Well, I wanted the list to a) start with Sunday, and b) have the "short" day name.

So I modified your code to something like this: 

perl -MDateTime -le '@wd=map {DateTime->new(locale=> "de", year=>1970,
+month=>1,day=>4+$_)->strftime("%a")} (0..6);print join",",@wd'

[download]
Which does work, but for Germany this interestingly produces 
So.,Mo.,Di.,Mi.,Do.,Fr.,Sa.

[download]
instead of the desired 
So,Mo,Di,Mi,Do,Fr,Sa

[download]
It doesn't look like DateTime can handle %a returning only 2 chars. -- No Idea why :-)

In reply to Re^2: Localized weekday names by Sec
in thread Localized weekday names by Sec

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