> I compared the results of your function and the result from a
> simple (format-time-string "%W") for the current date and I got
> week 42 for the former and week 41 for the latter. Can you
> explain this ?

On the command line 'date +%W' returns 41 – although here in Germany  
it's already 42nd week ... This number is displayed by 'date +%V'. My  
documentation says:

      %V    is replaced by the week number of the year (Monday as the  
first day
            of the week) as a decimal number (01-53).  If the week  
containing
            January 1 has four or more days in the new year, then it  
is week 1;
            otherwise it is the last week of the previous year, and  
the next
            week is week 1.

      %W    is replaced by the week number of the year (Monday as the  
first day
            of the week) as a decimal number (00-53).

So %W counts the complete weeks and %V counts the legal weeks. And  
(format-time-string "%V") returns 42 for me. See also 'man strftime'.

--
Greetings

   Pete

The world would be a better place if Larry Wall had been born in  
Iceland, or any other country where the native language actually has  
syntax.
				– Peter da Silva